./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4d1a05335dcd475270df3d2b7e447bf62801b1b41377a4a2d9fc94b2523fc1ec --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:30:33,587 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:30:33,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:30:33,642 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:30:33,643 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:30:33,647 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:30:33,648 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:30:33,652 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:30:33,655 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:30:33,660 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:30:33,661 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:30:33,663 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:30:33,664 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:30:33,666 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:30:33,668 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:30:33,673 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:30:33,674 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:30:33,675 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:30:33,681 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:30:33,688 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:30:33,690 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:30:33,691 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:30:33,694 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:30:33,695 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:30:33,703 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:30:33,704 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:30:33,704 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:30:33,706 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:30:33,707 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:30:33,708 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:30:33,708 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:30:33,709 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:30:33,711 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:30:33,712 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:30:33,714 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:30:33,714 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:30:33,715 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:30:33,715 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:30:33,715 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:30:33,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:30:33,717 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:30:33,717 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:30:33,760 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:30:33,761 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:30:33,762 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:30:33,762 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:30:33,763 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:30:33,763 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:30:33,763 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:30:33,763 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:30:33,763 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:30:33,764 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:30:33,765 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:30:33,765 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:30:33,765 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:30:33,765 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:30:33,765 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:30:33,766 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:30:33,767 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:30:33,767 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:30:33,767 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:30:33,767 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:30:33,767 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:30:33,768 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:30:33,768 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:30:33,768 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:30:33,768 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:30:33,768 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:30:33,769 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:30:33,769 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:30:33,769 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:30:33,770 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:30:33,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:30:33,771 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:30:33,771 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:30:33,772 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:30:33,772 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:30:33,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:30:33,772 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:30:33,772 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:30:33,772 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:30:33,773 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_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d1a05335dcd475270df3d2b7e447bf62801b1b41377a4a2d9fc94b2523fc1ec [2021-11-03 04:30:34,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:30:34,059 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:30:34,062 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:30:34,063 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:30:34,064 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:30:34,064 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c [2021-11-03 04:30:34,122 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/data/93ba80cc8/68bd1fa0a9ab4180842ed3c9a7c960c6/FLAG7f1dcf0f3 [2021-11-03 04:30:34,690 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:30:34,690 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c [2021-11-03 04:30:34,739 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/data/93ba80cc8/68bd1fa0a9ab4180842ed3c9a7c960c6/FLAG7f1dcf0f3 [2021-11-03 04:30:34,953 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/data/93ba80cc8/68bd1fa0a9ab4180842ed3c9a7c960c6 [2021-11-03 04:30:34,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:30:34,956 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:30:34,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:30:34,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:30:34,961 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:30:34,962 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:30:34" (1/1) ... [2021-11-03 04:30:34,963 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3465b30c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:30:34, skipping insertion in model container [2021-11-03 04:30:34,963 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:30:34" (1/1) ... [2021-11-03 04:30:34,982 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:30:35,073 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:30:35,495 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_222578f0-b253-4ab0-80b7-6b7afb68bf03/sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c[75550,75563] [2021-11-03 04:30:35,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:30:35,530 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-03 04:30:35,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3f927827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:30:35, skipping insertion in model container [2021-11-03 04:30:35,539 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:30:35,540 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:30:35,542 INFO L168 Benchmark]: Toolchain (without parser) took 584.17 ms. Allocated memory was 88.1 MB in the beginning and 113.2 MB in the end (delta: 25.2 MB). Free memory was 49.3 MB in the beginning and 79.3 MB in the end (delta: -29.9 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB. [2021-11-03 04:30:35,544 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 88.1 MB. Free memory was 68.4 MB in the beginning and 68.4 MB in the end (delta: 45.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:30:35,545 INFO L168 Benchmark]: CACSL2BoogieTranslator took 581.67 ms. Allocated memory was 88.1 MB in the beginning and 113.2 MB in the end (delta: 25.2 MB). Free memory was 49.1 MB in the beginning and 79.3 MB in the end (delta: -30.2 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB. [2021-11-03 04:30:35,548 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 88.1 MB. Free memory was 68.4 MB in the beginning and 68.4 MB in the end (delta: 45.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 581.67 ms. Allocated memory was 88.1 MB in the beginning and 113.2 MB in the end (delta: 25.2 MB). Free memory was 49.1 MB in the beginning and 79.3 MB in the end (delta: -30.2 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1050]: 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_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4d1a05335dcd475270df3d2b7e447bf62801b1b41377a4a2d9fc94b2523fc1ec --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:30:37,646 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:30:37,648 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:30:37,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:30:37,699 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:30:37,704 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:30:37,710 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:30:37,715 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:30:37,718 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:30:37,728 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:30:37,729 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:30:37,731 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:30:37,732 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:30:37,734 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:30:37,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:30:37,737 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:30:37,741 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:30:37,742 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:30:37,744 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:30:37,748 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:30:37,752 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:30:37,753 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:30:37,757 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:30:37,758 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:30:37,764 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:30:37,765 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:30:37,765 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:30:37,767 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:30:37,768 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:30:37,769 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:30:37,769 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:30:37,770 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:30:37,772 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:30:37,773 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:30:37,775 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:30:37,775 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:30:37,776 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:30:37,776 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:30:37,776 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:30:37,778 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:30:37,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:30:37,779 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 04:30:37,826 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:30:37,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:30:37,828 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:30:37,828 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:30:37,828 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:30:37,828 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:30:37,829 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:30:37,829 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:30:37,829 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:30:37,830 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:30:37,831 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:30:37,832 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:30:37,832 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:30:37,832 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:30:37,832 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:30:37,833 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:30:37,833 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:30:37,833 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:30:37,833 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:30:37,833 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:30:37,834 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:30:37,834 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:30:37,834 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:30:37,834 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:30:37,835 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:30:37,835 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:30:37,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:30:37,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:30:37,836 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:30:37,836 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:30:37,836 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:30:37,836 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:30:37,837 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:30:37,837 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:30:37,837 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:30:37,838 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_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d1a05335dcd475270df3d2b7e447bf62801b1b41377a4a2d9fc94b2523fc1ec [2021-11-03 04:30:38,227 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:30:38,260 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:30:38,263 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:30:38,265 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:30:38,265 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:30:38,266 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c [2021-11-03 04:30:38,347 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/data/1403904ee/fbaec30da5544d5c8528b2c3abb73f02/FLAGd4d9be9fc [2021-11-03 04:30:39,132 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:30:39,132 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c [2021-11-03 04:30:39,164 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/data/1403904ee/fbaec30da5544d5c8528b2c3abb73f02/FLAGd4d9be9fc [2021-11-03 04:30:39,277 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/data/1403904ee/fbaec30da5544d5c8528b2c3abb73f02 [2021-11-03 04:30:39,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:30:39,287 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:30:39,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:30:39,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:30:39,292 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:30:39,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:30:39" (1/1) ... [2021-11-03 04:30:39,294 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b93536c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:30:39, skipping insertion in model container [2021-11-03 04:30:39,294 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:30:39" (1/1) ... [2021-11-03 04:30:39,302 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:30:39,380 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:30:39,776 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_222578f0-b253-4ab0-80b7-6b7afb68bf03/sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c[75550,75563] [2021-11-03 04:30:39,786 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:30:39,805 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:30:39,818 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:30:40,009 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_222578f0-b253-4ab0-80b7-6b7afb68bf03/sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c[75550,75563] [2021-11-03 04:30:40,018 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:30:40,032 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:30:40,192 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_222578f0-b253-4ab0-80b7-6b7afb68bf03/sv-benchmarks/c/openssl/s3_srvr.blast.15.i.cil-1.c[75550,75563] [2021-11-03 04:30:40,194 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:30:40,225 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:30:40,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:30:40 WrapperNode [2021-11-03 04:30:40,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:30:40,227 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:30:40,227 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:30:40,227 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:30:40,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:30:40" (1/1) ... [2021-11-03 04:30:40,274 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:30:40" (1/1) ... [2021-11-03 04:30:40,347 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:30:40,348 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:30:40,348 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:30:40,348 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:30:40,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:30:40" (1/1) ... [2021-11-03 04:30:40,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:30:40" (1/1) ... [2021-11-03 04:30:40,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:30:40" (1/1) ... [2021-11-03 04:30:40,387 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:30:40" (1/1) ... [2021-11-03 04:30:40,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:30:40" (1/1) ... [2021-11-03 04:30:40,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:30:40" (1/1) ... [2021-11-03 04:30:40,471 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:30:40" (1/1) ... [2021-11-03 04:30:40,493 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:30:40,500 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:30:40,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:30:40,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:30:40,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:30:40" (1/1) ... [2021-11-03 04:30:40,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:30:40,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:30:40,543 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:30:40,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:30:40,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:30:40,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 04:30:40,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:30:40,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 04:30:40,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 04:30:40,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 04:30:40,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:30:40,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:30:40,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 04:30:40,864 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-03 04:30:49,319 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-03 04:30:49,319 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-03 04:30:49,329 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:30:49,329 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-03 04:30:49,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:30:49 BoogieIcfgContainer [2021-11-03 04:30:49,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:30:49,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:30:49,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:30:49,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:30:49,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:30:39" (1/3) ... [2021-11-03 04:30:49,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fab423a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:30:49, skipping insertion in model container [2021-11-03 04:30:49,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:30:40" (2/3) ... [2021-11-03 04:30:49,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fab423a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:30:49, skipping insertion in model container [2021-11-03 04:30:49,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:30:49" (3/3) ... [2021-11-03 04:30:49,355 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.15.i.cil-1.c [2021-11-03 04:30:49,361 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:30:49,361 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 04:30:49,405 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:30:49,411 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 04:30:49,411 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 04:30:49,429 INFO L276 IsEmpty]: Start isEmpty. Operand has 153 states, 151 states have (on average 1.7218543046357615) internal successors, (260), 152 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:30:49,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-03 04:30:49,438 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:30:49,438 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] [2021-11-03 04:30:49,439 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:30:49,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:30:49,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1630857892, now seen corresponding path program 1 times [2021-11-03 04:30:49,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:30:49,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [870988232] [2021-11-03 04:30:49,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:30:49,461 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:30:49,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:30:49,464 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:30:49,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:30:49,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:30:49,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 04:30:49,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:49,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-03 04:30:49,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-03 04:30:50,029 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:30:50,032 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-03 04:30:50,040 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:30:50,044 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-03 04:30:50,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 319 [2021-11-03 04:30:50,510 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-03 04:30:50,511 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 8 case distinctions, treesize of input 717 treesize of output 669 [2021-11-03 04:30:50,568 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:30:50,570 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-03 04:30:50,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 210 [2021-11-03 04:30:50,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 101 [2021-11-03 04:30:50,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 13 [2021-11-03 04:30:50,834 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-03 04:30:50,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 13 [2021-11-03 04:30:50,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:30:50,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 13 [2021-11-03 04:30:50,907 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 37 treesize of output 25 [2021-11-03 04:30:50,911 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 22 treesize of output 10 [2021-11-03 04:30:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:51,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:51,285 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:30:51,287 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-03 04:30:51,293 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:30:51,295 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-03 04:30:51,436 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:30:51,438 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-03 04:30:51,445 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:30:51,448 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-03 04:30:51,459 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:30:51,462 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-03 04:30:51,477 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:30:51,481 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-03 04:30:51,508 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:30:51,512 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-03 04:30:51,538 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:30:51,543 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-03 04:30:52,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:52,064 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:30:52,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [870988232] [2021-11-03 04:30:52,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [870988232] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:30:52,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:30:52,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:30:52,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400619663] [2021-11-03 04:30:52,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:30:52,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:30:52,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:30:52,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:30:52,087 INFO L87 Difference]: Start difference. First operand has 153 states, 151 states have (on average 1.7218543046357615) internal successors, (260), 152 states have internal predecessors, (260), 0 states have call successors, (0), 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 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:06,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:31:06,443 INFO L93 Difference]: Finished difference Result 307 states and 519 transitions. [2021-11-03 04:31:06,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:31:06,447 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-03 04:31:06,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:31:06,457 INFO L225 Difference]: With dead ends: 307 [2021-11-03 04:31:06,458 INFO L226 Difference]: Without dead ends: 140 [2021-11-03 04:31:06,462 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:31:06,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-03 04:31:06,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2021-11-03 04:31:06,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.5467625899280575) internal successors, (215), 139 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:06,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 215 transitions. [2021-11-03 04:31:06,533 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 215 transitions. Word has length 45 [2021-11-03 04:31:06,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:31:06,533 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 215 transitions. [2021-11-03 04:31:06,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:06,534 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 215 transitions. [2021-11-03 04:31:06,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-03 04:31:06,537 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:31:06,537 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:31:06,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:31:06,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:31:06,755 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:31:06,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:31:06,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1766716126, now seen corresponding path program 1 times [2021-11-03 04:31:06,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:31:06,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362856189] [2021-11-03 04:31:06,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:06,757 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:31:06,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:31:06,759 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:31:06,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:31:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:07,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:31:07,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:07,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:31:07,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:31:07,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:31:07,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:31:07,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:31:07,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:31:07,691 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:31:07,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 04:31:11,206 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:31:11,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 04:31:19,166 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:31:19,167 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 183 treesize of output 87 [2021-11-03 04:31:19,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:19,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:27,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:27,643 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:31:27,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362856189] [2021-11-03 04:31:27,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362856189] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:31:27,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:31:27,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 6 [2021-11-03 04:31:27,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673038602] [2021-11-03 04:31:27,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:31:27,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:31:27,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:31:27,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=15, Unknown=3, NotChecked=0, Total=30 [2021-11-03 04:31:27,648 INFO L87 Difference]: Start difference. First operand 140 states and 215 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:56,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:31:56,774 INFO L93 Difference]: Finished difference Result 298 states and 458 transitions. [2021-11-03 04:31:56,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:31:56,777 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 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 45 [2021-11-03 04:31:56,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:31:56,779 INFO L225 Difference]: With dead ends: 298 [2021-11-03 04:31:56,780 INFO L226 Difference]: Without dead ends: 168 [2021-11-03 04:31:56,781 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=18, Invalid=21, Unknown=3, NotChecked=0, Total=42 [2021-11-03 04:31:56,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-03 04:31:56,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 151. [2021-11-03 04:31:56,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.56) internal successors, (234), 150 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:56,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 234 transitions. [2021-11-03 04:31:56,797 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 234 transitions. Word has length 45 [2021-11-03 04:31:56,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:31:56,798 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 234 transitions. [2021-11-03 04:31:56,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:31:56,798 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 234 transitions. [2021-11-03 04:31:56,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-03 04:31:56,801 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:31:56,801 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:31:56,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:31:57,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:31:57,008 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:31:57,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:31:57,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1817968786, now seen corresponding path program 1 times [2021-11-03 04:31:57,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:31:57,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1615951299] [2021-11-03 04:31:57,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:31:57,011 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:31:57,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:31:57,012 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:31:57,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:31:57,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:31:57,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:31:57,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:57,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:31:57,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:31:57,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:31:57,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:31:57,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:31:57,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:31:58,115 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:31:58,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 04:32:01,505 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:32:01,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 04:32:08,962 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:32:08,964 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 183 treesize of output 87 [2021-11-03 04:32:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:09,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:32:09,491 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:32:09,491 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:32:09,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1615951299] [2021-11-03 04:32:09,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1615951299] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:32:09,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:32:09,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:32:09,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034487954] [2021-11-03 04:32:09,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:32:09,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:32:09,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:32:09,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:32:09,495 INFO L87 Difference]: Start difference. First operand 151 states and 234 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:51,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:32:51,132 INFO L93 Difference]: Finished difference Result 417 states and 643 transitions. [2021-11-03 04:32:51,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:32:51,134 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-03 04:32:51,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:32:51,136 INFO L225 Difference]: With dead ends: 417 [2021-11-03 04:32:51,136 INFO L226 Difference]: Without dead ends: 287 [2021-11-03 04:32:51,138 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 04:32:51,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-03 04:32:51,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 167. [2021-11-03 04:32:51,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.5602409638554218) internal successors, (259), 166 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:51,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 259 transitions. [2021-11-03 04:32:51,154 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 259 transitions. Word has length 58 [2021-11-03 04:32:51,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:32:51,154 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 259 transitions. [2021-11-03 04:32:51,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:32:51,155 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 259 transitions. [2021-11-03 04:32:51,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 04:32:51,157 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:32:51,157 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:32:51,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:32:51,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:32:51,373 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:32:51,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:32:51,374 INFO L85 PathProgramCache]: Analyzing trace with hash 329403111, now seen corresponding path program 1 times [2021-11-03 04:32:51,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:32:51,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1105274874] [2021-11-03 04:32:51,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:32:51,375 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:32:51,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:32:51,375 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:32:51,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:32:51,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:32:51,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:32:52,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:32:52,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:52,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:52,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:52,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:52,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:32:52,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:32:52,432 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:32:52,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 04:32:55,645 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:32:55,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 04:33:02,390 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:33:02,390 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 183 treesize of output 87 [2021-11-03 04:33:02,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:02,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:33:02,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:33:02,953 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:33:02,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1105274874] [2021-11-03 04:33:02,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1105274874] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:33:02,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:33:02,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:33:02,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591799745] [2021-11-03 04:33:02,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:33:02,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:33:02,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:33:02,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:33:02,958 INFO L87 Difference]: Start difference. First operand 167 states and 259 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:56,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:33:56,098 INFO L93 Difference]: Finished difference Result 447 states and 692 transitions. [2021-11-03 04:33:56,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:33:56,099 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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 59 [2021-11-03 04:33:56,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:33:56,102 INFO L225 Difference]: With dead ends: 447 [2021-11-03 04:33:56,102 INFO L226 Difference]: Without dead ends: 301 [2021-11-03 04:33:56,103 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 04:33:56,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-11-03 04:33:56,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 178. [2021-11-03 04:33:56,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.5423728813559323) internal successors, (273), 177 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:56,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 273 transitions. [2021-11-03 04:33:56,118 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 273 transitions. Word has length 59 [2021-11-03 04:33:56,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:33:56,119 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 273 transitions. [2021-11-03 04:33:56,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:33:56,119 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 273 transitions. [2021-11-03 04:33:56,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 04:33:56,122 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:33:56,123 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:33:56,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-03 04:33:56,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:33:56,327 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:33:56,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:33:56,328 INFO L85 PathProgramCache]: Analyzing trace with hash -2078660741, now seen corresponding path program 1 times [2021-11-03 04:33:56,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:33:56,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [47559745] [2021-11-03 04:33:56,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:33:56,329 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:33:56,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:33:56,330 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:33:56,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:33:57,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:33:57,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:33:57,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:33:57,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:57,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:57,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:57,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:57,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:33:57,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:33:57,467 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:33:57,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 04:34:00,740 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:34:00,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 04:34:07,603 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:34:07,603 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 183 treesize of output 87 [2021-11-03 04:34:07,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:07,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:08,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:08,102 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:34:08,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [47559745] [2021-11-03 04:34:08,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [47559745] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:08,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:08,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:34:08,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984698198] [2021-11-03 04:34:08,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:34:08,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:34:08,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:34:08,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:34:08,105 INFO L87 Difference]: Start difference. First operand 178 states and 273 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:44,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:34:44,829 INFO L93 Difference]: Finished difference Result 462 states and 710 transitions. [2021-11-03 04:34:44,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:34:44,830 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-03 04:34:44,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:34:44,833 INFO L225 Difference]: With dead ends: 462 [2021-11-03 04:34:44,833 INFO L226 Difference]: Without dead ends: 305 [2021-11-03 04:34:44,834 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 04:34:44,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-11-03 04:34:44,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 191. [2021-11-03 04:34:44,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.5263157894736843) internal successors, (290), 190 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:44,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 290 transitions. [2021-11-03 04:34:44,847 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 290 transitions. Word has length 59 [2021-11-03 04:34:44,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:34:44,848 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 290 transitions. [2021-11-03 04:34:44,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:34:44,848 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 290 transitions. [2021-11-03 04:34:44,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 04:34:44,851 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:34:44,851 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:34:44,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:34:45,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:34:45,063 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:34:45,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:34:45,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1364189778, now seen corresponding path program 1 times [2021-11-03 04:34:45,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:34:45,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [434265223] [2021-11-03 04:34:45,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:34:45,065 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:34:45,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:34:45,066 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:34:45,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 04:34:45,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:34:45,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:34:45,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:34:45,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:34:45,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:34:45,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:34:45,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:34:45,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:34:45,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:34:46,299 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:34:46,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 04:34:49,709 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:34:49,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 04:34:57,557 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:34:57,557 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 183 treesize of output 87 [2021-11-03 04:34:57,737 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:57,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:34:58,082 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:34:58,082 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:34:58,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [434265223] [2021-11-03 04:34:58,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [434265223] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:34:58,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:34:58,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:34:58,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790956970] [2021-11-03 04:34:58,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:34:58,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:34:58,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:34:58,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:34:58,084 INFO L87 Difference]: Start difference. First operand 191 states and 290 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:32,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:35:32,905 INFO L93 Difference]: Finished difference Result 497 states and 759 transitions. [2021-11-03 04:35:32,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:35:32,907 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-03 04:35:32,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:35:32,909 INFO L225 Difference]: With dead ends: 497 [2021-11-03 04:35:32,910 INFO L226 Difference]: Without dead ends: 327 [2021-11-03 04:35:32,910 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 04:35:32,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-11-03 04:35:32,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 213. [2021-11-03 04:35:32,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.528301886792453) internal successors, (324), 212 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:32,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 324 transitions. [2021-11-03 04:35:32,924 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 324 transitions. Word has length 59 [2021-11-03 04:35:32,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:35:32,924 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 324 transitions. [2021-11-03 04:35:32,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:35:32,925 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 324 transitions. [2021-11-03 04:35:32,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 04:35:32,926 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:35:32,927 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:35:32,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:35:33,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:35:33,135 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:35:33,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:35:33,136 INFO L85 PathProgramCache]: Analyzing trace with hash -639030510, now seen corresponding path program 1 times [2021-11-03 04:35:33,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:35:33,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1108998789] [2021-11-03 04:35:33,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:35:33,137 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:35:33,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:35:33,137 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:35:33,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 04:35:33,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:35:33,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:35:33,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:35:33,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:33,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:33,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:33,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:33,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:35:33,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:35:34,222 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:35:34,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 04:35:37,510 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:35:37,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 04:35:44,950 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:35:44,964 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 183 treesize of output 87 [2021-11-03 04:35:45,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:35:45,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:35:45,491 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:35:45,491 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:35:45,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1108998789] [2021-11-03 04:35:45,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1108998789] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:35:45,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:35:45,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:35:45,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319515883] [2021-11-03 04:35:45,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:35:45,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:35:45,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:35:45,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:35:45,494 INFO L87 Difference]: Start difference. First operand 213 states and 324 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:26,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:36:26,728 INFO L93 Difference]: Finished difference Result 520 states and 795 transitions. [2021-11-03 04:36:26,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:36:26,729 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-03 04:36:26,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:36:26,732 INFO L225 Difference]: With dead ends: 520 [2021-11-03 04:36:26,732 INFO L226 Difference]: Without dead ends: 328 [2021-11-03 04:36:26,733 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 04:36:26,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-11-03 04:36:26,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 214. [2021-11-03 04:36:26,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 1.516431924882629) internal successors, (323), 213 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:26,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 323 transitions. [2021-11-03 04:36:26,745 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 323 transitions. Word has length 59 [2021-11-03 04:36:26,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:36:26,746 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 323 transitions. [2021-11-03 04:36:26,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:36:26,746 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 323 transitions. [2021-11-03 04:36:26,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 04:36:26,748 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:36:26,748 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:36:26,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:36:26,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:36:26,963 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:36:26,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:36:26,964 INFO L85 PathProgramCache]: Analyzing trace with hash -623672389, now seen corresponding path program 1 times [2021-11-03 04:36:26,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:36:26,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [279953216] [2021-11-03 04:36:26,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:36:26,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:36:26,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:36:26,966 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:36:26,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:36:27,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:36:27,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:36:27,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:36:27,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:27,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:27,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:27,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:27,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:36:27,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:36:28,284 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:36:28,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 04:36:31,558 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:36:31,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 04:36:38,463 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:36:38,463 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 183 treesize of output 87 [2021-11-03 04:36:38,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:36:38,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:36:38,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:36:38,938 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:36:38,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [279953216] [2021-11-03 04:36:38,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [279953216] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:36:38,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:36:38,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:36:38,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738941200] [2021-11-03 04:36:38,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:36:38,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:36:38,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:36:38,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:36:38,942 INFO L87 Difference]: Start difference. First operand 214 states and 323 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:37:18,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:37:18,487 INFO L93 Difference]: Finished difference Result 515 states and 782 transitions. [2021-11-03 04:37:18,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:37:18,488 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-03 04:37:18,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:37:18,490 INFO L225 Difference]: With dead ends: 515 [2021-11-03 04:37:18,491 INFO L226 Difference]: Without dead ends: 322 [2021-11-03 04:37:18,491 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 04:37:18,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-11-03 04:37:18,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 215. [2021-11-03 04:37:18,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.5) internal successors, (321), 214 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:37:18,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 321 transitions. [2021-11-03 04:37:18,503 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 321 transitions. Word has length 60 [2021-11-03 04:37:18,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:37:18,504 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 321 transitions. [2021-11-03 04:37:18,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:37:18,504 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 321 transitions. [2021-11-03 04:37:18,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 04:37:18,506 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:37:18,506 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:37:18,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:37:18,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:37:18,711 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:37:18,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:37:18,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1498911040, now seen corresponding path program 1 times [2021-11-03 04:37:18,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:37:18,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [626597956] [2021-11-03 04:37:18,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:37:18,713 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:37:18,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:37:18,714 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:37:18,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 04:37:19,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:37:19,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:37:19,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:37:19,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:19,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:19,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:19,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:19,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:37:19,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:37:20,056 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:37:20,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 04:37:23,304 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:37:23,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 04:37:30,360 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:37:30,361 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 183 treesize of output 87 [2021-11-03 04:37:30,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:37:30,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:37:30,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:37:30,901 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:37:30,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [626597956] [2021-11-03 04:37:30,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [626597956] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:37:30,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:37:30,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:37:30,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280204570] [2021-11-03 04:37:30,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:37:30,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:37:30,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:37:30,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:37:30,903 INFO L87 Difference]: Start difference. First operand 215 states and 321 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:38:08,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:38:08,131 INFO L93 Difference]: Finished difference Result 516 states and 777 transitions. [2021-11-03 04:38:08,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:38:08,132 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 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 61 [2021-11-03 04:38:08,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:38:08,134 INFO L225 Difference]: With dead ends: 516 [2021-11-03 04:38:08,134 INFO L226 Difference]: Without dead ends: 322 [2021-11-03 04:38:08,135 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 04:38:08,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-11-03 04:38:08,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 216. [2021-11-03 04:38:08,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.4837209302325582) internal successors, (319), 215 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:38:08,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 319 transitions. [2021-11-03 04:38:08,147 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 319 transitions. Word has length 61 [2021-11-03 04:38:08,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:38:08,147 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 319 transitions. [2021-11-03 04:38:08,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:38:08,148 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 319 transitions. [2021-11-03 04:38:08,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-03 04:38:08,149 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:38:08,149 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:38:08,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:38:08,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:38:08,359 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:38:08,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:38:08,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1596742752, now seen corresponding path program 1 times [2021-11-03 04:38:08,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:38:08,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [291823599] [2021-11-03 04:38:08,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:38:08,361 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:38:08,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:38:08,361 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:38:08,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 04:38:09,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:38:09,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:38:09,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:38:09,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:38:09,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:38:09,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:38:09,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:38:09,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:38:09,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:38:09,716 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:38:09,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 04:38:12,963 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:38:12,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 04:38:20,136 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:38:20,138 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 183 treesize of output 87 [2021-11-03 04:38:20,324 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:38:20,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:38:20,644 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:38:20,644 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:38:20,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [291823599] [2021-11-03 04:38:20,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [291823599] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:38:20,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:38:20,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:38:20,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276288644] [2021-11-03 04:38:20,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:38:20,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:38:20,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:38:20,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:38:20,646 INFO L87 Difference]: Start difference. First operand 216 states and 319 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:00,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:39:00,625 INFO L93 Difference]: Finished difference Result 515 states and 773 transitions. [2021-11-03 04:39:00,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:39:00,627 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-03 04:39:00,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:39:00,629 INFO L225 Difference]: With dead ends: 515 [2021-11-03 04:39:00,629 INFO L226 Difference]: Without dead ends: 320 [2021-11-03 04:39:00,630 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 04:39:00,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-11-03 04:39:00,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 216. [2021-11-03 04:39:00,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.4651162790697674) internal successors, (315), 215 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:00,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 315 transitions. [2021-11-03 04:39:00,641 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 315 transitions. Word has length 62 [2021-11-03 04:39:00,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:39:00,642 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 315 transitions. [2021-11-03 04:39:00,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:00,642 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 315 transitions. [2021-11-03 04:39:00,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-03 04:39:00,643 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:39:00,643 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:39:00,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:39:00,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:39:00,859 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:39:00,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:39:00,860 INFO L85 PathProgramCache]: Analyzing trace with hash 2086351112, now seen corresponding path program 1 times [2021-11-03 04:39:00,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:39:00,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1156134512] [2021-11-03 04:39:00,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:39:00,861 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:39:00,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:39:00,862 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:39:00,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:39:01,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:01,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:39:01,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:39:01,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:01,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:01,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:01,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:01,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:01,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:01,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:01,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:01,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:01,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:01,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:01,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:01,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:01,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:39:01,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:39:01,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:39:01,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:39:01,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:39:02,204 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 04:39:02,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-03 04:39:03,377 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:39:03,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-03 04:39:03,462 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:39:03,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:39:03,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:39:03,748 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:39:03,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1156134512] [2021-11-03 04:39:03,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1156134512] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:39:03,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:39:03,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:39:03,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361469779] [2021-11-03 04:39:03,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:39:03,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:39:03,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:39:03,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:39:03,750 INFO L87 Difference]: Start difference. First operand 216 states and 315 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:11,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:39:11,839 INFO L93 Difference]: Finished difference Result 440 states and 647 transitions. [2021-11-03 04:39:11,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:39:11,847 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-03 04:39:11,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:39:11,849 INFO L225 Difference]: With dead ends: 440 [2021-11-03 04:39:11,849 INFO L226 Difference]: Without dead ends: 245 [2021-11-03 04:39:11,850 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:39:11,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-11-03 04:39:11,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 238. [2021-11-03 04:39:11,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.4556962025316456) internal successors, (345), 237 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:11,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 345 transitions. [2021-11-03 04:39:11,873 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 345 transitions. Word has length 62 [2021-11-03 04:39:11,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:39:11,874 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 345 transitions. [2021-11-03 04:39:11,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:11,874 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 345 transitions. [2021-11-03 04:39:11,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-03 04:39:11,876 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:39:11,876 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:39:11,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:39:12,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:39:12,079 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:39:12,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:39:12,080 INFO L85 PathProgramCache]: Analyzing trace with hash -563287765, now seen corresponding path program 1 times [2021-11-03 04:39:12,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:39:12,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [665928223] [2021-11-03 04:39:12,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:39:12,081 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:39:12,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:39:12,082 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:39:12,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 04:39:13,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:13,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:39:13,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:39:13,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:13,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:13,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:13,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:13,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:13,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:39:13,289 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 04:39:13,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-03 04:39:13,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:39:13,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:39:13,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:39:13,698 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:39:13,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-03 04:39:16,019 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:39:16,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-03 04:39:16,056 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:39:16,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:39:16,477 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:39:16,478 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:39:16,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [665928223] [2021-11-03 04:39:16,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [665928223] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:39:16,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:39:16,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:39:16,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897665527] [2021-11-03 04:39:16,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:39:16,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:39:16,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:39:16,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:39:16,479 INFO L87 Difference]: Start difference. First operand 238 states and 345 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:52,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:39:52,798 INFO L93 Difference]: Finished difference Result 686 states and 1014 transitions. [2021-11-03 04:39:52,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:39:52,799 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 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 84 [2021-11-03 04:39:52,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:39:52,802 INFO L225 Difference]: With dead ends: 686 [2021-11-03 04:39:52,802 INFO L226 Difference]: Without dead ends: 469 [2021-11-03 04:39:52,803 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:39:52,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-11-03 04:39:52,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 293. [2021-11-03 04:39:52,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.4863013698630136) internal successors, (434), 292 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:52,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 434 transitions. [2021-11-03 04:39:52,817 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 434 transitions. Word has length 84 [2021-11-03 04:39:52,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:39:52,818 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 434 transitions. [2021-11-03 04:39:52,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:39:52,818 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 434 transitions. [2021-11-03 04:39:52,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-03 04:39:52,819 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:39:52,820 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:39:52,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-03 04:39:53,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:39:53,027 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:39:53,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:39:53,028 INFO L85 PathProgramCache]: Analyzing trace with hash 2033323436, now seen corresponding path program 1 times [2021-11-03 04:39:53,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:39:53,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1400001710] [2021-11-03 04:39:53,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:39:53,029 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:39:53,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:39:53,031 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:39:53,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 04:39:54,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:54,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:39:54,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:39:54,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:54,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:54,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:54,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:54,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:54,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:39:54,339 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 04:39:54,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-03 04:39:54,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:39:54,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:39:54,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:39:54,715 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:39:54,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-03 04:39:57,131 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:39:57,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-03 04:39:57,182 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:39:57,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:39:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:39:57,616 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:39:57,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1400001710] [2021-11-03 04:39:57,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1400001710] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:39:57,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:39:57,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:39:57,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359053991] [2021-11-03 04:39:57,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:39:57,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:39:57,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:39:57,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:39:57,618 INFO L87 Difference]: Start difference. First operand 293 states and 434 transitions. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:40:28,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:40:28,636 INFO L93 Difference]: Finished difference Result 773 states and 1171 transitions. [2021-11-03 04:40:28,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:40:28,639 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 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 85 [2021-11-03 04:40:28,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:40:28,642 INFO L225 Difference]: With dead ends: 773 [2021-11-03 04:40:28,642 INFO L226 Difference]: Without dead ends: 501 [2021-11-03 04:40:28,643 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:40:28,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-11-03 04:40:28,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 336. [2021-11-03 04:40:28,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 1.5462686567164179) internal successors, (518), 335 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:40:28,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 518 transitions. [2021-11-03 04:40:28,660 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 518 transitions. Word has length 85 [2021-11-03 04:40:28,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:40:28,660 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 518 transitions. [2021-11-03 04:40:28,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:40:28,661 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 518 transitions. [2021-11-03 04:40:28,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-03 04:40:28,663 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:40:28,663 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:40:28,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-03 04:40:28,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:40:28,880 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:40:28,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:40:28,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1665671371, now seen corresponding path program 1 times [2021-11-03 04:40:28,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:40:28,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1425626145] [2021-11-03 04:40:28,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:40:28,882 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:40:28,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:40:28,883 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:40:28,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 04:40:30,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:40:30,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:40:30,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:40:30,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:30,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:30,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:30,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:30,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:30,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:40:30,417 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 04:40:30,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-03 04:40:30,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:40:30,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:40:30,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:40:30,818 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:40:30,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-03 04:40:32,575 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:40:32,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-03 04:40:32,726 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:40:32,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:40:33,231 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:40:33,231 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:40:33,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1425626145] [2021-11-03 04:40:33,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1425626145] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:40:33,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:40:33,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:40:33,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659693284] [2021-11-03 04:40:33,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:40:33,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:40:33,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:40:33,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:40:33,234 INFO L87 Difference]: Start difference. First operand 336 states and 518 transitions. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:41:07,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:41:07,115 INFO L93 Difference]: Finished difference Result 858 states and 1321 transitions. [2021-11-03 04:41:07,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:41:07,117 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 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 112 [2021-11-03 04:41:07,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:41:07,122 INFO L225 Difference]: With dead ends: 858 [2021-11-03 04:41:07,122 INFO L226 Difference]: Without dead ends: 543 [2021-11-03 04:41:07,123 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 216 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:41:07,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-11-03 04:41:07,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 366. [2021-11-03 04:41:07,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 1.5397260273972602) internal successors, (562), 365 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:41:07,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 562 transitions. [2021-11-03 04:41:07,140 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 562 transitions. Word has length 112 [2021-11-03 04:41:07,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:41:07,141 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 562 transitions. [2021-11-03 04:41:07,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:41:07,142 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 562 transitions. [2021-11-03 04:41:07,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-03 04:41:07,143 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:41:07,144 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:41:07,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 04:41:07,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:41:07,360 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:41:07,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:41:07,360 INFO L85 PathProgramCache]: Analyzing trace with hash -726605541, now seen corresponding path program 1 times [2021-11-03 04:41:07,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:41:07,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1195275609] [2021-11-03 04:41:07,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:41:07,361 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:41:07,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:41:07,362 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:41:07,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:41:08,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:41:08,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:41:08,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:41:08,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:08,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:08,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:08,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:08,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:08,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:41:08,905 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 04:41:08,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-03 04:41:08,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:41:08,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:41:08,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:41:09,294 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:41:09,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-03 04:41:11,130 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:41:11,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-03 04:41:11,265 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:41:11,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:41:11,838 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:41:11,838 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:41:11,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1195275609] [2021-11-03 04:41:11,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1195275609] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:41:11,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:41:11,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:41:11,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917541313] [2021-11-03 04:41:11,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:41:11,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:41:11,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:41:11,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:41:11,840 INFO L87 Difference]: Start difference. First operand 366 states and 562 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:41:48,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:41:48,214 INFO L93 Difference]: Finished difference Result 876 states and 1341 transitions. [2021-11-03 04:41:48,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:41:48,216 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 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 113 [2021-11-03 04:41:48,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:41:48,219 INFO L225 Difference]: With dead ends: 876 [2021-11-03 04:41:48,219 INFO L226 Difference]: Without dead ends: 531 [2021-11-03 04:41:48,220 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:41:48,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-11-03 04:41:48,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 366. [2021-11-03 04:41:48,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 1.5315068493150685) internal successors, (559), 365 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:41:48,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 559 transitions. [2021-11-03 04:41:48,237 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 559 transitions. Word has length 113 [2021-11-03 04:41:48,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:41:48,237 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 559 transitions. [2021-11-03 04:41:48,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:41:48,238 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 559 transitions. [2021-11-03 04:41:48,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-03 04:41:48,240 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:41:48,240 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:41:48,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-03 04:41:48,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:41:48,455 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:41:48,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:41:48,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1821991616, now seen corresponding path program 1 times [2021-11-03 04:41:48,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:41:48,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [25675688] [2021-11-03 04:41:48,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:41:48,458 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:41:48,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:41:48,459 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:41:48,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 04:41:49,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:41:49,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:41:49,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:41:50,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:50,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:50,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:50,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:50,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:50,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:41:50,128 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 04:41:50,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-03 04:41:50,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:41:50,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:41:50,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:41:50,509 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:41:50,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-03 04:41:52,362 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:41:52,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-03 04:41:52,493 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:41:52,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:41:52,965 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:41:52,966 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:41:52,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [25675688] [2021-11-03 04:41:52,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [25675688] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:41:52,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:41:52,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:41:52,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244064596] [2021-11-03 04:41:52,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:41:52,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:41:52,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:41:52,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:41:52,967 INFO L87 Difference]: Start difference. First operand 366 states and 559 transitions. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:25,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:42:25,186 INFO L93 Difference]: Finished difference Result 927 states and 1420 transitions. [2021-11-03 04:42:25,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:42:25,187 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 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 113 [2021-11-03 04:42:25,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:42:25,190 INFO L225 Difference]: With dead ends: 927 [2021-11-03 04:42:25,190 INFO L226 Difference]: Without dead ends: 582 [2021-11-03 04:42:25,191 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:42:25,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-11-03 04:42:25,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 432. [2021-11-03 04:42:25,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 1.5266821345707657) internal successors, (658), 431 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:25,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 658 transitions. [2021-11-03 04:42:25,209 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 658 transitions. Word has length 113 [2021-11-03 04:42:25,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:42:25,210 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 658 transitions. [2021-11-03 04:42:25,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:25,211 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 658 transitions. [2021-11-03 04:42:25,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-03 04:42:25,212 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:42:25,213 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:42:25,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-03 04:42:25,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:42:25,434 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:42:25,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:42:25,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1964206957, now seen corresponding path program 1 times [2021-11-03 04:42:25,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:42:25,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669552093] [2021-11-03 04:42:25,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:42:25,436 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:42:25,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:42:25,437 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:42:25,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 04:42:27,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:42:27,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:42:27,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:42:27,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:42:27,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:42:27,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:42:27,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:42:27,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:42:27,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:42:27,333 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 04:42:27,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-03 04:42:27,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:42:27,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:42:27,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:42:27,721 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:42:27,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-03 04:42:29,881 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:42:29,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-03 04:42:30,017 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:42:30,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:42:30,538 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:42:30,539 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:42:30,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669552093] [2021-11-03 04:42:30,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669552093] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:42:30,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:42:30,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:42:30,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922219245] [2021-11-03 04:42:30,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:42:30,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:42:30,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:42:30,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:42:30,541 INFO L87 Difference]: Start difference. First operand 432 states and 658 transitions. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:43:07,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:43:07,608 INFO L93 Difference]: Finished difference Result 1045 states and 1589 transitions. [2021-11-03 04:43:07,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:43:07,609 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 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 118 [2021-11-03 04:43:07,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:43:07,613 INFO L225 Difference]: With dead ends: 1045 [2021-11-03 04:43:07,613 INFO L226 Difference]: Without dead ends: 634 [2021-11-03 04:43:07,614 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 228 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:43:07,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-11-03 04:43:07,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 469. [2021-11-03 04:43:07,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 1.5235042735042734) internal successors, (713), 468 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:43:07,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 713 transitions. [2021-11-03 04:43:07,633 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 713 transitions. Word has length 118 [2021-11-03 04:43:07,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:43:07,633 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 713 transitions. [2021-11-03 04:43:07,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:43:07,634 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 713 transitions. [2021-11-03 04:43:07,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-03 04:43:07,635 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:43:07,636 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:43:07,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-03 04:43:07,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:43:07,859 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:43:07,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:43:07,859 INFO L85 PathProgramCache]: Analyzing trace with hash -99507122, now seen corresponding path program 1 times [2021-11-03 04:43:07,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:43:07,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1257342472] [2021-11-03 04:43:07,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:43:07,860 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:43:07,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:43:07,861 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:43:07,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 04:43:09,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:43:09,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:43:09,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:43:09,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:43:09,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:43:09,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:43:09,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:43:09,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:43:09,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:43:09,693 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 04:43:09,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-03 04:43:09,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:43:09,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:43:09,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:43:10,071 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:43:10,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-03 04:43:12,297 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:43:12,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-03 04:43:12,467 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:43:12,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:43:13,107 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:43:13,107 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:43:13,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1257342472] [2021-11-03 04:43:13,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1257342472] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:43:13,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:43:13,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:43:13,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616527260] [2021-11-03 04:43:13,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:43:13,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:43:13,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:43:13,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:43:13,109 INFO L87 Difference]: Start difference. First operand 469 states and 713 transitions. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:43:51,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:43:51,982 INFO L93 Difference]: Finished difference Result 1075 states and 1631 transitions. [2021-11-03 04:43:51,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:43:51,983 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 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 119 [2021-11-03 04:43:51,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:43:51,987 INFO L225 Difference]: With dead ends: 1075 [2021-11-03 04:43:51,987 INFO L226 Difference]: Without dead ends: 627 [2021-11-03 04:43:51,989 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 230 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:43:51,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-11-03 04:43:52,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 469. [2021-11-03 04:43:52,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 1.5192307692307692) internal successors, (711), 468 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:43:52,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 711 transitions. [2021-11-03 04:43:52,014 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 711 transitions. Word has length 119 [2021-11-03 04:43:52,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:43:52,015 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 711 transitions. [2021-11-03 04:43:52,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:43:52,015 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 711 transitions. [2021-11-03 04:43:52,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-03 04:43:52,017 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:43:52,017 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:43:52,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 04:43:52,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:43:52,239 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:43:52,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:43:52,240 INFO L85 PathProgramCache]: Analyzing trace with hash 28083966, now seen corresponding path program 1 times [2021-11-03 04:43:52,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:43:52,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1574104241] [2021-11-03 04:43:52,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:43:52,242 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:43:52,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:43:52,242 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:43:52,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 04:43:53,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:43:53,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:43:53,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:43:54,046 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:43:54,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:43:54,443 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:43:54,443 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:43:54,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1574104241] [2021-11-03 04:43:54,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1574104241] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:43:54,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:43:54,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:43:54,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466838082] [2021-11-03 04:43:54,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:43:54,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:43:54,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:43:54,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:43:54,446 INFO L87 Difference]: Start difference. First operand 469 states and 711 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:43:54,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:43:54,984 INFO L93 Difference]: Finished difference Result 1749 states and 2671 transitions. [2021-11-03 04:43:54,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:43:54,985 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 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 127 [2021-11-03 04:43:54,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:43:54,991 INFO L225 Difference]: With dead ends: 1749 [2021-11-03 04:43:54,991 INFO L226 Difference]: Without dead ends: 1301 [2021-11-03 04:43:54,992 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:43:54,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-11-03 04:43:55,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 1293. [2021-11-03 04:43:55,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1292 states have (on average 1.520123839009288) internal successors, (1964), 1292 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:43:55,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 1964 transitions. [2021-11-03 04:43:55,067 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 1964 transitions. Word has length 127 [2021-11-03 04:43:55,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:43:55,068 INFO L470 AbstractCegarLoop]: Abstraction has 1293 states and 1964 transitions. [2021-11-03 04:43:55,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:43:55,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 1964 transitions. [2021-11-03 04:43:55,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-03 04:43:55,072 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:43:55,073 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:43:55,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 04:43:55,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:43:55,287 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:43:55,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:43:55,288 INFO L85 PathProgramCache]: Analyzing trace with hash 841592010, now seen corresponding path program 1 times [2021-11-03 04:43:55,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:43:55,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1363842339] [2021-11-03 04:43:55,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:43:55,289 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:43:55,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:43:55,291 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:43:55,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 04:43:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:43:56,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:43:56,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:43:57,314 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-03 04:43:57,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:43:57,761 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-03 04:43:57,762 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:43:57,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1363842339] [2021-11-03 04:43:57,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1363842339] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:43:57,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:43:57,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:43:57,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972405172] [2021-11-03 04:43:57,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:43:57,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:43:57,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:43:57,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:43:57,764 INFO L87 Difference]: Start difference. First operand 1293 states and 1964 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:43:58,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:43:58,779 INFO L93 Difference]: Finished difference Result 2592 states and 3941 transitions. [2021-11-03 04:43:58,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:43:58,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-11-03 04:43:58,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:43:58,789 INFO L225 Difference]: With dead ends: 2592 [2021-11-03 04:43:58,789 INFO L226 Difference]: Without dead ends: 1320 [2021-11-03 04:43:58,791 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:43:58,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2021-11-03 04:43:58,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1320. [2021-11-03 04:43:58,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 1.5155420773313115) internal successors, (1999), 1319 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:43:58,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1999 transitions. [2021-11-03 04:43:58,862 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1999 transitions. Word has length 128 [2021-11-03 04:43:58,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:43:58,862 INFO L470 AbstractCegarLoop]: Abstraction has 1320 states and 1999 transitions. [2021-11-03 04:43:58,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:43:58,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1999 transitions. [2021-11-03 04:43:58,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-03 04:43:58,866 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:43:58,866 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:43:58,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-03 04:43:59,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:43:59,088 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:43:59,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:43:59,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1300268468, now seen corresponding path program 1 times [2021-11-03 04:43:59,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:43:59,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1922705422] [2021-11-03 04:43:59,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:43:59,090 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:43:59,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:43:59,092 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:43:59,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 04:44:00,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:44:00,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:44:00,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:44:01,205 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-03 04:44:01,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:44:01,646 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-03 04:44:01,646 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:44:01,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1922705422] [2021-11-03 04:44:01,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1922705422] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:44:01,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:44:01,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:44:01,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586330443] [2021-11-03 04:44:01,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:44:01,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:44:01,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:44:01,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:44:01,649 INFO L87 Difference]: Start difference. First operand 1320 states and 1999 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:44:01,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:44:01,747 INFO L93 Difference]: Finished difference Result 2621 states and 3977 transitions. [2021-11-03 04:44:01,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:44:01,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-11-03 04:44:01,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:44:01,754 INFO L225 Difference]: With dead ends: 2621 [2021-11-03 04:44:01,754 INFO L226 Difference]: Without dead ends: 1322 [2021-11-03 04:44:01,756 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:44:01,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2021-11-03 04:44:01,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1322. [2021-11-03 04:44:01,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1321 states have (on average 1.514761544284633) internal successors, (2001), 1321 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:44:01,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 2001 transitions. [2021-11-03 04:44:01,809 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 2001 transitions. Word has length 128 [2021-11-03 04:44:01,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:44:01,809 INFO L470 AbstractCegarLoop]: Abstraction has 1322 states and 2001 transitions. [2021-11-03 04:44:01,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:44:01,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 2001 transitions. [2021-11-03 04:44:01,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-03 04:44:01,812 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:44:01,813 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:44:01,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-03 04:44:02,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:44:02,035 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:44:02,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:44:02,035 INFO L85 PathProgramCache]: Analyzing trace with hash 821528815, now seen corresponding path program 1 times [2021-11-03 04:44:02,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:44:02,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1759438270] [2021-11-03 04:44:02,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:44:02,036 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:44:02,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:44:02,037 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:44:02,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 04:44:04,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:44:04,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:44:04,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:44:04,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:44:04,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:44:04,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:44:04,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:44:04,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:44:04,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:44:04,346 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 04:44:04,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-03 04:44:04,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:44:04,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:44:04,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:44:04,750 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:44:04,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-03 04:44:07,258 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:44:07,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-03 04:44:07,408 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:44:07,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:44:08,680 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 04:44:08,680 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:44:08,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1759438270] [2021-11-03 04:44:08,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1759438270] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:44:08,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:44:08,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-03 04:44:08,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740948515] [2021-11-03 04:44:08,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:44:08,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:44:08,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:44:08,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:44:08,682 INFO L87 Difference]: Start difference. First operand 1322 states and 2001 transitions. Second operand has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:44:23,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:44:23,209 INFO L93 Difference]: Finished difference Result 2836 states and 4285 transitions. [2021-11-03 04:44:23,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:44:23,211 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 0 states have call successors, (0), 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 130 [2021-11-03 04:44:23,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:44:23,220 INFO L225 Difference]: With dead ends: 2836 [2021-11-03 04:44:23,220 INFO L226 Difference]: Without dead ends: 1537 [2021-11-03 04:44:23,222 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 252 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:44:23,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2021-11-03 04:44:23,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1449. [2021-11-03 04:44:23,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1448 states have (on average 1.511049723756906) internal successors, (2188), 1448 states have internal predecessors, (2188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:44:23,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 2188 transitions. [2021-11-03 04:44:23,277 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 2188 transitions. Word has length 130 [2021-11-03 04:44:23,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:44:23,277 INFO L470 AbstractCegarLoop]: Abstraction has 1449 states and 2188 transitions. [2021-11-03 04:44:23,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:44:23,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 2188 transitions. [2021-11-03 04:44:23,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-03 04:44:23,280 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:44:23,280 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:44:23,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-03 04:44:23,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:44:23,502 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:44:23,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:44:23,503 INFO L85 PathProgramCache]: Analyzing trace with hash 235252593, now seen corresponding path program 1 times [2021-11-03 04:44:23,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:44:23,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [429713173] [2021-11-03 04:44:23,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:44:23,504 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:44:23,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:44:23,505 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:44:23,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_222578f0-b253-4ab0-80b7-6b7afb68bf03/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-03 04:44:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:44:25,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:44:25,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:44:25,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:44:25,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:44:25,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:44:25,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:44:25,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:44:25,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:44:25,857 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-03 04:44:25,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 38 [2021-11-03 04:44:25,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:44:25,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:44:25,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:44:26,241 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:44:26,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 70 treesize of output 87 [2021-11-03 04:44:27,596 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:44:27,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 108 treesize of output 36 [2021-11-03 04:44:27,795 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 04:44:27,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:44:28,651 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-03 04:44:28,652 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:44:28,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [429713173] [2021-11-03 04:44:28,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [429713173] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:44:28,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:44:28,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-03 04:44:28,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538616569] [2021-11-03 04:44:28,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:44:28,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:44:28,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:44:28,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:44:28,654 INFO L87 Difference]: Start difference. First operand 1449 states and 2188 transitions. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)