./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-2.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_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/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_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/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_82b9d069-d119-4a50-bd67-c9f370584dcd/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 09c9794f5f58d2adbebf8646c3b68c44e11cb48c003f44efee5afa1932865143 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:39:23,577 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:39:23,580 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:39:23,633 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:39:23,633 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:39:23,638 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:39:23,639 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:39:23,643 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:39:23,646 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:39:23,653 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:39:23,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:39:23,656 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:39:23,656 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:39:23,659 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:39:23,662 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:39:23,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:39:23,668 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:39:23,669 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:39:23,672 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:39:23,681 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:39:23,683 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:39:23,684 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:39:23,688 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:39:23,689 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:39:23,692 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:39:23,693 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:39:23,693 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:39:23,695 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:39:23,695 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:39:23,697 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:39:23,697 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:39:23,698 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:39:23,700 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:39:23,701 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:39:23,702 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:39:23,703 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:39:23,703 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:39:23,704 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:39:23,704 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:39:23,705 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:39:23,705 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:39:23,706 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:39:23,750 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:39:23,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:39:23,751 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:39:23,752 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:39:23,752 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:39:23,752 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:39:23,752 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:39:23,752 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:39:23,758 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:39:23,759 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:39:23,760 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:39:23,760 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:39:23,760 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:39:23,761 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:39:23,761 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:39:23,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:39:23,762 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:39:23,762 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:39:23,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:39:23,762 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:39:23,763 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:39:23,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:39:23,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:39:23,763 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:39:23,764 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:39:23,764 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:39:23,764 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:39:23,764 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:39:23,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:39:23,766 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:39:23,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:39:23,766 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:39:23,767 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:39:23,767 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:39:23,767 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:39:23,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:39:23,768 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:39:23,768 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:39:23,768 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:39:23,768 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_82b9d069-d119-4a50-bd67-c9f370584dcd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 09c9794f5f58d2adbebf8646c3b68c44e11cb48c003f44efee5afa1932865143 [2021-11-03 04:39:24,035 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:39:24,061 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:39:24,064 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:39:24,065 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:39:24,066 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:39:24,067 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-2.c [2021-11-03 04:39:24,149 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/data/a08c90f42/e7eb22c790554cd5aa2274487405ccbc/FLAGd5193a8ae [2021-11-03 04:39:24,664 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:39:24,665 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-2.c [2021-11-03 04:39:24,691 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/data/a08c90f42/e7eb22c790554cd5aa2274487405ccbc/FLAGd5193a8ae [2021-11-03 04:39:24,920 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/data/a08c90f42/e7eb22c790554cd5aa2274487405ccbc [2021-11-03 04:39:24,922 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:39:24,923 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:39:24,926 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:39:24,926 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:39:24,930 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:39:24,930 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:39:24" (1/1) ... [2021-11-03 04:39:24,931 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eaa7365 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:24, skipping insertion in model container [2021-11-03 04:39:24,932 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:39:24" (1/1) ... [2021-11-03 04:39:24,941 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:39:25,002 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:39:25,446 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_82b9d069-d119-4a50-bd67-c9f370584dcd/sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-2.c[74416,74429] [2021-11-03 04:39:25,468 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:39:25,489 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 04:39:25,490 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6f85eeee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:25, skipping insertion in model container [2021-11-03 04:39:25,490 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:39:25,491 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:39:25,494 INFO L168 Benchmark]: Toolchain (without parser) took 567.99 ms. Allocated memory is still 132.1 MB. Free memory was 93.8 MB in the beginning and 98.0 MB in the end (delta: -4.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-03 04:39:25,495 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 86.0 MB. Free memory was 57.6 MB in the beginning and 57.6 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:39:25,496 INFO L168 Benchmark]: CACSL2BoogieTranslator took 564.34 ms. Allocated memory is still 132.1 MB. Free memory was 93.8 MB in the beginning and 98.0 MB in the end (delta: -4.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-03 04:39:25,498 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 86.0 MB. Free memory was 57.6 MB in the beginning and 57.6 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 564.34 ms. Allocated memory is still 132.1 MB. Free memory was 93.8 MB in the beginning and 98.0 MB in the end (delta: -4.2 MB). Peak memory consumption was 14.7 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_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/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_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/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_82b9d069-d119-4a50-bd67-c9f370584dcd/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 09c9794f5f58d2adbebf8646c3b68c44e11cb48c003f44efee5afa1932865143 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:39:27,661 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:39:27,666 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:39:27,699 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:39:27,700 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:39:27,701 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:39:27,703 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:39:27,705 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:39:27,708 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:39:27,709 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:39:27,710 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:39:27,711 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:39:27,712 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:39:27,713 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:39:27,715 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:39:27,716 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:39:27,717 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:39:27,718 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:39:27,721 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:39:27,723 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:39:27,725 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:39:27,727 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:39:27,728 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:39:27,729 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:39:27,733 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:39:27,734 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:39:27,734 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:39:27,735 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:39:27,739 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:39:27,740 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:39:27,741 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:39:27,741 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:39:27,742 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:39:27,743 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:39:27,744 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:39:27,745 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:39:27,745 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:39:27,746 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:39:27,746 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:39:27,747 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:39:27,748 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:39:27,751 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 04:39:27,796 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:39:27,796 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:39:27,798 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:39:27,798 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:39:27,798 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:39:27,798 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:39:27,798 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:39:27,799 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:39:27,799 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:39:27,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:39:27,801 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:39:27,801 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:39:27,801 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:39:27,801 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:39:27,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:39:27,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:39:27,802 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:39:27,802 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:39:27,802 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:39:27,803 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:39:27,803 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:39:27,803 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:39:27,803 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:39:27,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:39:27,803 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:39:27,804 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:39:27,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:39:27,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:39:27,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:39:27,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:39:27,805 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:39:27,805 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:39:27,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:39:27,805 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:39:27,806 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:39:27,806 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_82b9d069-d119-4a50-bd67-c9f370584dcd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 09c9794f5f58d2adbebf8646c3b68c44e11cb48c003f44efee5afa1932865143 [2021-11-03 04:39:28,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:39:28,245 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:39:28,248 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:39:28,249 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:39:28,250 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:39:28,250 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-2.c [2021-11-03 04:39:28,326 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/data/6ed6595fa/0b76b101f5004500af4f25276e4d73bd/FLAG0ac6f5f67 [2021-11-03 04:39:28,995 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:39:28,995 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-2.c [2021-11-03 04:39:29,027 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/data/6ed6595fa/0b76b101f5004500af4f25276e4d73bd/FLAG0ac6f5f67 [2021-11-03 04:39:29,262 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/data/6ed6595fa/0b76b101f5004500af4f25276e4d73bd [2021-11-03 04:39:29,264 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:39:29,265 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:39:29,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:39:29,267 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:39:29,270 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:39:29,271 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:39:29" (1/1) ... [2021-11-03 04:39:29,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b7d4fec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:29, skipping insertion in model container [2021-11-03 04:39:29,273 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:39:29" (1/1) ... [2021-11-03 04:39:29,279 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:39:29,339 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:39:29,780 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_82b9d069-d119-4a50-bd67-c9f370584dcd/sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-2.c[74416,74429] [2021-11-03 04:39:29,789 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:39:29,820 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:39:29,838 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:39:29,975 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_82b9d069-d119-4a50-bd67-c9f370584dcd/sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-2.c[74416,74429] [2021-11-03 04:39:29,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:39:29,984 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:39:30,126 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_82b9d069-d119-4a50-bd67-c9f370584dcd/sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-2.c[74416,74429] [2021-11-03 04:39:30,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:39:30,156 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:39:30,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:30 WrapperNode [2021-11-03 04:39:30,157 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:39:30,159 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:39:30,159 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:39:30,159 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:39:30,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:30" (1/1) ... [2021-11-03 04:39:30,206 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:30" (1/1) ... [2021-11-03 04:39:30,278 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:39:30,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:39:30,279 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:39:30,282 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:39:30,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:30" (1/1) ... [2021-11-03 04:39:30,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:30" (1/1) ... [2021-11-03 04:39:30,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:30" (1/1) ... [2021-11-03 04:39:30,320 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:30" (1/1) ... [2021-11-03 04:39:30,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:30" (1/1) ... [2021-11-03 04:39:30,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:30" (1/1) ... [2021-11-03 04:39:30,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:30" (1/1) ... [2021-11-03 04:39:30,423 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:39:30,428 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:39:30,428 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:39:30,429 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:39:30,429 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:30" (1/1) ... [2021-11-03 04:39:30,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:39:30,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:39:30,461 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:39:30,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:39:30,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:39:30,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 04:39:30,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:39:30,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 04:39:30,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 04:39:30,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 04:39:30,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:39:30,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:39:30,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 04:39:30,763 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-03 04:39:39,643 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-03 04:39:39,643 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-03 04:39:39,651 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:39:39,652 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-03 04:39:39,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:39:39 BoogieIcfgContainer [2021-11-03 04:39:39,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:39:39,656 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:39:39,656 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:39:39,658 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:39:39,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:39:29" (1/3) ... [2021-11-03 04:39:39,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f955a29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:39:39, skipping insertion in model container [2021-11-03 04:39:39,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:39:30" (2/3) ... [2021-11-03 04:39:39,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f955a29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:39:39, skipping insertion in model container [2021-11-03 04:39:39,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:39:39" (3/3) ... [2021-11-03 04:39:39,661 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.08.i.cil-2.c [2021-11-03 04:39:39,666 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:39:39,666 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 04:39:39,711 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:39:39,717 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 04:39:39,717 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 04:39:39,734 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states 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 04:39:39,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-03 04:39:39,743 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:39:39,743 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] [2021-11-03 04:39:39,744 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:39:39,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:39:39,749 INFO L85 PathProgramCache]: Analyzing trace with hash 917223126, now seen corresponding path program 1 times [2021-11-03 04:39:39,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:39:39,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1278489841] [2021-11-03 04:39:39,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:39:39,765 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:39:39,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:39:39,771 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:39:39,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:39:40,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:39:40,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 04:39:40,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:39:40,275 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 04:39:40,286 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 04:39:40,403 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:39:40,409 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-03 04:39:40,427 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:39:40,432 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-03 04:39:40,458 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 04:39:40,934 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-03 04:39:40,935 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 04:39:40,988 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:39:40,990 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-03 04:39:41,000 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 04:39:41,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,106 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 04:39:41,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,136 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 04:39:41,265 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-03 04:39:41,266 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 04:39:41,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:39:41,303 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 04:39:41,345 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 04:39:41,350 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 04:39:41,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:39:41,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:39:41,716 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:39:41,721 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-03 04:39:41,726 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:39:41,733 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-03 04:39:41,875 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:39:41,878 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-03 04:39:41,885 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:39:41,888 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-03 04:39:41,899 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:39:41,902 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-03 04:39:41,917 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:39:41,920 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-03 04:39:41,961 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:39:41,965 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-03 04:39:41,993 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:39:41,998 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-03 04:39:42,506 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 04:39:42,506 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:39:42,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1278489841] [2021-11-03 04:39:42,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1278489841] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:39:42,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:39:42,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:39:42,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167808563] [2021-11-03 04:39:42,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:39:42,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:39:42,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:39:42,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:39:42,529 INFO L87 Difference]: Start difference. First operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 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 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:40:03,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:40:03,068 INFO L93 Difference]: Finished difference Result 301 states and 507 transitions. [2021-11-03 04:40:03,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:40:03,070 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-03 04:40:03,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:40:03,079 INFO L225 Difference]: With dead ends: 301 [2021-11-03 04:40:03,080 INFO L226 Difference]: Without dead ends: 137 [2021-11-03 04:40:03,083 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 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 04:40:03,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-03 04:40:03,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-11-03 04:40:03,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.536764705882353) internal successors, (209), 136 states have internal predecessors, (209), 0 states have call successors, (0), 0 states 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 04:40:03,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 209 transitions. [2021-11-03 04:40:03,122 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 209 transitions. Word has length 44 [2021-11-03 04:40:03,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:40:03,123 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 209 transitions. [2021-11-03 04:40:03,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:40:03,124 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 209 transitions. [2021-11-03 04:40:03,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-03 04:40:03,126 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:40:03,126 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] [2021-11-03 04:40:03,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:40:03,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:40:03,340 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:40:03,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:40:03,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1165369620, now seen corresponding path program 1 times [2021-11-03 04:40:03,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:40:03,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1616907447] [2021-11-03 04:40:03,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:40:03,342 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:40:03,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:40:03,346 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:40:03,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:40:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:40:03,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:40:03,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:40:03,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:03,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:03,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:03,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:03,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:03,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:40:04,256 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:40:04,257 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 04:40:07,504 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:40:07,504 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 04:40:15,384 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:40:15,385 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 04:40:15,479 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 04:40:15,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:40:23,791 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 04:40:23,791 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:40:23,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1616907447] [2021-11-03 04:40:23,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1616907447] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:40:23,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:40:23,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 6 [2021-11-03 04:40:23,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89856290] [2021-11-03 04:40:23,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:40:23,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:40:23,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:40:23,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=15, Unknown=3, NotChecked=0, Total=30 [2021-11-03 04:40:23,794 INFO L87 Difference]: Start difference. First operand 137 states and 209 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states 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 04:40:54,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:40:54,262 INFO L93 Difference]: Finished difference Result 292 states and 446 transitions. [2021-11-03 04:40:54,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:40:54,263 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 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 44 [2021-11-03 04:40:54,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:40:54,265 INFO L225 Difference]: With dead ends: 292 [2021-11-03 04:40:54,266 INFO L226 Difference]: Without dead ends: 165 [2021-11-03 04:40:54,267 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 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 04:40:54,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-03 04:40:54,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 148. [2021-11-03 04:40:54,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5510204081632653) internal successors, (228), 147 states have internal predecessors, (228), 0 states have call successors, (0), 0 states 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 04:40:54,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 228 transitions. [2021-11-03 04:40:54,280 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 228 transitions. Word has length 44 [2021-11-03 04:40:54,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:40:54,281 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 228 transitions. [2021-11-03 04:40:54,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states 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 04:40:54,281 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 228 transitions. [2021-11-03 04:40:54,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-03 04:40:54,284 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:40:54,284 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] [2021-11-03 04:40:54,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:40:54,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:40:54,492 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:40:54,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:40:54,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1275810449, now seen corresponding path program 1 times [2021-11-03 04:40:54,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:40:54,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [48207239] [2021-11-03 04:40:54,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:40:54,493 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:40:54,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:40:54,501 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:40:54,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:40:55,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:40:55,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:40:55,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:40:55,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:55,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:55,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:55,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:55,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:40:55,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:40:55,412 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:40:55,413 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 04:40:58,592 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:40:58,593 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 04:41:05,861 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:41:05,862 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 04:41:05,986 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 04:41:05,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:41:06,318 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 04:41:06,318 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:41:06,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [48207239] [2021-11-03 04:41:06,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [48207239] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:41:06,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:41:06,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:41:06,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519787802] [2021-11-03 04:41:06,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:41:06,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:41:06,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:41:06,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:41:06,321 INFO L87 Difference]: Start difference. First operand 148 states and 228 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 04:41:43,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:41:43,379 INFO L93 Difference]: Finished difference Result 409 states and 627 transitions. [2021-11-03 04:41:43,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:41:43,380 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 57 [2021-11-03 04:41:43,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:41:43,383 INFO L225 Difference]: With dead ends: 409 [2021-11-03 04:41:43,383 INFO L226 Difference]: Without dead ends: 282 [2021-11-03 04:41:43,384 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 106 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 04:41:43,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-11-03 04:41:43,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 164. [2021-11-03 04:41:43,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.5521472392638036) internal successors, (253), 163 states have internal predecessors, (253), 0 states have call successors, (0), 0 states 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 04:41:43,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 253 transitions. [2021-11-03 04:41:43,399 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 253 transitions. Word has length 57 [2021-11-03 04:41:43,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:41:43,400 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 253 transitions. [2021-11-03 04:41:43,400 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 04:41:43,400 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 253 transitions. [2021-11-03 04:41:43,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-03 04:41:43,403 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:41:43,403 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] [2021-11-03 04:41:43,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-03 04:41:43,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:41:43,617 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:41:43,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:41:43,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1447117946, now seen corresponding path program 1 times [2021-11-03 04:41:43,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:41:43,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [456793169] [2021-11-03 04:41:43,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:41:43,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:41:43,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:41:43,621 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:41:43,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:41:44,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:41:44,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:41:44,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:41:44,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:44,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:44,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:44,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:44,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:41:44,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:41:44,630 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:41:44,630 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 04:41:47,792 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:41:47,793 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 04:41:54,485 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:41:54,486 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 04:41:54,622 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 04:41:54,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:41:54,944 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 04:41:54,944 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:41:54,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [456793169] [2021-11-03 04:41:54,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [456793169] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:41:54,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:41:54,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:41:54,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516976030] [2021-11-03 04:41:54,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:41:54,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:41:54,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:41:54,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:41:54,946 INFO L87 Difference]: Start difference. First operand 164 states and 253 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:26,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:42:26,686 INFO L93 Difference]: Finished difference Result 439 states and 676 transitions. [2021-11-03 04:42:26,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:42:26,687 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-03 04:42:26,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:42:26,689 INFO L225 Difference]: With dead ends: 439 [2021-11-03 04:42:26,690 INFO L226 Difference]: Without dead ends: 296 [2021-11-03 04:42:26,690 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 04:42:26,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-11-03 04:42:26,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 175. [2021-11-03 04:42:26,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.5344827586206897) internal successors, (267), 174 states have internal predecessors, (267), 0 states have call successors, (0), 0 states 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 04:42:26,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 267 transitions. [2021-11-03 04:42:26,705 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 267 transitions. Word has length 58 [2021-11-03 04:42:26,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:42:26,705 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 267 transitions. [2021-11-03 04:42:26,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:42:26,706 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 267 transitions. [2021-11-03 04:42:26,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-03 04:42:26,708 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:42:26,709 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] [2021-11-03 04:42:26,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-03 04:42:26,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:42:26,924 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:42:26,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:42:26,924 INFO L85 PathProgramCache]: Analyzing trace with hash 399607142, now seen corresponding path program 1 times [2021-11-03 04:42:26,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:42:26,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1401705812] [2021-11-03 04:42:26,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:42:26,929 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:42:26,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:42:26,930 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:42:26,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:42:27,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:42:27,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:42:27,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:42:27,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:42:27,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:42:27,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:42:27,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:42:27,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:42:27,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:42:27,963 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:42:27,964 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 04:42:31,019 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:42:31,019 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 04:42:37,776 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:42:37,776 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 04:42:37,937 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 04:42:37,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:42:38,206 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 04:42:38,206 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:42:38,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1401705812] [2021-11-03 04:42:38,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1401705812] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:42:38,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:42:38,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:42:38,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280692291] [2021-11-03 04:42:38,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:42:38,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:42:38,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:42:38,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:42:38,208 INFO L87 Difference]: Start difference. First operand 175 states and 267 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 04:43:15,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:43:15,712 INFO L93 Difference]: Finished difference Result 454 states and 694 transitions. [2021-11-03 04:43:15,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:43:15,714 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 58 [2021-11-03 04:43:15,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:43:15,716 INFO L225 Difference]: With dead ends: 454 [2021-11-03 04:43:15,716 INFO L226 Difference]: Without dead ends: 300 [2021-11-03 04:43:15,717 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 04:43:15,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-11-03 04:43:15,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 188. [2021-11-03 04:43:15,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.518716577540107) internal successors, (284), 187 states have internal predecessors, (284), 0 states have call successors, (0), 0 states 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 04:43:15,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 284 transitions. [2021-11-03 04:43:15,730 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 284 transitions. Word has length 58 [2021-11-03 04:43:15,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:43:15,730 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 284 transitions. [2021-11-03 04:43:15,730 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 04:43:15,730 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 284 transitions. [2021-11-03 04:43:15,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-03 04:43:15,732 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:43:15,733 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] [2021-11-03 04:43:15,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:43:15,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:43:15,939 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:43:15,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:43:15,940 INFO L85 PathProgramCache]: Analyzing trace with hash -736259153, now seen corresponding path program 1 times [2021-11-03 04:43:15,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:43:15,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [681241107] [2021-11-03 04:43:15,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:43:15,941 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:43:15,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:43:15,942 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:43:15,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 04:43:16,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:43:16,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:43:16,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:43:16,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:43:16,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:43:16,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:43:16,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:43:16,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:43:16,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:43:17,042 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:43:17,042 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 04:43:20,321 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:43:20,321 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 04:43:27,773 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:43:27,774 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 04:43:27,923 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 04:43:27,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:43:28,274 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 04:43:28,274 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:43:28,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [681241107] [2021-11-03 04:43:28,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [681241107] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:43:28,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:43:28,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:43:28,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919814356] [2021-11-03 04:43:28,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:43:28,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:43:28,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:43:28,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:43:28,276 INFO L87 Difference]: Start difference. First operand 188 states and 284 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 04:44:25,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:44:25,452 INFO L93 Difference]: Finished difference Result 473 states and 719 transitions. [2021-11-03 04:44:25,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:44:25,453 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 58 [2021-11-03 04:44:25,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:44:25,455 INFO L225 Difference]: With dead ends: 473 [2021-11-03 04:44:25,455 INFO L226 Difference]: Without dead ends: 306 [2021-11-03 04:44:25,455 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 04:44:25,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-11-03 04:44:25,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 194. [2021-11-03 04:44:25,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.5233160621761659) internal successors, (294), 193 states have internal predecessors, (294), 0 states have call successors, (0), 0 states 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 04:44:25,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 294 transitions. [2021-11-03 04:44:25,467 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 294 transitions. Word has length 58 [2021-11-03 04:44:25,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:44:25,467 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 294 transitions. [2021-11-03 04:44:25,467 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 04:44:25,468 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 294 transitions. [2021-11-03 04:44:25,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-03 04:44:25,469 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:44:25,470 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] [2021-11-03 04:44:25,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:44:25,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:44:25,679 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:44:25,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:44:25,680 INFO L85 PathProgramCache]: Analyzing trace with hash 584594159, now seen corresponding path program 1 times [2021-11-03 04:44:25,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:44:25,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1488350951] [2021-11-03 04:44:25,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:44:25,681 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:44:25,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:44:25,681 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:44:25,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 04:44:26,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:44:26,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:44:26,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:44:26,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:44:26,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:44:26,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:44:26,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:44:26,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:44:26,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:44:26,739 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:44:26,739 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 04:44:29,918 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:44:29,919 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 04:44:37,158 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:44:37,158 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 04:44:37,287 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 04:44:37,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:44:37,563 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 04:44:37,563 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:44:37,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1488350951] [2021-11-03 04:44:37,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1488350951] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:44:37,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:44:37,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:44:37,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121717691] [2021-11-03 04:44:37,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:44:37,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:44:37,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:44:37,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:44:37,565 INFO L87 Difference]: Start difference. First operand 194 states and 294 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 04:45:20,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:45:20,231 INFO L93 Difference]: Finished difference Result 477 states and 726 transitions. [2021-11-03 04:45:20,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:45:20,233 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 58 [2021-11-03 04:45:20,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:45:20,235 INFO L225 Difference]: With dead ends: 477 [2021-11-03 04:45:20,235 INFO L226 Difference]: Without dead ends: 304 [2021-11-03 04:45:20,236 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 04:45:20,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-11-03 04:45:20,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 194. [2021-11-03 04:45:20,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.5129533678756477) internal successors, (292), 193 states have internal predecessors, (292), 0 states have call successors, (0), 0 states 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 04:45:20,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 292 transitions. [2021-11-03 04:45:20,249 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 292 transitions. Word has length 58 [2021-11-03 04:45:20,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:45:20,249 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 292 transitions. [2021-11-03 04:45:20,249 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 04:45:20,250 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 292 transitions. [2021-11-03 04:45:20,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 04:45:20,251 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:45:20,251 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] [2021-11-03 04:45:20,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:45:20,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:45:20,459 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:45:20,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:45:20,460 INFO L85 PathProgramCache]: Analyzing trace with hash 307994918, now seen corresponding path program 1 times [2021-11-03 04:45:20,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:45:20,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2022207478] [2021-11-03 04:45:20,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:45:20,461 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:45:20,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:45:20,461 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:45:20,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:45:21,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:45:21,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:45:21,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:45:21,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:45:21,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:45:21,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:45:21,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:45:21,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:45:21,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:45:21,834 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:45:21,834 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 04:45:25,172 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:45:25,172 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 04:45:32,103 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:45:32,103 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 04:45:32,243 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 04:45:32,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:45:32,516 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 04:45:32,517 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:45:32,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2022207478] [2021-11-03 04:45:32,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2022207478] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:45:32,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:45:32,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:45:32,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352718047] [2021-11-03 04:45:32,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:45:32,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:45:32,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:45:32,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:45:32,518 INFO L87 Difference]: Start difference. First operand 194 states and 292 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:46:07,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:46:07,378 INFO L93 Difference]: Finished difference Result 483 states and 731 transitions. [2021-11-03 04:46:07,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:46:07,379 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-03 04:46:07,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:46:07,381 INFO L225 Difference]: With dead ends: 483 [2021-11-03 04:46:07,381 INFO L226 Difference]: Without dead ends: 310 [2021-11-03 04:46:07,382 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 04:46:07,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-11-03 04:46:07,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 207. [2021-11-03 04:46:07,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.5) internal successors, (309), 206 states have internal predecessors, (309), 0 states have call successors, (0), 0 states 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 04:46:07,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 309 transitions. [2021-11-03 04:46:07,392 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 309 transitions. Word has length 59 [2021-11-03 04:46:07,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:46:07,392 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 309 transitions. [2021-11-03 04:46:07,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:46:07,392 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 309 transitions. [2021-11-03 04:46:07,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 04:46:07,393 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:46:07,394 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] [2021-11-03 04:46:07,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:46:07,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:46:07,608 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:46:07,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:46:07,608 INFO L85 PathProgramCache]: Analyzing trace with hash 141214081, now seen corresponding path program 1 times [2021-11-03 04:46:07,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:46:07,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1279971818] [2021-11-03 04:46:07,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:46:07,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:46:07,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:46:07,609 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:46:07,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 04:46:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:46:08,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:46:08,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:46:08,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:46:08,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:46:08,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:46:08,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:46:08,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:46:08,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:46:08,837 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:46:08,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 04:46:12,188 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:46:12,188 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 04:46:19,243 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:46:19,244 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 04:46:19,379 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 04:46:19,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:46:19,695 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 04:46:19,695 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:46:19,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1279971818] [2021-11-03 04:46:19,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1279971818] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:46:19,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:46:19,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:46:19,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802412350] [2021-11-03 04:46:19,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:46:19,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:46:19,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:46:19,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:46:19,697 INFO L87 Difference]: Start difference. First operand 207 states and 309 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 04:47:00,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:47:00,728 INFO L93 Difference]: Finished difference Result 496 states and 746 transitions. [2021-11-03 04:47:00,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:47:00,729 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 60 [2021-11-03 04:47:00,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:47:00,731 INFO L225 Difference]: With dead ends: 496 [2021-11-03 04:47:00,732 INFO L226 Difference]: Without dead ends: 310 [2021-11-03 04:47:00,732 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 04:47:00,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-11-03 04:47:00,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 208. [2021-11-03 04:47:00,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.4879227053140096) internal successors, (308), 207 states have internal predecessors, (308), 0 states have call successors, (0), 0 states 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 04:47:00,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 308 transitions. [2021-11-03 04:47:00,742 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 308 transitions. Word has length 60 [2021-11-03 04:47:00,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:47:00,742 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 308 transitions. [2021-11-03 04:47:00,742 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 04:47:00,743 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 308 transitions. [2021-11-03 04:47:00,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 04:47:00,743 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:47:00,744 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] [2021-11-03 04:47:00,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-03 04:47:00,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:47:00,961 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:47:00,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:47:00,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1939173537, now seen corresponding path program 1 times [2021-11-03 04:47:00,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:47:00,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1340942373] [2021-11-03 04:47:00,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:47:00,962 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:47:00,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:47:00,965 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:47:00,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 04:47:02,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:47:02,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:47:02,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:47:02,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:47:02,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:47:02,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:47:02,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:47:02,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:47:02,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:47:02,416 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:47:02,416 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 04:47:05,572 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:47:05,572 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 04:47:12,627 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:47:12,628 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 04:47:12,762 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 04:47:12,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:47:13,036 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 04:47:13,036 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:47:13,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1340942373] [2021-11-03 04:47:13,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1340942373] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:47:13,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:47:13,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:47:13,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599026998] [2021-11-03 04:47:13,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:47:13,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:47:13,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:47:13,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:47:13,038 INFO L87 Difference]: Start difference. First operand 208 states and 308 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 04:48:03,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:48:03,276 INFO L93 Difference]: Finished difference Result 495 states and 744 transitions. [2021-11-03 04:48:03,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:48:03,277 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 61 [2021-11-03 04:48:03,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:48:03,279 INFO L225 Difference]: With dead ends: 495 [2021-11-03 04:48:03,279 INFO L226 Difference]: Without dead ends: 308 [2021-11-03 04:48:03,279 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 04:48:03,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-11-03 04:48:03,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 208. [2021-11-03 04:48:03,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.4734299516908214) internal successors, (305), 207 states have internal predecessors, (305), 0 states have call successors, (0), 0 states 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 04:48:03,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 305 transitions. [2021-11-03 04:48:03,288 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 305 transitions. Word has length 61 [2021-11-03 04:48:03,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:48:03,288 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 305 transitions. [2021-11-03 04:48:03,289 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 04:48:03,289 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 305 transitions. [2021-11-03 04:48:03,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-03 04:48:03,290 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:48:03,290 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] [2021-11-03 04:48:03,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:48:03,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:48:03,504 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:48:03,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:48:03,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1682794951, now seen corresponding path program 1 times [2021-11-03 04:48:03,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:48:03,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1622059397] [2021-11-03 04:48:03,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:48:03,505 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:48:03,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:48:03,505 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:48:03,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:48:04,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:48:04,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:48:04,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:48:04,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:48:04,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:48:04,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:48:04,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:48:04,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:48:04,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:48:04,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:48:04,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:48:04,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:48:04,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:48:04,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:48:04,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:48:04,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:48:04,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:48:04,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:48:04,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:48:04,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:48:04,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:48:04,769 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 04:48:04,770 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 04:48:05,839 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:48:05,840 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 04:48:05,925 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 04:48:05,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:48:06,246 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 04:48:06,246 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:48:06,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1622059397] [2021-11-03 04:48:06,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1622059397] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:48:06,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:48:06,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:48:06,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900025951] [2021-11-03 04:48:06,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:48:06,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:48:06,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:48:06,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:48:06,248 INFO L87 Difference]: Start difference. First operand 208 states and 305 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:48:14,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:48:14,895 INFO L93 Difference]: Finished difference Result 424 states and 627 transitions. [2021-11-03 04:48:14,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:48:14,901 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-03 04:48:14,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:48:14,903 INFO L225 Difference]: With dead ends: 424 [2021-11-03 04:48:14,903 INFO L226 Difference]: Without dead ends: 237 [2021-11-03 04:48:14,903 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 116 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 04:48:14,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-11-03 04:48:14,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 230. [2021-11-03 04:48:14,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.462882096069869) internal successors, (335), 229 states have internal predecessors, (335), 0 states have call successors, (0), 0 states 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 04:48:14,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 335 transitions. [2021-11-03 04:48:14,918 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 335 transitions. Word has length 61 [2021-11-03 04:48:14,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:48:14,918 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 335 transitions. [2021-11-03 04:48:14,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:48:14,918 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 335 transitions. [2021-11-03 04:48:14,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-03 04:48:14,919 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:48:14,920 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] [2021-11-03 04:48:14,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:48:15,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:48:15,120 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:48:15,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:48:15,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1249670907, now seen corresponding path program 1 times [2021-11-03 04:48:15,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:48:15,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1911636417] [2021-11-03 04:48:15,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:48:15,122 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:48:15,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:48:15,122 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:48:15,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 04:48:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:48:16,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:48:16,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:48:16,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:48:16,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:48:16,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:48:16,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:48:16,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:48:16,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:48:16,273 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 04:48:16,273 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 04:48:16,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:48:16,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:48:16,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:48:16,628 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:48:16,628 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 04:48:18,715 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:48:18,716 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 04:48:18,751 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 04:48:18,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:48:19,114 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 04:48:19,114 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:48:19,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1911636417] [2021-11-03 04:48:19,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1911636417] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:48:19,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:48:19,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:48:19,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793376606] [2021-11-03 04:48:19,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:48:19,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:48:19,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:48:19,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:48:19,116 INFO L87 Difference]: Start difference. First operand 230 states and 335 transitions. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states 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 04:48:48,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:48:48,491 INFO L93 Difference]: Finished difference Result 664 states and 983 transitions. [2021-11-03 04:48:48,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:48:48,493 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 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 83 [2021-11-03 04:48:48,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:48:48,496 INFO L225 Difference]: With dead ends: 664 [2021-11-03 04:48:48,496 INFO L226 Difference]: Without dead ends: 455 [2021-11-03 04:48:48,496 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 158 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 04:48:48,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-11-03 04:48:48,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 284. [2021-11-03 04:48:48,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 1.4911660777385158) internal successors, (422), 283 states have internal predecessors, (422), 0 states have call successors, (0), 0 states 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 04:48:48,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 422 transitions. [2021-11-03 04:48:48,512 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 422 transitions. Word has length 83 [2021-11-03 04:48:48,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:48:48,513 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 422 transitions. [2021-11-03 04:48:48,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states 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 04:48:48,513 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 422 transitions. [2021-11-03 04:48:48,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-03 04:48:48,514 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:48:48,514 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 04:48:48,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:48:48,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:48:48,731 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:48:48,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:48:48,732 INFO L85 PathProgramCache]: Analyzing trace with hash -287501208, now seen corresponding path program 1 times [2021-11-03 04:48:48,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:48:48,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [702473291] [2021-11-03 04:48:48,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:48:48,733 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:48:48,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:48:48,734 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:48:48,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 04:48:49,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:48:49,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:48:49,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:48:49,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:48:49,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:48:49,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:48:49,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:48:49,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:48:49,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:48:50,029 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 04:48:50,030 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 04:48:50,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:48:50,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:48:50,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:48:50,347 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:48:50,347 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 04:48:52,430 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:48:52,430 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 04:48:52,461 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 04:48:52,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:48:52,832 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 04:48:52,832 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:48:52,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [702473291] [2021-11-03 04:48:52,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [702473291] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:48:52,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:48:52,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:48:52,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994127581] [2021-11-03 04:48:52,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:48:52,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:48:52,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:48:52,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:48:52,834 INFO L87 Difference]: Start difference. First operand 284 states and 422 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 04:49:14,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:49:14,094 INFO L93 Difference]: Finished difference Result 731 states and 1100 transitions. [2021-11-03 04:49:14,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:49:14,096 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 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 04:49:14,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:49:14,099 INFO L225 Difference]: With dead ends: 731 [2021-11-03 04:49:14,099 INFO L226 Difference]: Without dead ends: 468 [2021-11-03 04:49:14,100 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 04:49:14,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-11-03 04:49:14,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 306. [2021-11-03 04:49:14,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.5245901639344261) internal successors, (465), 305 states have internal predecessors, (465), 0 states have call successors, (0), 0 states 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 04:49:14,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 465 transitions. [2021-11-03 04:49:14,112 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 465 transitions. Word has length 84 [2021-11-03 04:49:14,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:49:14,113 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 465 transitions. [2021-11-03 04:49:14,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 04:49:14,113 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 465 transitions. [2021-11-03 04:49:14,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-03 04:49:14,115 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:49:14,115 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] [2021-11-03 04:49:14,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 04:49:14,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:49:14,333 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:49:14,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:49:14,333 INFO L85 PathProgramCache]: Analyzing trace with hash 2055153251, now seen corresponding path program 1 times [2021-11-03 04:49:14,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:49:14,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [966265733] [2021-11-03 04:49:14,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:49:14,335 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:49:14,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:49:14,336 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:49:14,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 04:49:15,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:49:15,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:49:15,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:49:15,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:49:15,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:49:15,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:49:15,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:49:15,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:49:15,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:49:15,850 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 04:49:15,851 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 04:49:15,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:49:15,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:49:15,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:49:16,207 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:49:16,207 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 04:49:17,741 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:49:17,742 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 04:49:17,870 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 04:49:17,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:49:18,269 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 04:49:18,269 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:49:18,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [966265733] [2021-11-03 04:49:18,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [966265733] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:49:18,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:49:18,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:49:18,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428829858] [2021-11-03 04:49:18,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:49:18,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:49:18,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:49:18,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:49:18,271 INFO L87 Difference]: Start difference. First operand 306 states and 465 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 04:49:41,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:49:41,510 INFO L93 Difference]: Finished difference Result 790 states and 1212 transitions. [2021-11-03 04:49:41,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:49:41,511 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 112 [2021-11-03 04:49:41,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:49:41,514 INFO L225 Difference]: With dead ends: 790 [2021-11-03 04:49:41,514 INFO L226 Difference]: Without dead ends: 505 [2021-11-03 04:49:41,515 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 04:49:41,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-11-03 04:49:41,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 356. [2021-11-03 04:49:41,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 1.5380281690140845) internal successors, (546), 355 states have internal predecessors, (546), 0 states have call successors, (0), 0 states 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 04:49:41,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 546 transitions. [2021-11-03 04:49:41,530 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 546 transitions. Word has length 112 [2021-11-03 04:49:41,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:49:41,530 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 546 transitions. [2021-11-03 04:49:41,531 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 04:49:41,531 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 546 transitions. [2021-11-03 04:49:41,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-03 04:49:41,532 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:49:41,533 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] [2021-11-03 04:49:41,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-03 04:49:41,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:49:41,747 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:49:41,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:49:41,748 INFO L85 PathProgramCache]: Analyzing trace with hash 31547282, now seen corresponding path program 1 times [2021-11-03 04:49:41,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:49:41,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [514381010] [2021-11-03 04:49:41,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:49:41,749 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:49:41,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:49:41,750 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:49:41,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:49:43,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:49:43,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:49:43,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:49:43,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:49:43,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:49:43,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:49:43,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:49:43,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:49:43,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:49:43,331 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 04:49:43,331 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 04:49:43,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:49:43,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:49:43,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:49:43,673 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:49:43,673 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 04:49:45,637 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:49:45,638 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 04:49:45,751 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 04:49:45,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:49:46,340 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 04:49:46,341 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:49:46,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [514381010] [2021-11-03 04:49:46,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [514381010] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:49:46,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:49:46,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:49:46,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879756720] [2021-11-03 04:49:46,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:49:46,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:49:46,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:49:46,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:49:46,342 INFO L87 Difference]: Start difference. First operand 356 states and 546 transitions. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 04:50:18,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:50:18,226 INFO L93 Difference]: Finished difference Result 890 states and 1362 transitions. [2021-11-03 04:50:18,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:50:18,227 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 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 117 [2021-11-03 04:50:18,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:50:18,230 INFO L225 Difference]: With dead ends: 890 [2021-11-03 04:50:18,230 INFO L226 Difference]: Without dead ends: 555 [2021-11-03 04:50:18,231 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 226 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 04:50:18,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-11-03 04:50:18,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 393. [2021-11-03 04:50:18,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 1.5408163265306123) internal successors, (604), 392 states have internal predecessors, (604), 0 states have call successors, (0), 0 states 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 04:50:18,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 604 transitions. [2021-11-03 04:50:18,246 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 604 transitions. Word has length 117 [2021-11-03 04:50:18,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:50:18,247 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 604 transitions. [2021-11-03 04:50:18,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states 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 04:50:18,247 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 604 transitions. [2021-11-03 04:50:18,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-03 04:50:18,249 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:50:18,249 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] [2021-11-03 04:50:18,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 04:50:18,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:50:18,467 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:50:18,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:50:18,468 INFO L85 PathProgramCache]: Analyzing trace with hash 2052049301, now seen corresponding path program 1 times [2021-11-03 04:50:18,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:50:18,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [996030991] [2021-11-03 04:50:18,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:50:18,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:50:18,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:50:18,471 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:50:18,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 04:50:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:50:19,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:50:19,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:50:20,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:50:20,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:50:20,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:50:20,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:50:20,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:50:20,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:50:20,083 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 04:50:20,084 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 04:50:20,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:50:20,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:50:20,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:50:20,416 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:50:20,416 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 04:50:22,346 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:50:22,346 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 04:50:22,460 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 04:50:22,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:50:22,906 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 04:50:22,906 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:50:22,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [996030991] [2021-11-03 04:50:22,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [996030991] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:50:22,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:50:22,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:50:22,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203252514] [2021-11-03 04:50:22,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:50:22,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:50:22,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:50:22,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:50:22,907 INFO L87 Difference]: Start difference. First operand 393 states and 604 transitions. Second operand has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states 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 04:50:49,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:50:49,573 INFO L93 Difference]: Finished difference Result 922 states and 1411 transitions. [2021-11-03 04:50:49,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:50:49,575 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 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 04:50:49,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:50:49,578 INFO L225 Difference]: With dead ends: 922 [2021-11-03 04:50:49,578 INFO L226 Difference]: Without dead ends: 550 [2021-11-03 04:50:49,579 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 04:50:49,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-11-03 04:50:49,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 393. [2021-11-03 04:50:49,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 1.5357142857142858) internal successors, (602), 392 states have internal predecessors, (602), 0 states have call successors, (0), 0 states 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 04:50:49,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 602 transitions. [2021-11-03 04:50:49,596 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 602 transitions. Word has length 118 [2021-11-03 04:50:49,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:50:49,597 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 602 transitions. [2021-11-03 04:50:49,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states 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 04:50:49,597 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 602 transitions. [2021-11-03 04:50:49,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-03 04:50:49,598 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:50:49,598 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] [2021-11-03 04:50:49,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 04:50:49,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:50:49,810 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:50:49,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:50:49,811 INFO L85 PathProgramCache]: Analyzing trace with hash -690173642, now seen corresponding path program 1 times [2021-11-03 04:50:49,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:50:49,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [862031590] [2021-11-03 04:50:49,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:50:49,812 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:50:49,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:50:49,812 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:50:49,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 04:50:51,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:50:51,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:50:51,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:50:51,452 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 04:50:51,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:50:51,795 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 04:50:51,795 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:50:51,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [862031590] [2021-11-03 04:50:51,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [862031590] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:50:51,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:50:51,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:50:51,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685665779] [2021-11-03 04:50:51,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:50:51,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:50:51,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:50:51,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:50:51,797 INFO L87 Difference]: Start difference. First operand 393 states and 602 transitions. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 04:50:52,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:50:52,468 INFO L93 Difference]: Finished difference Result 1447 states and 2237 transitions. [2021-11-03 04:50:52,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:50:52,468 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 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 126 [2021-11-03 04:50:52,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:50:52,477 INFO L225 Difference]: With dead ends: 1447 [2021-11-03 04:50:52,477 INFO L226 Difference]: Without dead ends: 1075 [2021-11-03 04:50:52,478 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 248 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 04:50:52,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-11-03 04:50:52,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 1068. [2021-11-03 04:50:52,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 1.5398313027179007) internal successors, (1643), 1067 states have internal predecessors, (1643), 0 states have call successors, (0), 0 states 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 04:50:52,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1643 transitions. [2021-11-03 04:50:52,525 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1643 transitions. Word has length 126 [2021-11-03 04:50:52,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:50:52,526 INFO L470 AbstractCegarLoop]: Abstraction has 1068 states and 1643 transitions. [2021-11-03 04:50:52,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 04:50:52,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1643 transitions. [2021-11-03 04:50:52,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-03 04:50:52,529 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:50:52,530 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 04:50:52,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-03 04:50:52,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:50:52,754 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:50:52,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:50:52,755 INFO L85 PathProgramCache]: Analyzing trace with hash -153420368, now seen corresponding path program 1 times [2021-11-03 04:50:52,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:50:52,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847047338] [2021-11-03 04:50:52,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:50:52,756 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:50:52,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:50:52,757 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:50:52,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 04:50:54,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:50:54,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:50:54,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:50:54,358 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 04:50:54,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:50:54,709 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 04:50:54,709 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:50:54,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847047338] [2021-11-03 04:50:54,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847047338] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:50:54,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:50:54,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:50:54,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200838153] [2021-11-03 04:50:54,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:50:54,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:50:54,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:50:54,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:50:54,713 INFO L87 Difference]: Start difference. First operand 1068 states and 1643 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 04:50:55,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:50:55,472 INFO L93 Difference]: Finished difference Result 2142 states and 3299 transitions. [2021-11-03 04:50:55,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:50:55,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 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 04:50:55,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:50:55,479 INFO L225 Difference]: With dead ends: 2142 [2021-11-03 04:50:55,479 INFO L226 Difference]: Without dead ends: 1095 [2021-11-03 04:50:55,481 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 251 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 04:50:55,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2021-11-03 04:50:55,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 1095. [2021-11-03 04:50:55,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1095 states, 1094 states have (on average 1.5338208409506398) internal successors, (1678), 1094 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states 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 04:50:55,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1678 transitions. [2021-11-03 04:50:55,519 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1678 transitions. Word has length 127 [2021-11-03 04:50:55,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:50:55,520 INFO L470 AbstractCegarLoop]: Abstraction has 1095 states and 1678 transitions. [2021-11-03 04:50:55,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 04:50:55,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1678 transitions. [2021-11-03 04:50:55,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-03 04:50:55,522 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:50:55,523 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 04:50:55,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 04:50:55,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:50:55,741 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:50:55,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:50:55,741 INFO L85 PathProgramCache]: Analyzing trace with hash -776701970, now seen corresponding path program 1 times [2021-11-03 04:50:55,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:50:55,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1708338344] [2021-11-03 04:50:55,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:50:55,742 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:50:55,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:50:55,744 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:50:55,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 04:50:57,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:50:57,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:50:57,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:50:57,410 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 04:50:57,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:50:57,775 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 04:50:57,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:50:57,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1708338344] [2021-11-03 04:50:57,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1708338344] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:50:57,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:50:57,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:50:57,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568306083] [2021-11-03 04:50:57,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:50:57,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:50:57,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:50:57,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:50:57,777 INFO L87 Difference]: Start difference. First operand 1095 states and 1678 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:57,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:50:57,831 INFO L93 Difference]: Finished difference Result 2171 states and 3335 transitions. [2021-11-03 04:50:57,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:50:57,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-11-03 04:50:57,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:50:57,836 INFO L225 Difference]: With dead ends: 2171 [2021-11-03 04:50:57,837 INFO L226 Difference]: Without dead ends: 1097 [2021-11-03 04:50:57,838 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 251 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 04:50:57,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2021-11-03 04:50:57,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 1097. [2021-11-03 04:50:57,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 1096 states have (on average 1.532846715328467) internal successors, (1680), 1096 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states 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 04:50:57,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1680 transitions. [2021-11-03 04:50:57,884 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1680 transitions. Word has length 127 [2021-11-03 04:50:57,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:50:57,885 INFO L470 AbstractCegarLoop]: Abstraction has 1097 states and 1680 transitions. [2021-11-03 04:50:57,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:50:57,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1680 transitions. [2021-11-03 04:50:57,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-03 04:50:57,887 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:50:57,887 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 04:50:57,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 04:50:58,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:50:58,104 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:50:58,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:50:58,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1575541617, now seen corresponding path program 1 times [2021-11-03 04:50:58,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:50:58,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1255613037] [2021-11-03 04:50:58,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:50:58,106 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:50:58,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:50:58,106 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:50:58,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 04:50:59,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:50:59,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:50:59,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:51:00,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:00,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:00,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:00,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:00,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:00,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:51:00,201 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 04:51:00,202 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 04:51:00,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:51:00,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:51:00,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:51:00,583 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:51:00,583 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 04:51:02,739 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:51:02,740 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 04:51:02,865 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 04:51:02,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:51:03,951 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 04:51:03,951 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:51:03,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1255613037] [2021-11-03 04:51:03,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1255613037] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:51:03,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:51:03,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-03 04:51:03,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724986751] [2021-11-03 04:51:03,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:51:03,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:51:03,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:51:03,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:51:03,954 INFO L87 Difference]: Start difference. First operand 1097 states and 1680 transitions. Second operand has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 04:51:25,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:51:25,893 INFO L93 Difference]: Finished difference Result 2392 states and 3655 transitions. [2021-11-03 04:51:25,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:51:25,895 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 0 states have call successors, (0), 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 04:51:25,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:51:25,901 INFO L225 Difference]: With dead ends: 2392 [2021-11-03 04:51:25,901 INFO L226 Difference]: Without dead ends: 1318 [2021-11-03 04:51:25,902 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 248 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:51:25,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-11-03 04:51:25,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1224. [2021-11-03 04:51:25,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1223 states have (on average 1.5314799672935404) internal successors, (1873), 1223 states have internal predecessors, (1873), 0 states have call successors, (0), 0 states 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 04:51:25,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 1873 transitions. [2021-11-03 04:51:25,946 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 1873 transitions. Word has length 128 [2021-11-03 04:51:25,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:51:25,946 INFO L470 AbstractCegarLoop]: Abstraction has 1224 states and 1873 transitions. [2021-11-03 04:51:25,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 0 states have call successors, (0), 0 states 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 04:51:25,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 1873 transitions. [2021-11-03 04:51:25,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-03 04:51:25,949 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:51:25,949 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 04:51:25,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-03 04:51:26,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:51:26,169 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:51:26,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:51:26,169 INFO L85 PathProgramCache]: Analyzing trace with hash 300941201, now seen corresponding path program 1 times [2021-11-03 04:51:26,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:51:26,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1578512129] [2021-11-03 04:51:26,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:51:26,171 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:51:26,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:51:26,171 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:51:26,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 04:51:28,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:51:28,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:51:28,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:51:28,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:28,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:28,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:28,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:28,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:28,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:51:28,241 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-03 04:51:28,241 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 04:51:28,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:51:28,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:51:28,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:51:28,545 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:51:28,546 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 04:51:29,629 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:51:29,629 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 04:51:29,805 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 04:51:29,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:51:30,509 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 04:51:30,510 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:51:30,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1578512129] [2021-11-03 04:51:30,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1578512129] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:51:30,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:51:30,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-03 04:51:30,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985657382] [2021-11-03 04:51:30,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:51:30,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:51:30,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:51:30,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:51:30,511 INFO L87 Difference]: Start difference. First operand 1224 states and 1873 transitions. Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 04:51:39,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:51:39,443 INFO L93 Difference]: Finished difference Result 2534 states and 3872 transitions. [2021-11-03 04:51:39,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:51:39,445 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 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 04:51:39,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:51:39,450 INFO L225 Difference]: With dead ends: 2534 [2021-11-03 04:51:39,451 INFO L226 Difference]: Without dead ends: 1333 [2021-11-03 04:51:39,452 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 248 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:51:39,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2021-11-03 04:51:39,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 1296. [2021-11-03 04:51:39,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1295 states have (on average 1.5250965250965252) internal successors, (1975), 1295 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states 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 04:51:39,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 1975 transitions. [2021-11-03 04:51:39,499 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 1975 transitions. Word has length 128 [2021-11-03 04:51:39,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:51:39,499 INFO L470 AbstractCegarLoop]: Abstraction has 1296 states and 1975 transitions. [2021-11-03 04:51:39,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 04:51:39,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 1975 transitions. [2021-11-03 04:51:39,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-03 04:51:39,502 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:51:39,502 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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 04:51:39,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-03 04:51:39,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:51:39,720 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:51:39,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:51:39,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1516123655, now seen corresponding path program 1 times [2021-11-03 04:51:39,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:51:39,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888889602] [2021-11-03 04:51:39,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:51:39,722 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:51:39,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:51:39,723 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:51:39,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 04:51:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:51:41,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:51:41,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:51:41,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:41,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:41,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:41,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:41,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:51:41,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:51:41,935 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 04:51:41,935 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 04:51:41,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:51:41,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:51:41,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:51:42,244 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:51:42,245 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 04:51:43,803 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:51:43,804 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 04:51:44,004 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-03 04:51:44,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:51:44,541 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-03 04:51:44,541 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:51:44,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888889602] [2021-11-03 04:51:44,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888889602] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:51:44,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:51:44,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:51:44,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015430218] [2021-11-03 04:51:44,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:51:44,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:51:44,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:51:44,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:51:44,542 INFO L87 Difference]: Start difference. First operand 1296 states and 1975 transitions. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states 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 04:52:23,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:23,657 INFO L93 Difference]: Finished difference Result 2995 states and 4525 transitions. [2021-11-03 04:52:23,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:52:23,658 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 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 139 [2021-11-03 04:52:23,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:23,665 INFO L225 Difference]: With dead ends: 2995 [2021-11-03 04:52:23,665 INFO L226 Difference]: Without dead ends: 1722 [2021-11-03 04:52:23,666 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 270 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 04:52:23,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2021-11-03 04:52:23,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 1386. [2021-11-03 04:52:23,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 1.5155234657039711) internal successors, (2099), 1385 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states 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 04:52:23,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 2099 transitions. [2021-11-03 04:52:23,722 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 2099 transitions. Word has length 139 [2021-11-03 04:52:23,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:23,723 INFO L470 AbstractCegarLoop]: Abstraction has 1386 states and 2099 transitions. [2021-11-03 04:52:23,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states 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 04:52:23,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 2099 transitions. [2021-11-03 04:52:23,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-03 04:52:23,725 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:23,726 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 04:52:23,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-03 04:52:23,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:23,943 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:52:23,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:23,944 INFO L85 PathProgramCache]: Analyzing trace with hash 863181925, now seen corresponding path program 1 times [2021-11-03 04:52:23,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:23,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1781191407] [2021-11-03 04:52:23,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:23,945 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:23,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:23,946 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:23,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-03 04:52:26,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:26,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:52:26,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:26,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:52:26,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:52:26,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:52:26,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:52:26,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:52:26,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:52:26,301 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 04:52:26,302 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 04:52:26,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:52:26,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:52:26,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:52:26,615 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:52:26,615 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 04:52:28,113 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:52:28,113 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 04:52:28,297 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-03 04:52:28,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:28,787 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-03 04:52:28,787 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:28,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1781191407] [2021-11-03 04:52:28,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1781191407] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:28,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:28,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:52:28,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612972139] [2021-11-03 04:52:28,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:52:28,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:28,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:52:28,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:52:28,789 INFO L87 Difference]: Start difference. First operand 1386 states and 2099 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 04:53:02,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:53:02,806 INFO L93 Difference]: Finished difference Result 3049 states and 4581 transitions. [2021-11-03 04:53:02,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:53:02,807 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 140 [2021-11-03 04:53:02,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:53:02,813 INFO L225 Difference]: With dead ends: 3049 [2021-11-03 04:53:02,813 INFO L226 Difference]: Without dead ends: 1686 [2021-11-03 04:53:02,815 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 272 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 04:53:02,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2021-11-03 04:53:02,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 1386. [2021-11-03 04:53:02,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 1.5032490974729242) internal successors, (2082), 1385 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states 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 04:53:02,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 2082 transitions. [2021-11-03 04:53:02,888 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 2082 transitions. Word has length 140 [2021-11-03 04:53:02,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:53:02,888 INFO L470 AbstractCegarLoop]: Abstraction has 1386 states and 2082 transitions. [2021-11-03 04:53:02,888 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 04:53:02,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 2082 transitions. [2021-11-03 04:53:02,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-03 04:53:02,891 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:53:02,891 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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 04:53:02,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-03 04:53:03,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:53:03,107 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:53:03,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:53:03,108 INFO L85 PathProgramCache]: Analyzing trace with hash 161595486, now seen corresponding path program 1 times [2021-11-03 04:53:03,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:53:03,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341694336] [2021-11-03 04:53:03,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:53:03,109 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:53:03,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:53:03,110 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:53:03,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82b9d069-d119-4a50-bd67-c9f370584dcd/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-03 04:53:05,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:53:05,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:53:05,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:53:05,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:53:05,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:53:05,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:53:05,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:53:05,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:53:05,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:53:05,611 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 04:53:05,612 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 04:53:05,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:53:05,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:53:05,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:53:05,984 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 04:53:05,984 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 04:53:07,404 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 04:53:07,404 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 04:53:07,599 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-03 04:53:07,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:53:08,082 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-03 04:53:08,082 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:53:08,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1341694336] [2021-11-03 04:53:08,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1341694336] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:53:08,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:53:08,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:53:08,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403240653] [2021-11-03 04:53:08,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:53:08,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:53:08,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:53:08,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:53:08,084 INFO L87 Difference]: Start difference. First operand 1386 states and 2082 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)