./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8 --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 f0dfbb8857f62702e453e52a8d4dce71a2bbeaa268873f608805c08e77bb3dfc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:22:00,473 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:22:00,476 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:22:00,536 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:22:00,537 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:22:00,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:22:00,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:22:00,547 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:22:00,550 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:22:00,557 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:22:00,558 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:22:00,560 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:22:00,560 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:22:00,563 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:22:00,565 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:22:00,566 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:22:00,567 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:22:00,568 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:22:00,570 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:22:00,573 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:22:00,574 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:22:00,576 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:22:00,577 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:22:00,578 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:22:00,582 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:22:00,582 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:22:00,583 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:22:00,584 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:22:00,584 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:22:00,585 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:22:00,586 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:22:00,587 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:22:00,587 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:22:00,588 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:22:00,589 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:22:00,590 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:22:00,591 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:22:00,591 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:22:00,591 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:22:00,593 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:22:00,593 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:22:00,594 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:22:00,624 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:22:00,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:22:00,625 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:22:00,625 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:22:00,625 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:22:00,626 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:22:00,626 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:22:00,626 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:22:00,626 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:22:00,626 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:22:00,627 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:22:00,627 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:22:00,627 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:22:00,627 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:22:00,627 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:22:00,628 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:22:00,628 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:22:00,629 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:22:00,629 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:22:00,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:22:00,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:22:00,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:22:00,630 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:22:00,630 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:22:00,630 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:22:00,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:22:00,630 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:22:00,631 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:22:00,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:22:00,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:22:00,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:22:00,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:22:00,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:22:00,632 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:22:00,632 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:22:00,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:22:00,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:22:00,633 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:22:00,633 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:22:00,633 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_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0dfbb8857f62702e453e52a8d4dce71a2bbeaa268873f608805c08e77bb3dfc [2021-11-07 01:22:00,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:22:00,939 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:22:00,941 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:22:00,945 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:22:00,946 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:22:00,947 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c [2021-11-07 01:22:01,025 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/data/08a14dac5/1d221da8671a41b4a91c1317e110de94/FLAGb51dd6d5d [2021-11-07 01:22:01,591 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:22:01,592 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c [2021-11-07 01:22:01,626 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/data/08a14dac5/1d221da8671a41b4a91c1317e110de94/FLAGb51dd6d5d [2021-11-07 01:22:02,029 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/data/08a14dac5/1d221da8671a41b4a91c1317e110de94 [2021-11-07 01:22:02,042 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:22:02,044 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:22:02,045 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:22:02,046 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:22:02,049 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:22:02,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:22:02" (1/1) ... [2021-11-07 01:22:02,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@150acbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:02, skipping insertion in model container [2021-11-07 01:22:02,051 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:22:02" (1/1) ... [2021-11-07 01:22:02,058 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:22:02,106 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:22:02,601 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_e03b38e5-fdf9-456e-b071-0dab8fd6e606/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c[74369,74382] [2021-11-07 01:22:02,611 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:22:02,627 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:22:02,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@76afc18a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:02, skipping insertion in model container [2021-11-07 01:22:02,628 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:22:02,628 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:22:02,630 INFO L168 Benchmark]: Toolchain (without parser) took 585.17 ms. Allocated memory was 92.3 MB in the beginning and 113.2 MB in the end (delta: 21.0 MB). Free memory was 53.9 MB in the beginning and 79.0 MB in the end (delta: -25.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:22:02,631 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 92.3 MB. Free memory was 73.0 MB in the beginning and 72.9 MB in the end (delta: 76.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:22:02,633 INFO L168 Benchmark]: CACSL2BoogieTranslator took 582.66 ms. Allocated memory was 92.3 MB in the beginning and 113.2 MB in the end (delta: 21.0 MB). Free memory was 53.6 MB in the beginning and 79.0 MB in the end (delta: -25.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:22:02,635 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 92.3 MB. Free memory was 73.0 MB in the beginning and 72.9 MB in the end (delta: 76.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 582.66 ms. Allocated memory was 92.3 MB in the beginning and 113.2 MB in the end (delta: 21.0 MB). Free memory was 53.6 MB in the beginning and 79.0 MB in the end (delta: -25.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 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_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8 --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 f0dfbb8857f62702e453e52a8d4dce71a2bbeaa268873f608805c08e77bb3dfc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:22:04,881 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:22:04,883 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:22:04,936 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:22:04,937 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:22:04,942 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:22:04,944 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:22:04,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:22:04,951 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:22:04,962 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:22:04,963 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:22:04,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:22:04,966 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:22:04,968 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:22:04,970 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:22:04,974 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:22:04,975 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:22:04,976 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:22:04,978 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:22:04,986 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:22:04,988 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:22:04,989 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:22:04,992 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:22:04,993 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:22:04,997 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:22:04,997 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:22:04,997 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:22:04,999 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:22:05,000 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:22:05,001 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:22:05,001 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:22:05,002 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:22:05,004 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:22:05,005 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:22:05,006 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:22:05,006 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:22:05,020 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:22:05,021 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:22:05,021 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:22:05,022 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:22:05,023 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:22:05,025 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:22:05,051 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:22:05,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:22:05,052 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:22:05,052 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:22:05,053 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:22:05,053 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:22:05,053 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:22:05,053 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:22:05,053 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:22:05,055 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:22:05,056 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:22:05,056 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:22:05,056 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:22:05,056 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:22:05,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:22:05,057 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:22:05,057 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:22:05,057 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:22:05,057 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:22:05,057 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:22:05,058 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:22:05,058 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:22:05,058 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:22:05,058 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:22:05,058 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:22:05,059 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:22:05,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:22:05,059 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:22:05,059 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:22:05,060 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:22:05,060 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:22:05,060 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:22:05,060 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:22:05,060 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:22:05,061 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:22:05,061 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_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0dfbb8857f62702e453e52a8d4dce71a2bbeaa268873f608805c08e77bb3dfc [2021-11-07 01:22:05,401 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:22:05,422 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:22:05,424 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:22:05,426 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:22:05,426 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:22:05,427 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c [2021-11-07 01:22:05,493 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/data/0ea2f2ff9/c575928e1222478a94b8925ac472443e/FLAG8677f501d [2021-11-07 01:22:06,182 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:22:06,183 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c [2021-11-07 01:22:06,213 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/data/0ea2f2ff9/c575928e1222478a94b8925ac472443e/FLAG8677f501d [2021-11-07 01:22:06,340 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/data/0ea2f2ff9/c575928e1222478a94b8925ac472443e [2021-11-07 01:22:06,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:22:06,349 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:22:06,351 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:22:06,351 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:22:06,355 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:22:06,355 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:22:06" (1/1) ... [2021-11-07 01:22:06,358 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22cc3186 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:06, skipping insertion in model container [2021-11-07 01:22:06,359 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:22:06" (1/1) ... [2021-11-07 01:22:06,366 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:22:06,442 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:22:06,958 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_e03b38e5-fdf9-456e-b071-0dab8fd6e606/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c[74369,74382] [2021-11-07 01:22:06,974 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:22:07,002 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:22:07,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:22:07,169 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_e03b38e5-fdf9-456e-b071-0dab8fd6e606/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c[74369,74382] [2021-11-07 01:22:07,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:22:07,186 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:22:07,298 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_e03b38e5-fdf9-456e-b071-0dab8fd6e606/sv-benchmarks/c/openssl/s3_srvr.blast.07.i.cil-1.c[74369,74382] [2021-11-07 01:22:07,301 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:22:07,331 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:22:07,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:07 WrapperNode [2021-11-07 01:22:07,331 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:22:07,332 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:22:07,332 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:22:07,333 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:22:07,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:07" (1/1) ... [2021-11-07 01:22:07,366 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:07" (1/1) ... [2021-11-07 01:22:07,405 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:22:07,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:22:07,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:22:07,407 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:22:07,415 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:07" (1/1) ... [2021-11-07 01:22:07,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:07" (1/1) ... [2021-11-07 01:22:07,425 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:07" (1/1) ... [2021-11-07 01:22:07,425 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:07" (1/1) ... [2021-11-07 01:22:07,496 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:07" (1/1) ... [2021-11-07 01:22:07,521 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:07" (1/1) ... [2021-11-07 01:22:07,524 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:07" (1/1) ... [2021-11-07 01:22:07,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:22:07,537 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:22:07,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:22:07,537 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:22:07,538 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:07" (1/1) ... [2021-11-07 01:22:07,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:22:07,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:22:07,569 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:22:07,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:22:07,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:22:07,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:22:07,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:22:07,627 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:22:07,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:22:07,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:22:07,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:22:07,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:22:07,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:22:07,925 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-07 01:22:17,012 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-07 01:22:17,013 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-07 01:22:17,021 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:22:17,021 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-07 01:22:17,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:22:17 BoogieIcfgContainer [2021-11-07 01:22:17,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:22:17,025 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:22:17,025 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:22:17,028 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:22:17,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:22:06" (1/3) ... [2021-11-07 01:22:17,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dc99042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:22:17, skipping insertion in model container [2021-11-07 01:22:17,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:22:07" (2/3) ... [2021-11-07 01:22:17,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dc99042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:22:17, skipping insertion in model container [2021-11-07 01:22:17,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:22:17" (3/3) ... [2021-11-07 01:22:17,031 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.07.i.cil-1.c [2021-11-07 01:22:17,036 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:22:17,037 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:22:17,098 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:22:17,104 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 [2021-11-07 01:22:17,105 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:22:17,123 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) [2021-11-07 01:22:17,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 01:22:17,136 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:17,137 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] [2021-11-07 01:22:17,137 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:17,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:17,148 INFO L85 PathProgramCache]: Analyzing trace with hash -442385418, now seen corresponding path program 1 times [2021-11-07 01:22:17,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:22:17,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [736894885] [2021-11-07 01:22:17,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:17,165 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:22:17,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:22:17,171 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:22:17,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:22:17,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:17,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:22:17,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:17,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:22:17,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:22:18,004 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:22:18,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [736894885] [2021-11-07 01:22:18,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [736894885] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:18,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:18,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:22:18,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079726223] [2021-11-07 01:22:18,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:22:18,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:22:18,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:22:18,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:22:18,027 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 4 states, 4 states have (on average 17.5) internal successors, (70), 4 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) [2021-11-07 01:22:18,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:18,261 INFO L93 Difference]: Finished difference Result 566 states and 965 transitions. [2021-11-07 01:22:18,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:22:18,263 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 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 37 [2021-11-07 01:22:18,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:18,277 INFO L225 Difference]: With dead ends: 566 [2021-11-07 01:22:18,277 INFO L226 Difference]: Without dead ends: 387 [2021-11-07 01:22:18,281 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:22:18,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-07 01:22:18,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 385. [2021-11-07 01:22:18,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.5286458333333333) internal successors, (587), 384 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:18,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 587 transitions. [2021-11-07 01:22:18,352 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 587 transitions. Word has length 37 [2021-11-07 01:22:18,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:18,353 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 587 transitions. [2021-11-07 01:22:18,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 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) [2021-11-07 01:22:18,354 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 587 transitions. [2021-11-07 01:22:18,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:22:18,360 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:18,360 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] [2021-11-07 01:22:18,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 01:22:18,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:22:18,573 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:18,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:18,574 INFO L85 PathProgramCache]: Analyzing trace with hash 746604405, now seen corresponding path program 1 times [2021-11-07 01:22:18,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:22:18,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2017720907] [2021-11-07 01:22:18,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:18,576 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:22:18,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:22:18,577 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:22:18,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:22:18,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:18,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:22:18,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:19,153 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:22:19,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:19,399 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:22:19,399 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:22:19,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2017720907] [2021-11-07 01:22:19,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2017720907] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:19,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:19,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:22:19,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365645537] [2021-11-07 01:22:19,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:22:19,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:22:19,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:22:19,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:22:19,403 INFO L87 Difference]: Start difference. First operand 385 states and 587 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:19,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:19,950 INFO L93 Difference]: Finished difference Result 882 states and 1357 transitions. [2021-11-07 01:22:19,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:22:19,951 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 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 [2021-11-07 01:22:19,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:19,956 INFO L225 Difference]: With dead ends: 882 [2021-11-07 01:22:19,956 INFO L226 Difference]: Without dead ends: 631 [2021-11-07 01:22:19,959 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:22:19,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-11-07 01:22:19,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 629. [2021-11-07 01:22:19,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 1.5222929936305734) internal successors, (956), 628 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:20,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 956 transitions. [2021-11-07 01:22:20,029 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 956 transitions. Word has length 60 [2021-11-07 01:22:20,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:20,030 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 956 transitions. [2021-11-07 01:22:20,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:20,030 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 956 transitions. [2021-11-07 01:22:20,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-07 01:22:20,039 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:20,039 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:22:20,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:22:20,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:22:20,248 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:20,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:20,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1749353389, now seen corresponding path program 1 times [2021-11-07 01:22:20,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:22:20,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [861806634] [2021-11-07 01:22:20,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:20,252 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:22:20,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:22:20,253 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:22:20,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:22:20,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:20,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:22:20,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:21,057 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:22:21,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:21,480 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:22:21,480 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:22:21,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [861806634] [2021-11-07 01:22:21,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [861806634] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:21,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:21,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:22:21,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236781041] [2021-11-07 01:22:21,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:22:21,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:22:21,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:22:21,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:22:21,489 INFO L87 Difference]: Start difference. First operand 629 states and 956 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 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) [2021-11-07 01:22:22,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:22,173 INFO L93 Difference]: Finished difference Result 1244 states and 1900 transitions. [2021-11-07 01:22:22,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:22:22,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 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 119 [2021-11-07 01:22:22,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:22,179 INFO L225 Difference]: With dead ends: 1244 [2021-11-07 01:22:22,179 INFO L226 Difference]: Without dead ends: 749 [2021-11-07 01:22:22,181 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:22:22,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-11-07 01:22:22,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2021-11-07 01:22:22,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 1.518716577540107) internal successors, (1136), 748 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:22,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1136 transitions. [2021-11-07 01:22:22,213 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1136 transitions. Word has length 119 [2021-11-07 01:22:22,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:22,213 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 1136 transitions. [2021-11-07 01:22:22,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 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) [2021-11-07 01:22:22,214 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1136 transitions. [2021-11-07 01:22:22,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-07 01:22:22,220 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:22,221 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:22:22,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-07 01:22:22,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:22:22,433 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:22,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:22,434 INFO L85 PathProgramCache]: Analyzing trace with hash 433077792, now seen corresponding path program 1 times [2021-11-07 01:22:22,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:22:22,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051002445] [2021-11-07 01:22:22,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:22,435 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:22:22,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:22:22,437 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:22:22,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:22:22,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:22,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:22:22,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:23,394 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-07 01:22:23,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:23,830 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-07 01:22:23,831 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:22:23,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051002445] [2021-11-07 01:22:23,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051002445] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:23,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:23,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:22:23,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125192184] [2021-11-07 01:22:23,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:22:23,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:22:23,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:22:23,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:22:23,833 INFO L87 Difference]: Start difference. First operand 749 states and 1136 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:24,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:24,256 INFO L93 Difference]: Finished difference Result 1611 states and 2457 transitions. [2021-11-07 01:22:24,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:22:24,257 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-07 01:22:24,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:24,264 INFO L225 Difference]: With dead ends: 1611 [2021-11-07 01:22:24,264 INFO L226 Difference]: Without dead ends: 996 [2021-11-07 01:22:24,265 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:22:24,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-11-07 01:22:24,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 996. [2021-11-07 01:22:24,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 1.5155778894472363) internal successors, (1508), 995 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:24,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1508 transitions. [2021-11-07 01:22:24,305 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1508 transitions. Word has length 143 [2021-11-07 01:22:24,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:24,306 INFO L470 AbstractCegarLoop]: Abstraction has 996 states and 1508 transitions. [2021-11-07 01:22:24,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:24,306 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1508 transitions. [2021-11-07 01:22:24,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-07 01:22:24,310 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:24,310 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, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 01:22:24,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:22:24,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:22:24,526 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:24,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:24,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1349783187, now seen corresponding path program 1 times [2021-11-07 01:22:24,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:22:24,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1759180678] [2021-11-07 01:22:24,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:24,529 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:22:24,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:22:24,530 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:22:24,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:22:25,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:25,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:22:25,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:25,551 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-07 01:22:25,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-07 01:22:26,009 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:22:26,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1759180678] [2021-11-07 01:22:26,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1759180678] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:26,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:26,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:22:26,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020067319] [2021-11-07 01:22:26,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:22:26,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:22:26,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:22:26,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:22:26,016 INFO L87 Difference]: Start difference. First operand 996 states and 1508 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:26,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:26,714 INFO L93 Difference]: Finished difference Result 2102 states and 3195 transitions. [2021-11-07 01:22:26,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:22:26,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 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 165 [2021-11-07 01:22:26,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:26,723 INFO L225 Difference]: With dead ends: 2102 [2021-11-07 01:22:26,723 INFO L226 Difference]: Without dead ends: 1240 [2021-11-07 01:22:26,725 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:22:26,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-11-07 01:22:26,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1240. [2021-11-07 01:22:26,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1239 states have (on average 1.5125100887812752) internal successors, (1874), 1239 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:26,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1874 transitions. [2021-11-07 01:22:26,786 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1874 transitions. Word has length 165 [2021-11-07 01:22:26,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:26,787 INFO L470 AbstractCegarLoop]: Abstraction has 1240 states and 1874 transitions. [2021-11-07 01:22:26,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:26,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1874 transitions. [2021-11-07 01:22:26,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-07 01:22:26,791 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:26,792 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:22:26,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:22:27,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:22:27,005 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:27,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:27,006 INFO L85 PathProgramCache]: Analyzing trace with hash -381805375, now seen corresponding path program 1 times [2021-11-07 01:22:27,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:22:27,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [511552503] [2021-11-07 01:22:27,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:27,012 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:22:27,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:22:27,014 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:22:27,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:22:28,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:22:28,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 01:22:28,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:22:28,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:22:28,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:22:28,391 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:28,395 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-07 01:22:28,407 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:28,414 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-07 01:22:28,454 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 [2021-11-07 01:22:28,938 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-07 01:22:28,939 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 [2021-11-07 01:22:29,006 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:29,010 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-07 01:22:29,015 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:29,023 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-07 01:22:29,035 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 [2021-11-07 01:22:29,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,181 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 97 treesize of output 49 [2021-11-07 01:22:29,289 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-07 01:22:29,289 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 [2021-11-07 01:22:29,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:22:29,323 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 [2021-11-07 01:22:29,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-07 01:22:29,366 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 [2021-11-07 01:22:29,880 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-07 01:22:29,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:22:30,507 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:30,511 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-07 01:22:30,516 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:30,519 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-07 01:22:30,672 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:30,674 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-07 01:22:30,681 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:30,684 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-07 01:22:30,694 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:30,702 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-07 01:22:30,718 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:30,722 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-07 01:22:30,744 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:30,748 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-07 01:22:30,779 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:22:30,783 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-07 01:22:31,324 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-07 01:22:31,324 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:22:31,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [511552503] [2021-11-07 01:22:31,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [511552503] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:22:31,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:22:31,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:22:31,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103123567] [2021-11-07 01:22:31,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:22:31,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:22:31,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:22:31,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:22:31,328 INFO L87 Difference]: Start difference. First operand 1240 states and 1874 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:59,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:22:59,361 INFO L93 Difference]: Finished difference Result 2477 states and 3744 transitions. [2021-11-07 01:22:59,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:22:59,363 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 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 172 [2021-11-07 01:22:59,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:22:59,370 INFO L225 Difference]: With dead ends: 2477 [2021-11-07 01:22:59,371 INFO L226 Difference]: Without dead ends: 1240 [2021-11-07 01:22:59,373 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 335 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:22:59,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-11-07 01:22:59,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1240. [2021-11-07 01:22:59,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1239 states have (on average 1.5117029862792575) internal successors, (1873), 1239 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) [2021-11-07 01:22:59,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1873 transitions. [2021-11-07 01:22:59,419 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1873 transitions. Word has length 172 [2021-11-07 01:22:59,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:22:59,419 INFO L470 AbstractCegarLoop]: Abstraction has 1240 states and 1873 transitions. [2021-11-07 01:22:59,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:22:59,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1873 transitions. [2021-11-07 01:22:59,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-07 01:22:59,424 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:22:59,424 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:22:59,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:22:59,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:22:59,641 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:22:59,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:22:59,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1884903681, now seen corresponding path program 1 times [2021-11-07 01:22:59,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:22:59,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2058304191] [2021-11-07 01:22:59,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:22:59,643 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:22:59,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:22:59,643 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:22:59,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:23:00,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:23:00,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:23:00,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:23:00,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:23:00,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:23:00,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:23:00,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:23:00,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:23:00,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:23:00,910 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 01:23:00,910 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 [2021-11-07 01:23:00,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:23:00,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:23:00,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:23:01,297 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 01:23:01,298 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 [2021-11-07 01:23:02,533 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:23:02,533 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 [2021-11-07 01:23:02,858 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-07 01:23:02,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:23:03,466 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-07 01:23:03,466 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:23:03,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2058304191] [2021-11-07 01:23:03,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2058304191] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:23:03,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:23:03,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:23:03,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316161723] [2021-11-07 01:23:03,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:23:03,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:23:03,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:23:03,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:23:03,469 INFO L87 Difference]: Start difference. First operand 1240 states and 1873 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) [2021-11-07 01:23:58,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:23:58,618 INFO L93 Difference]: Finished difference Result 4654 states and 7069 transitions. [2021-11-07 01:23:58,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:23:58,619 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 172 [2021-11-07 01:23:58,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:23:58,642 INFO L225 Difference]: With dead ends: 4654 [2021-11-07 01:23:58,642 INFO L226 Difference]: Without dead ends: 3424 [2021-11-07 01:23:58,645 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 336 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:23:58,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3424 states. [2021-11-07 01:23:58,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3424 to 1489. [2021-11-07 01:23:58,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 1488 states have (on average 1.5470430107526882) internal successors, (2302), 1488 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:23:58,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 2302 transitions. [2021-11-07 01:23:58,781 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 2302 transitions. Word has length 172 [2021-11-07 01:23:58,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:23:58,781 INFO L470 AbstractCegarLoop]: Abstraction has 1489 states and 2302 transitions. [2021-11-07 01:23:58,782 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) [2021-11-07 01:23:58,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 2302 transitions. [2021-11-07 01:23:58,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-07 01:23:58,787 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:23:58,787 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:23:58,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:23:59,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:23:59,011 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:23:59,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:23:59,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1462011649, now seen corresponding path program 1 times [2021-11-07 01:23:59,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:23:59,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2072329272] [2021-11-07 01:23:59,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:23:59,012 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:23:59,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:23:59,013 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:23:59,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:24:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:00,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:24:00,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:00,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:00,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:00,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:00,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:00,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:00,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:00,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:00,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:00,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:00,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:00,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:00,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:00,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:00,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:24:00,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:24:00,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:24:00,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:24:00,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:24:00,899 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:24:00,899 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 [2021-11-07 01:24:02,468 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:24:02,468 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 [2021-11-07 01:24:02,637 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-07 01:24:02,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:03,234 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-07 01:24:03,234 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:03,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2072329272] [2021-11-07 01:24:03,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2072329272] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:03,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:03,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:24:03,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967133332] [2021-11-07 01:24:03,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:24:03,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:03,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:24:03,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:24:03,236 INFO L87 Difference]: Start difference. First operand 1489 states and 2302 transitions. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:22,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:24:22,159 INFO L93 Difference]: Finished difference Result 3604 states and 5571 transitions. [2021-11-07 01:24:22,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:24:22,165 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 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 172 [2021-11-07 01:24:22,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:24:22,177 INFO L225 Difference]: With dead ends: 3604 [2021-11-07 01:24:22,177 INFO L226 Difference]: Without dead ends: 2125 [2021-11-07 01:24:22,180 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 338 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:24:22,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2125 states. [2021-11-07 01:24:22,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2125 to 1769. [2021-11-07 01:24:22,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1769 states, 1768 states have (on average 1.579185520361991) internal successors, (2792), 1768 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:22,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 2792 transitions. [2021-11-07 01:24:22,295 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 2792 transitions. Word has length 172 [2021-11-07 01:24:22,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:24:22,295 INFO L470 AbstractCegarLoop]: Abstraction has 1769 states and 2792 transitions. [2021-11-07 01:24:22,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:24:22,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 2792 transitions. [2021-11-07 01:24:22,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-07 01:24:22,300 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:24:22,301 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:24:22,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:24:22,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:24:22,521 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:24:22,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:24:22,522 INFO L85 PathProgramCache]: Analyzing trace with hash 991422329, now seen corresponding path program 1 times [2021-11-07 01:24:22,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:24:22,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959209912] [2021-11-07 01:24:22,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:24:22,523 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:24:22,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:24:22,524 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:24:22,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:24:24,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:24:24,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:24:24,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:24:24,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:24,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:24,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:24,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:24,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:24,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:24,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:24,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:24,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:24,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:24,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:24,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:24,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:24:24,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:24:24,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:24:24,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:24:24,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:24:24,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:24:24,701 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:24:24,702 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 [2021-11-07 01:24:25,495 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:24:25,495 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 [2021-11-07 01:24:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:24:25,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:24:26,200 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:24:26,201 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:24:26,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959209912] [2021-11-07 01:24:26,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959209912] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:24:26,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:24:26,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:24:26,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231796741] [2021-11-07 01:24:26,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:24:26,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:24:26,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:24:26,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:24:26,210 INFO L87 Difference]: Start difference. First operand 1769 states and 2792 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 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) [2021-11-07 01:25:04,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:04,056 INFO L93 Difference]: Finished difference Result 5243 states and 8185 transitions. [2021-11-07 01:25:04,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:25:04,067 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 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 185 [2021-11-07 01:25:04,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:04,088 INFO L225 Difference]: With dead ends: 5243 [2021-11-07 01:25:04,089 INFO L226 Difference]: Without dead ends: 3484 [2021-11-07 01:25:04,092 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:25:04,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3484 states. [2021-11-07 01:25:04,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3484 to 2073. [2021-11-07 01:25:04,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2073 states, 2072 states have (on average 1.5810810810810811) internal successors, (3276), 2072 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:04,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2073 states to 2073 states and 3276 transitions. [2021-11-07 01:25:04,267 INFO L78 Accepts]: Start accepts. Automaton has 2073 states and 3276 transitions. Word has length 185 [2021-11-07 01:25:04,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:04,268 INFO L470 AbstractCegarLoop]: Abstraction has 2073 states and 3276 transitions. [2021-11-07 01:25:04,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 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) [2021-11-07 01:25:04,268 INFO L276 IsEmpty]: Start isEmpty. Operand 2073 states and 3276 transitions. [2021-11-07 01:25:04,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-07 01:25:04,274 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:04,275 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:25:04,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:04,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:04,489 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:04,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:04,489 INFO L85 PathProgramCache]: Analyzing trace with hash -503738714, now seen corresponding path program 1 times [2021-11-07 01:25:04,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:04,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [274979749] [2021-11-07 01:25:04,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:04,491 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:04,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:04,493 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:04,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:25:06,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:06,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:25:06,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:06,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:06,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:06,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:06,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:06,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:06,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:06,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:06,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:06,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:06,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:06,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:06,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:06,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:06,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:25:06,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:25:06,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:25:06,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:25:06,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:25:07,283 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:25:07,284 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 [2021-11-07 01:25:07,747 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:25:07,747 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 [2021-11-07 01:25:08,049 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:25:08,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:08,685 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:25:08,685 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:08,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [274979749] [2021-11-07 01:25:08,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [274979749] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:08,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:08,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:25:08,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474033322] [2021-11-07 01:25:08,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:25:08,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:08,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:25:08,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:25:08,688 INFO L87 Difference]: Start difference. First operand 2073 states and 3276 transitions. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:49,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:25:49,416 INFO L93 Difference]: Finished difference Result 5687 states and 8880 transitions. [2021-11-07 01:25:49,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:25:49,425 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 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 186 [2021-11-07 01:25:49,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:25:49,451 INFO L225 Difference]: With dead ends: 5687 [2021-11-07 01:25:49,451 INFO L226 Difference]: Without dead ends: 3624 [2021-11-07 01:25:49,455 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:25:49,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3624 states. [2021-11-07 01:25:49,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3624 to 2183. [2021-11-07 01:25:49,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2183 states, 2182 states have (on average 1.5614115490375802) internal successors, (3407), 2182 states have internal predecessors, (3407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:49,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2183 states to 2183 states and 3407 transitions. [2021-11-07 01:25:49,679 INFO L78 Accepts]: Start accepts. Automaton has 2183 states and 3407 transitions. Word has length 186 [2021-11-07 01:25:49,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:25:49,680 INFO L470 AbstractCegarLoop]: Abstraction has 2183 states and 3407 transitions. [2021-11-07 01:25:49,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:25:49,681 INFO L276 IsEmpty]: Start isEmpty. Operand 2183 states and 3407 transitions. [2021-11-07 01:25:49,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-07 01:25:49,688 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:25:49,688 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:25:49,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:25:49,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:25:49,913 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:25:49,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:25:49,913 INFO L85 PathProgramCache]: Analyzing trace with hash 790677906, now seen corresponding path program 1 times [2021-11-07 01:25:49,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:25:49,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [242005811] [2021-11-07 01:25:49,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:25:49,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:25:49,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:25:49,917 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:25:49,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:25:52,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:25:52,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:25:52,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:25:52,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:52,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:52,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:52,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:52,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:52,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:52,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:52,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:52,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:52,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:52,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:52,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:52,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:25:52,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:25:52,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:25:52,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:25:52,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:25:52,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:25:52,869 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:25:52,870 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 [2021-11-07 01:25:53,450 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:25:53,450 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 [2021-11-07 01:25:53,742 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:25:53,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:25:54,316 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:25:54,316 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:25:54,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [242005811] [2021-11-07 01:25:54,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [242005811] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:25:54,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:25:54,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:25:54,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965400201] [2021-11-07 01:25:54,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:25:54,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:25:54,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:25:54,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:25:54,319 INFO L87 Difference]: Start difference. First operand 2183 states and 3407 transitions. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:43,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:43,271 INFO L93 Difference]: Finished difference Result 6027 states and 9312 transitions. [2021-11-07 01:26:43,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:26:43,272 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 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 186 [2021-11-07 01:26:43,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:43,296 INFO L225 Difference]: With dead ends: 6027 [2021-11-07 01:26:43,296 INFO L226 Difference]: Without dead ends: 3854 [2021-11-07 01:26:43,309 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:26:43,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3854 states. [2021-11-07 01:26:43,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3854 to 2553. [2021-11-07 01:26:43,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2553 states, 2552 states have (on average 1.5352664576802508) internal successors, (3918), 2552 states have internal predecessors, (3918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:43,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2553 states to 2553 states and 3918 transitions. [2021-11-07 01:26:43,542 INFO L78 Accepts]: Start accepts. Automaton has 2553 states and 3918 transitions. Word has length 186 [2021-11-07 01:26:43,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:43,543 INFO L470 AbstractCegarLoop]: Abstraction has 2553 states and 3918 transitions. [2021-11-07 01:26:43,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:26:43,543 INFO L276 IsEmpty]: Start isEmpty. Operand 2553 states and 3918 transitions. [2021-11-07 01:26:43,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-07 01:26:43,581 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:43,581 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:26:43,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:43,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:26:43,787 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:43,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:43,788 INFO L85 PathProgramCache]: Analyzing trace with hash 2111383387, now seen corresponding path program 1 times [2021-11-07 01:26:43,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:43,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1335058704] [2021-11-07 01:26:43,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:43,791 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:43,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:43,793 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:43,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:26:45,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:46,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:26:46,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:46,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:46,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:46,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:46,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:46,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:46,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:46,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:46,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:46,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:46,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:46,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:46,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:46,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:26:46,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:26:46,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:26:46,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:26:46,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:26:46,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:26:46,735 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:26:46,736 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 [2021-11-07 01:26:47,725 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:26:47,725 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 [2021-11-07 01:26:48,005 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:26:48,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:48,599 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:26:48,599 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:48,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1335058704] [2021-11-07 01:26:48,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1335058704] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:48,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:48,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:26:48,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885433758] [2021-11-07 01:26:48,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:26:48,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:48,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:26:48,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:26:48,601 INFO L87 Difference]: Start difference. First operand 2553 states and 3918 transitions. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:24,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:24,976 INFO L93 Difference]: Finished difference Result 6397 states and 9744 transitions. [2021-11-07 01:27:24,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:27:24,978 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 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 186 [2021-11-07 01:27:24,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:25,004 INFO L225 Difference]: With dead ends: 6397 [2021-11-07 01:27:25,004 INFO L226 Difference]: Without dead ends: 3854 [2021-11-07 01:27:25,008 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:27:25,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3854 states. [2021-11-07 01:27:25,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3854 to 2571. [2021-11-07 01:27:25,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2571 states, 2570 states have (on average 1.527237354085603) internal successors, (3925), 2570 states have internal predecessors, (3925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:25,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2571 states to 2571 states and 3925 transitions. [2021-11-07 01:27:25,262 INFO L78 Accepts]: Start accepts. Automaton has 2571 states and 3925 transitions. Word has length 186 [2021-11-07 01:27:25,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:25,262 INFO L470 AbstractCegarLoop]: Abstraction has 2571 states and 3925 transitions. [2021-11-07 01:27:25,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:27:25,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2571 states and 3925 transitions. [2021-11-07 01:27:25,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-07 01:27:25,271 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:25,272 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:25,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:25,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:25,489 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:27:25,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:25,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1645926757, now seen corresponding path program 1 times [2021-11-07 01:27:25,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:25,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [814777309] [2021-11-07 01:27:25,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:25,492 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:25,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:25,494 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:25,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:27:27,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:27,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:27:27,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:28,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:28,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:28,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:28,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:28,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:28,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:28,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:28,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:28,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:28,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:28,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:28,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:28,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:27:28,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:27:28,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:27:28,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:27:28,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:27:28,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:27:28,680 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:27:28,680 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 [2021-11-07 01:27:29,615 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:27:29,615 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 [2021-11-07 01:27:29,876 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:27:29,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:30,513 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:27:30,513 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:30,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [814777309] [2021-11-07 01:27:30,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [814777309] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:30,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:27:30,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:27:30,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458418317] [2021-11-07 01:27:30,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:27:30,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:30,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:27:30,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:27:30,515 INFO L87 Difference]: Start difference. First operand 2571 states and 3925 transitions. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:05,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:28:05,258 INFO L93 Difference]: Finished difference Result 6740 states and 10246 transitions. [2021-11-07 01:28:05,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:28:05,260 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 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 186 [2021-11-07 01:28:05,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:28:05,276 INFO L225 Difference]: With dead ends: 6740 [2021-11-07 01:28:05,277 INFO L226 Difference]: Without dead ends: 4179 [2021-11-07 01:28:05,280 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:28:05,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4179 states. [2021-11-07 01:28:05,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4179 to 2766. [2021-11-07 01:28:05,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2766 states, 2765 states have (on average 1.5236889692585895) internal successors, (4213), 2765 states have internal predecessors, (4213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:05,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2766 states to 2766 states and 4213 transitions. [2021-11-07 01:28:05,570 INFO L78 Accepts]: Start accepts. Automaton has 2766 states and 4213 transitions. Word has length 186 [2021-11-07 01:28:05,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:28:05,571 INFO L470 AbstractCegarLoop]: Abstraction has 2766 states and 4213 transitions. [2021-11-07 01:28:05,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:05,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2766 states and 4213 transitions. [2021-11-07 01:28:05,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-07 01:28:05,606 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:28:05,606 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:28:05,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 01:28:05,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:28:05,807 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:28:05,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:28:05,808 INFO L85 PathProgramCache]: Analyzing trace with hash -855064592, now seen corresponding path program 1 times [2021-11-07 01:28:05,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:28:05,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [788003417] [2021-11-07 01:28:05,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:05,810 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:28:05,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:28:05,810 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:28:05,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:28:08,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:08,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:28:08,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:08,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:08,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:08,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:08,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:08,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:08,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:08,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:08,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:08,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:08,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:08,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:08,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:08,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:08,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:28:08,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:28:08,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:28:08,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:28:08,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:28:09,456 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:28:09,457 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 [2021-11-07 01:28:10,106 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:28:10,106 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 [2021-11-07 01:28:10,400 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:28:10,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:10,988 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:28:10,988 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:28:10,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [788003417] [2021-11-07 01:28:10,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [788003417] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:28:10,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:28:10,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:28:10,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264052071] [2021-11-07 01:28:10,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:28:10,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:28:10,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:28:10,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:28:10,992 INFO L87 Difference]: Start difference. First operand 2766 states and 4213 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 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) [2021-11-07 01:28:51,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:28:51,399 INFO L93 Difference]: Finished difference Result 7150 states and 10834 transitions. [2021-11-07 01:28:51,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:28:51,401 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 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 187 [2021-11-07 01:28:51,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:28:51,412 INFO L225 Difference]: With dead ends: 7150 [2021-11-07 01:28:51,412 INFO L226 Difference]: Without dead ends: 4394 [2021-11-07 01:28:51,415 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:28:51,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4394 states. [2021-11-07 01:28:51,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4394 to 2903. [2021-11-07 01:28:51,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2903 states, 2902 states have (on average 1.5006891798759476) internal successors, (4355), 2902 states have internal predecessors, (4355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:28:51,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 4355 transitions. [2021-11-07 01:28:51,648 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 4355 transitions. Word has length 187 [2021-11-07 01:28:51,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:28:51,649 INFO L470 AbstractCegarLoop]: Abstraction has 2903 states and 4355 transitions. [2021-11-07 01:28:51,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 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) [2021-11-07 01:28:51,649 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 4355 transitions. [2021-11-07 01:28:51,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-07 01:28:51,658 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:28:51,658 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:28:51,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:51,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:28:51,873 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:28:51,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:28:51,873 INFO L85 PathProgramCache]: Analyzing trace with hash -711546899, now seen corresponding path program 1 times [2021-11-07 01:28:51,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:28:51,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1153201246] [2021-11-07 01:28:51,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:51,875 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:28:51,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:28:51,876 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:28:51,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:28:54,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:54,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:28:54,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:54,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:54,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:54,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:54,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:54,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:54,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:54,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:54,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:54,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:54,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:54,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:54,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:54,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:28:54,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:28:54,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:28:54,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:28:54,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:28:54,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:28:55,148 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:28:55,149 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 [2021-11-07 01:28:55,829 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:28:55,829 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 [2021-11-07 01:28:56,169 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:28:56,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:56,905 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:28:56,906 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:28:56,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1153201246] [2021-11-07 01:28:56,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1153201246] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:28:56,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:28:56,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:28:56,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041870760] [2021-11-07 01:28:56,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:28:56,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:28:56,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:28:56,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:28:56,911 INFO L87 Difference]: Start difference. First operand 2903 states and 4355 transitions. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 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) [2021-11-07 01:29:30,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:30,644 INFO L93 Difference]: Finished difference Result 7158 states and 10724 transitions. [2021-11-07 01:29:30,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:29:30,646 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 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 188 [2021-11-07 01:29:30,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:30,657 INFO L225 Difference]: With dead ends: 7158 [2021-11-07 01:29:30,657 INFO L226 Difference]: Without dead ends: 4265 [2021-11-07 01:29:30,661 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:29:30,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4265 states. [2021-11-07 01:29:30,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4265 to 2912. [2021-11-07 01:29:30,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2912 states, 2911 states have (on average 1.4788732394366197) internal successors, (4305), 2911 states have internal predecessors, (4305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:30,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2912 states to 2912 states and 4305 transitions. [2021-11-07 01:29:30,914 INFO L78 Accepts]: Start accepts. Automaton has 2912 states and 4305 transitions. Word has length 188 [2021-11-07 01:29:30,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:30,915 INFO L470 AbstractCegarLoop]: Abstraction has 2912 states and 4305 transitions. [2021-11-07 01:29:30,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 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) [2021-11-07 01:29:30,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2912 states and 4305 transitions. [2021-11-07 01:29:30,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-07 01:29:30,922 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:30,922 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:29:30,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:31,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:31,141 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:29:31,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:31,142 INFO L85 PathProgramCache]: Analyzing trace with hash -935538133, now seen corresponding path program 1 times [2021-11-07 01:29:31,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:31,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [672431275] [2021-11-07 01:29:31,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:31,144 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:31,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:31,144 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:31,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:29:33,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:33,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:29:33,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:33,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:29:33,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:29:33,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:29:33,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:29:33,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:29:33,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:29:33,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:29:33,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:29:33,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:29:33,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:29:33,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:29:33,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:29:33,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:29:33,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:29:33,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:29:33,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:29:33,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:29:33,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:29:34,401 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:29:34,402 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 [2021-11-07 01:29:35,156 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:29:35,156 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 [2021-11-07 01:29:35,420 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:29:35,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:36,022 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:29:36,022 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:36,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [672431275] [2021-11-07 01:29:36,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [672431275] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:36,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:36,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:29:36,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845148517] [2021-11-07 01:29:36,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:29:36,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:36,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:29:36,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:29:36,024 INFO L87 Difference]: Start difference. First operand 2912 states and 4305 transitions. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:14,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:14,333 INFO L93 Difference]: Finished difference Result 7055 states and 10469 transitions. [2021-11-07 01:30:14,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:30:14,335 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 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 189 [2021-11-07 01:30:14,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:14,346 INFO L225 Difference]: With dead ends: 7055 [2021-11-07 01:30:14,346 INFO L226 Difference]: Without dead ends: 4153 [2021-11-07 01:30:14,349 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:30:14,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4153 states. [2021-11-07 01:30:14,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4153 to 2882. [2021-11-07 01:30:14,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2882 states, 2881 states have (on average 1.463727872266574) internal successors, (4217), 2881 states have internal predecessors, (4217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:14,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2882 states to 2882 states and 4217 transitions. [2021-11-07 01:30:14,619 INFO L78 Accepts]: Start accepts. Automaton has 2882 states and 4217 transitions. Word has length 189 [2021-11-07 01:30:14,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:14,620 INFO L470 AbstractCegarLoop]: Abstraction has 2882 states and 4217 transitions. [2021-11-07 01:30:14,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:14,620 INFO L276 IsEmpty]: Start isEmpty. Operand 2882 states and 4217 transitions. [2021-11-07 01:30:14,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-07 01:30:14,626 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:14,626 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:14,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:14,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:14,841 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:14,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:14,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1463772801, now seen corresponding path program 1 times [2021-11-07 01:30:14,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:14,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1390287710] [2021-11-07 01:30:14,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:14,844 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:14,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:14,846 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:14,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:30:17,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:17,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:30:17,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:17,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:30:17,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:30:17,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:30:17,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:30:17,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:30:17,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:30:17,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:30:17,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:30:17,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:30:17,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:30:17,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:30:17,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:30:17,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:30:17,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:30:17,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:30:17,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:30:17,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:30:17,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:30:18,307 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:30:18,308 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 [2021-11-07 01:30:19,327 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:30:19,328 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 [2021-11-07 01:30:19,579 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:30:19,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:30:20,208 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:20,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1390287710] [2021-11-07 01:30:20,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1390287710] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:20,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:20,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:30:20,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433541026] [2021-11-07 01:30:20,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:30:20,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:20,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:30:20,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:30:20,218 INFO L87 Difference]: Start difference. First operand 2882 states and 4217 transitions. Second operand has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:03,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:03,970 INFO L93 Difference]: Finished difference Result 6866 states and 10073 transitions. [2021-11-07 01:31:03,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:31:03,972 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 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 189 [2021-11-07 01:31:03,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:03,980 INFO L225 Difference]: With dead ends: 6866 [2021-11-07 01:31:03,980 INFO L226 Difference]: Without dead ends: 4285 [2021-11-07 01:31:03,983 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:31:03,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4285 states. [2021-11-07 01:31:04,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4285 to 3081. [2021-11-07 01:31:04,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3081 states, 3080 states have (on average 1.4467532467532467) internal successors, (4456), 3080 states have internal predecessors, (4456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:04,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3081 states to 3081 states and 4456 transitions. [2021-11-07 01:31:04,285 INFO L78 Accepts]: Start accepts. Automaton has 3081 states and 4456 transitions. Word has length 189 [2021-11-07 01:31:04,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:04,285 INFO L470 AbstractCegarLoop]: Abstraction has 3081 states and 4456 transitions. [2021-11-07 01:31:04,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.0) internal successors, (138), 6 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:04,286 INFO L276 IsEmpty]: Start isEmpty. Operand 3081 states and 4456 transitions. [2021-11-07 01:31:04,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-07 01:31:04,291 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:04,292 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:04,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:04,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:04,513 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:31:04,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:04,513 INFO L85 PathProgramCache]: Analyzing trace with hash -70761122, now seen corresponding path program 1 times [2021-11-07 01:31:04,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:04,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901830007] [2021-11-07 01:31:04,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:04,516 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:04,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:04,518 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:04,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:31:07,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:07,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:31:07,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:07,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:07,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:07,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:07,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:07,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:07,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:07,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:07,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:07,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:07,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:07,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:07,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:07,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:07,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:31:07,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:31:07,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:31:07,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:31:07,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:31:07,785 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:31:07,786 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 [2021-11-07 01:31:08,887 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:31:08,887 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 [2021-11-07 01:31:09,136 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:31:09,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:09,723 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:31:09,723 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:09,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901830007] [2021-11-07 01:31:09,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1901830007] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:09,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:09,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:31:09,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434025686] [2021-11-07 01:31:09,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:31:09,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:09,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:31:09,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:31:09,726 INFO L87 Difference]: Start difference. First operand 3081 states and 4456 transitions. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:48,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:48,081 INFO L93 Difference]: Finished difference Result 7092 states and 10316 transitions. [2021-11-07 01:31:48,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:31:48,083 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 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 190 [2021-11-07 01:31:48,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:48,089 INFO L225 Difference]: With dead ends: 7092 [2021-11-07 01:31:48,090 INFO L226 Difference]: Without dead ends: 4332 [2021-11-07 01:31:48,093 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:31:48,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4332 states. [2021-11-07 01:31:48,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4332 to 3147. [2021-11-07 01:31:48,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3147 states, 3146 states have (on average 1.4373808010171647) internal successors, (4522), 3146 states have internal predecessors, (4522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:48,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3147 states to 3147 states and 4522 transitions. [2021-11-07 01:31:48,380 INFO L78 Accepts]: Start accepts. Automaton has 3147 states and 4522 transitions. Word has length 190 [2021-11-07 01:31:48,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:48,381 INFO L470 AbstractCegarLoop]: Abstraction has 3147 states and 4522 transitions. [2021-11-07 01:31:48,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:31:48,381 INFO L276 IsEmpty]: Start isEmpty. Operand 3147 states and 4522 transitions. [2021-11-07 01:31:48,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-07 01:31:48,385 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:48,385 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:48,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:48,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:48,586 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:31:48,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:48,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1700911676, now seen corresponding path program 1 times [2021-11-07 01:31:48,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:48,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721348115] [2021-11-07 01:31:48,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:48,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:48,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:48,589 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:48,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:31:51,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:51,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:31:51,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:51,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:51,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:51,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:51,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:51,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:51,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:51,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:51,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:51,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:51,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:51,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:51,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:51,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:31:51,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:31:51,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:31:51,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:31:51,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:31:51,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:31:52,213 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:31:52,213 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 [2021-11-07 01:31:53,335 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:31:53,335 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 [2021-11-07 01:31:53,581 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:31:53,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:54,196 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:31:54,197 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:54,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721348115] [2021-11-07 01:31:54,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721348115] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:54,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:54,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:31:54,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64082775] [2021-11-07 01:31:54,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:31:54,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:54,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:31:54,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:31:54,202 INFO L87 Difference]: Start difference. First operand 3147 states and 4522 transitions. Second operand has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:29,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:32:29,016 INFO L93 Difference]: Finished difference Result 7312 states and 10551 transitions. [2021-11-07 01:32:29,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:32:29,018 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2021-11-07 01:32:29,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:32:29,022 INFO L225 Difference]: With dead ends: 7312 [2021-11-07 01:32:29,022 INFO L226 Difference]: Without dead ends: 4503 [2021-11-07 01:32:29,025 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:32:29,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4503 states. [2021-11-07 01:32:29,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4503 to 3366. [2021-11-07 01:32:29,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3366 states, 3365 states have (on average 1.4208023774145617) internal successors, (4781), 3365 states have internal predecessors, (4781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:29,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3366 states to 3366 states and 4781 transitions. [2021-11-07 01:32:29,317 INFO L78 Accepts]: Start accepts. Automaton has 3366 states and 4781 transitions. Word has length 191 [2021-11-07 01:32:29,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:32:29,317 INFO L470 AbstractCegarLoop]: Abstraction has 3366 states and 4781 transitions. [2021-11-07 01:32:29,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:32:29,317 INFO L276 IsEmpty]: Start isEmpty. Operand 3366 states and 4781 transitions. [2021-11-07 01:32:29,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-07 01:32:29,321 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:32:29,322 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:32:29,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:32:29,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:32:29,522 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:32:29,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:32:29,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1281413366, now seen corresponding path program 1 times [2021-11-07 01:32:29,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:32:29,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1578255359] [2021-11-07 01:32:29,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:32:29,525 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:32:29,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:32:29,526 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:32:29,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:32:32,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:32:32,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:32:32,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:32:32,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:32,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:32,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:32,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:32,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:32,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:32,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:32,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:32,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:32,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:32,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:32,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:32,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:32:32,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:32:32,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:32:32,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:32:32,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:32:32,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:32:32,755 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:32:32,755 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 [2021-11-07 01:32:34,008 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:32:34,009 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 [2021-11-07 01:32:34,272 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:32:34,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:32:34,898 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:32:34,898 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:32:34,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1578255359] [2021-11-07 01:32:34,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1578255359] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:32:34,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:32:34,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:32:34,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644477910] [2021-11-07 01:32:34,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:32:34,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:32:34,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:32:34,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:32:34,900 INFO L87 Difference]: Start difference. First operand 3366 states and 4781 transitions. Second operand has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 6 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:10,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:10,260 INFO L93 Difference]: Finished difference Result 8034 states and 11463 transitions. [2021-11-07 01:33:10,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:33:10,263 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 6 states have internal predecessors, (146), 0 states have call successors, (0), 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 194 [2021-11-07 01:33:10,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:10,270 INFO L225 Difference]: With dead ends: 8034 [2021-11-07 01:33:10,270 INFO L226 Difference]: Without dead ends: 4689 [2021-11-07 01:33:10,273 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:33:10,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4689 states. [2021-11-07 01:33:10,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4689 to 3573. [2021-11-07 01:33:10,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3573 states, 3572 states have (on average 1.4059350503919372) internal successors, (5022), 3572 states have internal predecessors, (5022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:10,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3573 states to 3573 states and 5022 transitions. [2021-11-07 01:33:10,510 INFO L78 Accepts]: Start accepts. Automaton has 3573 states and 5022 transitions. Word has length 194 [2021-11-07 01:33:10,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:10,510 INFO L470 AbstractCegarLoop]: Abstraction has 3573 states and 5022 transitions. [2021-11-07 01:33:10,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 6 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:10,511 INFO L276 IsEmpty]: Start isEmpty. Operand 3573 states and 5022 transitions. [2021-11-07 01:33:10,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-07 01:33:10,517 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:10,517 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:10,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:10,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:10,733 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:33:10,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:10,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1834561464, now seen corresponding path program 1 times [2021-11-07 01:33:10,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:10,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1157977695] [2021-11-07 01:33:10,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:10,736 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:10,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:10,737 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:10,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:33:13,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:13,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:33:13,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:13,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:13,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:13,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:13,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:13,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:13,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:13,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:13,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:13,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:13,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:13,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:13,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:13,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:13,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:33:13,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:33:13,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:33:13,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:33:13,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:33:14,356 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:33:14,357 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 [2021-11-07 01:33:15,698 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:33:15,698 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 [2021-11-07 01:33:15,951 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:33:15,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:16,564 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:33:16,564 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:16,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1157977695] [2021-11-07 01:33:16,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1157977695] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:16,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:16,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:33:16,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830873475] [2021-11-07 01:33:16,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:33:16,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:16,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:33:16,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:33:16,566 INFO L87 Difference]: Start difference. First operand 3573 states and 5022 transitions. Second operand has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:50,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:33:50,174 INFO L93 Difference]: Finished difference Result 8181 states and 11591 transitions. [2021-11-07 01:33:50,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:33:50,176 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 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 195 [2021-11-07 01:33:50,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:33:50,180 INFO L225 Difference]: With dead ends: 8181 [2021-11-07 01:33:50,180 INFO L226 Difference]: Without dead ends: 4629 [2021-11-07 01:33:50,183 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:33:50,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4629 states. [2021-11-07 01:33:50,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4629 to 3582. [2021-11-07 01:33:50,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3582 states, 3581 states have (on average 1.3993297961463278) internal successors, (5011), 3581 states have internal predecessors, (5011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:50,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3582 states to 3582 states and 5011 transitions. [2021-11-07 01:33:50,384 INFO L78 Accepts]: Start accepts. Automaton has 3582 states and 5011 transitions. Word has length 195 [2021-11-07 01:33:50,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:33:50,385 INFO L470 AbstractCegarLoop]: Abstraction has 3582 states and 5011 transitions. [2021-11-07 01:33:50,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:33:50,385 INFO L276 IsEmpty]: Start isEmpty. Operand 3582 states and 5011 transitions. [2021-11-07 01:33:50,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-07 01:33:50,391 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:33:50,391 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:33:50,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:33:50,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:33:50,617 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:33:50,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:33:50,617 INFO L85 PathProgramCache]: Analyzing trace with hash 585189628, now seen corresponding path program 1 times [2021-11-07 01:33:50,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:33:50,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198326591] [2021-11-07 01:33:50,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:33:50,619 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:33:50,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:33:50,619 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:33:50,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:33:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:33:53,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:33:53,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:33:53,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:53,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:53,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:53,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:53,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:53,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:53,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:53,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:53,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:53,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:53,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:53,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:53,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:33:53,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:33:53,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:33:53,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:33:53,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:33:53,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:33:53,943 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:33:53,943 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 [2021-11-07 01:33:55,312 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:33:55,313 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 [2021-11-07 01:33:55,555 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:33:55,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:33:56,132 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-07 01:33:56,132 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:33:56,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198326591] [2021-11-07 01:33:56,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198326591] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:33:56,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:33:56,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:33:56,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995068873] [2021-11-07 01:33:56,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:33:56,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:33:56,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:33:56,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:33:56,134 INFO L87 Difference]: Start difference. First operand 3582 states and 5011 transitions. Second operand has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:25,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:34:25,398 INFO L93 Difference]: Finished difference Result 8136 states and 11481 transitions. [2021-11-07 01:34:25,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:34:25,400 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 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 195 [2021-11-07 01:34:25,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:34:25,403 INFO L225 Difference]: With dead ends: 8136 [2021-11-07 01:34:25,403 INFO L226 Difference]: Without dead ends: 4575 [2021-11-07 01:34:25,406 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:34:25,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4575 states. [2021-11-07 01:34:25,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4575 to 3601. [2021-11-07 01:34:25,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3601 states, 3600 states have (on average 1.3969444444444445) internal successors, (5029), 3600 states have internal predecessors, (5029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:25,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3601 states to 3601 states and 5029 transitions. [2021-11-07 01:34:25,602 INFO L78 Accepts]: Start accepts. Automaton has 3601 states and 5029 transitions. Word has length 195 [2021-11-07 01:34:25,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:34:25,602 INFO L470 AbstractCegarLoop]: Abstraction has 3601 states and 5029 transitions. [2021-11-07 01:34:25,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:34:25,602 INFO L276 IsEmpty]: Start isEmpty. Operand 3601 states and 5029 transitions. [2021-11-07 01:34:25,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-07 01:34:25,606 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:34:25,606 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:34:25,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-07 01:34:25,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:34:25,807 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:34:25,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:34:25,807 INFO L85 PathProgramCache]: Analyzing trace with hash -396295493, now seen corresponding path program 1 times [2021-11-07 01:34:25,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:34:25,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1054322114] [2021-11-07 01:34:25,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:34:25,808 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:34:25,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:34:25,809 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:34:25,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03b38e5-fdf9-456e-b071-0dab8fd6e606/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 01:34:28,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:34:28,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:34:28,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:34:28,974 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 162 treesize of output 138 [2021-11-07 01:34:28,978 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 138 treesize of output 90 [2021-11-07 01:34:28,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:34:28,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:34:28,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:34:28,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:28,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:34:28,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:34:28,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:34:28,987 INFO L190 IndexEqualityManager]: detected not equals via solver