./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6fed4ea6707efb0c46113b7defb1e72bb9bbe71f593886f20a58e457577f3a05 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:56:07,572 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:56:07,574 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:56:07,606 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:56:07,607 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:56:07,608 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:56:07,610 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:56:07,612 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:56:07,615 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:56:07,616 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:56:07,617 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:56:07,618 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:56:07,619 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:56:07,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:56:07,622 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:56:07,623 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:56:07,624 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:56:07,625 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:56:07,629 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:56:07,634 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:56:07,638 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:56:07,640 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:56:07,642 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:56:07,643 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:56:07,650 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:56:07,651 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:56:07,652 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:56:07,657 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:56:07,660 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:56:07,662 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:56:07,663 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:56:07,664 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:56:07,666 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:56:07,667 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:56:07,669 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:56:07,670 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:56:07,671 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:56:07,671 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:56:07,671 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:56:07,672 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:56:07,673 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:56:07,678 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:56:07,707 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:56:07,707 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:56:07,708 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:56:07,708 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:56:07,708 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:56:07,708 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:56:07,709 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:56:07,709 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:56:07,709 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:56:07,709 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:56:07,709 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:56:07,710 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:56:07,710 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:56:07,710 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:56:07,710 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:56:07,711 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:56:07,711 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:56:07,711 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:56:07,711 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:56:07,712 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:56:07,712 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:56:07,712 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:56:07,712 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:56:07,713 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:56:07,713 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:56:07,713 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:56:07,713 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:56:07,713 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:56:07,714 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:56:07,714 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:56:07,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:56:07,714 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:56:07,714 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:56:07,715 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:56:07,715 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:56:07,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:56:07,715 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:56:07,715 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:56:07,716 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:56:07,716 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_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6fed4ea6707efb0c46113b7defb1e72bb9bbe71f593886f20a58e457577f3a05 [2021-11-03 04:56:07,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:56:08,014 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:56:08,017 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:56:08,018 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:56:08,019 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:56:08,020 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-1.c [2021-11-03 04:56:08,120 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/data/a19a74f21/e0c87e1c948c4f9e9570fe460a4becc2/FLAG56ae0bc84 [2021-11-03 04:56:08,685 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:56:08,686 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-1.c [2021-11-03 04:56:08,713 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/data/a19a74f21/e0c87e1c948c4f9e9570fe460a4becc2/FLAG56ae0bc84 [2021-11-03 04:56:08,954 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/data/a19a74f21/e0c87e1c948c4f9e9570fe460a4becc2 [2021-11-03 04:56:08,957 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:56:08,958 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:56:08,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:56:08,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:56:08,989 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:56:08,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:56:08" (1/1) ... [2021-11-03 04:56:08,991 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cfd2189 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:08, skipping insertion in model container [2021-11-03 04:56:08,991 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:56:08" (1/1) ... [2021-11-03 04:56:08,997 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:56:09,078 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:56:09,537 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_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-1.c[75166,75179] [2021-11-03 04:56:09,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:56:09,567 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-03 04:56:09,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@e7c298c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:09, skipping insertion in model container [2021-11-03 04:56:09,568 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:56:09,569 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:56:09,571 INFO L168 Benchmark]: Toolchain (without parser) took 611.27 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 78.5 MB in the beginning and 98.4 MB in the end (delta: -19.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-03 04:56:09,573 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 111.1 MB. Free memory is still 64.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:56:09,574 INFO L168 Benchmark]: CACSL2BoogieTranslator took 582.55 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 78.3 MB in the beginning and 98.4 MB in the end (delta: -20.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-03 04:56:09,577 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 111.1 MB. Free memory is still 64.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 582.55 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 78.3 MB in the beginning and 98.4 MB in the end (delta: -20.1 MB). Peak memory consumption was 10.5 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_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6fed4ea6707efb0c46113b7defb1e72bb9bbe71f593886f20a58e457577f3a05 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:56:11,924 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:56:11,927 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:56:11,957 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:56:11,958 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:56:11,959 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:56:11,961 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:56:11,963 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:56:11,965 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:56:11,966 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:56:11,967 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:56:11,969 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:56:11,969 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:56:11,971 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:56:11,972 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:56:11,974 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:56:11,975 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:56:11,976 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:56:11,978 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:56:11,985 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:56:11,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:56:11,992 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:56:11,994 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:56:11,996 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:56:12,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:56:12,007 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:56:12,007 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:56:12,011 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:56:12,011 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:56:12,013 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:56:12,014 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:56:12,015 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:56:12,016 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:56:12,017 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:56:12,018 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:56:12,019 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:56:12,020 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:56:12,020 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:56:12,020 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:56:12,022 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:56:12,023 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:56:12,024 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 04:56:12,070 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:56:12,070 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:56:12,072 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:56:12,072 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:56:12,072 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:56:12,072 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:56:12,072 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:56:12,073 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:56:12,073 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:56:12,074 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:56:12,075 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:56:12,076 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:56:12,076 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:56:12,076 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:56:12,076 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:56:12,076 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:56:12,077 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:56:12,077 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:56:12,077 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:56:12,077 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:56:12,077 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:56:12,078 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:56:12,078 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:56:12,078 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:56:12,078 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:56:12,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:56:12,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:56:12,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:56:12,079 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:56:12,080 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:56:12,080 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:56:12,080 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:56:12,080 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:56:12,081 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:56:12,081 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:56:12,081 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_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6fed4ea6707efb0c46113b7defb1e72bb9bbe71f593886f20a58e457577f3a05 [2021-11-03 04:56:12,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:56:12,469 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:56:12,472 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:56:12,473 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:56:12,474 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:56:12,475 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-1.c [2021-11-03 04:56:12,557 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/data/e19056327/3532d93698da428099d1afbe122dbd55/FLAGec86c1744 [2021-11-03 04:56:13,319 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:56:13,320 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-1.c [2021-11-03 04:56:13,351 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/data/e19056327/3532d93698da428099d1afbe122dbd55/FLAGec86c1744 [2021-11-03 04:56:13,499 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/data/e19056327/3532d93698da428099d1afbe122dbd55 [2021-11-03 04:56:13,507 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:56:13,510 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:56:13,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:56:13,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:56:13,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:56:13,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:56:13" (1/1) ... [2021-11-03 04:56:13,517 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@463b5c6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:13, skipping insertion in model container [2021-11-03 04:56:13,517 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:56:13" (1/1) ... [2021-11-03 04:56:13,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:56:13,586 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:56:14,068 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_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-1.c[75166,75179] [2021-11-03 04:56:14,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:56:14,105 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:56:14,119 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:56:14,274 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_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-1.c[75166,75179] [2021-11-03 04:56:14,277 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:56:14,296 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:56:14,417 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_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/sv-benchmarks/c/openssl/s3_srvr.blast.12.i.cil-1.c[75166,75179] [2021-11-03 04:56:14,420 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:56:14,438 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:56:14,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:14 WrapperNode [2021-11-03 04:56:14,440 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:56:14,441 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:56:14,441 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:56:14,442 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:56:14,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:14" (1/1) ... [2021-11-03 04:56:14,493 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:14" (1/1) ... [2021-11-03 04:56:14,545 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:56:14,545 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:56:14,546 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:56:14,546 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:56:14,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:14" (1/1) ... [2021-11-03 04:56:14,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:14" (1/1) ... [2021-11-03 04:56:14,572 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:14" (1/1) ... [2021-11-03 04:56:14,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:14" (1/1) ... [2021-11-03 04:56:14,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:14" (1/1) ... [2021-11-03 04:56:14,662 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:14" (1/1) ... [2021-11-03 04:56:14,666 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:14" (1/1) ... [2021-11-03 04:56:14,672 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:56:14,673 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:56:14,673 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:56:14,674 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:56:14,674 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:14" (1/1) ... [2021-11-03 04:56:14,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:56:14,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:56:14,706 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:56:14,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:56:14,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:56:14,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 04:56:14,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:56:14,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 04:56:14,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 04:56:14,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 04:56:14,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:56:14,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:56:14,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 04:56:14,988 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-03 04:56:24,807 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-03 04:56:24,807 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-03 04:56:24,816 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:56:24,816 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-03 04:56:24,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:56:24 BoogieIcfgContainer [2021-11-03 04:56:24,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:56:24,829 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:56:24,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:56:24,832 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:56:24,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:56:13" (1/3) ... [2021-11-03 04:56:24,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@466f9c94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:56:24, skipping insertion in model container [2021-11-03 04:56:24,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:56:14" (2/3) ... [2021-11-03 04:56:24,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@466f9c94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:56:24, skipping insertion in model container [2021-11-03 04:56:24,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:56:24" (3/3) ... [2021-11-03 04:56:24,835 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.12.i.cil-1.c [2021-11-03 04:56:24,840 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:56:24,841 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 04:56:24,890 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:56:24,895 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 04:56:24,895 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 04:56:24,914 INFO L276 IsEmpty]: Start isEmpty. Operand has 152 states, 150 states have (on average 1.72) internal successors, (258), 151 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:56:24,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-03 04:56:24,922 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:56:24,923 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:56:24,923 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:56:24,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:56:24,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1692197635, now seen corresponding path program 1 times [2021-11-03 04:56:24,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:56:24,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [164768487] [2021-11-03 04:56:24,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:56:24,944 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:56:24,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:56:24,950 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:56:24,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:56:25,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:56:25,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 04:56:25,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:56:25,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-03 04:56:25,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-03 04:56:25,613 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:56:25,621 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-03 04:56:25,642 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:56:25,646 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-03 04:56:25,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 319 [2021-11-03 04:56:26,134 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-03 04:56:26,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 8 case distinctions, treesize of input 717 treesize of output 669 [2021-11-03 04:56:26,217 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:56:26,219 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-03 04:56:26,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 210 [2021-11-03 04:56:26,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 101 [2021-11-03 04:56:26,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 13 [2021-11-03 04:56:26,467 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-03 04:56:26,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 13 [2021-11-03 04:56:26,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:26,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 13 [2021-11-03 04:56:26,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-03 04:56:26,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-03 04:56:26,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:56:26,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:56:26,923 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:56:26,926 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-03 04:56:26,932 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:56:26,935 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-03 04:56:27,104 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:56:27,107 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-03 04:56:27,114 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:56:27,116 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-03 04:56:27,126 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:56:27,130 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-03 04:56:27,146 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:56:27,149 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-03 04:56:27,167 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:56:27,170 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-03 04:56:27,200 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:56:27,204 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-03 04:56:27,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:56:27,699 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:56:27,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [164768487] [2021-11-03 04:56:27,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [164768487] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:56:27,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:56:27,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 04:56:27,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723293050] [2021-11-03 04:56:27,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:56:27,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:56:27,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:56:27,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:56:27,723 INFO L87 Difference]: Start difference. First operand has 152 states, 150 states have (on average 1.72) internal successors, (258), 151 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:56:43,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:56:43,355 INFO L93 Difference]: Finished difference Result 305 states and 515 transitions. [2021-11-03 04:56:43,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:56:43,358 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 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 43 [2021-11-03 04:56:43,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:56:43,367 INFO L225 Difference]: With dead ends: 305 [2021-11-03 04:56:43,368 INFO L226 Difference]: Without dead ends: 139 [2021-11-03 04:56:43,371 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:56:43,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-03 04:56:43,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-11-03 04:56:43,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.5434782608695652) internal successors, (213), 138 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:56:43,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 213 transitions. [2021-11-03 04:56:43,409 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 213 transitions. Word has length 43 [2021-11-03 04:56:43,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:56:43,410 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 213 transitions. [2021-11-03 04:56:43,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:56:43,410 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 213 transitions. [2021-11-03 04:56:43,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-03 04:56:43,412 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:56:43,413 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:56:43,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:56:43,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:56:43,622 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:56:43,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:56:43,623 INFO L85 PathProgramCache]: Analyzing trace with hash 2115844357, now seen corresponding path program 1 times [2021-11-03 04:56:43,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:56:43,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [169897501] [2021-11-03 04:56:43,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:56:43,625 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:56:43,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:56:43,628 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:56:43,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:56:43,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:56:44,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:56:44,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:56:44,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:44,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:44,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:44,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:44,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:56:44,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:56:44,432 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:56:44,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 04:56:47,801 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:56:47,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 04:56:55,849 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:56:55,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-03 04:56:55,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:56:55,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:57:04,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:57:04,270 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:57:04,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [169897501] [2021-11-03 04:57:04,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [169897501] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:57:04,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:57:04,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 6 [2021-11-03 04:57:04,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610610692] [2021-11-03 04:57:04,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:57:04,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:57:04,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:57:04,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=15, Unknown=3, NotChecked=0, Total=30 [2021-11-03 04:57:04,274 INFO L87 Difference]: Start difference. First operand 139 states and 213 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:57:38,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:57:38,028 INFO L93 Difference]: Finished difference Result 301 states and 461 transitions. [2021-11-03 04:57:38,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:57:38,030 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-03 04:57:38,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:57:38,033 INFO L225 Difference]: With dead ends: 301 [2021-11-03 04:57:38,033 INFO L226 Difference]: Without dead ends: 172 [2021-11-03 04:57:38,035 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=18, Invalid=21, Unknown=3, NotChecked=0, Total=42 [2021-11-03 04:57:38,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-03 04:57:38,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 155. [2021-11-03 04:57:38,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.551948051948052) internal successors, (239), 154 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:57:38,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 239 transitions. [2021-11-03 04:57:38,052 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 239 transitions. Word has length 43 [2021-11-03 04:57:38,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:57:38,053 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 239 transitions. [2021-11-03 04:57:38,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:57:38,054 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 239 transitions. [2021-11-03 04:57:38,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-03 04:57:38,057 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:57:38,058 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:57:38,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-03 04:57:38,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:57:38,263 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:57:38,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:57:38,264 INFO L85 PathProgramCache]: Analyzing trace with hash 270477191, now seen corresponding path program 1 times [2021-11-03 04:57:38,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:57:38,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [140511432] [2021-11-03 04:57:38,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:57:38,265 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:57:38,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:57:38,271 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:57:38,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:57:38,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:57:38,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:57:38,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:57:38,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:57:38,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:57:38,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:57:38,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:57:38,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:57:38,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:57:39,261 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:57:39,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 04:57:42,638 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:57:42,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 04:57:50,504 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:57:50,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-03 04:57:50,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:57:50,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:57:58,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:57:58,969 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:57:58,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [140511432] [2021-11-03 04:57:58,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [140511432] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:57:58,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:57:58,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 6 [2021-11-03 04:57:58,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397261135] [2021-11-03 04:57:58,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:57:58,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:57:58,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:57:58,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=15, Unknown=3, NotChecked=0, Total=30 [2021-11-03 04:57:58,972 INFO L87 Difference]: Start difference. First operand 155 states and 239 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:58:31,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:58:31,339 INFO L93 Difference]: Finished difference Result 312 states and 480 transitions. [2021-11-03 04:58:31,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:58:31,341 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-03 04:58:31,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:58:31,349 INFO L225 Difference]: With dead ends: 312 [2021-11-03 04:58:31,350 INFO L226 Difference]: Without dead ends: 183 [2021-11-03 04:58:31,351 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=18, Invalid=21, Unknown=3, NotChecked=0, Total=42 [2021-11-03 04:58:31,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-03 04:58:31,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 150. [2021-11-03 04:58:31,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.5570469798657718) internal successors, (232), 149 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:58:31,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 232 transitions. [2021-11-03 04:58:31,378 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 232 transitions. Word has length 43 [2021-11-03 04:58:31,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:58:31,378 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 232 transitions. [2021-11-03 04:58:31,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:58:31,378 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 232 transitions. [2021-11-03 04:58:31,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-03 04:58:31,380 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:58:31,380 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:58:31,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-03 04:58:31,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:58:31,581 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:58:31,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:58:31,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1636123909, now seen corresponding path program 1 times [2021-11-03 04:58:31,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:58:31,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1261385168] [2021-11-03 04:58:31,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:58:31,584 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:58:31,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:58:31,586 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:58:31,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:58:32,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:58:32,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:58:32,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:58:32,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:58:32,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:58:32,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:58:32,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:58:32,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:58:32,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:58:32,676 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:58:32,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 04:58:36,029 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:58:36,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 04:58:43,568 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:58:43,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-03 04:58:43,733 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:58:43,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:58:44,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:58:44,143 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:58:44,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1261385168] [2021-11-03 04:58:44,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1261385168] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:58:44,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:58:44,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:58:44,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129149860] [2021-11-03 04:58:44,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:58:44,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:58:44,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:58:44,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:58:44,145 INFO L87 Difference]: Start difference. First operand 150 states and 232 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:59:35,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:59:35,950 INFO L93 Difference]: Finished difference Result 417 states and 643 transitions. [2021-11-03 04:59:35,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:59:35,951 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-03 04:59:35,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:59:35,954 INFO L225 Difference]: With dead ends: 417 [2021-11-03 04:59:35,954 INFO L226 Difference]: Without dead ends: 288 [2021-11-03 04:59:35,955 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 04:59:35,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-11-03 04:59:35,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 166. [2021-11-03 04:59:35,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.5575757575757576) internal successors, (257), 165 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:59:35,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 257 transitions. [2021-11-03 04:59:35,967 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 257 transitions. Word has length 56 [2021-11-03 04:59:35,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:59:35,967 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 257 transitions. [2021-11-03 04:59:35,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:59:35,968 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 257 transitions. [2021-11-03 04:59:35,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-03 04:59:35,969 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:59:35,969 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:59:35,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:59:36,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:59:36,178 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:59:36,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:59:36,178 INFO L85 PathProgramCache]: Analyzing trace with hash -301361520, now seen corresponding path program 1 times [2021-11-03 04:59:36,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:59:36,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1100128118] [2021-11-03 04:59:36,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:59:36,180 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:59:36,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:59:36,206 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:59:36,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:59:36,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:59:36,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:59:36,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:59:36,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:59:36,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:59:36,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:59:36,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:59:36,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:59:36,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:59:37,278 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 04:59:37,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 04:59:40,322 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 04:59:40,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 04:59:47,043 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 04:59:47,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-03 04:59:47,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:59:47,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:59:47,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:59:47,531 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:59:47,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1100128118] [2021-11-03 04:59:47,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1100128118] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:59:47,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:59:47,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 04:59:47,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881444077] [2021-11-03 04:59:47,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:59:47,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:59:47,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:59:47,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 04:59:47,534 INFO L87 Difference]: Start difference. First operand 166 states and 257 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:00:25,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:00:25,093 INFO L93 Difference]: Finished difference Result 447 states and 692 transitions. [2021-11-03 05:00:25,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:00:25,094 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-03 05:00:25,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:00:25,097 INFO L225 Difference]: With dead ends: 447 [2021-11-03 05:00:25,097 INFO L226 Difference]: Without dead ends: 302 [2021-11-03 05:00:25,098 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 05:00:25,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-11-03 05:00:25,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 177. [2021-11-03 05:00:25,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.5397727272727273) internal successors, (271), 176 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:00:25,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 271 transitions. [2021-11-03 05:00:25,112 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 271 transitions. Word has length 57 [2021-11-03 05:00:25,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:00:25,112 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 271 transitions. [2021-11-03 05:00:25,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:00:25,113 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 271 transitions. [2021-11-03 05:00:25,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-03 05:00:25,115 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:00:25,115 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:00:25,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 05:00:25,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:00:25,326 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:00:25,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:00:25,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1304983516, now seen corresponding path program 1 times [2021-11-03 05:00:25,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:00:25,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [51771577] [2021-11-03 05:00:25,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:00:25,327 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:00:25,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:00:25,340 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:00:25,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 05:00:26,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:00:26,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:00:26,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:00:26,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:00:26,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:00:26,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:00:26,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:00:26,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:00:26,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:00:26,521 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 05:00:26,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 05:00:29,957 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 05:00:29,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 05:00:36,973 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 05:00:36,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-03 05:00:37,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:00:37,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:00:37,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:00:37,571 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:00:37,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [51771577] [2021-11-03 05:00:37,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [51771577] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:00:37,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:00:37,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 05:00:37,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226189661] [2021-11-03 05:00:37,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:00:37,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:00:37,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:00:37,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 05:00:37,573 INFO L87 Difference]: Start difference. First operand 177 states and 271 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:01:14,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:01:14,054 INFO L93 Difference]: Finished difference Result 460 states and 706 transitions. [2021-11-03 05:01:14,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:01:14,056 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-03 05:01:14,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:01:14,058 INFO L225 Difference]: With dead ends: 460 [2021-11-03 05:01:14,058 INFO L226 Difference]: Without dead ends: 304 [2021-11-03 05:01:14,059 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 05:01:14,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-11-03 05:01:14,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 190. [2021-11-03 05:01:14,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.5238095238095237) internal successors, (288), 189 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:01:14,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 288 transitions. [2021-11-03 05:01:14,073 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 288 transitions. Word has length 57 [2021-11-03 05:01:14,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:01:14,073 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 288 transitions. [2021-11-03 05:01:14,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:01:14,074 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 288 transitions. [2021-11-03 05:01:14,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-03 05:01:14,075 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:01:14,076 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:01:14,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 05:01:14,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:01:14,294 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:01:14,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:01:14,295 INFO L85 PathProgramCache]: Analyzing trace with hash 2122058939, now seen corresponding path program 1 times [2021-11-03 05:01:14,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:01:14,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [653043850] [2021-11-03 05:01:14,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:01:14,296 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:01:14,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:01:14,297 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:01:14,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 05:01:15,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:01:15,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:01:15,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:01:15,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:15,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:15,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:15,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:15,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:01:15,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:01:15,471 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 05:01:15,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 05:01:18,865 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 05:01:18,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 05:01:26,511 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 05:01:26,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-03 05:01:26,649 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:01:26,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:01:26,980 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:01:26,980 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:01:26,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [653043850] [2021-11-03 05:01:26,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [653043850] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:01:26,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:01:26,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 05:01:26,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055087148] [2021-11-03 05:01:26,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:01:26,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:01:26,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:01:26,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 05:01:26,983 INFO L87 Difference]: Start difference. First operand 190 states and 288 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:02:12,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:02:12,329 INFO L93 Difference]: Finished difference Result 497 states and 759 transitions. [2021-11-03 05:02:12,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:02:12,331 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-03 05:02:12,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:02:12,333 INFO L225 Difference]: With dead ends: 497 [2021-11-03 05:02:12,334 INFO L226 Difference]: Without dead ends: 328 [2021-11-03 05:02:12,334 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 05:02:12,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-11-03 05:02:12,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 212. [2021-11-03 05:02:12,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.5260663507109005) internal successors, (322), 211 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:02:12,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 322 transitions. [2021-11-03 05:02:12,346 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 322 transitions. Word has length 57 [2021-11-03 05:02:12,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:02:12,347 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 322 transitions. [2021-11-03 05:02:12,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:02:12,347 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 322 transitions. [2021-11-03 05:02:12,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-03 05:02:12,348 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:02:12,349 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:02:12,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-03 05:02:12,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:02:12,557 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:02:12,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:02:12,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1437563525, now seen corresponding path program 1 times [2021-11-03 05:02:12,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:02:12,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130684698] [2021-11-03 05:02:12,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:02:12,560 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:02:12,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:02:12,561 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:02:12,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 05:02:13,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:02:13,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:02:13,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:02:13,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:02:13,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:02:13,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:02:13,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:02:13,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:02:13,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:02:13,945 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 05:02:13,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 05:02:17,430 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 05:02:17,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 05:02:25,065 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 05:02:25,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-03 05:02:25,205 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:02:25,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:02:25,536 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:02:25,536 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:02:25,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130684698] [2021-11-03 05:02:25,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130684698] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:02:25,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:02:25,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 05:02:25,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368788628] [2021-11-03 05:02:25,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:02:25,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:02:25,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:02:25,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 05:02:25,538 INFO L87 Difference]: Start difference. First operand 212 states and 322 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:08,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:03:08,625 INFO L93 Difference]: Finished difference Result 520 states and 795 transitions. [2021-11-03 05:03:08,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:03:08,626 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-03 05:03:08,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:03:08,629 INFO L225 Difference]: With dead ends: 520 [2021-11-03 05:03:08,629 INFO L226 Difference]: Without dead ends: 329 [2021-11-03 05:03:08,630 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 05:03:08,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-11-03 05:03:08,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 213. [2021-11-03 05:03:08,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.5141509433962264) internal successors, (321), 212 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:08,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 321 transitions. [2021-11-03 05:03:08,643 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 321 transitions. Word has length 57 [2021-11-03 05:03:08,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:03:08,644 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 321 transitions. [2021-11-03 05:03:08,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:03:08,644 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 321 transitions. [2021-11-03 05:03:08,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-03 05:03:08,645 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:03:08,646 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:03:08,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 05:03:08,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:03:08,866 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:03:08,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:03:08,866 INFO L85 PathProgramCache]: Analyzing trace with hash -199560092, now seen corresponding path program 1 times [2021-11-03 05:03:08,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:03:08,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [84861106] [2021-11-03 05:03:08,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:03:08,867 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:03:08,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:03:08,868 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:03:08,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 05:03:09,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:03:09,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:03:09,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:03:09,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:09,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:09,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:09,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:09,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:03:09,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:03:10,332 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 05:03:10,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 05:03:13,716 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 05:03:13,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 05:03:20,736 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 05:03:20,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-03 05:03:20,903 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:20,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:03:21,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:03:21,233 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:03:21,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [84861106] [2021-11-03 05:03:21,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [84861106] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:03:21,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:03:21,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 05:03:21,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590000833] [2021-11-03 05:03:21,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:03:21,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:03:21,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:03:21,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 05:03:21,235 INFO L87 Difference]: Start difference. First operand 213 states and 321 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:03,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:04:03,394 INFO L93 Difference]: Finished difference Result 553 states and 834 transitions. [2021-11-03 05:04:03,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:04:03,396 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-03 05:04:03,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:04:03,398 INFO L225 Difference]: With dead ends: 553 [2021-11-03 05:04:03,399 INFO L226 Difference]: Without dead ends: 361 [2021-11-03 05:04:03,399 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 05:04:03,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-11-03 05:04:03,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 262. [2021-11-03 05:04:03,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.4827586206896552) internal successors, (387), 261 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:03,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 387 transitions. [2021-11-03 05:04:03,416 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 387 transitions. Word has length 58 [2021-11-03 05:04:03,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:04:03,416 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 387 transitions. [2021-11-03 05:04:03,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:03,417 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 387 transitions. [2021-11-03 05:04:03,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 05:04:03,418 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:04:03,418 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:04:03,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 05:04:03,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:04:03,635 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:04:03,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:04:03,635 INFO L85 PathProgramCache]: Analyzing trace with hash -204940119, now seen corresponding path program 1 times [2021-11-03 05:04:03,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:04:03,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1572582522] [2021-11-03 05:04:03,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:04:03,636 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:04:03,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:04:03,640 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:04:03,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 05:04:04,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:04:04,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:04:04,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:04:04,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:04:04,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:04:04,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:04:04,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:04:04,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:04:04,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:04:05,112 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 05:04:05,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 05:04:08,565 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 05:04:08,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 05:04:15,759 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 05:04:15,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-03 05:04:15,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:15,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:04:16,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:04:16,276 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:04:16,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1572582522] [2021-11-03 05:04:16,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1572582522] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:04:16,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:04:16,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 05:04:16,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373129249] [2021-11-03 05:04:16,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:04:16,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:04:16,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:04:16,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 05:04:16,278 INFO L87 Difference]: Start difference. First operand 262 states and 387 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:51,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:04:51,747 INFO L93 Difference]: Finished difference Result 634 states and 944 transitions. [2021-11-03 05:04:51,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:04:51,748 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-03 05:04:51,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:04:51,751 INFO L225 Difference]: With dead ends: 634 [2021-11-03 05:04:51,751 INFO L226 Difference]: Without dead ends: 405 [2021-11-03 05:04:51,751 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 05:04:51,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-11-03 05:04:51,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 278. [2021-11-03 05:04:51,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 1.4657039711191335) internal successors, (406), 277 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:51,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 406 transitions. [2021-11-03 05:04:51,769 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 406 transitions. Word has length 59 [2021-11-03 05:04:51,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:04:51,769 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 406 transitions. [2021-11-03 05:04:51,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:04:51,769 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 406 transitions. [2021-11-03 05:04:51,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 05:04:51,770 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:04:51,771 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:04:51,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 05:04:51,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:04:51,985 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:04:51,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:04:51,986 INFO L85 PathProgramCache]: Analyzing trace with hash -285488759, now seen corresponding path program 1 times [2021-11-03 05:04:51,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:04:51,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [227980878] [2021-11-03 05:04:51,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:04:51,987 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:04:51,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:04:51,988 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:04:51,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 05:04:53,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:04:53,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:04:53,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:04:53,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:04:53,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:04:53,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:04:53,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:04:53,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:04:53,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:04:53,624 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-03 05:04:53,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-03 05:04:56,994 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-03 05:04:56,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-03 05:05:04,144 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-03 05:05:04,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-03 05:05:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:05:04,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:05:04,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:05:04,647 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:05:04,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [227980878] [2021-11-03 05:05:04,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [227980878] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:05:04,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:05:04,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 05:05:04,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162382273] [2021-11-03 05:05:04,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:05:04,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:05:04,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:05:04,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-03 05:05:04,650 INFO L87 Difference]: Start difference. First operand 278 states and 406 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:05:40,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:05:40,891 INFO L93 Difference]: Finished difference Result 629 states and 936 transitions. [2021-11-03 05:05:40,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:05:40,893 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-03 05:05:40,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:05:40,896 INFO L225 Difference]: With dead ends: 629 [2021-11-03 05:05:40,896 INFO L226 Difference]: Without dead ends: 384 [2021-11-03 05:05:40,896 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-03 05:05:40,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-11-03 05:05:40,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 264. [2021-11-03 05:05:40,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.4600760456273765) internal successors, (384), 263 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:05:40,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 384 transitions. [2021-11-03 05:05:40,910 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 384 transitions. Word has length 60 [2021-11-03 05:05:40,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:05:40,911 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 384 transitions. [2021-11-03 05:05:40,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:05:40,911 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 384 transitions. [2021-11-03 05:05:40,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 05:05:40,913 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:05:40,913 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] [2021-11-03 05:05:40,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-03 05:05:41,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:05:41,130 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:05:41,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:05:41,130 INFO L85 PathProgramCache]: Analyzing trace with hash 844599537, now seen corresponding path program 1 times [2021-11-03 05:05:41,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:05:41,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1212362109] [2021-11-03 05:05:41,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:05:41,131 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:05:41,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:05:41,132 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:05:41,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 05:05:42,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:05:42,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:05:42,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:05:42,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:05:42,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:05:42,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:05:42,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:05:42,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:05:42,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:05:42,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:05:42,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:05:42,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:05:42,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:05:42,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:05:42,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:05:42,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:05:42,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:05:42,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:05:42,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:05:42,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:05:42,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:05:42,845 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:05:42,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-03 05:05:44,099 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:05:44,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-03 05:05:44,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:05:44,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:05:44,485 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:05:44,486 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:05:44,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1212362109] [2021-11-03 05:05:44,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1212362109] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:05:44,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:05:44,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 05:05:44,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327967199] [2021-11-03 05:05:44,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:05:44,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:05:44,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:05:44,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:05:44,488 INFO L87 Difference]: Start difference. First operand 264 states and 384 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:05:54,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:05:54,191 INFO L93 Difference]: Finished difference Result 536 states and 785 transitions. [2021-11-03 05:05:54,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:05:54,194 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-03 05:05:54,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:05:54,197 INFO L225 Difference]: With dead ends: 536 [2021-11-03 05:05:54,197 INFO L226 Difference]: Without dead ends: 293 [2021-11-03 05:05:54,198 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:05:54,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-11-03 05:05:54,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 286. [2021-11-03 05:05:54,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 1.4526315789473685) internal successors, (414), 285 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:05:54,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 414 transitions. [2021-11-03 05:05:54,212 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 414 transitions. Word has length 60 [2021-11-03 05:05:54,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:05:54,212 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 414 transitions. [2021-11-03 05:05:54,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:05:54,213 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 414 transitions. [2021-11-03 05:05:54,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-03 05:05:54,214 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:05:54,215 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:05:54,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-03 05:05:54,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:05:54,436 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:05:54,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:05:54,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1394397078, now seen corresponding path program 1 times [2021-11-03 05:05:54,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:05:54,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1053053862] [2021-11-03 05:05:54,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:05:54,438 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:05:54,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:05:54,442 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:05:54,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 05:05:55,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:05:55,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:05:55,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:05:55,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:05:55,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:05:55,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:05:55,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:05:55,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:05:55,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:05:55,965 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 05:05:55,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-03 05:05:56,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:05:56,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:05:56,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:05:56,371 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 05:05:56,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-03 05:05:58,860 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:05:58,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-03 05:05:58,892 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:05:58,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:05:59,355 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:05:59,355 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:05:59,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1053053862] [2021-11-03 05:05:59,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1053053862] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:05:59,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:05:59,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 05:05:59,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314975759] [2021-11-03 05:05:59,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:05:59,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:05:59,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:05:59,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:05:59,358 INFO L87 Difference]: Start difference. First operand 286 states and 414 transitions. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:33,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:06:33,042 INFO L93 Difference]: Finished difference Result 794 states and 1169 transitions. [2021-11-03 05:06:33,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:06:33,043 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 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 82 [2021-11-03 05:06:33,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:06:33,048 INFO L225 Difference]: With dead ends: 794 [2021-11-03 05:06:33,048 INFO L226 Difference]: Without dead ends: 529 [2021-11-03 05:06:33,049 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:06:33,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-11-03 05:06:33,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 341. [2021-11-03 05:06:33,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.4794117647058824) internal successors, (503), 340 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:33,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 503 transitions. [2021-11-03 05:06:33,067 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 503 transitions. Word has length 82 [2021-11-03 05:06:33,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:06:33,068 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 503 transitions. [2021-11-03 05:06:33,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:06:33,068 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 503 transitions. [2021-11-03 05:06:33,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-03 05:06:33,070 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:06:33,070 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:06:33,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 05:06:33,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:06:33,292 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:06:33,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:06:33,292 INFO L85 PathProgramCache]: Analyzing trace with hash 268852943, now seen corresponding path program 1 times [2021-11-03 05:06:33,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:06:33,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1775604963] [2021-11-03 05:06:33,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:06:33,294 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:06:33,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:06:33,295 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:06:33,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 05:06:34,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:06:34,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:06:34,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:06:34,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:06:34,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:06:34,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:06:34,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:06:34,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:06:34,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:06:35,093 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 05:06:35,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-03 05:06:35,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:06:35,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:06:35,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:06:35,495 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 05:06:35,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-03 05:06:37,991 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:06:37,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-03 05:06:38,023 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:06:38,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:06:38,467 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:06:38,468 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:06:38,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1775604963] [2021-11-03 05:06:38,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1775604963] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:06:38,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:06:38,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 05:06:38,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871267579] [2021-11-03 05:06:38,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:06:38,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:06:38,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:06:38,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:06:38,470 INFO L87 Difference]: Start difference. First operand 341 states and 503 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:07:15,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:07:15,829 INFO L93 Difference]: Finished difference Result 853 states and 1277 transitions. [2021-11-03 05:07:15,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:07:15,831 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-03 05:07:15,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:07:15,834 INFO L225 Difference]: With dead ends: 853 [2021-11-03 05:07:15,835 INFO L226 Difference]: Without dead ends: 533 [2021-11-03 05:07:15,836 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:07:15,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-11-03 05:07:15,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 363. [2021-11-03 05:07:15,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 1.5082872928176796) internal successors, (546), 362 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:07:15,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 546 transitions. [2021-11-03 05:07:15,863 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 546 transitions. Word has length 83 [2021-11-03 05:07:15,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:07:15,864 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 546 transitions. [2021-11-03 05:07:15,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:07:15,864 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 546 transitions. [2021-11-03 05:07:15,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-03 05:07:15,866 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:07:15,867 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:07:15,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 05:07:16,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:07:16,082 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:07:16,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:07:16,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1519463207, now seen corresponding path program 1 times [2021-11-03 05:07:16,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:07:16,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1822229720] [2021-11-03 05:07:16,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:07:16,084 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:07:16,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:07:16,085 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:07:16,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 05:07:17,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:07:17,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:07:17,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:07:17,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:17,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:17,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:17,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:17,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:17,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:07:17,906 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 05:07:17,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-03 05:07:17,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:07:17,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:07:17,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:07:18,323 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 05:07:18,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-03 05:07:20,103 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:07:20,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-03 05:07:20,262 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:07:20,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:07:20,759 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:07:20,760 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:07:20,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1822229720] [2021-11-03 05:07:20,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1822229720] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:07:20,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:07:20,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 05:07:20,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317387562] [2021-11-03 05:07:20,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:07:20,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:07:20,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:07:20,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:07:20,762 INFO L87 Difference]: Start difference. First operand 363 states and 546 transitions. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:07:55,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:07:55,036 INFO L93 Difference]: Finished difference Result 915 states and 1383 transitions. [2021-11-03 05:07:55,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:07:55,037 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 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 109 [2021-11-03 05:07:55,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:07:55,040 INFO L225 Difference]: With dead ends: 915 [2021-11-03 05:07:55,041 INFO L226 Difference]: Without dead ends: 573 [2021-11-03 05:07:55,042 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 210 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:07:55,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-11-03 05:07:55,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 393. [2021-11-03 05:07:55,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 1.5076530612244898) internal successors, (591), 392 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:07:55,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 591 transitions. [2021-11-03 05:07:55,062 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 591 transitions. Word has length 109 [2021-11-03 05:07:55,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:07:55,063 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 591 transitions. [2021-11-03 05:07:55,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:07:55,064 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 591 transitions. [2021-11-03 05:07:55,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-03 05:07:55,066 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:07:55,066 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:07:55,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 05:07:55,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:07:55,282 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:07:55,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:07:55,283 INFO L85 PathProgramCache]: Analyzing trace with hash -173687, now seen corresponding path program 1 times [2021-11-03 05:07:55,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:07:55,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1935374931] [2021-11-03 05:07:55,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:07:55,284 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:07:55,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:07:55,285 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:07:55,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 05:07:57,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:07:57,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:07:57,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:07:57,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:57,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:57,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:57,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:57,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:07:57,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:07:57,315 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 05:07:57,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-03 05:07:57,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:07:57,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:07:57,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:07:57,732 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 05:07:57,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-03 05:07:59,822 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:07:59,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-03 05:07:59,989 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:07:59,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:08:00,496 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:08:00,496 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:08:00,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1935374931] [2021-11-03 05:08:00,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1935374931] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:08:00,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:08:00,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 05:08:00,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871651949] [2021-11-03 05:08:00,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:08:00,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:08:00,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:08:00,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:08:00,498 INFO L87 Difference]: Start difference. First operand 393 states and 591 transitions. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 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) [2021-11-03 05:08:42,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:08:42,629 INFO L93 Difference]: Finished difference Result 933 states and 1405 transitions. [2021-11-03 05:08:42,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:08:42,631 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 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 110 [2021-11-03 05:08:42,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:08:42,634 INFO L225 Difference]: With dead ends: 933 [2021-11-03 05:08:42,634 INFO L226 Difference]: Without dead ends: 561 [2021-11-03 05:08:42,635 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:08:42,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-03 05:08:42,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 393. [2021-11-03 05:08:42,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 1.5025510204081634) internal successors, (589), 392 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:08:42,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 589 transitions. [2021-11-03 05:08:42,656 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 589 transitions. Word has length 110 [2021-11-03 05:08:42,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:08:42,656 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 589 transitions. [2021-11-03 05:08:42,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 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) [2021-11-03 05:08:42,657 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 589 transitions. [2021-11-03 05:08:42,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-03 05:08:42,659 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:08:42,659 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:08:42,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 05:08:42,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:08:42,882 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:08:42,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:08:42,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1022235621, now seen corresponding path program 1 times [2021-11-03 05:08:42,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:08:42,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [601626568] [2021-11-03 05:08:42,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:08:42,885 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:08:42,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:08:42,887 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:08:42,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 05:08:44,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:08:44,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:08:44,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:08:44,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:44,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:44,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:44,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:44,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:08:44,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:08:44,976 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 05:08:44,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-03 05:08:45,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:08:45,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:08:45,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:08:45,379 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 05:08:45,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-03 05:08:47,311 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:08:47,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-03 05:08:47,447 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:08:47,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:08:47,945 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:08:47,945 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:08:47,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [601626568] [2021-11-03 05:08:47,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [601626568] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:08:47,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:08:47,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 05:08:47,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403466082] [2021-11-03 05:08:47,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:08:47,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:08:47,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:08:47,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:08:47,948 INFO L87 Difference]: Start difference. First operand 393 states and 589 transitions. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:09:11,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:09:11,927 INFO L93 Difference]: Finished difference Result 965 states and 1458 transitions. [2021-11-03 05:09:11,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:09:11,934 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-03 05:09:11,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:09:11,937 INFO L225 Difference]: With dead ends: 965 [2021-11-03 05:09:11,937 INFO L226 Difference]: Without dead ends: 593 [2021-11-03 05:09:11,938 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:09:11,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-11-03 05:09:11,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 431. [2021-11-03 05:09:11,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 1.5093023255813953) internal successors, (649), 430 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:09:11,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 649 transitions. [2021-11-03 05:09:11,960 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 649 transitions. Word has length 111 [2021-11-03 05:09:11,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:09:11,960 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 649 transitions. [2021-11-03 05:09:11,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:09:11,961 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 649 transitions. [2021-11-03 05:09:11,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-03 05:09:11,963 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:09:11,963 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:09:11,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-03 05:09:12,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:09:12,185 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:09:12,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:09:12,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1747979246, now seen corresponding path program 1 times [2021-11-03 05:09:12,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:09:12,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [546270139] [2021-11-03 05:09:12,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:09:12,187 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:09:12,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:09:12,188 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:09:12,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 05:09:13,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:09:13,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:09:13,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:09:14,104 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:09:14,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:09:14,481 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:09:14,481 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:09:14,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [546270139] [2021-11-03 05:09:14,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [546270139] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:09:14,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:09:14,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:09:14,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716174191] [2021-11-03 05:09:14,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:09:14,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:09:14,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:09:14,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:09:14,487 INFO L87 Difference]: Start difference. First operand 431 states and 649 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:09:15,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:09:15,273 INFO L93 Difference]: Finished difference Result 1621 states and 2466 transitions. [2021-11-03 05:09:15,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:09:15,274 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-03 05:09:15,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:09:15,280 INFO L225 Difference]: With dead ends: 1621 [2021-11-03 05:09:15,280 INFO L226 Difference]: Without dead ends: 1211 [2021-11-03 05:09:15,281 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:09:15,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2021-11-03 05:09:15,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 1205. [2021-11-03 05:09:15,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 1204 states have (on average 1.5141196013289036) internal successors, (1823), 1204 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:09:15,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 1823 transitions. [2021-11-03 05:09:15,353 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 1823 transitions. Word has length 117 [2021-11-03 05:09:15,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:09:15,354 INFO L470 AbstractCegarLoop]: Abstraction has 1205 states and 1823 transitions. [2021-11-03 05:09:15,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:09:15,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 1823 transitions. [2021-11-03 05:09:15,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-03 05:09:15,357 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:09:15,357 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:09:15,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 05:09:15,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:09:15,574 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:09:15,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:09:15,574 INFO L85 PathProgramCache]: Analyzing trace with hash -97387920, now seen corresponding path program 1 times [2021-11-03 05:09:15,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:09:15,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [698782952] [2021-11-03 05:09:15,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:09:15,576 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:09:15,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:09:15,577 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:09:15,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 05:09:17,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:09:17,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:09:17,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:09:17,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:09:17,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:09:17,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:09:17,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:09:17,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:09:17,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:09:17,805 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 05:09:17,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-03 05:09:17,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:09:17,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:09:17,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:09:18,306 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 05:09:18,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-03 05:09:20,601 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:09:20,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-03 05:09:20,737 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:09:20,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:09:21,296 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:09:21,296 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:09:21,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [698782952] [2021-11-03 05:09:21,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [698782952] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:09:21,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:09:21,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 05:09:21,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676714740] [2021-11-03 05:09:21,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:09:21,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:09:21,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:09:21,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:09:21,299 INFO L87 Difference]: Start difference. First operand 1205 states and 1823 transitions. Second operand has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:09:57,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:09:57,915 INFO L93 Difference]: Finished difference Result 3027 states and 4568 transitions. [2021-11-03 05:09:57,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:09:57,916 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-03 05:09:57,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:09:57,929 INFO L225 Difference]: With dead ends: 3027 [2021-11-03 05:09:57,929 INFO L226 Difference]: Without dead ends: 1843 [2021-11-03 05:09:57,931 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:09:57,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1843 states. [2021-11-03 05:09:58,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1843 to 1358. [2021-11-03 05:09:58,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 1357 states have (on average 1.524686809137804) internal successors, (2069), 1357 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:09:58,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 2069 transitions. [2021-11-03 05:09:58,009 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 2069 transitions. Word has length 117 [2021-11-03 05:09:58,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:09:58,009 INFO L470 AbstractCegarLoop]: Abstraction has 1358 states and 2069 transitions. [2021-11-03 05:09:58,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.142857142857142) internal successors, (141), 7 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:09:58,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 2069 transitions. [2021-11-03 05:09:58,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-03 05:09:58,013 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:09:58,013 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:09:58,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 05:09:58,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:09:58,230 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:09:58,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:09:58,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1633742857, now seen corresponding path program 1 times [2021-11-03 05:09:58,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:09:58,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1386784951] [2021-11-03 05:09:58,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:09:58,232 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:09:58,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:09:58,234 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:09:58,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2ca4e8c-ea00-424c-81a3-9cbfca225bbb/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 05:10:00,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:10:00,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:10:00,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:10:00,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:10:00,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:10:00,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:10:00,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:10:00,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:10:00,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:10:00,713 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 05:10:00,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-03 05:10:00,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:10:00,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:10:00,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:10:01,114 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 05:10:01,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-03 05:10:03,453 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:10:03,453 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