./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs --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 1fcf2e3f406244358dbdc63025b5201d61a26c4305d0f5c4a6ff65bb76c78282 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:31:06,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:31:06,381 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:31:06,420 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:31:06,421 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:31:06,422 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:31:06,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:31:06,428 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:31:06,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:31:06,433 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:31:06,434 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:31:06,436 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:31:06,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:31:06,439 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:31:06,441 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:31:06,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:31:06,445 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:31:06,446 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:31:06,449 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:31:06,453 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:31:06,456 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:31:06,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:31:06,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:31:06,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:31:06,466 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:31:06,467 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:31:06,467 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:31:06,469 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:31:06,470 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:31:06,471 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:31:06,472 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:31:06,473 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:31:06,474 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:31:06,476 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:31:06,478 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:31:06,478 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:31:06,479 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:31:06,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:31:06,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:31:06,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:31:06,483 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:31:06,485 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:31:06,516 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:31:06,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:31:06,518 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:31:06,519 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:31:06,519 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:31:06,520 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:31:06,520 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:31:06,521 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:31:06,521 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:31:06,522 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:31:06,522 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:31:06,523 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:31:06,523 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:31:06,524 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:31:06,524 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:31:06,525 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:31:06,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:31:06,526 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:31:06,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:31:06,527 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:31:06,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:31:06,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:31:06,528 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:31:06,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:31:06,529 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:31:06,529 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:31:06,530 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:31:06,530 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:31:06,530 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:31:06,531 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:31:06,531 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:31:06,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:31:06,531 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:31:06,532 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:31:06,532 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:31:06,532 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:31:06,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:31:06,533 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:31:06,533 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:31:06,533 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:31:06,534 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_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fcf2e3f406244358dbdc63025b5201d61a26c4305d0f5c4a6ff65bb76c78282 [2021-11-19 14:31:06,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:31:06,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:31:06,957 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:31:06,959 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:31:06,960 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:31:06,962 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c [2021-11-19 14:31:07,061 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/data/07a041d56/7a3ed0afcbbc4c288722dd06d738adf0/FLAG2ff4ea0dc [2021-11-19 14:31:07,854 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:31:07,855 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c [2021-11-19 14:31:07,882 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/data/07a041d56/7a3ed0afcbbc4c288722dd06d738adf0/FLAG2ff4ea0dc [2021-11-19 14:31:07,975 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/data/07a041d56/7a3ed0afcbbc4c288722dd06d738adf0 [2021-11-19 14:31:07,978 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:31:07,981 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:31:07,985 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:31:07,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:31:07,990 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:31:07,991 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:31:07" (1/1) ... [2021-11-19 14:31:07,994 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ea80459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:07, skipping insertion in model container [2021-11-19 14:31:07,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:31:07" (1/1) ... [2021-11-19 14:31:08,005 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:31:08,109 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:31:08,633 WARN L230 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_c595cf91-4fcf-45f8-9136-1edab72bfe5e/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c[78520,78533] [2021-11-19 14:31:08,645 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:31:08,664 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) [2021-11-19 14:31:08,665 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@27f131c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:08, skipping insertion in model container [2021-11-19 14:31:08,665 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:31:08,666 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:31:08,668 INFO L158 Benchmark]: Toolchain (without parser) took 685.94ms. Allocated memory is still 134.2MB. Free memory was 95.1MB in the beginning and 96.8MB in the end (delta: -1.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-19 14:31:08,669 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 134.2MB. Free memory was 107.0MB in the beginning and 107.0MB in the end (delta: 21.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:31:08,671 INFO L158 Benchmark]: CACSL2BoogieTranslator took 680.40ms. Allocated memory is still 134.2MB. Free memory was 95.1MB in the beginning and 96.8MB in the end (delta: -1.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-19 14:31:08,673 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 134.2MB. Free memory was 107.0MB in the beginning and 107.0MB in the end (delta: 21.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 680.40ms. Allocated memory is still 134.2MB. Free memory was 95.1MB in the beginning and 96.8MB in the end (delta: -1.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * 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_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs --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 1fcf2e3f406244358dbdc63025b5201d61a26c4305d0f5c4a6ff65bb76c78282 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:31:11,524 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:31:11,527 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:31:11,564 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:31:11,565 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:31:11,567 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:31:11,570 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:31:11,573 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:31:11,579 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:31:11,586 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:31:11,587 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:31:11,589 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:31:11,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:31:11,591 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:31:11,593 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:31:11,595 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:31:11,596 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:31:11,602 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:31:11,608 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:31:11,618 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:31:11,630 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:31:11,633 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:31:11,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:31:11,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:31:11,648 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:31:11,648 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:31:11,649 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:31:11,650 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:31:11,651 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:31:11,652 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:31:11,653 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:31:11,654 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:31:11,655 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:31:11,661 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:31:11,665 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:31:11,665 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:31:11,666 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:31:11,667 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:31:11,667 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:31:11,669 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:31:11,670 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:31:11,677 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:31:11,731 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:31:11,731 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:31:11,733 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:31:11,733 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:31:11,733 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:31:11,734 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:31:11,734 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:31:11,734 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:31:11,735 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:31:11,735 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:31:11,738 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:31:11,738 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:31:11,739 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:31:11,739 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:31:11,739 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:31:11,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:31:11,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:31:11,740 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:31:11,741 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:31:11,741 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:31:11,741 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:31:11,742 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:31:11,742 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:31:11,742 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:31:11,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:31:11,743 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:31:11,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:31:11,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:31:11,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:31:11,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:31:11,745 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:31:11,745 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:31:11,745 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:31:11,746 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:31:11,746 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:31:11,747 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:31:11,747 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_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fcf2e3f406244358dbdc63025b5201d61a26c4305d0f5c4a6ff65bb76c78282 [2021-11-19 14:31:12,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:31:12,265 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:31:12,270 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:31:12,272 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:31:12,273 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:31:12,276 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c [2021-11-19 14:31:12,368 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/data/33a0ac284/c4d1d26b80e646a79359da4d412a464b/FLAG2896cf6a2 [2021-11-19 14:31:13,230 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:31:13,236 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c [2021-11-19 14:31:13,277 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/data/33a0ac284/c4d1d26b80e646a79359da4d412a464b/FLAG2896cf6a2 [2021-11-19 14:31:13,390 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/data/33a0ac284/c4d1d26b80e646a79359da4d412a464b [2021-11-19 14:31:13,395 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:31:13,398 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:31:13,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:31:13,401 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:31:13,405 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:31:13,406 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:31:13" (1/1) ... [2021-11-19 14:31:13,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55340a37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:13, skipping insertion in model container [2021-11-19 14:31:13,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:31:13" (1/1) ... [2021-11-19 14:31:13,418 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:31:13,517 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:31:14,126 WARN L230 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_c595cf91-4fcf-45f8-9136-1edab72bfe5e/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c[78520,78533] [2021-11-19 14:31:14,140 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:31:14,182 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:31:14,198 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:31:14,334 WARN L230 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_c595cf91-4fcf-45f8-9136-1edab72bfe5e/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c[78520,78533] [2021-11-19 14:31:14,338 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:31:14,353 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:31:14,538 WARN L230 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_c595cf91-4fcf-45f8-9136-1edab72bfe5e/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c[78520,78533] [2021-11-19 14:31:14,551 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:31:14,579 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:31:14,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:14 WrapperNode [2021-11-19 14:31:14,580 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:31:14,582 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:31:14,582 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:31:14,582 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:31:14,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:14" (1/1) ... [2021-11-19 14:31:14,645 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:14" (1/1) ... [2021-11-19 14:31:14,725 INFO L137 Inliner]: procedures = 36, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 784 [2021-11-19 14:31:14,725 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:31:14,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:31:14,727 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:31:14,727 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:31:14,738 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:14" (1/1) ... [2021-11-19 14:31:14,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:14" (1/1) ... [2021-11-19 14:31:14,750 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:14" (1/1) ... [2021-11-19 14:31:14,751 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:14" (1/1) ... [2021-11-19 14:31:14,804 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:14" (1/1) ... [2021-11-19 14:31:14,816 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:14" (1/1) ... [2021-11-19 14:31:14,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:14" (1/1) ... [2021-11-19 14:31:14,828 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:31:14,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:31:14,840 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:31:14,841 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:31:14,846 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:14" (1/1) ... [2021-11-19 14:31:14,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:31:14,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:31:14,883 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:31:14,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:31:14,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:31:14,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:31:14,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 14:31:14,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 14:31:14,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 14:31:14,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 14:31:14,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 14:31:14,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:31:14,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:31:14,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 14:31:15,251 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:31:15,253 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:31:15,284 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 14:31:27,184 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-19 14:31:27,185 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-19 14:31:27,185 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:31:27,197 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:31:27,197 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:31:27,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:31:27 BoogieIcfgContainer [2021-11-19 14:31:27,200 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:31:27,202 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:31:27,203 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:31:27,206 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:31:27,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:31:13" (1/3) ... [2021-11-19 14:31:27,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41edc67e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:31:27, skipping insertion in model container [2021-11-19 14:31:27,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:31:14" (2/3) ... [2021-11-19 14:31:27,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41edc67e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:31:27, skipping insertion in model container [2021-11-19 14:31:27,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:31:27" (3/3) ... [2021-11-19 14:31:27,210 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.06.i.cil-1.c [2021-11-19 14:31:27,217 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:31:27,217 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:31:27,310 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:31:27,329 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 [2021-11-19 14:31:27,339 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:31:27,369 INFO L276 IsEmpty]: Start isEmpty. Operand has 161 states, 159 states have (on average 1.7358490566037736) internal successors, (276), 160 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:31:27,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-19 14:31:27,387 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:27,388 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:31:27,389 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:31:27,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:27,396 INFO L85 PathProgramCache]: Analyzing trace with hash -2069453275, now seen corresponding path program 1 times [2021-11-19 14:31:27,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:27,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [408552488] [2021-11-19 14:31:27,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:27,418 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:27,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:27,424 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:27,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:31:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:27,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:31:27,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:28,103 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 [2021-11-19 14:31:28,119 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 [2021-11-19 14:31:28,335 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:31:28,340 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-19 14:31:28,352 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:31:28,356 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-19 14:31:28,383 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 [2021-11-19 14:31:29,131 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-19 14:31:29,132 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 1289 treesize of output 1241 [2021-11-19 14:31:29,340 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:31:29,344 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-19 14:31:29,355 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:31:29,366 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-19 14:31:29,394 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 [2021-11-19 14:31:29,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 49 [2021-11-19 14:31:29,770 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-19 14:31:29,771 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 [2021-11-19 14:31:29,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:29,808 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 [2021-11-19 14:31:29,855 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 [2021-11-19 14:31:29,860 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 [2021-11-19 14:31:30,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:31:30,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:31:30,326 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:31:30,331 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-19 14:31:30,338 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:31:30,341 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-19 14:31:30,531 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:31:30,534 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-19 14:31:30,544 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:31:30,547 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-19 14:31:30,562 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:31:30,566 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-19 14:31:30,588 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:31:30,593 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-19 14:31:30,647 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:31:30,653 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-19 14:31:30,700 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 14:31:30,705 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-19 14:31:31,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:31:31,406 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:31:31,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [408552488] [2021-11-19 14:31:31,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [408552488] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:31:31,408 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:31:31,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 14:31:31,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972677823] [2021-11-19 14:31:31,411 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:31:31,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:31:31,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:31:31,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:31:31,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:31:31,453 INFO L87 Difference]: Start difference. First operand has 161 states, 159 states have (on average 1.7358490566037736) internal successors, (276), 160 states have internal predecessors, (276), 0 states have call successors, (0), 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 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:31:33,502 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:31:35,514 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:31:36,688 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:31:38,994 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:31:40,125 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:31:45,074 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:31:48,401 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:31:50,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:31:50,066 INFO L93 Difference]: Finished difference Result 323 states and 551 transitions. [2021-11-19 14:31:50,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:31:50,084 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-19 14:31:50,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:31:50,103 INFO L225 Difference]: With dead ends: 323 [2021-11-19 14:31:50,103 INFO L226 Difference]: Without dead ends: 148 [2021-11-19 14:31:50,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:31:50,115 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 8 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 18.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:31:50,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 1082 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 218 Invalid, 3 Unknown, 65 Unchecked, 18.5s Time] [2021-11-19 14:31:50,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-19 14:31:50,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-11-19 14:31:50,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5714285714285714) internal successors, (231), 147 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:31:50,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 231 transitions. [2021-11-19 14:31:50,199 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 231 transitions. Word has length 46 [2021-11-19 14:31:50,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:31:50,200 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 231 transitions. [2021-11-19 14:31:50,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:31:50,203 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 231 transitions. [2021-11-19 14:31:50,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-19 14:31:50,212 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:31:50,213 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:31:50,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:31:50,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:31:50,432 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:31:50,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:31:50,433 INFO L85 PathProgramCache]: Analyzing trace with hash 176126179, now seen corresponding path program 1 times [2021-11-19 14:31:50,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:31:50,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [929014056] [2021-11-19 14:31:50,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:31:50,435 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:31:50,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:31:50,437 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:31:50,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:31:50,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:31:50,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:31:50,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:31:50,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:50,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:50,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:50,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:50,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:31:50,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:31:51,444 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 14:31:51,445 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 [2021-11-19 14:31:55,061 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 14:31:55,061 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 [2021-11-19 14:32:03,191 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 14:32:03,192 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 [2021-11-19 14:32:03,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:32:03,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:32:11,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:32:11,660 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:32:11,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [929014056] [2021-11-19 14:32:11,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [929014056] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:32:11,661 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:32:11,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 6 [2021-11-19 14:32:11,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170196994] [2021-11-19 14:32:11,662 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:32:11,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:32:11,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:32:11,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:32:11,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=15, Unknown=3, NotChecked=0, Total=30 [2021-11-19 14:32:11,665 INFO L87 Difference]: Start difference. First operand 148 states and 231 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:32:13,693 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:32:18,916 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:32:21,327 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:32:21,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:32:21,970 INFO L93 Difference]: Finished difference Result 301 states and 473 transitions. [2021-11-19 14:32:21,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:32:21,974 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 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 46 [2021-11-19 14:32:21,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:32:21,977 INFO L225 Difference]: With dead ends: 301 [2021-11-19 14:32:21,977 INFO L226 Difference]: Without dead ends: 163 [2021-11-19 14:32:21,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=12, Invalid=15, Unknown=3, NotChecked=0, Total=30 [2021-11-19 14:32:21,980 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 38 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:32:21,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 552 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 2 Unknown, 18 Unchecked, 10.3s Time] [2021-11-19 14:32:21,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-19 14:32:21,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2021-11-19 14:32:21,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.5822784810126582) internal successors, (250), 158 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:32:21,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 250 transitions. [2021-11-19 14:32:21,997 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 250 transitions. Word has length 46 [2021-11-19 14:32:21,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:32:21,998 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 250 transitions. [2021-11-19 14:32:21,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:32:21,999 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 250 transitions. [2021-11-19 14:32:22,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-19 14:32:22,001 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:32:22,002 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:32:22,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:32:22,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:32:22,212 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:32:22,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:32:22,213 INFO L85 PathProgramCache]: Analyzing trace with hash 755663040, now seen corresponding path program 1 times [2021-11-19 14:32:22,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:32:22,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1906478823] [2021-11-19 14:32:22,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:32:22,214 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:32:22,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:32:22,222 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:32:22,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:32:22,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:32:22,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:32:22,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:22,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:22,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:22,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:22,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:22,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:22,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:32:23,265 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 14:32:23,266 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 [2021-11-19 14:32:26,725 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 14:32:26,726 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 [2021-11-19 14:32:34,342 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 14:32:34,346 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 [2021-11-19 14:32:34,493 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:32:34,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:32:34,866 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:32:34,866 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:32:34,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1906478823] [2021-11-19 14:32:34,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1906478823] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:32:34,867 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:32:34,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:32:34,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527274473] [2021-11-19 14:32:34,868 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:32:34,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:32:34,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:32:34,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:32:34,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:32:34,870 INFO L87 Difference]: Start difference. First operand 159 states and 250 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) [2021-11-19 14:32:36,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:32:36,022 INFO L93 Difference]: Finished difference Result 299 states and 470 transitions. [2021-11-19 14:32:36,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:32:36,023 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 59 [2021-11-19 14:32:36,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:32:36,026 INFO L225 Difference]: With dead ends: 299 [2021-11-19 14:32:36,026 INFO L226 Difference]: Without dead ends: 161 [2021-11-19 14:32:36,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:32:36,029 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 20 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:32:36,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 906 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 103 Unchecked, 1.1s Time] [2021-11-19 14:32:36,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-19 14:32:36,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2021-11-19 14:32:36,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.5759493670886076) internal successors, (249), 158 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:32:36,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 249 transitions. [2021-11-19 14:32:36,045 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 249 transitions. Word has length 59 [2021-11-19 14:32:36,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:32:36,046 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 249 transitions. [2021-11-19 14:32:36,046 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) [2021-11-19 14:32:36,047 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 249 transitions. [2021-11-19 14:32:36,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-19 14:32:36,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:32:36,050 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:32:36,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:32:36,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:32:36,260 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:32:36,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:32:36,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1854767371, now seen corresponding path program 1 times [2021-11-19 14:32:36,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:32:36,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1080440252] [2021-11-19 14:32:36,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:32:36,267 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:32:36,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:32:36,268 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:32:36,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:32:37,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:32:37,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:32:37,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:37,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:37,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:37,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:37,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:37,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:37,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:32:37,576 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 14:32:37,577 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 [2021-11-19 14:32:41,077 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 14:32:41,077 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 [2021-11-19 14:32:47,819 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 14:32:47,820 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 [2021-11-19 14:32:47,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:32:47,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:32:48,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:32:48,372 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:32:48,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1080440252] [2021-11-19 14:32:48,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1080440252] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:32:48,373 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:32:48,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:32:48,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701344271] [2021-11-19 14:32:48,375 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:32:48,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:32:48,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:32:48,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:32:48,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:32:48,377 INFO L87 Difference]: Start difference. First operand 159 states and 249 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) [2021-11-19 14:32:50,413 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:32:52,937 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:32:55,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:32:55,788 INFO L93 Difference]: Finished difference Result 308 states and 484 transitions. [2021-11-19 14:32:55,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:32:55,790 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 60 [2021-11-19 14:32:55,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:32:55,792 INFO L225 Difference]: With dead ends: 308 [2021-11-19 14:32:55,793 INFO L226 Difference]: Without dead ends: 170 [2021-11-19 14:32:55,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:32:55,795 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 27 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 28 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:32:55,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 782 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 101 Invalid, 1 Unknown, 37 Unchecked, 7.4s Time] [2021-11-19 14:32:55,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-19 14:32:55,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2021-11-19 14:32:55,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.5621301775147929) internal successors, (264), 169 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:32:55,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 264 transitions. [2021-11-19 14:32:55,814 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 264 transitions. Word has length 60 [2021-11-19 14:32:55,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:32:55,814 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 264 transitions. [2021-11-19 14:32:55,815 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) [2021-11-19 14:32:55,815 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 264 transitions. [2021-11-19 14:32:55,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-19 14:32:55,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:32:55,817 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:32:55,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:32:56,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:32:56,021 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:32:56,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:32:56,022 INFO L85 PathProgramCache]: Analyzing trace with hash 219231991, now seen corresponding path program 1 times [2021-11-19 14:32:56,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:32:56,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [940422502] [2021-11-19 14:32:56,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:32:56,023 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:32:56,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:32:56,024 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:32:56,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:32:56,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:32:56,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:32:56,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:32:56,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:56,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:56,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:56,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:56,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:32:56,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:32:57,133 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 14:32:57,134 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 [2021-11-19 14:33:00,746 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 14:33:00,747 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 [2021-11-19 14:33:07,605 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 14:33:07,606 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 [2021-11-19 14:33:07,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:33:07,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:33:08,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:33:08,173 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:33:08,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [940422502] [2021-11-19 14:33:08,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [940422502] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:33:08,174 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:33:08,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:33:08,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553710136] [2021-11-19 14:33:08,174 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:33:08,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:33:08,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:33:08,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:33:08,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:33:08,176 INFO L87 Difference]: Start difference. First operand 170 states and 264 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) [2021-11-19 14:33:10,208 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:33:13,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:33:13,347 INFO L93 Difference]: Finished difference Result 331 states and 516 transitions. [2021-11-19 14:33:13,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:33:13,349 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 60 [2021-11-19 14:33:13,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:33:13,351 INFO L225 Difference]: With dead ends: 331 [2021-11-19 14:33:13,351 INFO L226 Difference]: Without dead ends: 182 [2021-11-19 14:33:13,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:33:13,353 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 20 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:33:13,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 1021 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 100 Invalid, 1 Unknown, 203 Unchecked, 5.2s Time] [2021-11-19 14:33:13,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-19 14:33:13,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-11-19 14:33:13,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.5469613259668509) internal successors, (280), 181 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:33:13,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 280 transitions. [2021-11-19 14:33:13,369 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 280 transitions. Word has length 60 [2021-11-19 14:33:13,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:33:13,369 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 280 transitions. [2021-11-19 14:33:13,369 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) [2021-11-19 14:33:13,370 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 280 transitions. [2021-11-19 14:33:13,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-19 14:33:13,371 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:33:13,371 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:33:13,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-19 14:33:13,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:33:13,585 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:33:13,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:33:13,586 INFO L85 PathProgramCache]: Analyzing trace with hash -426584320, now seen corresponding path program 1 times [2021-11-19 14:33:13,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:33:13,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1172254723] [2021-11-19 14:33:13,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:33:13,587 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:33:13,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:33:13,588 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:33:13,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:33:14,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:33:14,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:33:14,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:33:14,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:14,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:14,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:14,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:14,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:14,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:33:14,498 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 14:33:14,499 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 [2021-11-19 14:33:18,127 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 14:33:18,127 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 [2021-11-19 14:33:25,818 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 14:33:25,819 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 [2021-11-19 14:33:25,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:33:25,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:33:26,408 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:33:26,408 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:33:26,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1172254723] [2021-11-19 14:33:26,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1172254723] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:33:26,409 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:33:26,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:33:26,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877219602] [2021-11-19 14:33:26,409 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:33:26,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:33:26,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:33:26,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:33:26,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:33:26,410 INFO L87 Difference]: Start difference. First operand 182 states and 280 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:33:28,435 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:33:32,259 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:33:32,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:33:32,329 INFO L93 Difference]: Finished difference Result 354 states and 549 transitions. [2021-11-19 14:33:32,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:33:32,332 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 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 [2021-11-19 14:33:32,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:33:32,334 INFO L225 Difference]: With dead ends: 354 [2021-11-19 14:33:32,334 INFO L226 Difference]: Without dead ends: 193 [2021-11-19 14:33:32,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:33:32,336 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 37 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 28 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:33:32,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 873 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 92 Invalid, 1 Unknown, 136 Unchecked, 5.9s Time] [2021-11-19 14:33:32,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-19 14:33:32,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2021-11-19 14:33:32,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.553191489361702) internal successors, (292), 188 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:33:32,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 292 transitions. [2021-11-19 14:33:32,350 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 292 transitions. Word has length 60 [2021-11-19 14:33:32,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:33:32,351 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 292 transitions. [2021-11-19 14:33:32,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:33:32,351 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 292 transitions. [2021-11-19 14:33:32,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-19 14:33:32,353 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:33:32,353 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:33:32,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:33:32,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:33:32,569 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:33:32,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:33:32,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1898096192, now seen corresponding path program 1 times [2021-11-19 14:33:32,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:33:32,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [587318482] [2021-11-19 14:33:32,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:33:32,570 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:33:32,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:33:32,571 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:33:32,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:33:33,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:33:33,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:33:33,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:33:33,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:33,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:33,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:33,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:33,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:33,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:33:33,525 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 14:33:33,526 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 [2021-11-19 14:33:36,951 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 14:33:36,952 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 [2021-11-19 14:33:44,426 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 14:33:44,427 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 [2021-11-19 14:33:44,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:33:44,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:33:44,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:33:44,909 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:33:44,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [587318482] [2021-11-19 14:33:44,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [587318482] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:33:44,909 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:33:44,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:33:44,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340693338] [2021-11-19 14:33:44,910 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:33:44,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:33:44,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:33:44,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:33:44,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:33:44,911 INFO L87 Difference]: Start difference. First operand 189 states and 292 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:33:46,933 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:33:53,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:33:53,489 INFO L93 Difference]: Finished difference Result 361 states and 560 transitions. [2021-11-19 14:33:53,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:33:53,491 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-19 14:33:53,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:33:53,493 INFO L225 Difference]: With dead ends: 361 [2021-11-19 14:33:53,493 INFO L226 Difference]: Without dead ends: 193 [2021-11-19 14:33:53,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:33:53,494 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 35 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:33:53,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 779 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 100 Invalid, 1 Unknown, 79 Unchecked, 8.6s Time] [2021-11-19 14:33:53,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-19 14:33:53,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2021-11-19 14:33:53,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.5425531914893618) internal successors, (290), 188 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:33:53,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 290 transitions. [2021-11-19 14:33:53,507 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 290 transitions. Word has length 60 [2021-11-19 14:33:53,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:33:53,508 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 290 transitions. [2021-11-19 14:33:53,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:33:53,508 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 290 transitions. [2021-11-19 14:33:53,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-19 14:33:53,509 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:33:53,510 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:33:53,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-19 14:33:53,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:33:53,713 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:33:53,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:33:53,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1920769353, now seen corresponding path program 1 times [2021-11-19 14:33:53,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:33:53,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1385632333] [2021-11-19 14:33:53,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:33:53,715 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:33:53,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:33:53,716 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:33:53,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:33:54,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:33:54,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:33:54,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:33:54,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:54,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:54,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:54,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:54,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:33:54,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:33:54,660 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 14:33:54,660 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 [2021-11-19 14:33:58,069 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 14:33:58,070 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 [2021-11-19 14:34:05,207 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 14:34:05,207 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 [2021-11-19 14:34:05,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:34:05,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:05,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:34:05,787 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:05,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1385632333] [2021-11-19 14:34:05,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1385632333] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:05,788 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:34:05,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:34:05,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886574629] [2021-11-19 14:34:05,789 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:05,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:34:05,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:05,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:34:05,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:34:05,791 INFO L87 Difference]: Start difference. First operand 189 states and 290 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) [2021-11-19 14:34:07,820 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:10,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:10,675 INFO L93 Difference]: Finished difference Result 358 states and 555 transitions. [2021-11-19 14:34:10,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:34:10,678 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 61 [2021-11-19 14:34:10,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:10,680 INFO L225 Difference]: With dead ends: 358 [2021-11-19 14:34:10,680 INFO L226 Difference]: Without dead ends: 190 [2021-11-19 14:34:10,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:34:10,681 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 27 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:10,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 565 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 88 Invalid, 1 Unknown, 36 Unchecked, 4.9s Time] [2021-11-19 14:34:10,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-19 14:34:10,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2021-11-19 14:34:10,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.5343915343915344) internal successors, (290), 189 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:34:10,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 290 transitions. [2021-11-19 14:34:10,693 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 290 transitions. Word has length 61 [2021-11-19 14:34:10,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:10,694 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 290 transitions. [2021-11-19 14:34:10,694 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) [2021-11-19 14:34:10,694 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 290 transitions. [2021-11-19 14:34:10,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-19 14:34:10,695 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:10,696 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:34:10,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:10,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:10,915 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:10,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:10,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1011603538, now seen corresponding path program 1 times [2021-11-19 14:34:10,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:10,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1839910628] [2021-11-19 14:34:10,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:10,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:10,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:10,917 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:10,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:34:11,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:11,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:34:11,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:11,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:11,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:11,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:11,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:11,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:11,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:34:11,978 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 14:34:11,978 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 [2021-11-19 14:34:15,362 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 14:34:15,363 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 [2021-11-19 14:34:22,393 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 14:34:22,397 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 [2021-11-19 14:34:22,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:34:22,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:22,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:34:22,841 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:22,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1839910628] [2021-11-19 14:34:22,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1839910628] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:22,841 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:34:22,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:34:22,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183202459] [2021-11-19 14:34:22,842 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:22,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:34:22,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:22,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:34:22,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:34:22,843 INFO L87 Difference]: Start difference. First operand 190 states and 290 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:34:23,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:23,785 INFO L93 Difference]: Finished difference Result 359 states and 554 transitions. [2021-11-19 14:34:23,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:34:23,785 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-19 14:34:23,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:23,787 INFO L225 Difference]: With dead ends: 359 [2021-11-19 14:34:23,787 INFO L226 Difference]: Without dead ends: 190 [2021-11-19 14:34:23,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:34:23,789 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 10 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:23,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 915 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 102 Unchecked, 0.9s Time] [2021-11-19 14:34:23,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-19 14:34:23,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2021-11-19 14:34:23,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.529100529100529) internal successors, (289), 189 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:34:23,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 289 transitions. [2021-11-19 14:34:23,800 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 289 transitions. Word has length 62 [2021-11-19 14:34:23,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:23,801 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 289 transitions. [2021-11-19 14:34:23,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:34:23,801 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 289 transitions. [2021-11-19 14:34:23,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-19 14:34:23,803 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:23,803 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:34:23,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:24,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:24,017 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:24,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:24,017 INFO L85 PathProgramCache]: Analyzing trace with hash -2021179534, now seen corresponding path program 1 times [2021-11-19 14:34:24,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:24,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [665866508] [2021-11-19 14:34:24,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:24,018 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:24,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:24,019 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:24,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:34:24,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:24,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:34:24,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:24,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:24,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:24,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:24,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:24,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:24,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:34:25,034 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-19 14:34:25,034 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 [2021-11-19 14:34:28,375 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-19 14:34:28,375 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 [2021-11-19 14:34:35,544 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-19 14:34:35,544 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 [2021-11-19 14:34:35,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:34:35,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:36,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:34:36,013 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:36,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [665866508] [2021-11-19 14:34:36,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [665866508] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:36,014 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:34:36,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:34:36,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328495428] [2021-11-19 14:34:36,014 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:36,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:34:36,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:36,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:34:36,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:34:36,016 INFO L87 Difference]: Start difference. First operand 190 states and 289 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:34:36,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:36,834 INFO L93 Difference]: Finished difference Result 359 states and 553 transitions. [2021-11-19 14:34:36,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:34:36,834 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 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 63 [2021-11-19 14:34:36,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:36,836 INFO L225 Difference]: With dead ends: 359 [2021-11-19 14:34:36,836 INFO L226 Difference]: Without dead ends: 190 [2021-11-19 14:34:36,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-19 14:34:36,838 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 10 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:36,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 692 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 101 Unchecked, 0.8s Time] [2021-11-19 14:34:36,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-19 14:34:36,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2021-11-19 14:34:36,862 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) [2021-11-19 14:34:36,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 288 transitions. [2021-11-19 14:34:36,869 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 288 transitions. Word has length 63 [2021-11-19 14:34:36,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:36,870 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 288 transitions. [2021-11-19 14:34:36,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:34:36,870 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 288 transitions. [2021-11-19 14:34:36,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-19 14:34:36,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:36,871 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:34:36,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:34:37,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:37,081 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:37,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:37,081 INFO L85 PathProgramCache]: Analyzing trace with hash 485580554, now seen corresponding path program 1 times [2021-11-19 14:34:37,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:37,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2102463032] [2021-11-19 14:34:37,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:37,082 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:37,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:37,083 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:37,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:34:37,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:37,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:34:37,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:37,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:37,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:37,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:37,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:37,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:37,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:37,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:37,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:37,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:37,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:37,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:37,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:37,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:37,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:34:37,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:34:37,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:34:37,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:34:37,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:34:37,939 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 14:34:37,939 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 [2021-11-19 14:34:39,011 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:34:39,011 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 [2021-11-19 14:34:39,086 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:34:39,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:39,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:34:39,346 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:39,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2102463032] [2021-11-19 14:34:39,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2102463032] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:39,347 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:34:39,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:34:39,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443380593] [2021-11-19 14:34:39,347 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:39,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:34:39,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:39,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:34:39,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:34:39,348 INFO L87 Difference]: Start difference. First operand 190 states and 288 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:34:41,366 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:44,576 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:45,928 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:49,597 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:51,332 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:52,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:34:52,029 INFO L93 Difference]: Finished difference Result 400 states and 611 transitions. [2021-11-19 14:34:52,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:34:52,032 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 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 63 [2021-11-19 14:34:52,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:34:52,034 INFO L225 Difference]: With dead ends: 400 [2021-11-19 14:34:52,034 INFO L226 Difference]: Without dead ends: 231 [2021-11-19 14:34:52,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:34:52,035 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 58 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:34:52,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 559 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 162 Invalid, 1 Unknown, 0 Unchecked, 12.6s Time] [2021-11-19 14:34:52,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-19 14:34:52,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 212. [2021-11-19 14:34:52,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.5213270142180095) internal successors, (321), 211 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) [2021-11-19 14:34:52,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 321 transitions. [2021-11-19 14:34:52,061 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 321 transitions. Word has length 63 [2021-11-19 14:34:52,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:34:52,064 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 321 transitions. [2021-11-19 14:34:52,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:34:52,064 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 321 transitions. [2021-11-19 14:34:52,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-19 14:34:52,065 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:34:52,065 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:34:52,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-19 14:34:52,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:34:52,273 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:34:52,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:34:52,273 INFO L85 PathProgramCache]: Analyzing trace with hash 103289337, now seen corresponding path program 1 times [2021-11-19 14:34:52,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:34:52,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1169209307] [2021-11-19 14:34:52,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:34:52,274 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:34:52,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:34:52,275 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:34:52,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:34:52,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:34:52,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:34:52,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:34:52,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:52,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:52,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:52,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:52,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:52,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:52,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:52,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:52,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:52,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:52,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:52,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:52,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:34:52,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:34:52,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:34:52,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:34:52,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:34:52,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:34:53,122 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 14:34:53,123 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 [2021-11-19 14:34:53,812 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:34:53,813 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 [2021-11-19 14:34:53,923 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:34:53,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:34:54,200 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:34:54,201 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:34:54,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1169209307] [2021-11-19 14:34:54,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1169209307] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:34:54,201 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:34:54,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:34:54,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102544432] [2021-11-19 14:34:54,201 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:34:54,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:34:54,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:34:54,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:34:54,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:34:54,203 INFO L87 Difference]: Start difference. First operand 212 states and 321 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:34:56,233 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:34:58,242 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:07,000 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:09,687 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:12,234 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:13,365 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:14,644 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:15,864 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:19,851 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:21,123 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:26,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:35:26,944 INFO L93 Difference]: Finished difference Result 543 states and 834 transitions. [2021-11-19 14:35:26,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:35:26,947 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 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 76 [2021-11-19 14:35:26,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:35:26,950 INFO L225 Difference]: With dead ends: 543 [2021-11-19 14:35:26,951 INFO L226 Difference]: Without dead ends: 352 [2021-11-19 14:35:26,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:35:26,952 INFO L933 BasicCegarLoop]: 283 mSDtfsCounter, 195 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 48 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:35:26,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 1207 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 545 Invalid, 3 Unknown, 0 Unchecked, 32.6s Time] [2021-11-19 14:35:26,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-19 14:35:26,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 228. [2021-11-19 14:35:26,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.5110132158590308) internal successors, (343), 227 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:35:26,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 343 transitions. [2021-11-19 14:35:26,967 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 343 transitions. Word has length 76 [2021-11-19 14:35:26,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:35:26,968 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 343 transitions. [2021-11-19 14:35:26,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:35:26,968 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 343 transitions. [2021-11-19 14:35:26,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-19 14:35:26,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:35:26,970 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:35:26,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-19 14:35:27,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:35:27,189 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:35:27,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:35:27,190 INFO L85 PathProgramCache]: Analyzing trace with hash 873631865, now seen corresponding path program 1 times [2021-11-19 14:35:27,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:35:27,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [185716258] [2021-11-19 14:35:27,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:35:27,191 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:35:27,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:35:27,192 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:35:27,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:35:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:35:27,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:35:27,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:35:27,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:27,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:27,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:27,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:27,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:27,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:27,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:27,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:27,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:27,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:27,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:27,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:27,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:35:27,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:35:27,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:35:27,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:35:27,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:35:27,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:35:28,228 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 14:35:28,228 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 [2021-11-19 14:35:28,854 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:35:28,854 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 [2021-11-19 14:35:28,999 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:35:29,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:35:29,291 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:35:29,292 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:35:29,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [185716258] [2021-11-19 14:35:29,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [185716258] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:35:29,292 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:35:29,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:35:29,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098278193] [2021-11-19 14:35:29,292 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:35:29,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:35:29,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:35:29,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:35:29,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:35:29,293 INFO L87 Difference]: Start difference. First operand 228 states and 343 transitions. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:35:31,314 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:38,953 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:45,788 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:47,009 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:49,023 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:52,847 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:57,596 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:59,531 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:35:59,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:35:59,661 INFO L93 Difference]: Finished difference Result 563 states and 856 transitions. [2021-11-19 14:35:59,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:35:59,662 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 0 states have call successors, (0), 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 79 [2021-11-19 14:35:59,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:35:59,666 INFO L225 Difference]: With dead ends: 563 [2021-11-19 14:35:59,666 INFO L226 Difference]: Without dead ends: 356 [2021-11-19 14:35:59,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:35:59,668 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 202 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 67 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:35:59,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 666 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 447 Invalid, 3 Unknown, 0 Unchecked, 30.2s Time] [2021-11-19 14:35:59,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-11-19 14:35:59,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 253. [2021-11-19 14:35:59,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.4880952380952381) internal successors, (375), 252 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:35:59,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 375 transitions. [2021-11-19 14:35:59,682 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 375 transitions. Word has length 79 [2021-11-19 14:35:59,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:35:59,683 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 375 transitions. [2021-11-19 14:35:59,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:35:59,684 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 375 transitions. [2021-11-19 14:35:59,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-19 14:35:59,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:35:59,685 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:35:59,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-19 14:35:59,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:35:59,901 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:35:59,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:35:59,902 INFO L85 PathProgramCache]: Analyzing trace with hash -2003334101, now seen corresponding path program 1 times [2021-11-19 14:35:59,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:35:59,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [6970609] [2021-11-19 14:35:59,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:35:59,903 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:35:59,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:35:59,905 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:35:59,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:36:00,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:36:00,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:36:00,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:36:00,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:00,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:00,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:00,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:00,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:00,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:00,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:00,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:00,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:00,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:00,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:00,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:00,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:00,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:36:00,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:36:00,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:36:00,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:36:00,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:36:01,011 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 14:36:01,012 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 [2021-11-19 14:36:01,707 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:36:01,708 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 [2021-11-19 14:36:01,847 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:36:01,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:36:02,153 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:36:02,153 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:36:02,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [6970609] [2021-11-19 14:36:02,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [6970609] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:36:02,154 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:36:02,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:36:02,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737108079] [2021-11-19 14:36:02,155 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:36:02,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:36:02,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:36:02,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:36:02,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:36:02,157 INFO L87 Difference]: Start difference. First operand 253 states and 375 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:36:04,194 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:09,208 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:12,836 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:14,981 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:16,864 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:19,173 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:20,472 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:22,048 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:23,463 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:26,602 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:28,821 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:31,450 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:32,584 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:35,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:36:35,075 INFO L93 Difference]: Finished difference Result 589 states and 892 transitions. [2021-11-19 14:36:35,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:36:35,077 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 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 80 [2021-11-19 14:36:35,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:36:35,079 INFO L225 Difference]: With dead ends: 589 [2021-11-19 14:36:35,079 INFO L226 Difference]: Without dead ends: 357 [2021-11-19 14:36:35,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:36:35,080 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 188 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:36:35,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 744 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 489 Invalid, 1 Unknown, 0 Unchecked, 32.8s Time] [2021-11-19 14:36:35,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-11-19 14:36:35,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 242. [2021-11-19 14:36:35,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.4813278008298756) internal successors, (357), 241 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:36:35,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 357 transitions. [2021-11-19 14:36:35,101 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 357 transitions. Word has length 80 [2021-11-19 14:36:35,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:36:35,101 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 357 transitions. [2021-11-19 14:36:35,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:36:35,102 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 357 transitions. [2021-11-19 14:36:35,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-19 14:36:35,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:36:35,103 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:36:35,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:36:35,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:36:35,317 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:36:35,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:36:35,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1965557864, now seen corresponding path program 1 times [2021-11-19 14:36:35,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:36:35,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1827024010] [2021-11-19 14:36:35,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:36:35,319 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:36:35,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:36:35,319 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:36:35,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:36:35,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:36:35,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:36:35,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:36:35,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:35,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:35,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:35,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:35,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:36:35,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:36:35,997 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:36:35,998 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 [2021-11-19 14:36:36,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:36:36,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:36:36,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:36:36,409 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:36:36,409 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 [2021-11-19 14:36:38,814 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:36:38,814 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 [2021-11-19 14:36:38,853 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:36:38,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:36:39,275 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:36:39,275 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:36:39,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1827024010] [2021-11-19 14:36:39,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1827024010] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:36:39,275 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:36:39,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:36:39,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672779817] [2021-11-19 14:36:39,276 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:36:39,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:36:39,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:36:39,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:36:39,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:36:39,277 INFO L87 Difference]: Start difference. First operand 242 states and 357 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:36:41,298 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:43,869 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:53,644 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:58,178 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:36:59,483 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:03,516 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:07,671 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:11,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:37:11,874 INFO L93 Difference]: Finished difference Result 706 states and 1063 transitions. [2021-11-19 14:37:11,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:37:11,875 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-19 14:37:11,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:37:11,879 INFO L225 Difference]: With dead ends: 706 [2021-11-19 14:37:11,879 INFO L226 Difference]: Without dead ends: 485 [2021-11-19 14:37:11,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:37:11,882 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 438 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 86 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:37:11,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 768 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 515 Invalid, 3 Unknown, 0 Unchecked, 32.5s Time] [2021-11-19 14:37:11,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-11-19 14:37:11,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 296. [2021-11-19 14:37:11,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 1.505084745762712) internal successors, (444), 295 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:37:11,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 444 transitions. [2021-11-19 14:37:11,900 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 444 transitions. Word has length 85 [2021-11-19 14:37:11,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:37:11,901 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 444 transitions. [2021-11-19 14:37:11,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:37:11,901 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 444 transitions. [2021-11-19 14:37:11,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-19 14:37:11,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:37:11,903 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:37:11,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:37:12,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:37:12,123 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:37:12,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:37:12,124 INFO L85 PathProgramCache]: Analyzing trace with hash -660899661, now seen corresponding path program 1 times [2021-11-19 14:37:12,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:37:12,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1327030615] [2021-11-19 14:37:12,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:37:12,125 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:37:12,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:37:12,126 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:37:12,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:37:12,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:37:12,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:37:12,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:37:12,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:12,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:12,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:12,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:12,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:12,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:37:12,925 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:37:12,925 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 [2021-11-19 14:37:12,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:37:12,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:37:12,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:37:13,338 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:37:13,339 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 [2021-11-19 14:37:15,853 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:37:15,853 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 [2021-11-19 14:37:15,905 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:37:15,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:37:16,363 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:37:16,363 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:37:16,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1327030615] [2021-11-19 14:37:16,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1327030615] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:37:16,363 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:37:16,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:37:16,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481263221] [2021-11-19 14:37:16,364 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:37:16,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:37:16,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:37:16,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:37:16,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:37:16,365 INFO L87 Difference]: Start difference. First operand 296 states and 444 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:37:18,389 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:20,402 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:22,574 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:27,994 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:35,279 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:37,294 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:39,837 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:46,702 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:48,733 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:50,747 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:37:53,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:37:53,689 INFO L93 Difference]: Finished difference Result 771 states and 1176 transitions. [2021-11-19 14:37:53,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:37:53,691 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 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 86 [2021-11-19 14:37:53,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:37:53,694 INFO L225 Difference]: With dead ends: 771 [2021-11-19 14:37:53,694 INFO L226 Difference]: Without dead ends: 496 [2021-11-19 14:37:53,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:37:53,696 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 335 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 82 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:37:53,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 789 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 528 Invalid, 5 Unknown, 0 Unchecked, 37.2s Time] [2021-11-19 14:37:53,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-11-19 14:37:53,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 318. [2021-11-19 14:37:53,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 1.5362776025236593) internal successors, (487), 317 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:37:53,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 487 transitions. [2021-11-19 14:37:53,712 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 487 transitions. Word has length 86 [2021-11-19 14:37:53,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:37:53,713 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 487 transitions. [2021-11-19 14:37:53,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:37:53,714 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 487 transitions. [2021-11-19 14:37:53,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-19 14:37:53,716 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:37:53,716 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:37:53,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:37:53,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:37:53,937 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:37:53,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:37:53,938 INFO L85 PathProgramCache]: Analyzing trace with hash -933853586, now seen corresponding path program 1 times [2021-11-19 14:37:53,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:37:53,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [809383654] [2021-11-19 14:37:53,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:37:53,939 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:37:53,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:37:53,940 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:37:53,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:37:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:37:54,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:37:54,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:37:54,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:54,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:54,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:54,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:54,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:37:54,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:37:55,010 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:37:55,010 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 [2021-11-19 14:37:55,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:37:55,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:37:55,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:37:55,515 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:37:55,515 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 [2021-11-19 14:37:57,346 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:37:57,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-19 14:37:57,493 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:37:57,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:37:58,021 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:37:58,021 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:37:58,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [809383654] [2021-11-19 14:37:58,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [809383654] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:37:58,021 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:37:58,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:37:58,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955737786] [2021-11-19 14:37:58,022 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:37:58,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:37:58,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:37:58,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:37:58,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:37:58,024 INFO L87 Difference]: Start difference. First operand 318 states and 487 transitions. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:38:00,046 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:07,348 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:14,490 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:15,600 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:17,581 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:22,891 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:24,144 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:26,040 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:29,791 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:32,729 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:36,358 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:42,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:38:42,551 INFO L93 Difference]: Finished difference Result 833 states and 1282 transitions. [2021-11-19 14:38:42,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:38:42,552 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-19 14:38:42,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:38:42,556 INFO L225 Difference]: With dead ends: 833 [2021-11-19 14:38:42,556 INFO L226 Difference]: Without dead ends: 536 [2021-11-19 14:38:42,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 216 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:38:42,558 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 333 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 72 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:38:42,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 880 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 613 Invalid, 1 Unknown, 0 Unchecked, 44.4s Time] [2021-11-19 14:38:42,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-11-19 14:38:42,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 348. [2021-11-19 14:38:42,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 1.5331412103746398) internal successors, (532), 347 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:38:42,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 532 transitions. [2021-11-19 14:38:42,578 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 532 transitions. Word has length 112 [2021-11-19 14:38:42,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:38:42,579 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 532 transitions. [2021-11-19 14:38:42,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:38:42,579 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 532 transitions. [2021-11-19 14:38:42,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 14:38:42,582 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:38:42,582 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:38:42,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:38:42,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:38:42,815 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:38:42,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:38:42,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1824908632, now seen corresponding path program 1 times [2021-11-19 14:38:42,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:38:42,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [853905653] [2021-11-19 14:38:42,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:38:42,817 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:38:42,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:38:42,818 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:38:42,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:38:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:38:43,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:38:43,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:38:43,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:43,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:43,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:43,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:43,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:38:43,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:38:43,671 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:38:43,671 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 [2021-11-19 14:38:43,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:38:43,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:38:43,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:38:44,116 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:38:44,117 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 [2021-11-19 14:38:46,050 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:38:46,050 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 [2021-11-19 14:38:46,187 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:38:46,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:38:46,675 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:38:46,676 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:38:46,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [853905653] [2021-11-19 14:38:46,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [853905653] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:38:46,676 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:38:46,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:38:46,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582656496] [2021-11-19 14:38:46,677 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:38:46,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:38:46,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:38:46,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:38:46,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:38:46,679 INFO L87 Difference]: Start difference. First operand 348 states and 532 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:38:48,711 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:51,321 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:38:56,234 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:06,343 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:10,368 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:12,375 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:13,853 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:16,980 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:19,320 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:22,139 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:23,523 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:24,594 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:26,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:39:26,522 INFO L93 Difference]: Finished difference Result 891 states and 1368 transitions. [2021-11-19 14:39:26,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:39:26,525 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-19 14:39:26,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:39:26,528 INFO L225 Difference]: With dead ends: 891 [2021-11-19 14:39:26,528 INFO L226 Difference]: Without dead ends: 564 [2021-11-19 14:39:26,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:39:26,529 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 257 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 72 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:39:26,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 770 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 510 Invalid, 2 Unknown, 0 Unchecked, 39.7s Time] [2021-11-19 14:39:26,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-11-19 14:39:26,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 379. [2021-11-19 14:39:26,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 1.529100529100529) internal successors, (578), 378 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:39:26,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 578 transitions. [2021-11-19 14:39:26,550 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 578 transitions. Word has length 113 [2021-11-19 14:39:26,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:39:26,551 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 578 transitions. [2021-11-19 14:39:26,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:39:26,552 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 578 transitions. [2021-11-19 14:39:26,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-19 14:39:26,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:39:26,554 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:39:26,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:39:26,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:39:26,765 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:39:26,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:39:26,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1795100272, now seen corresponding path program 1 times [2021-11-19 14:39:26,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:39:26,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1909408382] [2021-11-19 14:39:26,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:26,768 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:39:26,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:39:26,770 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:39:26,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:39:27,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:27,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:39:27,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:27,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:39:27,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:39:27,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:39:27,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:39:27,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:39:27,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:39:27,619 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:39:27,619 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 [2021-11-19 14:39:27,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:39:27,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:39:27,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:39:28,044 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:39:28,044 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 [2021-11-19 14:39:30,021 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:39:30,022 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 [2021-11-19 14:39:30,196 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:39:30,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:30,842 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:39:30,843 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:39:30,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1909408382] [2021-11-19 14:39:30,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1909408382] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:39:30,843 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:39:30,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:39:30,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837940418] [2021-11-19 14:39:30,844 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:39:30,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:39:30,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:39:30,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:39:30,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:39:30,845 INFO L87 Difference]: Start difference. First operand 379 states and 578 transitions. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:39:32,884 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:43,262 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:46,197 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:47,484 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:50,192 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:55,090 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:39:57,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:39:57,354 INFO L93 Difference]: Finished difference Result 973 states and 1492 transitions. [2021-11-19 14:39:57,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:39:57,356 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-11-19 14:39:57,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:39:57,359 INFO L225 Difference]: With dead ends: 973 [2021-11-19 14:39:57,359 INFO L226 Difference]: Without dead ends: 615 [2021-11-19 14:39:57,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:39:57,360 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 315 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 58 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:39:57,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 626 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 390 Invalid, 3 Unknown, 0 Unchecked, 26.4s Time] [2021-11-19 14:39:57,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-11-19 14:39:57,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 444. [2021-11-19 14:39:57,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 1.5259593679458239) internal successors, (676), 443 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:39:57,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 676 transitions. [2021-11-19 14:39:57,398 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 676 transitions. Word has length 114 [2021-11-19 14:39:57,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:39:57,398 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 676 transitions. [2021-11-19 14:39:57,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:39:57,399 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 676 transitions. [2021-11-19 14:39:57,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 14:39:57,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:39:57,401 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:39:57,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:39:57,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:39:57,622 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:39:57,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:39:57,623 INFO L85 PathProgramCache]: Analyzing trace with hash -688905657, now seen corresponding path program 1 times [2021-11-19 14:39:57,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:39:57,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [626320291] [2021-11-19 14:39:57,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:39:57,625 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:39:57,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:39:57,625 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:39:57,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 14:39:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:39:57,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:39:57,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:39:58,267 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:39:58,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:39:58,626 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:39:58,626 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:39:58,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [626320291] [2021-11-19 14:39:58,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [626320291] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:39:58,627 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:39:58,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:39:58,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71758015] [2021-11-19 14:39:58,627 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:39:58,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:39:58,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:39:58,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:39:58,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:39:58,629 INFO L87 Difference]: Start difference. First operand 444 states and 676 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:39:59,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:39:59,712 INFO L93 Difference]: Finished difference Result 1673 states and 2574 transitions. [2021-11-19 14:39:59,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:39:59,713 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-11-19 14:39:59,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:39:59,725 INFO L225 Difference]: With dead ends: 1673 [2021-11-19 14:39:59,725 INFO L226 Difference]: Without dead ends: 1250 [2021-11-19 14:39:59,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:39:59,728 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 436 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:39:59,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 607 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:39:59,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-11-19 14:39:59,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1241. [2021-11-19 14:39:59,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1240 states have (on average 1.5233870967741936) internal successors, (1889), 1240 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:39:59,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 1889 transitions. [2021-11-19 14:39:59,800 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 1889 transitions. Word has length 120 [2021-11-19 14:39:59,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:39:59,801 INFO L470 AbstractCegarLoop]: Abstraction has 1241 states and 1889 transitions. [2021-11-19 14:39:59,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:39:59,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 1889 transitions. [2021-11-19 14:39:59,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 14:39:59,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:39:59,806 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:39:59,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:00,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:00,025 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:00,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:00,026 INFO L85 PathProgramCache]: Analyzing trace with hash -440759163, now seen corresponding path program 1 times [2021-11-19 14:40:00,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:00,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521653956] [2021-11-19 14:40:00,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:00,028 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:00,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:00,030 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:00,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:40:00,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:00,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:40:00,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:00,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:00,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:00,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:00,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:00,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:00,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:40:01,037 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:40:01,038 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 [2021-11-19 14:40:01,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:40:01,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:40:01,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:40:01,581 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:40:01,581 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 [2021-11-19 14:40:03,977 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:40:03,978 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 [2021-11-19 14:40:04,116 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:40:04,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:04,656 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:40:04,656 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:04,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521653956] [2021-11-19 14:40:04,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521653956] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:40:04,657 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:40:04,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:40:04,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991168739] [2021-11-19 14:40:04,657 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:04,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:40:04,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:04,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:40:04,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:40:04,659 INFO L87 Difference]: Start difference. First operand 1241 states and 1889 transitions. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:40:06,687 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:12,136 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:20,253 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:22,137 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:26,192 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:30,127 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:33,514 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:35,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:40:35,035 INFO L93 Difference]: Finished difference Result 3081 states and 4661 transitions. [2021-11-19 14:40:35,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:40:35,037 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-11-19 14:40:35,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:40:35,050 INFO L225 Difference]: With dead ends: 3081 [2021-11-19 14:40:35,050 INFO L226 Difference]: Without dead ends: 1861 [2021-11-19 14:40:35,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:40:35,053 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 328 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 77 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:40:35,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 570 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 405 Invalid, 1 Unknown, 0 Unchecked, 30.2s Time] [2021-11-19 14:40:35,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-11-19 14:40:35,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1352. [2021-11-19 14:40:35,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 1.5225758697261287) internal successors, (2057), 1351 states have internal predecessors, (2057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:40:35,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 2057 transitions. [2021-11-19 14:40:35,129 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 2057 transitions. Word has length 120 [2021-11-19 14:40:35,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:40:35,130 INFO L470 AbstractCegarLoop]: Abstraction has 1352 states and 2057 transitions. [2021-11-19 14:40:35,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:40:35,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 2057 transitions. [2021-11-19 14:40:35,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-19 14:40:35,134 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:40:35,135 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:40:35,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:40:35,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:40:35,349 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:40:35,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:40:35,350 INFO L85 PathProgramCache]: Analyzing trace with hash -404149718, now seen corresponding path program 1 times [2021-11-19 14:40:35,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:40:35,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [608228353] [2021-11-19 14:40:35,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:40:35,352 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:40:35,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:40:35,353 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:40:35,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 14:40:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:40:36,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:40:36,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:40:36,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:36,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:36,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:36,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:36,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:40:36,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:40:36,197 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:40:36,197 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 [2021-11-19 14:40:36,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:40:36,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:40:36,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:40:36,642 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:40:36,642 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 [2021-11-19 14:40:39,123 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:40:39,123 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 [2021-11-19 14:40:39,263 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:40:39,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:40:39,804 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:40:39,805 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:40:39,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [608228353] [2021-11-19 14:40:39,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [608228353] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:40:39,805 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:40:39,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:40:39,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241513958] [2021-11-19 14:40:39,806 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:40:39,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:40:39,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:40:39,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:40:39,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:40:39,807 INFO L87 Difference]: Start difference. First operand 1352 states and 2057 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:40:41,831 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:49,622 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:54,066 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:40:59,755 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:41:04,212 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:41:06,242 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:41:07,565 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:41:10,528 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:41:17,544 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:41:20,020 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:41:21,581 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:41:22,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:41:22,209 INFO L93 Difference]: Finished difference Result 3202 states and 4844 transitions. [2021-11-19 14:41:22,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:41:22,211 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-19 14:41:22,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:41:22,221 INFO L225 Difference]: With dead ends: 3202 [2021-11-19 14:41:22,222 INFO L226 Difference]: Without dead ends: 1871 [2021-11-19 14:41:22,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 234 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:41:22,226 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 298 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 75 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:41:22,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 845 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 608 Invalid, 4 Unknown, 0 Unchecked, 42.2s Time] [2021-11-19 14:41:22,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2021-11-19 14:41:22,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1373. [2021-11-19 14:41:22,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1373 states, 1372 states have (on average 1.5233236151603498) internal successors, (2090), 1372 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:41:22,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1373 states to 1373 states and 2090 transitions. [2021-11-19 14:41:22,330 INFO L78 Accepts]: Start accepts. Automaton has 1373 states and 2090 transitions. Word has length 121 [2021-11-19 14:41:22,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:41:22,330 INFO L470 AbstractCegarLoop]: Abstraction has 1373 states and 2090 transitions. [2021-11-19 14:41:22,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:41:22,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1373 states and 2090 transitions. [2021-11-19 14:41:22,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-19 14:41:22,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:41:22,338 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:41:22,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 14:41:22,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:41:22,560 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:41:22,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:41:22,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1206993117, now seen corresponding path program 1 times [2021-11-19 14:41:22,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:41:22,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277401334] [2021-11-19 14:41:22,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:22,562 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:41:22,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:41:22,563 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:41:22,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 14:41:22,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:22,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:41:22,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:41:23,225 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:41:23,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:41:23,610 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:41:23,610 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:41:23,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277401334] [2021-11-19 14:41:23,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277401334] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:41:23,611 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:41:23,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:41:23,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033283658] [2021-11-19 14:41:23,611 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:41:23,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:41:23,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:41:23,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:41:23,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:41:23,612 INFO L87 Difference]: Start difference. First operand 1373 states and 2090 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:41:24,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:41:24,737 INFO L93 Difference]: Finished difference Result 2752 states and 4193 transitions. [2021-11-19 14:41:24,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:41:24,739 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-11-19 14:41:24,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:41:24,747 INFO L225 Difference]: With dead ends: 2752 [2021-11-19 14:41:24,747 INFO L226 Difference]: Without dead ends: 1400 [2021-11-19 14:41:24,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:41:24,750 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 15 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:41:24,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 430 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:41:24,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-11-19 14:41:24,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1400. [2021-11-19 14:41:24,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1399 states have (on average 1.5189421015010722) internal successors, (2125), 1399 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:41:24,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 2125 transitions. [2021-11-19 14:41:24,831 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 2125 transitions. Word has length 128 [2021-11-19 14:41:24,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:41:24,832 INFO L470 AbstractCegarLoop]: Abstraction has 1400 states and 2125 transitions. [2021-11-19 14:41:24,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:41:24,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 2125 transitions. [2021-11-19 14:41:24,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-19 14:41:24,836 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:41:24,836 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:41:24,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 14:41:25,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:41:25,055 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:41:25,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:41:25,055 INFO L85 PathProgramCache]: Analyzing trace with hash 946113701, now seen corresponding path program 1 times [2021-11-19 14:41:25,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:41:25,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2021686170] [2021-11-19 14:41:25,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:25,057 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:41:25,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:41:25,059 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:41:25,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 14:41:25,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:25,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:41:25,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:41:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-19 14:41:25,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:41:26,157 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-19 14:41:26,158 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:41:26,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2021686170] [2021-11-19 14:41:26,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2021686170] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:41:26,158 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:41:26,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-19 14:41:26,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634365430] [2021-11-19 14:41:26,159 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:41:26,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:41:26,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:41:26,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:41:26,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:41:26,160 INFO L87 Difference]: Start difference. First operand 1400 states and 2125 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:41:26,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:41:26,334 INFO L93 Difference]: Finished difference Result 2781 states and 4229 transitions. [2021-11-19 14:41:26,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:41:26,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-11-19 14:41:26,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:41:26,344 INFO L225 Difference]: With dead ends: 2781 [2021-11-19 14:41:26,344 INFO L226 Difference]: Without dead ends: 1402 [2021-11-19 14:41:26,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:41:26,347 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 4 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:41:26,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 409 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:41:26,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2021-11-19 14:41:26,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 1402. [2021-11-19 14:41:26,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 1401 states have (on average 1.5182012847965738) internal successors, (2127), 1401 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:41:26,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 2127 transitions. [2021-11-19 14:41:26,419 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 2127 transitions. Word has length 128 [2021-11-19 14:41:26,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:41:26,420 INFO L470 AbstractCegarLoop]: Abstraction has 1402 states and 2127 transitions. [2021-11-19 14:41:26,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:41:26,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 2127 transitions. [2021-11-19 14:41:26,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 14:41:26,424 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:41:26,424 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:41:26,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 14:41:26,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:41:26,644 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:41:26,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:41:26,645 INFO L85 PathProgramCache]: Analyzing trace with hash 2135350117, now seen corresponding path program 1 times [2021-11-19 14:41:26,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:41:26,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [31204272] [2021-11-19 14:41:26,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:41:26,646 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:41:26,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:41:26,648 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:41:26,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 14:41:27,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:41:27,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:41:27,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:41:27,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:41:27,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:41:27,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:41:27,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:41:27,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:41:27,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:41:27,635 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:41:27,635 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 [2021-11-19 14:41:27,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:41:27,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:41:27,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:41:28,095 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:41:28,095 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 [2021-11-19 14:41:30,824 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:41:30,824 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 [2021-11-19 14:41:30,985 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:41:30,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:41:32,367 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:41:32,368 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:41:32,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [31204272] [2021-11-19 14:41:32,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [31204272] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:41:32,368 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:41:32,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-19 14:41:32,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236053438] [2021-11-19 14:41:32,368 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:41:32,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:41:32,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:41:32,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:41:32,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:41:32,369 INFO L87 Difference]: Start difference. First operand 1402 states and 2127 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:41:34,399 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:41:36,412 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:41:49,111 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:41:50,179 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:41:53,543 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:41:55,560 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:41:58,558 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:42:00,224 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:42:00,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:42:00,402 INFO L93 Difference]: Finished difference Result 3007 states and 4556 transitions. [2021-11-19 14:42:00,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:42:00,404 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 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 131 [2021-11-19 14:42:00,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:42:00,415 INFO L225 Difference]: With dead ends: 3007 [2021-11-19 14:42:00,416 INFO L226 Difference]: Without dead ends: 1628 [2021-11-19 14:42:00,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 254 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:42:00,418 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 57 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 6 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:42:00,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 688 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 325 Invalid, 3 Unknown, 0 Unchecked, 27.9s Time] [2021-11-19 14:42:00,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2021-11-19 14:42:00,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 1529. [2021-11-19 14:42:00,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 1.5143979057591623) internal successors, (2314), 1528 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:42:00,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 2314 transitions. [2021-11-19 14:42:00,512 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 2314 transitions. Word has length 131 [2021-11-19 14:42:00,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:42:00,512 INFO L470 AbstractCegarLoop]: Abstraction has 1529 states and 2314 transitions. [2021-11-19 14:42:00,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:42:00,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 2314 transitions. [2021-11-19 14:42:00,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 14:42:00,517 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:42:00,517 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:42:00,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 14:42:00,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:42:00,733 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:42:00,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:42:00,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1140656419, now seen corresponding path program 1 times [2021-11-19 14:42:00,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:42:00,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20192744] [2021-11-19 14:42:00,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:42:00,735 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:42:00,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:42:00,737 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:42:00,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 14:42:01,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:42:01,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:42:01,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:42:01,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:42:01,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:42:01,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:42:01,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:42:01,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:42:01,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:42:01,762 INFO L354 Elim1Store]: treesize reduction 190, result has 12.8 percent of original size [2021-11-19 14:42:01,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 38 [2021-11-19 14:42:01,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:42:01,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:42:01,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:42:02,218 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:42:02,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 70 treesize of output 87 [2021-11-19 14:42:03,670 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:42:03,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 108 treesize of output 36 [2021-11-19 14:42:03,873 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 14:42:03,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:42:04,763 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 14:42:04,763 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:42:04,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20192744] [2021-11-19 14:42:04,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20192744] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:42:04,764 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:42:04,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2021-11-19 14:42:04,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763350421] [2021-11-19 14:42:04,764 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:42:04,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:42:04,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:42:04,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:42:04,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:42:04,766 INFO L87 Difference]: Start difference. First operand 1529 states and 2314 transitions. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 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) [2021-11-19 14:42:06,792 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:42:12,724 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:42:15,784 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:42:16,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:42:16,522 INFO L93 Difference]: Finished difference Result 3146 states and 4758 transitions. [2021-11-19 14:42:16,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:42:16,524 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 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 131 [2021-11-19 14:42:16,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:42:16,532 INFO L225 Difference]: With dead ends: 3146 [2021-11-19 14:42:16,532 INFO L226 Difference]: Without dead ends: 1640 [2021-11-19 14:42:16,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 254 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:42:16,534 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 54 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:42:16,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 639 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 161 Invalid, 1 Unknown, 0 Unchecked, 11.6s Time] [2021-11-19 14:42:16,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2021-11-19 14:42:16,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1601. [2021-11-19 14:42:16,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 1600 states have (on average 1.51) internal successors, (2416), 1600 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:42:16,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 2416 transitions. [2021-11-19 14:42:16,638 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 2416 transitions. Word has length 131 [2021-11-19 14:42:16,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:42:16,638 INFO L470 AbstractCegarLoop]: Abstraction has 1601 states and 2416 transitions. [2021-11-19 14:42:16,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 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) [2021-11-19 14:42:16,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 2416 transitions. [2021-11-19 14:42:16,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 14:42:16,643 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:42:16,644 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:42:16,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-19 14:42:16,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:42:16,863 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:42:16,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:42:16,863 INFO L85 PathProgramCache]: Analyzing trace with hash 99566424, now seen corresponding path program 1 times [2021-11-19 14:42:16,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:42:16,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [726625854] [2021-11-19 14:42:16,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:42:16,865 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:42:16,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:42:16,866 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:42:16,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 14:42:17,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:42:17,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:42:17,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:42:17,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:42:17,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:42:17,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:42:17,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:42:17,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:42:17,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:42:17,715 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:42:17,715 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 [2021-11-19 14:42:17,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:42:17,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:42:17,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:42:18,160 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:42:18,161 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 [2021-11-19 14:42:20,013 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:42:20,013 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 [2021-11-19 14:42:20,224 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 14:42:20,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:42:20,785 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 14:42:20,785 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:42:20,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [726625854] [2021-11-19 14:42:20,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [726625854] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:42:20,785 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:42:20,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:42:20,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925280714] [2021-11-19 14:42:20,786 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:42:20,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:42:20,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:42:20,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:42:20,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:42:20,787 INFO L87 Difference]: Start difference. First operand 1601 states and 2416 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) [2021-11-19 14:42:22,815 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:42:24,825 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:42:40,106 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:42:42,718 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:42:44,030 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:42:46,215 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:42:49,370 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:42:52,341 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:42:56,223 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:42:59,468 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:42:59,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:42:59,704 INFO L93 Difference]: Finished difference Result 3639 states and 5463 transitions. [2021-11-19 14:42:59,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:42:59,705 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 137 [2021-11-19 14:42:59,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:42:59,716 INFO L225 Difference]: With dead ends: 3639 [2021-11-19 14:42:59,716 INFO L226 Difference]: Without dead ends: 2061 [2021-11-19 14:42:59,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 266 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:42:59,718 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 306 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 73 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:42:59,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 800 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 527 Invalid, 5 Unknown, 0 Unchecked, 38.7s Time] [2021-11-19 14:42:59,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2021-11-19 14:42:59,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1685. [2021-11-19 14:42:59,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1685 states, 1684 states have (on average 1.497624703087886) internal successors, (2522), 1684 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:42:59,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1685 states to 1685 states and 2522 transitions. [2021-11-19 14:42:59,813 INFO L78 Accepts]: Start accepts. Automaton has 1685 states and 2522 transitions. Word has length 137 [2021-11-19 14:42:59,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:42:59,814 INFO L470 AbstractCegarLoop]: Abstraction has 1685 states and 2522 transitions. [2021-11-19 14:42:59,814 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) [2021-11-19 14:42:59,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1685 states and 2522 transitions. [2021-11-19 14:42:59,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-19 14:42:59,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:42:59,819 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 14:42:59,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-19 14:43:00,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:43:00,033 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:43:00,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:43:00,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1530010546, now seen corresponding path program 1 times [2021-11-19 14:43:00,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:43:00,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834059551] [2021-11-19 14:43:00,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:43:00,035 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:43:00,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:43:00,036 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:43:00,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-19 14:43:00,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:43:00,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:43:00,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:43:00,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:43:00,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:43:00,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:43:00,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:43:00,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:43:00,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:43:00,958 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:43:00,959 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 [2021-11-19 14:43:01,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:43:01,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:43:01,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:43:01,416 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:43:01,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-19 14:43:03,120 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:43:03,120 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 [2021-11-19 14:43:03,312 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 14:43:03,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:43:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 14:43:03,835 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:43:03,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834059551] [2021-11-19 14:43:03,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1834059551] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:43:03,835 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:43:03,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:43:03,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674709243] [2021-11-19 14:43:03,835 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:43:03,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:43:03,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:43:03,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:43:03,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:43:03,836 INFO L87 Difference]: Start difference. First operand 1685 states and 2522 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) [2021-11-19 14:43:05,860 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:43:16,641 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:43:24,111 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:43:25,421 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:43:28,719 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:43:29,897 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:43:32,026 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:43:36,329 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:43:38,312 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:43:39,602 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:43:40,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:43:40,407 INFO L93 Difference]: Finished difference Result 3669 states and 5462 transitions. [2021-11-19 14:43:40,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:43:40,408 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 138 [2021-11-19 14:43:40,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:43:40,420 INFO L225 Difference]: With dead ends: 3669 [2021-11-19 14:43:40,420 INFO L226 Difference]: Without dead ends: 2007 [2021-11-19 14:43:40,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 268 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:43:40,422 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 224 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 70 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:43:40,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 862 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 614 Invalid, 2 Unknown, 0 Unchecked, 36.4s Time] [2021-11-19 14:43:40,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2007 states. [2021-11-19 14:43:40,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2007 to 1685. [2021-11-19 14:43:40,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1685 states, 1684 states have (on average 1.4857482185273159) internal successors, (2502), 1684 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:43:40,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1685 states to 1685 states and 2502 transitions. [2021-11-19 14:43:40,501 INFO L78 Accepts]: Start accepts. Automaton has 1685 states and 2502 transitions. Word has length 138 [2021-11-19 14:43:40,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:43:40,502 INFO L470 AbstractCegarLoop]: Abstraction has 1685 states and 2502 transitions. [2021-11-19 14:43:40,502 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) [2021-11-19 14:43:40,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1685 states and 2502 transitions. [2021-11-19 14:43:40,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-19 14:43:40,518 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:43:40,519 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:43:40,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-19 14:43:40,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:43:40,733 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:43:40,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:43:40,734 INFO L85 PathProgramCache]: Analyzing trace with hash -258050517, now seen corresponding path program 1 times [2021-11-19 14:43:40,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:43:40,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409839641] [2021-11-19 14:43:40,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:43:40,735 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:43:40,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:43:40,736 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:43:40,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-19 14:43:41,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:43:41,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:43:41,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:43:41,469 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:43:41,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:43:41,909 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:43:41,909 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:43:41,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409839641] [2021-11-19 14:43:41,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409839641] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:43:41,910 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:43:41,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 14:43:41,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670423499] [2021-11-19 14:43:41,911 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:43:41,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:43:41,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:43:41,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:43:41,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:43:41,912 INFO L87 Difference]: Start difference. First operand 1685 states and 2502 transitions. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:43:42,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:43:42,877 INFO L93 Difference]: Finished difference Result 4427 states and 6598 transitions. [2021-11-19 14:43:42,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:43:42,878 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 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 152 [2021-11-19 14:43:42,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:43:42,891 INFO L225 Difference]: With dead ends: 4427 [2021-11-19 14:43:42,891 INFO L226 Difference]: Without dead ends: 2765 [2021-11-19 14:43:42,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:43:42,894 INFO L933 BasicCegarLoop]: 360 mSDtfsCounter, 316 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:43:42,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 716 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:43:42,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2765 states. [2021-11-19 14:43:42,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2765 to 2751. [2021-11-19 14:43:42,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2751 states, 2750 states have (on average 1.485090909090909) internal successors, (4084), 2750 states have internal predecessors, (4084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:43:43,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2751 states to 2751 states and 4084 transitions. [2021-11-19 14:43:43,005 INFO L78 Accepts]: Start accepts. Automaton has 2751 states and 4084 transitions. Word has length 152 [2021-11-19 14:43:43,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:43:43,006 INFO L470 AbstractCegarLoop]: Abstraction has 2751 states and 4084 transitions. [2021-11-19 14:43:43,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:43:43,007 INFO L276 IsEmpty]: Start isEmpty. Operand 2751 states and 4084 transitions. [2021-11-19 14:43:43,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-19 14:43:43,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:43:43,021 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:43:43,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-19 14:43:43,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:43:43,233 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:43:43,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:43:43,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1147067013, now seen corresponding path program 1 times [2021-11-19 14:43:43,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:43:43,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [21317356] [2021-11-19 14:43:43,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:43:43,235 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:43:43,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:43:43,241 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:43:43,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-19 14:43:44,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:43:44,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:43:44,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:43:44,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:43:44,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:43:44,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:43:44,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:43:44,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:43:44,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:43:44,338 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:43:44,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-19 14:43:44,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:43:44,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:43:44,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:43:44,902 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:43:44,902 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 [2021-11-19 14:43:46,265 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:43:46,266 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 [2021-11-19 14:43:46,518 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 14:43:46,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:43:47,137 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 14:43:47,137 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:43:47,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [21317356] [2021-11-19 14:43:47,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [21317356] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:43:47,138 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:43:47,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:43:47,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116937197] [2021-11-19 14:43:47,138 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:43:47,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:43:47,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:43:47,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:43:47,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:43:47,140 INFO L87 Difference]: Start difference. First operand 2751 states and 4084 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:43:49,183 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:01,142 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:03,299 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:04,501 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:07,390 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:12,343 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:14,645 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:15,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:44:15,213 INFO L93 Difference]: Finished difference Result 5992 states and 8844 transitions. [2021-11-19 14:44:15,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:44:15,214 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2021-11-19 14:44:15,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:44:15,236 INFO L225 Difference]: With dead ends: 5992 [2021-11-19 14:44:15,237 INFO L226 Difference]: Without dead ends: 3264 [2021-11-19 14:44:15,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:44:15,240 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 332 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 73 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:44:15,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 570 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 400 Invalid, 1 Unknown, 0 Unchecked, 27.8s Time] [2021-11-19 14:44:15,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3264 states. [2021-11-19 14:44:15,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3264 to 2751. [2021-11-19 14:44:15,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2751 states, 2750 states have (on average 1.469090909090909) internal successors, (4040), 2750 states have internal predecessors, (4040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:44:15,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2751 states to 2751 states and 4040 transitions. [2021-11-19 14:44:15,369 INFO L78 Accepts]: Start accepts. Automaton has 2751 states and 4040 transitions. Word has length 153 [2021-11-19 14:44:15,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:44:15,369 INFO L470 AbstractCegarLoop]: Abstraction has 2751 states and 4040 transitions. [2021-11-19 14:44:15,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:44:15,370 INFO L276 IsEmpty]: Start isEmpty. Operand 2751 states and 4040 transitions. [2021-11-19 14:44:15,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-19 14:44:15,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:44:15,373 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:44:15,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-19 14:44:15,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:44:15,573 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:44:15,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:44:15,574 INFO L85 PathProgramCache]: Analyzing trace with hash 63181408, now seen corresponding path program 1 times [2021-11-19 14:44:15,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:44:15,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1237285096] [2021-11-19 14:44:15,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:44:15,575 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:44:15,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:44:15,576 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:44:15,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-19 14:44:16,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:44:16,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:44:16,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:44:16,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:44:16,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:44:16,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:44:16,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:44:16,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:44:16,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:44:16,447 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 14:44:16,448 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 [2021-11-19 14:44:16,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:44:16,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:44:16,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:44:16,855 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 14:44:16,855 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 [2021-11-19 14:44:19,042 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:44:19,043 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 [2021-11-19 14:44:19,276 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 14:44:19,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:44:19,867 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 14:44:19,867 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:44:19,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1237285096] [2021-11-19 14:44:19,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1237285096] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:44:19,867 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:44:19,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 14:44:19,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989412599] [2021-11-19 14:44:19,868 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:44:19,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:44:19,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:44:19,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:44:19,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:44:19,869 INFO L87 Difference]: Start difference. First operand 2751 states and 4040 transitions. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:44:21,890 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:22,935 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:31,438 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:35,968 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:37,180 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:38,849 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:41,586 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:44,174 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:45,969 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:47,314 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:51,728 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:53,742 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:54,954 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 14:44:55,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:44:55,734 INFO L93 Difference]: Finished difference Result 6192 states and 9041 transitions. [2021-11-19 14:44:55,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:44:55,736 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2021-11-19 14:44:55,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:44:55,746 INFO L225 Difference]: With dead ends: 6192 [2021-11-19 14:44:55,746 INFO L226 Difference]: Without dead ends: 3464 [2021-11-19 14:44:55,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:44:55,750 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 291 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 73 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:44:55,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 728 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 522 Invalid, 2 Unknown, 0 Unchecked, 35.6s Time] [2021-11-19 14:44:55,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3464 states. [2021-11-19 14:44:55,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3464 to 2926. [2021-11-19 14:44:55,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2926 states, 2925 states have (on average 1.4598290598290597) internal successors, (4270), 2925 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:44:55,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2926 states to 2926 states and 4270 transitions. [2021-11-19 14:44:55,916 INFO L78 Accepts]: Start accepts. Automaton has 2926 states and 4270 transitions. Word has length 153 [2021-11-19 14:44:55,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:44:55,917 INFO L470 AbstractCegarLoop]: Abstraction has 2926 states and 4270 transitions. [2021-11-19 14:44:55,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 14:44:55,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2926 states and 4270 transitions. [2021-11-19 14:44:55,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-19 14:44:55,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:44:55,920 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:44:55,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-19 14:44:56,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:44:56,126 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:44:56,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:44:56,126 INFO L85 PathProgramCache]: Analyzing trace with hash -984283709, now seen corresponding path program 1 times [2021-11-19 14:44:56,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:44:56,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [993317134] [2021-11-19 14:44:56,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:44:56,127 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:44:56,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:44:56,128 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:44:56,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c595cf91-4fcf-45f8-9136-1edab72bfe5e/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-19 14:44:57,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:44:57,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:44:57,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:44:57,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:44:57,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:44:57,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:44:57,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:44:57,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:44:57,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:44:57,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:44:57,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:44:57,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:44:57,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:44:57,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:44:57,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:44:57,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 14:44:57,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:44:57,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:44:57,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:44:57,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:44:57,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 14:44:57,733 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 14:44:57,733 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 [2021-11-19 14:44:59,300 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 14:44:59,300 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 [2021-11-19 14:44:59,519 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-19 14:44:59,519 INFO L328 TraceCheckSpWp]: Computing backward predicates...