./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7b66a12741a993de3de45354c2fb746af1f1a44b9ceb94bb607376650a8088af --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:17:45,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:17:45,352 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:17:45,416 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:17:45,418 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:17:45,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:17:45,426 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:17:45,432 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:17:45,435 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:17:45,445 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:17:45,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:17:45,449 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:17:45,449 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:17:45,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:17:45,455 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:17:45,462 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:17:45,464 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:17:45,465 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:17:45,468 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:17:45,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:17:45,480 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:17:45,482 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:17:45,485 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:17:45,487 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:17:45,491 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:17:45,492 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:17:45,492 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:17:45,494 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:17:45,495 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:17:45,497 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:17:45,498 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:17:45,499 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:17:45,501 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:17:45,502 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:17:45,504 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:17:45,505 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:17:45,505 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:17:45,506 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:17:45,506 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:17:45,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:17:45,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:17:45,509 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:17:45,558 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:17:45,559 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:17:45,561 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:17:45,561 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:17:45,562 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:17:45,562 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:17:45,562 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:17:45,562 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:17:45,570 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:17:45,571 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:17:45,572 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:17:45,572 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:17:45,572 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:17:45,573 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:17:45,573 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:17:45,574 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:17:45,574 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:17:45,574 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:17:45,575 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:17:45,575 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:17:45,575 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:17:45,576 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:17:45,576 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:17:45,576 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:17:45,576 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:17:45,577 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:17:45,577 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:17:45,577 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:17:45,578 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:17:45,578 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:17:45,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:17:45,578 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:17:45,579 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:17:45,579 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:17:45,579 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:17:45,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:17:45,580 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:17:45,580 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:17:45,581 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:17:45,581 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_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7b66a12741a993de3de45354c2fb746af1f1a44b9ceb94bb607376650a8088af [2021-11-03 05:17:45,935 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:17:45,972 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:17:45,975 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:17:45,977 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:17:45,979 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:17:45,980 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c [2021-11-03 05:17:46,064 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/data/bf09a06f3/cb65b81f17f94f67a4f0215703135323/FLAG17627b6c5 [2021-11-03 05:17:46,730 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:17:46,731 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c [2021-11-03 05:17:46,766 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/data/bf09a06f3/cb65b81f17f94f67a4f0215703135323/FLAG17627b6c5 [2021-11-03 05:17:46,958 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/data/bf09a06f3/cb65b81f17f94f67a4f0215703135323 [2021-11-03 05:17:46,960 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:17:46,964 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:17:46,966 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:17:46,966 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:17:46,971 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:17:46,972 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:17:46" (1/1) ... [2021-11-03 05:17:46,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d685293 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:46, skipping insertion in model container [2021-11-03 05:17:46,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:17:46" (1/1) ... [2021-11-03 05:17:46,986 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:17:47,088 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:17:47,669 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c[74369,74382] [2021-11-03 05:17:47,696 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:17:47,723 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-03 05:17:47,724 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@d23c3c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:47, skipping insertion in model container [2021-11-03 05:17:47,724 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:17:47,725 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 05:17:47,729 INFO L168 Benchmark]: Toolchain (without parser) took 761.55 ms. Allocated memory is still 117.4 MB. Free memory was 80.9 MB in the beginning and 83.0 MB in the end (delta: -2.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-03 05:17:47,731 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 75.5 MB. Free memory was 49.7 MB in the beginning and 49.7 MB in the end (delta: 27.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:17:47,732 INFO L168 Benchmark]: CACSL2BoogieTranslator took 758.50 ms. Allocated memory is still 117.4 MB. Free memory was 80.7 MB in the beginning and 83.0 MB in the end (delta: -2.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-03 05:17:47,735 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 75.5 MB. Free memory was 49.7 MB in the beginning and 49.7 MB in the end (delta: 27.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 758.50 ms. Allocated memory is still 117.4 MB. Free memory was 80.7 MB in the beginning and 83.0 MB in the end (delta: -2.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1050]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7b66a12741a993de3de45354c2fb746af1f1a44b9ceb94bb607376650a8088af --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:17:50,465 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:17:50,468 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:17:50,507 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:17:50,508 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:17:50,509 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:17:50,512 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:17:50,515 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:17:50,518 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:17:50,520 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:17:50,521 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:17:50,523 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:17:50,525 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:17:50,532 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:17:50,533 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:17:50,535 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:17:50,536 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:17:50,538 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:17:50,541 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:17:50,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:17:50,547 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:17:50,548 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:17:50,550 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:17:50,551 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:17:50,557 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:17:50,557 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:17:50,558 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:17:50,559 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:17:50,559 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:17:50,561 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:17:50,561 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:17:50,562 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:17:50,564 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:17:50,565 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:17:50,566 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:17:50,566 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:17:50,568 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:17:50,587 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:17:50,588 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:17:50,589 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:17:50,590 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:17:50,593 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 05:17:50,644 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:17:50,647 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:17:50,649 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:17:50,650 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:17:50,650 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:17:50,650 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:17:50,651 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:17:50,651 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:17:50,651 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:17:50,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:17:50,655 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:17:50,655 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:17:50,655 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:17:50,656 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:17:50,656 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:17:50,656 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:17:50,656 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:17:50,657 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 05:17:50,657 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 05:17:50,657 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:17:50,658 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:17:50,658 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:17:50,658 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:17:50,659 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:17:50,659 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 05:17:50,659 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:17:50,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:17:50,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:17:50,660 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:17:50,661 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:17:50,661 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 05:17:50,661 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 05:17:50,661 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:17:50,662 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:17:50,662 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:17:50,663 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_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7b66a12741a993de3de45354c2fb746af1f1a44b9ceb94bb607376650a8088af [2021-11-03 05:17:51,115 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:17:51,154 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:17:51,157 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:17:51,158 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:17:51,159 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:17:51,160 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c [2021-11-03 05:17:51,260 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/data/3e72d58fd/4e9c660d6c724d23aed5c7989489adb9/FLAG3a1e32196 [2021-11-03 05:17:52,083 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:17:52,083 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c [2021-11-03 05:17:52,111 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/data/3e72d58fd/4e9c660d6c724d23aed5c7989489adb9/FLAG3a1e32196 [2021-11-03 05:17:52,126 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/data/3e72d58fd/4e9c660d6c724d23aed5c7989489adb9 [2021-11-03 05:17:52,129 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:17:52,131 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:17:52,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:17:52,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:17:52,137 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:17:52,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:17:52" (1/1) ... [2021-11-03 05:17:52,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ee5accf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:52, skipping insertion in model container [2021-11-03 05:17:52,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:17:52" (1/1) ... [2021-11-03 05:17:52,149 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:17:52,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:17:52,783 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c[74369,74382] [2021-11-03 05:17:52,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:17:52,839 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 05:17:52,870 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:17:53,053 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c[74369,74382] [2021-11-03 05:17:53,057 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:17:53,074 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:17:53,213 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c[74369,74382] [2021-11-03 05:17:53,216 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:17:53,238 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:17:53,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:53 WrapperNode [2021-11-03 05:17:53,239 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:17:53,240 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:17:53,241 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:17:53,241 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:17:53,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:53" (1/1) ... [2021-11-03 05:17:53,284 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:53" (1/1) ... [2021-11-03 05:17:53,374 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:17:53,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:17:53,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:17:53,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:17:53,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:53" (1/1) ... [2021-11-03 05:17:53,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:53" (1/1) ... [2021-11-03 05:17:53,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:53" (1/1) ... [2021-11-03 05:17:53,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:53" (1/1) ... [2021-11-03 05:17:53,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:53" (1/1) ... [2021-11-03 05:17:53,527 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:53" (1/1) ... [2021-11-03 05:17:53,531 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:53" (1/1) ... [2021-11-03 05:17:53,538 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:17:53,539 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:17:53,539 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:17:53,539 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:17:53,540 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:53" (1/1) ... [2021-11-03 05:17:53,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:17:53,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:17:53,581 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:17:53,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:17:53,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 05:17:53,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 05:17:53,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:17:53,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 05:17:53,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 05:17:53,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 05:17:53,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:17:53,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:17:53,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 05:17:53,898 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-03 05:18:03,712 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-03 05:18:03,712 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-03 05:18:03,721 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:18:03,721 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-03 05:18:03,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:18:03 BoogieIcfgContainer [2021-11-03 05:18:03,724 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:18:03,725 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:18:03,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:18:03,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:18:03,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:17:52" (1/3) ... [2021-11-03 05:18:03,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@790dddc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:18:03, skipping insertion in model container [2021-11-03 05:18:03,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:53" (2/3) ... [2021-11-03 05:18:03,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@790dddc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:18:03, skipping insertion in model container [2021-11-03 05:18:03,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:18:03" (3/3) ... [2021-11-03 05:18:03,732 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.09.i.cil-1.c [2021-11-03 05:18:03,738 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:18:03,738 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 05:18:03,799 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:18:03,810 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 05:18:03,810 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 05:18:03,842 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:03,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-03 05:18:03,856 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:03,857 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:18:03,858 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:18:03,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:03,864 INFO L85 PathProgramCache]: Analyzing trace with hash -442385418, now seen corresponding path program 1 times [2021-11-03 05:18:03,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:03,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1039746613] [2021-11-03 05:18:03,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:03,882 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:03,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:03,889 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:03,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 05:18:04,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:04,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:18:04,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:04,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:18:04,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:04,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:18:04,709 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:04,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1039746613] [2021-11-03 05:18:04,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1039746613] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:04,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:04,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:18:04,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053188875] [2021-11-03 05:18:04,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:18:04,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:04,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:18:04,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:18:04,745 INFO L87 Difference]: Start difference. First operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:04,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:04,960 INFO L93 Difference]: Finished difference Result 566 states and 965 transitions. [2021-11-03 05:18:04,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:18:04,962 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-03 05:18:04,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:04,976 INFO L225 Difference]: With dead ends: 566 [2021-11-03 05:18:04,976 INFO L226 Difference]: Without dead ends: 387 [2021-11-03 05:18:04,980 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:18:04,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-03 05:18:05,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 385. [2021-11-03 05:18:05,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.5286458333333333) internal successors, (587), 384 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:05,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 587 transitions. [2021-11-03 05:18:05,041 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 587 transitions. Word has length 37 [2021-11-03 05:18:05,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:05,042 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 587 transitions. [2021-11-03 05:18:05,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:05,042 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 587 transitions. [2021-11-03 05:18:05,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 05:18:05,046 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:05,046 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:18:05,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 05:18:05,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:05,265 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:18:05,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:05,266 INFO L85 PathProgramCache]: Analyzing trace with hash 746604405, now seen corresponding path program 1 times [2021-11-03 05:18:05,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:05,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1683514964] [2021-11-03 05:18:05,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:05,268 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:05,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:05,270 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:05,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 05:18:05,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:05,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:18:05,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:05,888 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:18:05,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:06,207 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:18:06,208 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:06,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1683514964] [2021-11-03 05:18:06,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1683514964] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:06,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:06,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:18:06,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286676952] [2021-11-03 05:18:06,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:18:06,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:06,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:18:06,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:18:06,213 INFO L87 Difference]: Start difference. First operand 385 states and 587 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:06,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:06,995 INFO L93 Difference]: Finished difference Result 882 states and 1357 transitions. [2021-11-03 05:18:06,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:18:06,996 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-03 05:18:06,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:07,001 INFO L225 Difference]: With dead ends: 882 [2021-11-03 05:18:07,001 INFO L226 Difference]: Without dead ends: 631 [2021-11-03 05:18:07,004 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:18:07,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-11-03 05:18:07,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 629. [2021-11-03 05:18:07,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 1.5222929936305734) internal successors, (956), 628 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:07,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 956 transitions. [2021-11-03 05:18:07,044 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 956 transitions. Word has length 60 [2021-11-03 05:18:07,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:07,045 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 956 transitions. [2021-11-03 05:18:07,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:07,045 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 956 transitions. [2021-11-03 05:18:07,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-03 05:18:07,055 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:07,056 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:18:07,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 05:18:07,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:07,275 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:18:07,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:07,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1546935351, now seen corresponding path program 1 times [2021-11-03 05:18:07,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:07,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [285863158] [2021-11-03 05:18:07,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:07,279 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:07,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:07,280 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:07,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 05:18:07,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:07,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:18:07,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:08,300 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:18:08,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:08,810 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:18:08,810 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:08,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [285863158] [2021-11-03 05:18:08,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [285863158] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:08,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:08,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:18:08,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813738254] [2021-11-03 05:18:08,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:18:08,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:08,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:18:08,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:18:08,814 INFO L87 Difference]: Start difference. First operand 629 states and 956 transitions. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 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) [2021-11-03 05:18:09,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:09,373 INFO L93 Difference]: Finished difference Result 1368 states and 2093 transitions. [2021-11-03 05:18:09,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:18:09,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 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 121 [2021-11-03 05:18:09,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:09,381 INFO L225 Difference]: With dead ends: 1368 [2021-11-03 05:18:09,381 INFO L226 Difference]: Without dead ends: 873 [2021-11-03 05:18:09,383 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:18:09,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2021-11-03 05:18:09,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 873. [2021-11-03 05:18:09,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 1.518348623853211) internal successors, (1324), 872 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:09,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1324 transitions. [2021-11-03 05:18:09,426 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1324 transitions. Word has length 121 [2021-11-03 05:18:09,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:09,427 INFO L470 AbstractCegarLoop]: Abstraction has 873 states and 1324 transitions. [2021-11-03 05:18:09,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 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) [2021-11-03 05:18:09,428 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1324 transitions. [2021-11-03 05:18:09,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-03 05:18:09,434 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:09,434 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 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] [2021-11-03 05:18:09,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 05:18:09,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:09,652 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:18:09,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:09,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1117044971, now seen corresponding path program 1 times [2021-11-03 05:18:09,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:09,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1838451818] [2021-11-03 05:18:09,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:09,656 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:09,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:09,657 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:09,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 05:18:10,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:10,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:18:10,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:10,878 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-03 05:18:10,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:11,418 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-03 05:18:11,419 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:11,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1838451818] [2021-11-03 05:18:11,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1838451818] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:11,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:11,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:18:11,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292171363] [2021-11-03 05:18:11,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:18:11,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:11,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:18:11,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:18:11,422 INFO L87 Difference]: Start difference. First operand 873 states and 1324 transitions. Second operand has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:12,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:12,833 INFO L93 Difference]: Finished difference Result 1860 states and 2832 transitions. [2021-11-03 05:18:12,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:18:12,834 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 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 150 [2021-11-03 05:18:12,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:12,843 INFO L225 Difference]: With dead ends: 1860 [2021-11-03 05:18:12,843 INFO L226 Difference]: Without dead ends: 1121 [2021-11-03 05:18:12,845 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:18:12,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2021-11-03 05:18:12,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 1121. [2021-11-03 05:18:12,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 1.5133928571428572) internal successors, (1695), 1120 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:12,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 1695 transitions. [2021-11-03 05:18:12,898 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 1695 transitions. Word has length 150 [2021-11-03 05:18:12,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:12,899 INFO L470 AbstractCegarLoop]: Abstraction has 1121 states and 1695 transitions. [2021-11-03 05:18:12,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:12,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 1695 transitions. [2021-11-03 05:18:12,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-03 05:18:12,903 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:12,904 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:18:12,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:18:13,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:13,123 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:18:13,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:13,124 INFO L85 PathProgramCache]: Analyzing trace with hash -2092203957, now seen corresponding path program 1 times [2021-11-03 05:18:13,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:13,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1115653174] [2021-11-03 05:18:13,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:13,126 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:13,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:13,127 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:13,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 05:18:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:14,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 05:18:14,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:14,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-03 05:18:14,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-03 05:18:14,536 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:18:14,540 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-03 05:18:14,561 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:18:14,564 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-03 05:18:14,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 319 [2021-11-03 05:18:15,086 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-03 05:18:15,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 8 case distinctions, treesize of input 717 treesize of output 669 [2021-11-03 05:18:15,169 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:18:15,171 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-03 05:18:15,180 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:18:15,189 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-03 05:18:15,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 319 [2021-11-03 05:18:15,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,372 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 [2021-11-03 05:18:15,519 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-03 05:18:15,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 13 [2021-11-03 05:18:15,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:15,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 13 [2021-11-03 05:18:15,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-03 05:18:15,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-03 05:18:16,177 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-03 05:18:16,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:16,923 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:18:16,928 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-03 05:18:16,934 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:18:16,937 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-03 05:18:17,108 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:18:17,110 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-03 05:18:17,118 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:18:17,122 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-03 05:18:17,134 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:18:17,142 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-03 05:18:17,158 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:18:17,162 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-03 05:18:17,183 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:18:17,187 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-03 05:18:17,214 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 05:18:17,218 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-03 05:18:17,812 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-03 05:18:17,812 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:17,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1115653174] [2021-11-03 05:18:17,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1115653174] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:17,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:17,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 05:18:17,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46348722] [2021-11-03 05:18:17,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:18:17,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:17,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:18:17,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:18:17,816 INFO L87 Difference]: Start difference. First operand 1121 states and 1695 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:31,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:31,639 INFO L93 Difference]: Finished difference Result 2239 states and 3386 transitions. [2021-11-03 05:18:31,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:18:31,642 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 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 174 [2021-11-03 05:18:31,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:31,650 INFO L225 Difference]: With dead ends: 2239 [2021-11-03 05:18:31,651 INFO L226 Difference]: Without dead ends: 1121 [2021-11-03 05:18:31,653 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 339 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:18:31,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2021-11-03 05:18:31,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 1121. [2021-11-03 05:18:31,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 1.5125) internal successors, (1694), 1120 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:31,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 1694 transitions. [2021-11-03 05:18:31,705 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 1694 transitions. Word has length 174 [2021-11-03 05:18:31,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:31,707 INFO L470 AbstractCegarLoop]: Abstraction has 1121 states and 1694 transitions. [2021-11-03 05:18:31,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:31,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 1694 transitions. [2021-11-03 05:18:31,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-03 05:18:31,714 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:31,715 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:18:31,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 05:18:31,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:31,931 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:18:31,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:31,932 INFO L85 PathProgramCache]: Analyzing trace with hash 834302729, now seen corresponding path program 1 times [2021-11-03 05:18:31,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:31,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1045619683] [2021-11-03 05:18:31,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:31,934 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:31,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:31,936 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:31,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 05:18:33,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:33,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:18:33,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:33,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:33,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:33,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:33,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:33,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:18:33,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:18:33,462 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-03 05:18:33,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-03 05:18:33,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:18:33,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:18:33,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:18:33,910 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-03 05:18:33,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-03 05:18:35,566 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:18:35,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-03 05:18:35,997 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-03 05:18:35,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:36,864 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-03 05:18:36,865 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:36,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1045619683] [2021-11-03 05:18:36,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1045619683] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:36,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:36,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-03 05:18:36,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269674599] [2021-11-03 05:18:36,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 05:18:36,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:36,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 05:18:36,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:18:36,868 INFO L87 Difference]: Start difference. First operand 1121 states and 1694 transitions. Second operand has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:19:12,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:19:12,970 INFO L93 Difference]: Finished difference Result 4230 states and 6418 transitions. [2021-11-03 05:19:12,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:19:12,971 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2021-11-03 05:19:12,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:19:12,990 INFO L225 Difference]: With dead ends: 4230 [2021-11-03 05:19:12,990 INFO L226 Difference]: Without dead ends: 3119 [2021-11-03 05:19:12,993 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 340 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:19:12,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3119 states. [2021-11-03 05:19:13,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3119 to 1345. [2021-11-03 05:19:13,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 1.5476190476190477) internal successors, (2080), 1344 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:19:13,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 2080 transitions. [2021-11-03 05:19:13,120 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 2080 transitions. Word has length 174 [2021-11-03 05:19:13,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:19:13,121 INFO L470 AbstractCegarLoop]: Abstraction has 1345 states and 2080 transitions. [2021-11-03 05:19:13,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:19:13,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 2080 transitions. [2021-11-03 05:19:13,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-03 05:19:13,126 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:19:13,126 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:19:13,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 05:19:13,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:19:13,339 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:19:13,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:19:13,340 INFO L85 PathProgramCache]: Analyzing trace with hash 289430155, now seen corresponding path program 1 times [2021-11-03 05:19:13,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:19:13,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145973875] [2021-11-03 05:19:13,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:19:13,341 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:19:13,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:19:13,342 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:19:13,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 05:19:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:19:14,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:19:14,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:19:14,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:19:14,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:19:14,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:19:14,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:19:14,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:19:14,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:19:14,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:19:14,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:19:14,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:19:14,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:19:14,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:19:14,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:19:14,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:19:14,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:19:14,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:19:14,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:19:14,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:19:14,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:19:15,122 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:19:15,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-03 05:19:16,830 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:19:16,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-03 05:19:17,033 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-03 05:19:17,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:19:17,570 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-03 05:19:17,571 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:19:17,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145973875] [2021-11-03 05:19:17,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145973875] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:19:17,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:19:17,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 05:19:17,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516577874] [2021-11-03 05:19:17,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:19:17,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:19:17,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:19:17,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:19:17,574 INFO L87 Difference]: Start difference. First operand 1345 states and 2080 transitions. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:19:34,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:19:34,980 INFO L93 Difference]: Finished difference Result 3252 states and 5030 transitions. [2021-11-03 05:19:34,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:19:34,984 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 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 174 [2021-11-03 05:19:34,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:19:34,996 INFO L225 Difference]: With dead ends: 3252 [2021-11-03 05:19:34,998 INFO L226 Difference]: Without dead ends: 1917 [2021-11-03 05:19:35,002 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 342 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:19:35,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2021-11-03 05:19:35,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1597. [2021-11-03 05:19:35,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1597 states, 1596 states have (on average 1.5795739348370927) internal successors, (2521), 1596 states have internal predecessors, (2521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:19:35,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1597 states to 1597 states and 2521 transitions. [2021-11-03 05:19:35,114 INFO L78 Accepts]: Start accepts. Automaton has 1597 states and 2521 transitions. Word has length 174 [2021-11-03 05:19:35,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:19:35,114 INFO L470 AbstractCegarLoop]: Abstraction has 1597 states and 2521 transitions. [2021-11-03 05:19:35,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:19:35,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1597 states and 2521 transitions. [2021-11-03 05:19:35,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-03 05:19:35,119 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:19:35,120 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:19:35,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 05:19:35,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:19:35,335 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:19:35,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:19:35,335 INFO L85 PathProgramCache]: Analyzing trace with hash -975340285, now seen corresponding path program 1 times [2021-11-03 05:19:35,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:19:35,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [234269032] [2021-11-03 05:19:35,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:19:35,336 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:19:35,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:19:35,337 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:19:35,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 05:19:36,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:19:36,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:19:36,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:19:36,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:19:37,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:19:37,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:19:37,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:19:37,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:19:37,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:19:37,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:19:37,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:19:37,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:19:37,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:19:37,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:19:37,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:19:37,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:19:37,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:19:37,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:19:37,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:19:37,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:19:37,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:19:37,364 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:19:37,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-03 05:19:38,072 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:19:38,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-03 05:19:38,340 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:19:38,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:19:38,888 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:19:38,894 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:19:38,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [234269032] [2021-11-03 05:19:38,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [234269032] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:19:38,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:19:38,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:19:38,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672760401] [2021-11-03 05:19:38,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:19:38,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:19:38,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:19:38,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:19:38,896 INFO L87 Difference]: Start difference. First operand 1597 states and 2521 transitions. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:20:10,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:20:10,849 INFO L93 Difference]: Finished difference Result 4741 states and 7399 transitions. [2021-11-03 05:20:10,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:20:10,855 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2021-11-03 05:20:10,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:20:10,875 INFO L225 Difference]: With dead ends: 4741 [2021-11-03 05:20:10,875 INFO L226 Difference]: Without dead ends: 3154 [2021-11-03 05:20:10,878 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:20:10,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3154 states. [2021-11-03 05:20:11,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3154 to 1869. [2021-11-03 05:20:11,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 1.5813704496788008) internal successors, (2954), 1868 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:20:11,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 2954 transitions. [2021-11-03 05:20:11,011 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 2954 transitions. Word has length 187 [2021-11-03 05:20:11,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:20:11,011 INFO L470 AbstractCegarLoop]: Abstraction has 1869 states and 2954 transitions. [2021-11-03 05:20:11,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:20:11,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 2954 transitions. [2021-11-03 05:20:11,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-03 05:20:11,029 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:20:11,029 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:20:11,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 05:20:11,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:20:11,254 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:20:11,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:20:11,255 INFO L85 PathProgramCache]: Analyzing trace with hash 988941552, now seen corresponding path program 1 times [2021-11-03 05:20:11,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:20:11,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075731378] [2021-11-03 05:20:11,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:20:11,256 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:20:11,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:20:11,257 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:20:11,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 05:20:12,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:20:12,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:20:12,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:20:13,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:20:13,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:20:13,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:20:13,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:20:13,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:20:13,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:20:13,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:20:13,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:20:13,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:20:13,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:20:13,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:20:13,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:20:13,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:20:13,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:20:13,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:20:13,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:20:13,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:20:13,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:20:13,475 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:20:13,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-03 05:20:13,893 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:20:13,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-03 05:20:14,144 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:20:14,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:20:14,658 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:20:14,658 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:20:14,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075731378] [2021-11-03 05:20:14,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1075731378] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:20:14,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:20:14,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:20:14,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262191552] [2021-11-03 05:20:14,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:20:14,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:20:14,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:20:14,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:20:14,661 INFO L87 Difference]: Start difference. First operand 1869 states and 2954 transitions. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:20:50,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:20:50,410 INFO L93 Difference]: Finished difference Result 4923 states and 7653 transitions. [2021-11-03 05:20:50,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:20:50,411 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 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 188 [2021-11-03 05:20:50,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:20:50,428 INFO L225 Difference]: With dead ends: 4923 [2021-11-03 05:20:50,429 INFO L226 Difference]: Without dead ends: 3064 [2021-11-03 05:20:50,431 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:20:50,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3064 states. [2021-11-03 05:20:50,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3064 to 1869. [2021-11-03 05:20:50,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 1.5626338329764453) internal successors, (2919), 1868 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:20:50,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 2919 transitions. [2021-11-03 05:20:50,567 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 2919 transitions. Word has length 188 [2021-11-03 05:20:50,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:20:50,567 INFO L470 AbstractCegarLoop]: Abstraction has 1869 states and 2919 transitions. [2021-11-03 05:20:50,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:20:50,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 2919 transitions. [2021-11-03 05:20:50,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-03 05:20:50,573 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:20:50,573 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:20:50,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 05:20:50,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:20:50,794 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:20:50,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:20:50,795 INFO L85 PathProgramCache]: Analyzing trace with hash -617202468, now seen corresponding path program 1 times [2021-11-03 05:20:50,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:20:50,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [906000677] [2021-11-03 05:20:50,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:20:50,797 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:20:50,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:20:50,798 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:20:50,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 05:20:52,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:20:52,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:20:52,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:20:52,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:20:52,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:20:52,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:20:52,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:20:52,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:20:52,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:20:52,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:20:52,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:20:52,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:20:52,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:20:52,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:20:52,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:20:52,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:20:52,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:20:52,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:20:52,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:20:52,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:20:52,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:20:53,286 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:20:53,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-03 05:20:53,736 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:20:53,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-03 05:20:53,930 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:20:53,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:20:54,352 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:20:54,352 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:20:54,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [906000677] [2021-11-03 05:20:54,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [906000677] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:20:54,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:20:54,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:20:54,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34468465] [2021-11-03 05:20:54,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:20:54,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:20:54,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:20:54,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:20:54,354 INFO L87 Difference]: Start difference. First operand 1869 states and 2919 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:21:25,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:21:25,930 INFO L93 Difference]: Finished difference Result 5115 states and 7903 transitions. [2021-11-03 05:21:25,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:21:25,931 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2021-11-03 05:21:25,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:21:25,948 INFO L225 Difference]: With dead ends: 5115 [2021-11-03 05:21:25,948 INFO L226 Difference]: Without dead ends: 3256 [2021-11-03 05:21:25,951 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:21:25,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3256 states. [2021-11-03 05:21:26,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3256 to 1965. [2021-11-03 05:21:26,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1964 states have (on average 1.5417515274949083) internal successors, (3028), 1964 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:21:26,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 3028 transitions. [2021-11-03 05:21:26,102 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 3028 transitions. Word has length 188 [2021-11-03 05:21:26,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:21:26,102 INFO L470 AbstractCegarLoop]: Abstraction has 1965 states and 3028 transitions. [2021-11-03 05:21:26,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:21:26,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 3028 transitions. [2021-11-03 05:21:26,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-03 05:21:26,118 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:21:26,118 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:21:26,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 05:21:26,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:21:26,339 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:21:26,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:21:26,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1565412453, now seen corresponding path program 1 times [2021-11-03 05:21:26,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:21:26,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1551326946] [2021-11-03 05:21:26,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:21:26,341 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:21:26,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:21:26,343 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:21:26,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 05:21:27,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:21:27,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:21:27,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:21:28,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:21:28,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:21:28,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:21:28,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:21:28,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:21:28,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:21:28,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:21:28,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:21:28,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:21:28,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:21:28,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:21:28,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:21:28,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:21:28,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:21:28,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:21:28,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:21:28,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:21:28,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:21:28,462 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:21:28,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-03 05:21:29,248 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:21:29,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-03 05:21:29,469 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:21:29,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:21:29,942 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:21:29,943 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:21:29,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1551326946] [2021-11-03 05:21:29,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1551326946] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:21:29,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:21:29,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:21:29,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990496196] [2021-11-03 05:21:29,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:21:29,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:21:29,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:21:29,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:21:29,946 INFO L87 Difference]: Start difference. First operand 1965 states and 3028 transitions. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:22:01,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:22:01,740 INFO L93 Difference]: Finished difference Result 5097 states and 7783 transitions. [2021-11-03 05:22:01,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:22:01,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2021-11-03 05:22:01,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:22:01,758 INFO L225 Difference]: With dead ends: 5097 [2021-11-03 05:22:01,759 INFO L226 Difference]: Without dead ends: 3142 [2021-11-03 05:22:01,761 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:22:01,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3142 states. [2021-11-03 05:22:01,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3142 to 1981. [2021-11-03 05:22:01,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1980 states have (on average 1.5323232323232323) internal successors, (3034), 1980 states have internal predecessors, (3034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:22:01,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 3034 transitions. [2021-11-03 05:22:01,908 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 3034 transitions. Word has length 188 [2021-11-03 05:22:01,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:22:01,908 INFO L470 AbstractCegarLoop]: Abstraction has 1981 states and 3034 transitions. [2021-11-03 05:22:01,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:22:01,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 3034 transitions. [2021-11-03 05:22:01,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-03 05:22:01,914 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:22:01,915 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:22:01,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 05:22:02,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:22:02,130 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:22:02,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:22:02,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1437107291, now seen corresponding path program 1 times [2021-11-03 05:22:02,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:22:02,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [662729890] [2021-11-03 05:22:02,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:22:02,133 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:22:02,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:22:02,134 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:22:02,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 05:22:04,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:22:04,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:22:04,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:22:04,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:22:04,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:22:04,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:22:04,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:22:04,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:22:04,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:22:04,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:22:04,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:22:04,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:22:04,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:22:04,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:22:04,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:22:04,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:22:04,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:22:04,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:22:04,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:22:04,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:22:04,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:22:04,810 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:22:04,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-03 05:22:05,511 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:22:05,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-03 05:22:05,723 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:22:05,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:22:06,192 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:22:06,192 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:22:06,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [662729890] [2021-11-03 05:22:06,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [662729890] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:22:06,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:22:06,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:22:06,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535659624] [2021-11-03 05:22:06,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:22:06,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:22:06,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:22:06,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:22:06,194 INFO L87 Difference]: Start difference. First operand 1981 states and 3034 transitions. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:22:32,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:22:32,978 INFO L93 Difference]: Finished difference Result 5095 states and 7745 transitions. [2021-11-03 05:22:32,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:22:32,980 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2021-11-03 05:22:32,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:22:32,994 INFO L225 Difference]: With dead ends: 5095 [2021-11-03 05:22:32,995 INFO L226 Difference]: Without dead ends: 3124 [2021-11-03 05:22:32,997 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:22:33,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3124 states. [2021-11-03 05:22:33,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3124 to 1981. [2021-11-03 05:22:33,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1980 states have (on average 1.5191919191919192) internal successors, (3008), 1980 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:22:33,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 3008 transitions. [2021-11-03 05:22:33,144 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 3008 transitions. Word has length 188 [2021-11-03 05:22:33,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:22:33,144 INFO L470 AbstractCegarLoop]: Abstraction has 1981 states and 3008 transitions. [2021-11-03 05:22:33,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:22:33,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 3008 transitions. [2021-11-03 05:22:33,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-03 05:22:33,149 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:22:33,150 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:22:33,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 05:22:33,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:22:33,363 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:22:33,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:22:33,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1627778118, now seen corresponding path program 1 times [2021-11-03 05:22:33,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:22:33,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [822353888] [2021-11-03 05:22:33,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:22:33,365 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:22:33,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:22:33,366 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:22:33,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 05:22:35,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:22:35,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:22:35,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:22:35,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:22:35,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:22:35,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:22:35,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:22:35,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:22:35,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:22:35,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:22:35,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:22:35,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:22:35,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:22:35,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:22:35,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:22:35,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:22:35,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:22:35,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:22:35,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:22:35,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:22:35,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:22:36,188 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:22:36,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-03 05:22:36,643 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:22:36,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-03 05:22:36,857 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:22:36,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:22:37,305 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:22:37,305 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:22:37,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [822353888] [2021-11-03 05:22:37,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [822353888] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:22:37,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:22:37,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:22:37,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925663135] [2021-11-03 05:22:37,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:22:37,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:22:37,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:22:37,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:22:37,307 INFO L87 Difference]: Start difference. First operand 1981 states and 3008 transitions. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:23:13,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:23:13,038 INFO L93 Difference]: Finished difference Result 5191 states and 7853 transitions. [2021-11-03 05:23:13,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:23:13,039 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 189 [2021-11-03 05:23:13,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:23:13,048 INFO L225 Difference]: With dead ends: 5191 [2021-11-03 05:23:13,048 INFO L226 Difference]: Without dead ends: 3220 [2021-11-03 05:23:13,050 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:23:13,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2021-11-03 05:23:13,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 1989. [2021-11-03 05:23:13,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1989 states, 1988 states have (on average 1.5035211267605635) internal successors, (2989), 1988 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:23:13,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 2989 transitions. [2021-11-03 05:23:13,199 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 2989 transitions. Word has length 189 [2021-11-03 05:23:13,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:23:13,200 INFO L470 AbstractCegarLoop]: Abstraction has 1989 states and 2989 transitions. [2021-11-03 05:23:13,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:23:13,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 2989 transitions. [2021-11-03 05:23:13,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-03 05:23:13,205 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:23:13,205 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:23:13,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 05:23:13,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:23:13,419 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:23:13,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:23:13,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1146228617, now seen corresponding path program 1 times [2021-11-03 05:23:13,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:23:13,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1728824962] [2021-11-03 05:23:13,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:23:13,429 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:23:13,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:23:13,430 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:23:13,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 05:23:15,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:23:15,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:23:15,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:23:16,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:23:16,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:23:16,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:23:16,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:23:16,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:23:16,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:23:16,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:23:16,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:23:16,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:23:16,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:23:16,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:23:16,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:23:16,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:23:16,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:23:16,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:23:16,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:23:16,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:23:16,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:23:16,547 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:23:16,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-03 05:23:17,074 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:23:17,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-03 05:23:17,346 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:23:17,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:23:17,871 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:23:17,871 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:23:17,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1728824962] [2021-11-03 05:23:17,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1728824962] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:23:17,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:23:17,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:23:17,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185369987] [2021-11-03 05:23:17,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:23:17,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:23:17,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:23:17,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:23:17,873 INFO L87 Difference]: Start difference. First operand 1989 states and 2989 transitions. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:23:48,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:23:48,569 INFO L93 Difference]: Finished difference Result 5327 states and 7979 transitions. [2021-11-03 05:23:48,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:23:48,571 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-11-03 05:23:48,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:23:48,578 INFO L225 Difference]: With dead ends: 5327 [2021-11-03 05:23:48,578 INFO L226 Difference]: Without dead ends: 3348 [2021-11-03 05:23:48,588 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:23:48,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3348 states. [2021-11-03 05:23:48,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3348 to 2214. [2021-11-03 05:23:48,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2214 states, 2213 states have (on average 1.4771802982376865) internal successors, (3269), 2213 states have internal predecessors, (3269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:23:48,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2214 states to 2214 states and 3269 transitions. [2021-11-03 05:23:48,774 INFO L78 Accepts]: Start accepts. Automaton has 2214 states and 3269 transitions. Word has length 190 [2021-11-03 05:23:48,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:23:48,774 INFO L470 AbstractCegarLoop]: Abstraction has 2214 states and 3269 transitions. [2021-11-03 05:23:48,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:23:48,775 INFO L276 IsEmpty]: Start isEmpty. Operand 2214 states and 3269 transitions. [2021-11-03 05:23:48,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-03 05:23:48,820 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:23:48,821 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:23:48,879 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-03 05:23:49,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:23:49,021 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:23:49,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:23:49,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1653439691, now seen corresponding path program 1 times [2021-11-03 05:23:49,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:23:49,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [847527813] [2021-11-03 05:23:49,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:23:49,024 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:23:49,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:23:49,025 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:23:49,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 05:23:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:23:51,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:23:51,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:23:51,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:23:51,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:23:51,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:23:51,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:23:51,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:23:51,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:23:51,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:23:51,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:23:51,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:23:51,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:23:51,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:23:51,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:23:51,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:23:51,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:23:51,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:23:51,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:23:51,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:23:51,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:23:51,712 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:23:51,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-03 05:23:52,285 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:23:52,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-03 05:23:52,505 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:23:52,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:23:52,957 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:23:52,958 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:23:52,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [847527813] [2021-11-03 05:23:52,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [847527813] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:23:52,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:23:52,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:23:52,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099737100] [2021-11-03 05:23:52,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:23:52,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:23:52,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:23:52,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:23:52,960 INFO L87 Difference]: Start difference. First operand 2214 states and 3269 transitions. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:24:26,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:24:26,801 INFO L93 Difference]: Finished difference Result 5381 states and 7981 transitions. [2021-11-03 05:24:26,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:24:26,802 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2021-11-03 05:24:26,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:24:26,807 INFO L225 Difference]: With dead ends: 5381 [2021-11-03 05:24:26,807 INFO L226 Difference]: Without dead ends: 3177 [2021-11-03 05:24:26,809 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:24:26,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3177 states. [2021-11-03 05:24:26,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3177 to 2115. [2021-11-03 05:24:26,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2115 states, 2114 states have (on average 1.4659413434247872) internal successors, (3099), 2114 states have internal predecessors, (3099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:24:26,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2115 states to 2115 states and 3099 transitions. [2021-11-03 05:24:26,930 INFO L78 Accepts]: Start accepts. Automaton has 2115 states and 3099 transitions. Word has length 191 [2021-11-03 05:24:26,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:24:26,930 INFO L470 AbstractCegarLoop]: Abstraction has 2115 states and 3099 transitions. [2021-11-03 05:24:26,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:24:26,931 INFO L276 IsEmpty]: Start isEmpty. Operand 2115 states and 3099 transitions. [2021-11-03 05:24:26,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-03 05:24:26,947 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:24:26,947 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:24:26,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 05:24:27,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:24:27,167 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:24:27,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:24:27,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1981897227, now seen corresponding path program 1 times [2021-11-03 05:24:27,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:24:27,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1091270877] [2021-11-03 05:24:27,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:24:27,170 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:24:27,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:24:27,171 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:24:27,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 05:24:29,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:24:29,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:24:29,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:24:29,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:24:29,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:24:29,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:24:29,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:24:29,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:24:29,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:24:29,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:24:29,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:24:29,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:24:29,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:24:29,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:24:29,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:24:29,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:24:29,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:24:29,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:24:29,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:24:29,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:24:29,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:24:29,951 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:24:29,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-03 05:24:30,744 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:24:30,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-03 05:24:30,953 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:24:30,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:24:31,433 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:24:31,433 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:24:31,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1091270877] [2021-11-03 05:24:31,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1091270877] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:24:31,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:24:31,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:24:31,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198558892] [2021-11-03 05:24:31,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:24:31,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:24:31,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:24:31,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:24:31,435 INFO L87 Difference]: Start difference. First operand 2115 states and 3099 transitions. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:25:07,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:25:07,618 INFO L93 Difference]: Finished difference Result 5253 states and 7721 transitions. [2021-11-03 05:25:07,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:25:07,620 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2021-11-03 05:25:07,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:25:07,632 INFO L225 Difference]: With dead ends: 5253 [2021-11-03 05:25:07,632 INFO L226 Difference]: Without dead ends: 3384 [2021-11-03 05:25:07,634 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:25:07,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3384 states. [2021-11-03 05:25:07,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3384 to 2294. [2021-11-03 05:25:07,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2294 states, 2293 states have (on average 1.4452682075883123) internal successors, (3314), 2293 states have internal predecessors, (3314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:25:07,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2294 states to 2294 states and 3314 transitions. [2021-11-03 05:25:07,749 INFO L78 Accepts]: Start accepts. Automaton has 2294 states and 3314 transitions. Word has length 191 [2021-11-03 05:25:07,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:25:07,750 INFO L470 AbstractCegarLoop]: Abstraction has 2294 states and 3314 transitions. [2021-11-03 05:25:07,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:25:07,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2294 states and 3314 transitions. [2021-11-03 05:25:07,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-03 05:25:07,755 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:25:07,755 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:25:07,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 05:25:07,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:25:07,971 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:25:07,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:25:07,972 INFO L85 PathProgramCache]: Analyzing trace with hash 468579752, now seen corresponding path program 1 times [2021-11-03 05:25:07,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:25:07,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1253162998] [2021-11-03 05:25:07,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:25:07,973 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:25:07,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:25:07,974 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:25:07,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 05:25:10,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:25:10,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:25:10,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:25:10,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:25:10,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:25:10,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:25:10,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:25:10,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:25:10,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:25:10,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:25:10,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:25:10,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:25:10,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:25:10,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:25:10,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:25:10,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:25:10,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:25:10,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:25:10,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:25:10,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:25:10,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:25:10,732 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:25:10,733 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 [2021-11-03 05:25:11,589 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:25:11,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-03 05:25:11,785 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:25:11,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:25:12,342 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:25:12,342 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:25:12,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1253162998] [2021-11-03 05:25:12,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1253162998] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:25:12,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:25:12,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:25:12,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913513566] [2021-11-03 05:25:12,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:25:12,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:25:12,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:25:12,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:25:12,345 INFO L87 Difference]: Start difference. First operand 2294 states and 3314 transitions. Second operand has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:25:44,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:25:44,208 INFO L93 Difference]: Finished difference Result 5423 states and 7898 transitions. [2021-11-03 05:25:44,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:25:44,209 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2021-11-03 05:25:44,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:25:44,232 INFO L225 Difference]: With dead ends: 5423 [2021-11-03 05:25:44,232 INFO L226 Difference]: Without dead ends: 3395 [2021-11-03 05:25:44,234 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:25:44,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3395 states. [2021-11-03 05:25:44,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3395 to 2322. [2021-11-03 05:25:44,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2322 states, 2321 states have (on average 1.4364498061180526) internal successors, (3334), 2321 states have internal predecessors, (3334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:25:44,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2322 states to 2322 states and 3334 transitions. [2021-11-03 05:25:44,411 INFO L78 Accepts]: Start accepts. Automaton has 2322 states and 3334 transitions. Word has length 192 [2021-11-03 05:25:44,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:25:44,411 INFO L470 AbstractCegarLoop]: Abstraction has 2322 states and 3334 transitions. [2021-11-03 05:25:44,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:25:44,412 INFO L276 IsEmpty]: Start isEmpty. Operand 2322 states and 3334 transitions. [2021-11-03 05:25:44,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-03 05:25:44,416 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:25:44,416 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:25:44,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-03 05:25:44,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:25:44,631 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:25:44,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:25:44,632 INFO L85 PathProgramCache]: Analyzing trace with hash -2055877882, now seen corresponding path program 1 times [2021-11-03 05:25:44,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:25:44,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [231156427] [2021-11-03 05:25:44,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:25:44,633 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:25:44,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:25:44,634 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:25:44,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 05:25:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:25:47,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:25:47,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:25:47,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:25:47,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:25:47,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:25:47,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:25:47,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:25:47,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:25:47,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:25:47,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:25:47,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:25:47,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:25:47,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:25:47,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:25:47,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:25:47,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:25:47,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:25:47,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:25:47,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:25:47,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:25:47,571 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:25:47,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-03 05:25:48,486 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:25:48,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-03 05:25:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:25:48,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:25:49,242 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:25:49,242 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:25:49,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [231156427] [2021-11-03 05:25:49,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [231156427] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:25:49,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:25:49,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:25:49,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805819839] [2021-11-03 05:25:49,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:25:49,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:25:49,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:25:49,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:25:49,245 INFO L87 Difference]: Start difference. First operand 2322 states and 3334 transitions. Second operand has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:26:19,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:26:19,409 INFO L93 Difference]: Finished difference Result 5592 states and 8073 transitions. [2021-11-03 05:26:19,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:26:19,410 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 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 193 [2021-11-03 05:26:19,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:26:19,416 INFO L225 Difference]: With dead ends: 5592 [2021-11-03 05:26:19,416 INFO L226 Difference]: Without dead ends: 3549 [2021-11-03 05:26:19,418 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:26:19,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3549 states. [2021-11-03 05:26:19,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3549 to 2519. [2021-11-03 05:26:19,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2519 states, 2518 states have (on average 1.4166004765687052) internal successors, (3567), 2518 states have internal predecessors, (3567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:26:19,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2519 states to 2519 states and 3567 transitions. [2021-11-03 05:26:19,617 INFO L78 Accepts]: Start accepts. Automaton has 2519 states and 3567 transitions. Word has length 193 [2021-11-03 05:26:19,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:26:19,617 INFO L470 AbstractCegarLoop]: Abstraction has 2519 states and 3567 transitions. [2021-11-03 05:26:19,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:26:19,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2519 states and 3567 transitions. [2021-11-03 05:26:19,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-03 05:26:19,622 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:26:19,622 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:26:19,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 05:26:19,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:26:19,835 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:26:19,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:26:19,836 INFO L85 PathProgramCache]: Analyzing trace with hash 967910484, now seen corresponding path program 1 times [2021-11-03 05:26:19,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:26:19,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1336189040] [2021-11-03 05:26:19,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:26:19,837 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:26:19,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:26:19,837 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:26:19,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 05:26:22,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:26:22,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:26:22,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:26:22,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:26:22,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:26:22,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:26:22,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:26:22,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:26:22,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:26:22,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:26:22,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:26:22,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:26:22,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:26:22,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:26:22,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:26:22,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:26:22,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:26:22,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:26:22,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:26:22,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:26:22,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:26:22,952 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:26:22,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-03 05:26:23,945 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:26:23,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-03 05:26:24,159 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:26:24,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:26:24,662 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:26:24,663 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:26:24,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1336189040] [2021-11-03 05:26:24,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1336189040] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:26:24,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:26:24,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:26:24,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844810233] [2021-11-03 05:26:24,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:26:24,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:26:24,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:26:24,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:26:24,665 INFO L87 Difference]: Start difference. First operand 2519 states and 3567 transitions. Second operand has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:26:58,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:26:58,408 INFO L93 Difference]: Finished difference Result 6212 states and 8851 transitions. [2021-11-03 05:26:58,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:26:58,410 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2021-11-03 05:26:58,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:26:58,416 INFO L225 Difference]: With dead ends: 6212 [2021-11-03 05:26:58,416 INFO L226 Difference]: Without dead ends: 3714 [2021-11-03 05:26:58,418 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:26:58,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3714 states. [2021-11-03 05:26:58,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3714 to 2703. [2021-11-03 05:26:58,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2703 states, 2702 states have (on average 1.3993338267949667) internal successors, (3781), 2702 states have internal predecessors, (3781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:26:58,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2703 states to 2703 states and 3781 transitions. [2021-11-03 05:26:58,645 INFO L78 Accepts]: Start accepts. Automaton has 2703 states and 3781 transitions. Word has length 196 [2021-11-03 05:26:58,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:26:58,646 INFO L470 AbstractCegarLoop]: Abstraction has 2703 states and 3781 transitions. [2021-11-03 05:26:58,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:26:58,646 INFO L276 IsEmpty]: Start isEmpty. Operand 2703 states and 3781 transitions. [2021-11-03 05:26:58,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-03 05:26:58,650 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:26:58,651 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:26:58,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 05:26:58,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:26:58,875 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:26:58,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:26:58,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1968533010, now seen corresponding path program 1 times [2021-11-03 05:26:58,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:26:58,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1281894747] [2021-11-03 05:26:58,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:26:58,877 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:26:58,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:26:58,877 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:26:58,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 05:27:01,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:27:01,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:27:01,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:27:01,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:27:01,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:27:01,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:27:01,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:27:01,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:27:01,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:27:01,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:27:01,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:27:01,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:27:01,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:27:01,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:27:01,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:27:01,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:27:01,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:27:01,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:27:01,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:27:01,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:27:01,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:27:01,917 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:27:01,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-03 05:27:03,014 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:27:03,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-03 05:27:03,240 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:27:03,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:27:03,778 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:27:03,778 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:27:03,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1281894747] [2021-11-03 05:27:03,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1281894747] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:27:03,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:27:03,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:27:03,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863878631] [2021-11-03 05:27:03,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:27:03,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:27:03,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:27:03,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:27:03,780 INFO L87 Difference]: Start difference. First operand 2703 states and 3781 transitions. Second operand has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:35,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:27:35,173 INFO L93 Difference]: Finished difference Result 6342 states and 8963 transitions. [2021-11-03 05:27:35,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:27:35,175 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 197 [2021-11-03 05:27:35,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:27:35,178 INFO L225 Difference]: With dead ends: 6342 [2021-11-03 05:27:35,178 INFO L226 Difference]: Without dead ends: 3660 [2021-11-03 05:27:35,180 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:27:35,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3660 states. [2021-11-03 05:27:35,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3660 to 2711. [2021-11-03 05:27:35,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2711 states, 2710 states have (on average 1.3915129151291512) internal successors, (3771), 2710 states have internal predecessors, (3771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:35,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 3771 transitions. [2021-11-03 05:27:35,383 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 3771 transitions. Word has length 197 [2021-11-03 05:27:35,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:27:35,383 INFO L470 AbstractCegarLoop]: Abstraction has 2711 states and 3771 transitions. [2021-11-03 05:27:35,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:27:35,383 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 3771 transitions. [2021-11-03 05:27:35,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-03 05:27:35,388 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:27:35,388 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:27:35,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-03 05:27:35,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:27:35,607 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:27:35,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:27:35,608 INFO L85 PathProgramCache]: Analyzing trace with hash -522942010, now seen corresponding path program 1 times [2021-11-03 05:27:35,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:27:35,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1967934363] [2021-11-03 05:27:35,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:27:35,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:27:35,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:27:35,610 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:27:35,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 05:27:38,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:27:38,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:27:38,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:27:38,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:27:38,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:27:38,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:27:38,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:27:38,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:27:38,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:27:38,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:27:38,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:27:38,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:27:38,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:27:38,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:27:38,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:27:38,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:27:38,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:27:38,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:27:38,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:27:38,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:27:38,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:27:38,767 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-03 05:27:38,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-03 05:27:39,962 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-03 05:27:39,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-03 05:27:40,160 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:27:40,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:27:40,676 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-03 05:27:40,676 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:27:40,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1967934363] [2021-11-03 05:27:40,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1967934363] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:27:40,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:27:40,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:27:40,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069120501] [2021-11-03 05:27:40,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:27:40,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:27:40,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:27:40,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:27:40,678 INFO L87 Difference]: Start difference. First operand 2711 states and 3771 transitions. Second operand has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:28:08,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:28:08,175 INFO L93 Difference]: Finished difference Result 6301 states and 8863 transitions. [2021-11-03 05:28:08,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:28:08,176 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 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 197 [2021-11-03 05:28:08,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:28:08,181 INFO L225 Difference]: With dead ends: 6301 [2021-11-03 05:28:08,181 INFO L226 Difference]: Without dead ends: 3611 [2021-11-03 05:28:08,184 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:28:08,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3611 states. [2021-11-03 05:28:08,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3611 to 2728. [2021-11-03 05:28:08,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2728 states, 2727 states have (on average 1.3887055372203887) internal successors, (3787), 2727 states have internal predecessors, (3787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:28:08,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2728 states to 2728 states and 3787 transitions. [2021-11-03 05:28:08,388 INFO L78 Accepts]: Start accepts. Automaton has 2728 states and 3787 transitions. Word has length 197 [2021-11-03 05:28:08,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:28:08,388 INFO L470 AbstractCegarLoop]: Abstraction has 2728 states and 3787 transitions. [2021-11-03 05:28:08,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:28:08,388 INFO L276 IsEmpty]: Start isEmpty. Operand 2728 states and 3787 transitions. [2021-11-03 05:28:08,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-03 05:28:08,391 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:28:08,392 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:28:08,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-03 05:28:08,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:28:08,592 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:28:08,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:28:08,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1162661829, now seen corresponding path program 1 times [2021-11-03 05:28:08,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:28:08,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2021273054] [2021-11-03 05:28:08,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:28:08,594 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:28:08,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:28:08,595 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:28:08,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b7aed64-7c1e-44d8-813f-3f810fa1a30e/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 05:28:11,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:28:11,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:28:11,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:28:11,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 138 [2021-11-03 05:28:11,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 90 [2021-11-03 05:28:11,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:28:11,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:28:11,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:28:11,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:28:11,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 05:28:11,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:28:11,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:28:11,541 INFO L190 IndexEqualityManager]: detected not equals via solver