./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec0_product26.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec0_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2214b99fc6848bca0f24e9e72f44d1848092675b0f72a15c952711ed7656fcb1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:39:31,266 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:39:31,268 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:39:31,309 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:39:31,310 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:39:31,311 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:39:31,313 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:39:31,315 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:39:31,317 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:39:31,319 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:39:31,320 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:39:31,321 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:39:31,322 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:39:31,323 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:39:31,324 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:39:31,326 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:39:31,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:39:31,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:39:31,330 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:39:31,333 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:39:31,335 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:39:31,336 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:39:31,338 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:39:31,339 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:39:31,343 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:39:31,343 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:39:31,344 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:39:31,345 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:39:31,345 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:39:31,347 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:39:31,347 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:39:31,348 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:39:31,349 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:39:31,350 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:39:31,351 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:39:31,352 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:39:31,352 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:39:31,353 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:39:31,353 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:39:31,354 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:39:31,355 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:39:31,356 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:39:31,384 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:39:31,384 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:39:31,385 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:39:31,385 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:39:31,386 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:39:31,386 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:39:31,386 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:39:31,386 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:39:31,387 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:39:31,387 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:39:31,387 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:39:31,387 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:39:31,388 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:39:31,388 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:39:31,388 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:39:31,389 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:39:31,389 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:39:31,389 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:39:31,390 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:39:31,390 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:39:31,390 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:39:31,390 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:39:31,391 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:39:31,391 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:39:31,391 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:39:31,391 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:39:31,392 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:39:31,392 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:39:31,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:39:31,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:39:31,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:39:31,393 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:39:31,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:39:31,393 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:39:31,394 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:39:31,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:39:31,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:39:31,394 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:39:31,394 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:39:31,395 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_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2214b99fc6848bca0f24e9e72f44d1848092675b0f72a15c952711ed7656fcb1 [2021-11-07 01:39:31,630 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:39:31,654 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:39:31,657 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:39:31,658 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:39:31,659 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:39:31,660 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec0_product26.cil.c [2021-11-07 01:39:31,732 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/data/a2387d36c/9117c54bb4234295b5f6ebd3cec5a587/FLAG9a3d455d9 [2021-11-07 01:39:32,417 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:39:32,420 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/sv-benchmarks/c/product-lines/email_spec0_product26.cil.c [2021-11-07 01:39:32,445 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/data/a2387d36c/9117c54bb4234295b5f6ebd3cec5a587/FLAG9a3d455d9 [2021-11-07 01:39:32,613 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/data/a2387d36c/9117c54bb4234295b5f6ebd3cec5a587 [2021-11-07 01:39:32,615 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:39:32,616 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:39:32,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:39:32,620 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:39:32,623 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:39:32,624 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:39:32" (1/1) ... [2021-11-07 01:39:32,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a57762 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:32, skipping insertion in model container [2021-11-07 01:39:32,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:39:32" (1/1) ... [2021-11-07 01:39:32,637 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:39:32,698 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:39:33,308 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_6eb55992-e1fa-416b-ac3c-58f28c7de575/sv-benchmarks/c/product-lines/email_spec0_product26.cil.c[63882,63895] [2021-11-07 01:39:33,311 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:39:33,323 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:39:33,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@74f45d01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:33, skipping insertion in model container [2021-11-07 01:39:33,324 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:39:33,324 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:39:33,326 INFO L168 Benchmark]: Toolchain (without parser) took 708.79 ms. Allocated memory was 107.0 MB in the beginning and 144.7 MB in the end (delta: 37.7 MB). Free memory was 71.9 MB in the beginning and 105.6 MB in the end (delta: -33.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:39:33,328 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 107.0 MB. Free memory is still 62.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:39:33,329 INFO L168 Benchmark]: CACSL2BoogieTranslator took 704.77 ms. Allocated memory was 107.0 MB in the beginning and 144.7 MB in the end (delta: 37.7 MB). Free memory was 71.6 MB in the beginning and 105.6 MB in the end (delta: -34.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:39:33,331 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 107.0 MB. Free memory is still 62.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 704.77 ms. Allocated memory was 107.0 MB in the beginning and 144.7 MB in the end (delta: 37.7 MB). Free memory was 71.6 MB in the beginning and 105.6 MB in the end (delta: -34.0 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: 2621]: 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_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec0_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2214b99fc6848bca0f24e9e72f44d1848092675b0f72a15c952711ed7656fcb1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:39:35,626 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:39:35,629 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:39:35,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:39:35,685 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:39:35,691 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:39:35,693 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:39:35,697 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:39:35,701 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:39:35,711 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:39:35,713 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:39:35,715 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:39:35,715 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:39:35,718 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:39:35,720 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:39:35,725 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:39:35,727 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:39:35,728 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:39:35,738 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:39:35,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:39:35,742 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:39:35,743 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:39:35,745 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:39:35,746 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:39:35,749 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:39:35,750 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:39:35,750 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:39:35,751 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:39:35,752 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:39:35,753 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:39:35,753 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:39:35,754 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:39:35,755 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:39:35,756 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:39:35,757 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:39:35,757 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:39:35,758 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:39:35,758 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:39:35,758 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:39:35,759 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:39:35,760 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:39:35,761 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:39:35,786 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:39:35,787 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:39:35,787 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:39:35,788 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:39:35,788 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:39:35,788 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:39:35,788 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:39:35,789 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:39:35,789 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:39:35,790 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:39:35,790 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:39:35,790 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:39:35,790 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:39:35,791 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:39:35,791 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:39:35,791 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:39:35,791 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:39:35,791 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:39:35,792 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:39:35,792 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:39:35,792 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:39:35,792 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:39:35,792 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:39:35,793 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:39:35,793 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:39:35,793 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:39:35,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:39:35,794 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:39:35,794 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:39:35,794 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:39:35,794 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:39:35,795 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:39:35,795 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:39:35,795 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:39:35,795 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:39:35,795 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_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2214b99fc6848bca0f24e9e72f44d1848092675b0f72a15c952711ed7656fcb1 [2021-11-07 01:39:36,174 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:39:36,203 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:39:36,207 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:39:36,208 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:39:36,209 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:39:36,212 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec0_product26.cil.c [2021-11-07 01:39:36,282 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/data/ecd4b5bda/42dfbc121c434760917f8d8b68c5d79e/FLAG75a6b6d94 [2021-11-07 01:39:36,969 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:39:36,970 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/sv-benchmarks/c/product-lines/email_spec0_product26.cil.c [2021-11-07 01:39:36,997 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/data/ecd4b5bda/42dfbc121c434760917f8d8b68c5d79e/FLAG75a6b6d94 [2021-11-07 01:39:37,175 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/data/ecd4b5bda/42dfbc121c434760917f8d8b68c5d79e [2021-11-07 01:39:37,178 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:39:37,179 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:39:37,181 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:39:37,181 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:39:37,189 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:39:37,189 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:39:37" (1/1) ... [2021-11-07 01:39:37,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54b4d84c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:37, skipping insertion in model container [2021-11-07 01:39:37,193 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:39:37" (1/1) ... [2021-11-07 01:39:37,201 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:39:37,309 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:39:37,857 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_6eb55992-e1fa-416b-ac3c-58f28c7de575/sv-benchmarks/c/product-lines/email_spec0_product26.cil.c[63882,63895] [2021-11-07 01:39:37,860 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:39:37,890 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:39:37,923 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:39:38,111 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_6eb55992-e1fa-416b-ac3c-58f28c7de575/sv-benchmarks/c/product-lines/email_spec0_product26.cil.c[63882,63895] [2021-11-07 01:39:38,111 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:39:38,132 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:39:38,239 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_6eb55992-e1fa-416b-ac3c-58f28c7de575/sv-benchmarks/c/product-lines/email_spec0_product26.cil.c[63882,63895] [2021-11-07 01:39:38,247 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:39:38,284 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:39:38,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:38 WrapperNode [2021-11-07 01:39:38,285 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:39:38,286 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:39:38,287 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:39:38,287 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:39:38,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:38" (1/1) ... [2021-11-07 01:39:38,325 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:38" (1/1) ... [2021-11-07 01:39:38,507 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:39:38,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:39:38,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:39:38,508 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:39:38,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:38" (1/1) ... [2021-11-07 01:39:38,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:38" (1/1) ... [2021-11-07 01:39:38,547 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:38" (1/1) ... [2021-11-07 01:39:38,548 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:38" (1/1) ... [2021-11-07 01:39:38,600 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:38" (1/1) ... [2021-11-07 01:39:38,634 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:38" (1/1) ... [2021-11-07 01:39:38,650 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:38" (1/1) ... [2021-11-07 01:39:38,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:39:38,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:39:38,728 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:39:38,728 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:39:38,729 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:38" (1/1) ... [2021-11-07 01:39:38,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:39:38,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:39:38,757 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:39:38,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:39:38,799 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:39:38,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:39:38,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:39:38,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:39:38,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:39:44,521 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:39:44,521 INFO L299 CfgBuilder]: Removed 725 assume(true) statements. [2021-11-07 01:39:44,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:39:44 BoogieIcfgContainer [2021-11-07 01:39:44,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:39:44,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:39:44,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:39:44,530 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:39:44,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:39:37" (1/3) ... [2021-11-07 01:39:44,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15bc3e5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:39:44, skipping insertion in model container [2021-11-07 01:39:44,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:38" (2/3) ... [2021-11-07 01:39:44,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15bc3e5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:39:44, skipping insertion in model container [2021-11-07 01:39:44,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:39:44" (3/3) ... [2021-11-07 01:39:44,534 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec0_product26.cil.c [2021-11-07 01:39:44,539 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:39:44,539 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:39:44,591 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:39:44,597 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:39:44,597 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:39:44,645 INFO L276 IsEmpty]: Start isEmpty. Operand has 1026 states, 1019 states have (on average 1.7262021589793917) internal successors, (1759), 1025 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:44,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:39:44,662 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:44,663 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:39:44,663 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:39:44,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:44,669 INFO L85 PathProgramCache]: Analyzing trace with hash -590532666, now seen corresponding path program 1 times [2021-11-07 01:39:44,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:44,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1928209282] [2021-11-07 01:39:44,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:44,685 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:44,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:44,689 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:44,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:39:45,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:45,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:39:45,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:45,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:45,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:45,608 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:45,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1928209282] [2021-11-07 01:39:45,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1928209282] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:45,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:45,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:39:45,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475298060] [2021-11-07 01:39:45,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:39:45,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:45,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:39:45,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:39:45,634 INFO L87 Difference]: Start difference. First operand has 1026 states, 1019 states have (on average 1.7262021589793917) internal successors, (1759), 1025 states have internal predecessors, (1759), 0 states have call successors, (0), 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 2 states, 2 states have (on average 30.5) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:45,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:45,740 INFO L93 Difference]: Finished difference Result 1763 states and 2988 transitions. [2021-11-07 01:39:45,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:39:45,742 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 30.5) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 01:39:45,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:45,769 INFO L225 Difference]: With dead ends: 1763 [2021-11-07 01:39:45,769 INFO L226 Difference]: Without dead ends: 974 [2021-11-07 01:39:45,778 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:39:45,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2021-11-07 01:39:45,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 974. [2021-11-07 01:39:45,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 968 states have (on average 1.7231404958677685) internal successors, (1668), 973 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:45,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1668 transitions. [2021-11-07 01:39:45,897 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1668 transitions. Word has length 61 [2021-11-07 01:39:45,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:45,897 INFO L470 AbstractCegarLoop]: Abstraction has 974 states and 1668 transitions. [2021-11-07 01:39:45,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 30.5) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:45,898 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1668 transitions. [2021-11-07 01:39:45,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:39:45,909 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:45,909 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:39:45,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:46,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:46,124 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:39:46,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:46,124 INFO L85 PathProgramCache]: Analyzing trace with hash -407408837, now seen corresponding path program 1 times [2021-11-07 01:39:46,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:46,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [619786076] [2021-11-07 01:39:46,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:46,126 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:46,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:46,127 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:46,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:39:46,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:46,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:39:46,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:46,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:46,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:46,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:46,930 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:46,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [619786076] [2021-11-07 01:39:46,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [619786076] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:46,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:46,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:39:46,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213919310] [2021-11-07 01:39:46,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:39:46,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:46,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:39:46,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:39:46,937 INFO L87 Difference]: Start difference. First operand 974 states and 1668 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:47,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:47,084 INFO L93 Difference]: Finished difference Result 2892 states and 4956 transitions. [2021-11-07 01:39:47,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:39:47,085 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 01:39:47,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:47,118 INFO L225 Difference]: With dead ends: 2892 [2021-11-07 01:39:47,118 INFO L226 Difference]: Without dead ends: 1933 [2021-11-07 01:39:47,121 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:39:47,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2021-11-07 01:39:47,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 973. [2021-11-07 01:39:47,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 967 states have (on average 1.719751809720786) internal successors, (1663), 972 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:47,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1663 transitions. [2021-11-07 01:39:47,183 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1663 transitions. Word has length 62 [2021-11-07 01:39:47,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:47,185 INFO L470 AbstractCegarLoop]: Abstraction has 973 states and 1663 transitions. [2021-11-07 01:39:47,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:47,185 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1663 transitions. [2021-11-07 01:39:47,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:39:47,194 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:47,195 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:39:47,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:47,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:47,408 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:39:47,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:47,409 INFO L85 PathProgramCache]: Analyzing trace with hash 204210581, now seen corresponding path program 1 times [2021-11-07 01:39:47,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:47,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [57751298] [2021-11-07 01:39:47,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:47,410 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:47,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:47,411 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:47,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:39:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:47,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:39:47,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:48,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:48,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:48,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:48,260 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:48,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [57751298] [2021-11-07 01:39:48,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [57751298] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:48,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:48,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:39:48,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737294849] [2021-11-07 01:39:48,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:39:48,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:48,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:39:48,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:39:48,262 INFO L87 Difference]: Start difference. First operand 973 states and 1663 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:48,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:48,622 INFO L93 Difference]: Finished difference Result 3809 states and 6514 transitions. [2021-11-07 01:39:48,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:39:48,622 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 01:39:48,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:48,640 INFO L225 Difference]: With dead ends: 3809 [2021-11-07 01:39:48,641 INFO L226 Difference]: Without dead ends: 2854 [2021-11-07 01:39:48,643 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:39:48,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-11-07 01:39:48,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 972. [2021-11-07 01:39:48,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 966 states have (on average 1.7173913043478262) internal successors, (1659), 971 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:48,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1659 transitions. [2021-11-07 01:39:48,735 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1659 transitions. Word has length 64 [2021-11-07 01:39:48,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:48,735 INFO L470 AbstractCegarLoop]: Abstraction has 972 states and 1659 transitions. [2021-11-07 01:39:48,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:48,735 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1659 transitions. [2021-11-07 01:39:48,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:39:48,737 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:48,737 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:39:48,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:48,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:48,952 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:39:48,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:48,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1107954462, now seen corresponding path program 1 times [2021-11-07 01:39:48,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:48,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [677257373] [2021-11-07 01:39:48,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:48,954 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:48,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:48,956 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:48,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:39:49,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:49,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:39:49,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:49,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:49,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:49,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:49,717 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:49,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [677257373] [2021-11-07 01:39:49,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [677257373] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:49,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:49,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:39:49,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436872802] [2021-11-07 01:39:49,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:39:49,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:49,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:39:49,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:39:49,721 INFO L87 Difference]: Start difference. First operand 972 states and 1659 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:49,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:49,840 INFO L93 Difference]: Finished difference Result 1941 states and 3315 transitions. [2021-11-07 01:39:49,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:39:49,840 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 01:39:49,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:49,847 INFO L225 Difference]: With dead ends: 1941 [2021-11-07 01:39:49,847 INFO L226 Difference]: Without dead ends: 977 [2021-11-07 01:39:49,849 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:39:49,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-11-07 01:39:49,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 972. [2021-11-07 01:39:49,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 966 states have (on average 1.7142857142857142) internal successors, (1656), 971 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:49,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1656 transitions. [2021-11-07 01:39:49,923 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1656 transitions. Word has length 65 [2021-11-07 01:39:49,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:49,925 INFO L470 AbstractCegarLoop]: Abstraction has 972 states and 1656 transitions. [2021-11-07 01:39:49,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:49,925 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1656 transitions. [2021-11-07 01:39:49,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:39:49,927 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:49,928 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:39:49,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:50,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:50,146 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:39:50,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:50,147 INFO L85 PathProgramCache]: Analyzing trace with hash 721125293, now seen corresponding path program 1 times [2021-11-07 01:39:50,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:50,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1377000750] [2021-11-07 01:39:50,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:50,147 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:50,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:50,148 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:50,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:39:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:50,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:39:50,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:50,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:50,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:50,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:50,967 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:50,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1377000750] [2021-11-07 01:39:50,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1377000750] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:50,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:50,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:39:50,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887294531] [2021-11-07 01:39:50,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:39:50,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:50,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:39:50,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:39:50,969 INFO L87 Difference]: Start difference. First operand 972 states and 1656 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:51,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:51,373 INFO L93 Difference]: Finished difference Result 3796 states and 6490 transitions. [2021-11-07 01:39:51,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:39:51,389 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 01:39:51,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:51,406 INFO L225 Difference]: With dead ends: 3796 [2021-11-07 01:39:51,406 INFO L226 Difference]: Without dead ends: 2850 [2021-11-07 01:39:51,408 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:39:51,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2850 states. [2021-11-07 01:39:51,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2850 to 972. [2021-11-07 01:39:51,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 966 states have (on average 1.7111801242236024) internal successors, (1653), 971 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:51,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1653 transitions. [2021-11-07 01:39:51,506 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1653 transitions. Word has length 66 [2021-11-07 01:39:51,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:51,507 INFO L470 AbstractCegarLoop]: Abstraction has 972 states and 1653 transitions. [2021-11-07 01:39:51,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:51,507 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1653 transitions. [2021-11-07 01:39:51,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:39:51,508 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:51,509 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:39:51,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:51,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:51,723 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:39:51,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:51,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1281417582, now seen corresponding path program 1 times [2021-11-07 01:39:51,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:51,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1858150446] [2021-11-07 01:39:51,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:51,725 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:51,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:51,726 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:51,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:39:52,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:52,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:39:52,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:52,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:52,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:52,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:52,505 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:52,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1858150446] [2021-11-07 01:39:52,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1858150446] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:52,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:52,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:39:52,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574526027] [2021-11-07 01:39:52,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:39:52,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:52,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:39:52,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:39:52,507 INFO L87 Difference]: Start difference. First operand 972 states and 1653 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:52,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:52,710 INFO L93 Difference]: Finished difference Result 2603 states and 4417 transitions. [2021-11-07 01:39:52,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:39:52,710 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:39:52,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:52,722 INFO L225 Difference]: With dead ends: 2603 [2021-11-07 01:39:52,722 INFO L226 Difference]: Without dead ends: 1918 [2021-11-07 01:39:52,725 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:39:52,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-11-07 01:39:52,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1233. [2021-11-07 01:39:52,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1227 states have (on average 1.7383863080684596) internal successors, (2133), 1232 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:52,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 2133 transitions. [2021-11-07 01:39:52,848 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 2133 transitions. Word has length 68 [2021-11-07 01:39:52,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:52,849 INFO L470 AbstractCegarLoop]: Abstraction has 1233 states and 2133 transitions. [2021-11-07 01:39:52,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:52,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 2133 transitions. [2021-11-07 01:39:52,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 01:39:52,851 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:52,852 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:39:52,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:53,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:53,067 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:39:53,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:53,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1283745793, now seen corresponding path program 1 times [2021-11-07 01:39:53,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:53,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [632630454] [2021-11-07 01:39:53,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:53,069 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:53,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:53,070 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:53,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:39:53,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:53,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:39:53,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:53,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:53,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:53,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:53,930 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:53,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [632630454] [2021-11-07 01:39:53,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [632630454] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:53,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:53,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:39:53,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34461313] [2021-11-07 01:39:53,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:39:53,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:53,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:39:53,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:39:53,932 INFO L87 Difference]: Start difference. First operand 1233 states and 2133 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:54,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:54,134 INFO L93 Difference]: Finished difference Result 3276 states and 5658 transitions. [2021-11-07 01:39:54,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:39:54,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-07 01:39:54,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:54,148 INFO L225 Difference]: With dead ends: 3276 [2021-11-07 01:39:54,148 INFO L226 Difference]: Without dead ends: 2127 [2021-11-07 01:39:54,151 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:39:54,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2021-11-07 01:39:54,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 1442. [2021-11-07 01:39:54,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1436 states have (on average 1.7520891364902507) internal successors, (2516), 1441 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:54,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 2516 transitions. [2021-11-07 01:39:54,265 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 2516 transitions. Word has length 80 [2021-11-07 01:39:54,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:54,266 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 2516 transitions. [2021-11-07 01:39:54,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:54,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 2516 transitions. [2021-11-07 01:39:54,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:39:54,269 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:54,269 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:39:54,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-07 01:39:54,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:54,487 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:39:54,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:54,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1972525566, now seen corresponding path program 1 times [2021-11-07 01:39:54,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:54,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [783905018] [2021-11-07 01:39:54,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:54,489 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:54,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:54,490 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:54,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:39:55,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:55,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:39:55,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:55,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:55,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:55,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:55,407 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:55,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [783905018] [2021-11-07 01:39:55,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [783905018] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:55,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:55,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:39:55,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843704736] [2021-11-07 01:39:55,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:39:55,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:55,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:39:55,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:39:55,409 INFO L87 Difference]: Start difference. First operand 1442 states and 2516 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:55,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:55,586 INFO L93 Difference]: Finished difference Result 3935 states and 6872 transitions. [2021-11-07 01:39:55,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:39:55,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-11-07 01:39:55,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:55,602 INFO L225 Difference]: With dead ends: 3935 [2021-11-07 01:39:55,603 INFO L226 Difference]: Without dead ends: 2585 [2021-11-07 01:39:55,607 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:39:55,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2585 states. [2021-11-07 01:39:55,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2585 to 1900. [2021-11-07 01:39:55,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1900 states, 1894 states have (on average 1.7729672650475186) internal successors, (3358), 1899 states have internal predecessors, (3358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:55,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 3358 transitions. [2021-11-07 01:39:55,780 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 3358 transitions. Word has length 81 [2021-11-07 01:39:55,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:55,781 INFO L470 AbstractCegarLoop]: Abstraction has 1900 states and 3358 transitions. [2021-11-07 01:39:55,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:55,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 3358 transitions. [2021-11-07 01:39:55,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:39:55,785 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:55,785 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:39:55,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:56,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:56,000 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:39:56,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:56,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1486889581, now seen corresponding path program 1 times [2021-11-07 01:39:56,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:56,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1005052070] [2021-11-07 01:39:56,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:56,002 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:56,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:56,002 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:56,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:39:56,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:56,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:39:56,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:56,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:56,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:56,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:56,892 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:56,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1005052070] [2021-11-07 01:39:56,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1005052070] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:56,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:56,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:39:56,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364537102] [2021-11-07 01:39:56,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:39:56,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:56,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:39:56,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:39:56,894 INFO L87 Difference]: Start difference. First operand 1900 states and 3358 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:57,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:57,124 INFO L93 Difference]: Finished difference Result 5289 states and 9367 transitions. [2021-11-07 01:39:57,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:39:57,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 01:39:57,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:57,147 INFO L225 Difference]: With dead ends: 5289 [2021-11-07 01:39:57,147 INFO L226 Difference]: Without dead ends: 3489 [2021-11-07 01:39:57,151 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:39:57,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3489 states. [2021-11-07 01:39:57,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3489 to 2804. [2021-11-07 01:39:57,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2804 states, 2798 states have (on average 1.7944960686204432) internal successors, (5021), 2803 states have internal predecessors, (5021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:57,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2804 states to 2804 states and 5021 transitions. [2021-11-07 01:39:57,397 INFO L78 Accepts]: Start accepts. Automaton has 2804 states and 5021 transitions. Word has length 82 [2021-11-07 01:39:57,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:57,398 INFO L470 AbstractCegarLoop]: Abstraction has 2804 states and 5021 transitions. [2021-11-07 01:39:57,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:57,398 INFO L276 IsEmpty]: Start isEmpty. Operand 2804 states and 5021 transitions. [2021-11-07 01:39:57,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 01:39:57,404 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:57,404 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:39:57,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:57,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:57,615 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:39:57,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:57,616 INFO L85 PathProgramCache]: Analyzing trace with hash -2077216749, now seen corresponding path program 1 times [2021-11-07 01:39:57,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:57,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1005164204] [2021-11-07 01:39:57,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:57,618 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:57,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:57,619 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:57,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:39:58,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:58,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:39:58,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:58,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:58,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:58,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:58,535 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:58,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1005164204] [2021-11-07 01:39:58,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1005164204] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:58,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:58,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:39:58,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985663276] [2021-11-07 01:39:58,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:39:58,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:58,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:39:58,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:39:58,537 INFO L87 Difference]: Start difference. First operand 2804 states and 5021 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:58,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:58,813 INFO L93 Difference]: Finished difference Result 7737 states and 13875 transitions. [2021-11-07 01:39:58,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:39:58,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 01:39:58,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:58,859 INFO L225 Difference]: With dead ends: 7737 [2021-11-07 01:39:58,859 INFO L226 Difference]: Without dead ends: 5067 [2021-11-07 01:39:58,865 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:39:58,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5067 states. [2021-11-07 01:39:59,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5067 to 4382. [2021-11-07 01:39:59,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4382 states, 4376 states have (on average 1.8103290676416819) internal successors, (7922), 4381 states have internal predecessors, (7922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:59,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4382 states to 4382 states and 7922 transitions. [2021-11-07 01:39:59,166 INFO L78 Accepts]: Start accepts. Automaton has 4382 states and 7922 transitions. Word has length 83 [2021-11-07 01:39:59,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:59,166 INFO L470 AbstractCegarLoop]: Abstraction has 4382 states and 7922 transitions. [2021-11-07 01:39:59,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:59,167 INFO L276 IsEmpty]: Start isEmpty. Operand 4382 states and 7922 transitions. [2021-11-07 01:39:59,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:39:59,176 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:59,176 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:39:59,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:59,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:59,394 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:39:59,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:59,395 INFO L85 PathProgramCache]: Analyzing trace with hash 454251394, now seen corresponding path program 1 times [2021-11-07 01:39:59,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:59,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060192185] [2021-11-07 01:39:59,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:59,396 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:59,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:59,397 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:59,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:39:59,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:00,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:00,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:00,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:00,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:00,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:00,353 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:00,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060192185] [2021-11-07 01:40:00,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1060192185] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:00,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:00,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:40:00,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717040042] [2021-11-07 01:40:00,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:40:00,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:00,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:40:00,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:40:00,355 INFO L87 Difference]: Start difference. First operand 4382 states and 7922 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:00,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:00,786 INFO L93 Difference]: Finished difference Result 12187 states and 22061 transitions. [2021-11-07 01:40:00,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:40:00,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 01:40:00,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:00,810 INFO L225 Difference]: With dead ends: 12187 [2021-11-07 01:40:00,810 INFO L226 Difference]: Without dead ends: 7973 [2021-11-07 01:40:00,818 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:40:00,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7973 states. [2021-11-07 01:40:01,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7973 to 7288. [2021-11-07 01:40:01,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7288 states, 7282 states have (on average 1.8207909914858555) internal successors, (13259), 7287 states have internal predecessors, (13259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:01,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7288 states to 7288 states and 13259 transitions. [2021-11-07 01:40:01,329 INFO L78 Accepts]: Start accepts. Automaton has 7288 states and 13259 transitions. Word has length 84 [2021-11-07 01:40:01,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:01,330 INFO L470 AbstractCegarLoop]: Abstraction has 7288 states and 13259 transitions. [2021-11-07 01:40:01,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:01,330 INFO L276 IsEmpty]: Start isEmpty. Operand 7288 states and 13259 transitions. [2021-11-07 01:40:01,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 01:40:01,342 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:01,342 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:01,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:01,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:01,557 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:40:01,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:01,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1539318562, now seen corresponding path program 1 times [2021-11-07 01:40:01,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:01,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1762585212] [2021-11-07 01:40:01,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:01,559 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:01,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:01,559 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:01,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:40:02,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:02,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:02,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:02,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:02,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:02,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:02,551 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:02,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1762585212] [2021-11-07 01:40:02,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1762585212] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:02,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:02,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:40:02,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202569027] [2021-11-07 01:40:02,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:40:02,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:02,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:40:02,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:40:02,553 INFO L87 Difference]: Start difference. First operand 7288 states and 13259 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:03,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:03,132 INFO L93 Difference]: Finished difference Result 21231 states and 38683 transitions. [2021-11-07 01:40:03,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:40:03,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-07 01:40:03,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:03,174 INFO L225 Difference]: With dead ends: 21231 [2021-11-07 01:40:03,174 INFO L226 Difference]: Without dead ends: 14119 [2021-11-07 01:40:03,186 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:40:03,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14119 states. [2021-11-07 01:40:03,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14119 to 13434. [2021-11-07 01:40:03,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13434 states, 13428 states have (on average 1.8275245755138516) internal successors, (24540), 13433 states have internal predecessors, (24540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:03,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13434 states to 13434 states and 24540 transitions. [2021-11-07 01:40:03,885 INFO L78 Accepts]: Start accepts. Automaton has 13434 states and 24540 transitions. Word has length 85 [2021-11-07 01:40:03,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:03,885 INFO L470 AbstractCegarLoop]: Abstraction has 13434 states and 24540 transitions. [2021-11-07 01:40:03,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:03,886 INFO L276 IsEmpty]: Start isEmpty. Operand 13434 states and 24540 transitions. [2021-11-07 01:40:03,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 01:40:03,905 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:03,906 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:03,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-07 01:40:04,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:04,121 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:40:04,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:04,122 INFO L85 PathProgramCache]: Analyzing trace with hash -184710158, now seen corresponding path program 1 times [2021-11-07 01:40:04,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:04,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2103650367] [2021-11-07 01:40:04,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:04,122 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:04,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:04,123 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:04,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:40:04,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:04,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:40:04,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:04,979 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:40:04,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:05,178 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:40:05,179 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:05,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2103650367] [2021-11-07 01:40:05,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2103650367] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:05,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:05,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:40:05,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025648159] [2021-11-07 01:40:05,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:40:05,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:05,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:40:05,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:40:05,181 INFO L87 Difference]: Start difference. First operand 13434 states and 24540 transitions. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:08,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:08,498 INFO L93 Difference]: Finished difference Result 33399 states and 60985 transitions. [2021-11-07 01:40:08,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:40:08,499 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-07 01:40:08,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:08,556 INFO L225 Difference]: With dead ends: 33399 [2021-11-07 01:40:08,556 INFO L226 Difference]: Without dead ends: 20262 [2021-11-07 01:40:08,576 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:40:08,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20262 states. [2021-11-07 01:40:09,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20262 to 13401. [2021-11-07 01:40:09,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13401 states, 13395 states have (on average 1.8221724524076148) internal successors, (24408), 13400 states have internal predecessors, (24408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:09,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13401 states to 13401 states and 24408 transitions. [2021-11-07 01:40:09,482 INFO L78 Accepts]: Start accepts. Automaton has 13401 states and 24408 transitions. Word has length 86 [2021-11-07 01:40:09,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:09,482 INFO L470 AbstractCegarLoop]: Abstraction has 13401 states and 24408 transitions. [2021-11-07 01:40:09,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:09,482 INFO L276 IsEmpty]: Start isEmpty. Operand 13401 states and 24408 transitions. [2021-11-07 01:40:09,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 01:40:09,496 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:09,496 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:09,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:09,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:09,712 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:40:09,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:09,712 INFO L85 PathProgramCache]: Analyzing trace with hash -294330253, now seen corresponding path program 1 times [2021-11-07 01:40:09,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:09,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1783100456] [2021-11-07 01:40:09,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:09,713 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:09,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:09,714 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:09,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:40:10,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:10,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:10,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:10,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:10,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:10,800 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:10,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1783100456] [2021-11-07 01:40:10,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1783100456] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:10,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:10,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:40:10,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261364088] [2021-11-07 01:40:10,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:40:10,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:10,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:40:10,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:40:10,802 INFO L87 Difference]: Start difference. First operand 13401 states and 24408 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:11,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:11,714 INFO L93 Difference]: Finished difference Result 39402 states and 71837 transitions. [2021-11-07 01:40:11,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:40:11,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-07 01:40:11,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:11,780 INFO L225 Difference]: With dead ends: 39402 [2021-11-07 01:40:11,780 INFO L226 Difference]: Without dead ends: 26184 [2021-11-07 01:40:11,800 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:40:11,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26184 states. [2021-11-07 01:40:13,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26184 to 25499. [2021-11-07 01:40:13,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25499 states, 25493 states have (on average 1.8248538814576551) internal successors, (46521), 25498 states have internal predecessors, (46521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:13,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25499 states to 25499 states and 46521 transitions. [2021-11-07 01:40:13,215 INFO L78 Accepts]: Start accepts. Automaton has 25499 states and 46521 transitions. Word has length 86 [2021-11-07 01:40:13,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:13,216 INFO L470 AbstractCegarLoop]: Abstraction has 25499 states and 46521 transitions. [2021-11-07 01:40:13,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:13,216 INFO L276 IsEmpty]: Start isEmpty. Operand 25499 states and 46521 transitions. [2021-11-07 01:40:13,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 01:40:13,235 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:13,236 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:13,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:13,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:13,449 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:40:13,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:13,450 INFO L85 PathProgramCache]: Analyzing trace with hash -638122573, now seen corresponding path program 1 times [2021-11-07 01:40:13,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:13,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725201336] [2021-11-07 01:40:13,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:13,451 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:13,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:13,451 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:13,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:40:14,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:14,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:14,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:14,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:14,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:14,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:14,553 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:14,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725201336] [2021-11-07 01:40:14,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [725201336] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:14,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:14,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:40:14,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332659416] [2021-11-07 01:40:14,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:40:14,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:14,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:40:14,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:40:14,555 INFO L87 Difference]: Start difference. First operand 25499 states and 46521 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:16,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:16,337 INFO L93 Difference]: Finished difference Result 70335 states and 127912 transitions. [2021-11-07 01:40:16,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:40:16,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 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 87 [2021-11-07 01:40:16,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:16,422 INFO L225 Difference]: With dead ends: 70335 [2021-11-07 01:40:16,422 INFO L226 Difference]: Without dead ends: 45066 [2021-11-07 01:40:16,451 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:40:16,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45066 states. [2021-11-07 01:40:18,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45066 to 44381. [2021-11-07 01:40:18,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44381 states, 44375 states have (on average 1.8142197183098592) internal successors, (80506), 44380 states have internal predecessors, (80506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:18,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44381 states to 44381 states and 80506 transitions. [2021-11-07 01:40:18,899 INFO L78 Accepts]: Start accepts. Automaton has 44381 states and 80506 transitions. Word has length 87 [2021-11-07 01:40:18,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:18,899 INFO L470 AbstractCegarLoop]: Abstraction has 44381 states and 80506 transitions. [2021-11-07 01:40:18,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:18,899 INFO L276 IsEmpty]: Start isEmpty. Operand 44381 states and 80506 transitions. [2021-11-07 01:40:18,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 01:40:18,916 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:18,916 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:18,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 01:40:19,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:19,117 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:40:19,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:19,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1308014572, now seen corresponding path program 1 times [2021-11-07 01:40:19,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:19,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2132039046] [2021-11-07 01:40:19,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:19,119 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:19,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:19,125 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:19,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:40:19,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:19,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:40:19,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:40:20,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:20,434 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:40:20,434 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:20,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2132039046] [2021-11-07 01:40:20,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2132039046] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:20,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:20,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:40:20,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520874396] [2021-11-07 01:40:20,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:40:20,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:20,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:40:20,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:40:20,436 INFO L87 Difference]: Start difference. First operand 44381 states and 80506 transitions. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:27,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:27,643 INFO L93 Difference]: Finished difference Result 172792 states and 313325 transitions. [2021-11-07 01:40:27,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:40:27,644 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-07 01:40:27,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:27,882 INFO L225 Difference]: With dead ends: 172792 [2021-11-07 01:40:27,882 INFO L226 Difference]: Without dead ends: 128707 [2021-11-07 01:40:28,119 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:40:28,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128707 states. [2021-11-07 01:40:31,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128707 to 44123. [2021-11-07 01:40:31,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44123 states, 44117 states have (on average 1.8014370877439536) internal successors, (79474), 44122 states have internal predecessors, (79474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:31,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44123 states to 44123 states and 79474 transitions. [2021-11-07 01:40:31,452 INFO L78 Accepts]: Start accepts. Automaton has 44123 states and 79474 transitions. Word has length 88 [2021-11-07 01:40:31,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:31,452 INFO L470 AbstractCegarLoop]: Abstraction has 44123 states and 79474 transitions. [2021-11-07 01:40:31,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:31,452 INFO L276 IsEmpty]: Start isEmpty. Operand 44123 states and 79474 transitions. [2021-11-07 01:40:31,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 01:40:31,468 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:31,468 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:31,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:31,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:31,669 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:40:31,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:31,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1975127282, now seen corresponding path program 1 times [2021-11-07 01:40:31,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:31,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2061536987] [2021-11-07 01:40:31,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:31,670 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:31,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:31,671 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:31,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:40:32,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:32,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:32,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:32,663 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:32,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:32,846 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:32,846 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:32,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2061536987] [2021-11-07 01:40:32,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2061536987] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:32,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:32,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:40:32,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889788933] [2021-11-07 01:40:32,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:40:32,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:32,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:40:32,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:40:32,849 INFO L87 Difference]: Start difference. First operand 44123 states and 79474 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 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) [2021-11-07 01:40:34,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:34,796 INFO L93 Difference]: Finished difference Result 88629 states and 159580 transitions. [2021-11-07 01:40:34,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:40:34,796 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 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 88 [2021-11-07 01:40:34,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:34,861 INFO L225 Difference]: With dead ends: 88629 [2021-11-07 01:40:34,861 INFO L226 Difference]: Without dead ends: 44808 [2021-11-07 01:40:34,883 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:40:34,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44808 states. [2021-11-07 01:40:37,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44808 to 44123. [2021-11-07 01:40:37,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44123 states, 44117 states have (on average 1.7985357118571073) internal successors, (79346), 44122 states have internal predecessors, (79346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:37,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44123 states to 44123 states and 79346 transitions. [2021-11-07 01:40:37,126 INFO L78 Accepts]: Start accepts. Automaton has 44123 states and 79346 transitions. Word has length 88 [2021-11-07 01:40:37,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:37,126 INFO L470 AbstractCegarLoop]: Abstraction has 44123 states and 79346 transitions. [2021-11-07 01:40:37,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 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) [2021-11-07 01:40:37,126 INFO L276 IsEmpty]: Start isEmpty. Operand 44123 states and 79346 transitions. [2021-11-07 01:40:37,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 01:40:37,139 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:37,139 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:37,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:37,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:37,340 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:40:37,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:37,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1160536127, now seen corresponding path program 1 times [2021-11-07 01:40:37,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:37,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431888122] [2021-11-07 01:40:37,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:37,341 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:37,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:37,342 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:37,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6eb55992-e1fa-416b-ac3c-58f28c7de575/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:40:38,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:38,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:40:38,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:38,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:38,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:38,573 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:38,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431888122] [2021-11-07 01:40:38,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1431888122] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:38,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:38,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:40:38,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691505242] [2021-11-07 01:40:38,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:40:38,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:38,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:40:38,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:40:38,576 INFO L87 Difference]: Start difference. First operand 44123 states and 79346 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)