./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec7_product29.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_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/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_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec7_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/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_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/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 2586c6a9c5639b30d1f21b288976c8c026e2c567887902cc846265d5507c0a62 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:45:41,413 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:45:41,416 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:45:41,483 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:45:41,483 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:45:41,488 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:45:41,490 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:45:41,494 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:45:41,497 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:45:41,502 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:45:41,504 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:45:41,505 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:45:41,506 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:45:41,508 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:45:41,511 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:45:41,515 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:45:41,517 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:45:41,518 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:45:41,521 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:45:41,528 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:45:41,530 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:45:41,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:45:41,535 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:45:41,536 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:45:41,540 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:45:41,541 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:45:41,541 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:45:41,544 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:45:41,544 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:45:41,546 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:45:41,546 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:45:41,547 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:45:41,549 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:45:41,551 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:45:41,552 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:45:41,553 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:45:41,554 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:45:41,554 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:45:41,555 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:45:41,556 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:45:41,557 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:45:41,558 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:45:41,602 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:45:41,603 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:45:41,604 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:45:41,605 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:45:41,605 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:45:41,605 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:45:41,605 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:45:41,605 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:45:41,612 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:45:41,612 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:45:41,613 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:45:41,613 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:45:41,614 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:45:41,614 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:45:41,614 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:45:41,615 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:45:41,615 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:45:41,616 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:45:41,616 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:45:41,616 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:45:41,616 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:45:41,617 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:45:41,617 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:45:41,617 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:45:41,617 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:45:41,617 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:45:41,618 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:45:41,618 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:45:41,618 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:45:41,620 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:45:41,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:45:41,620 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:45:41,621 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:45:41,621 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:45:41,621 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:45:41,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:45:41,621 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:45:41,622 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:45:41,622 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:45:41,622 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_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2586c6a9c5639b30d1f21b288976c8c026e2c567887902cc846265d5507c0a62 [2021-11-07 01:45:41,921 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:45:41,981 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:45:41,984 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:45:41,985 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:45:41,986 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:45:41,987 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec7_product29.cil.c [2021-11-07 01:45:42,082 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/data/76b1d2429/cc4ae26c29594dc98babbea44eeb01f2/FLAG326b4dfbf [2021-11-07 01:45:42,846 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:45:42,846 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/sv-benchmarks/c/product-lines/email_spec7_product29.cil.c [2021-11-07 01:45:42,871 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/data/76b1d2429/cc4ae26c29594dc98babbea44eeb01f2/FLAG326b4dfbf [2021-11-07 01:45:43,021 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/data/76b1d2429/cc4ae26c29594dc98babbea44eeb01f2 [2021-11-07 01:45:43,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:45:43,026 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:45:43,028 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:45:43,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:45:43,032 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:45:43,033 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:45:43" (1/1) ... [2021-11-07 01:45:43,035 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@89b4ada and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:43, skipping insertion in model container [2021-11-07 01:45:43,035 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:45:43" (1/1) ... [2021-11-07 01:45:43,043 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:45:43,158 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:45:43,523 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_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/sv-benchmarks/c/product-lines/email_spec7_product29.cil.c[16949,16962] [2021-11-07 01:45:43,843 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:45:43,856 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 01:45:43,857 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@18678ef4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:43, skipping insertion in model container [2021-11-07 01:45:43,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:45:43,858 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:45:43,860 INFO L168 Benchmark]: Toolchain (without parser) took 832.22 ms. Allocated memory was 83.9 MB in the beginning and 115.3 MB in the end (delta: 31.5 MB). Free memory was 47.7 MB in the beginning and 77.4 MB in the end (delta: -29.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:45:43,861 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 83.9 MB. Free memory was 54.8 MB in the beginning and 54.8 MB in the end (delta: 31.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:45:43,862 INFO L168 Benchmark]: CACSL2BoogieTranslator took 829.27 ms. Allocated memory was 83.9 MB in the beginning and 115.3 MB in the end (delta: 31.5 MB). Free memory was 47.4 MB in the beginning and 77.4 MB in the end (delta: -30.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:45:43,864 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 83.9 MB. Free memory was 54.8 MB in the beginning and 54.8 MB in the end (delta: 31.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 829.27 ms. Allocated memory was 83.9 MB in the beginning and 115.3 MB in the end (delta: 31.5 MB). Free memory was 47.4 MB in the beginning and 77.4 MB in the end (delta: -30.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 397]: 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_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/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_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec7_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/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_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/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 2586c6a9c5639b30d1f21b288976c8c026e2c567887902cc846265d5507c0a62 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:45:46,350 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:45:46,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:45:46,412 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:45:46,413 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:45:46,415 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:45:46,417 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:45:46,420 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:45:46,422 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:45:46,424 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:45:46,425 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:45:46,427 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:45:46,428 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:45:46,429 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:45:46,431 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:45:46,433 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:45:46,434 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:45:46,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:45:46,438 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:45:46,442 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:45:46,444 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:45:46,446 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:45:46,448 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:45:46,449 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:45:46,454 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:45:46,454 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:45:46,455 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:45:46,456 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:45:46,457 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:45:46,459 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:45:46,459 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:45:46,460 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:45:46,462 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:45:46,463 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:45:46,464 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:45:46,465 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:45:46,466 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:45:46,466 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:45:46,467 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:45:46,468 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:45:46,469 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:45:46,470 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:45:46,517 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:45:46,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:45:46,521 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:45:46,522 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:45:46,522 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:45:46,522 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:45:46,522 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:45:46,523 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:45:46,523 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:45:46,525 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:45:46,526 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:45:46,526 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:45:46,527 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:45:46,527 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:45:46,527 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:45:46,528 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:45:46,528 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:45:46,528 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:45:46,528 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:45:46,529 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:45:46,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:45:46,529 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:45:46,529 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:45:46,530 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:45:46,530 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:45:46,530 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:45:46,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:45:46,531 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:45:46,531 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:45:46,531 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:45:46,532 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:45:46,532 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:45:46,532 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:45:46,547 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:45:46,547 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:45:46,547 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_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2586c6a9c5639b30d1f21b288976c8c026e2c567887902cc846265d5507c0a62 [2021-11-07 01:45:46,932 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:45:46,961 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:45:46,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:45:46,966 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:45:46,967 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:45:46,969 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec7_product29.cil.c [2021-11-07 01:45:47,042 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/data/7c0520608/14cd758560074b17affa6231ce9738cc/FLAGd5650e636 [2021-11-07 01:45:47,852 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:45:47,852 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/sv-benchmarks/c/product-lines/email_spec7_product29.cil.c [2021-11-07 01:45:47,910 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/data/7c0520608/14cd758560074b17affa6231ce9738cc/FLAGd5650e636 [2021-11-07 01:45:47,999 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/data/7c0520608/14cd758560074b17affa6231ce9738cc [2021-11-07 01:45:48,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:45:48,007 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:45:48,009 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:45:48,010 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:45:48,014 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:45:48,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:45:48" (1/1) ... [2021-11-07 01:45:48,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5223b45e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:48, skipping insertion in model container [2021-11-07 01:45:48,017 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:45:48" (1/1) ... [2021-11-07 01:45:48,026 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:45:48,122 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:45:48,704 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_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/sv-benchmarks/c/product-lines/email_spec7_product29.cil.c[16949,16962] [2021-11-07 01:45:49,021 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:45:49,036 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:45:49,067 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:45:49,124 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_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/sv-benchmarks/c/product-lines/email_spec7_product29.cil.c[16949,16962] [2021-11-07 01:45:49,213 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:45:49,220 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:45:49,260 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_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/sv-benchmarks/c/product-lines/email_spec7_product29.cil.c[16949,16962] [2021-11-07 01:45:49,313 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:45:49,381 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:45:49,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:49 WrapperNode [2021-11-07 01:45:49,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:45:49,382 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:45:49,382 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:45:49,382 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:45:49,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:49" (1/1) ... [2021-11-07 01:45:49,432 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:49" (1/1) ... [2021-11-07 01:45:49,636 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:45:49,637 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:45:49,637 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:45:49,637 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:45:49,647 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:49" (1/1) ... [2021-11-07 01:45:49,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:49" (1/1) ... [2021-11-07 01:45:49,667 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:49" (1/1) ... [2021-11-07 01:45:49,668 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:49" (1/1) ... [2021-11-07 01:45:49,744 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:49" (1/1) ... [2021-11-07 01:45:49,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:49" (1/1) ... [2021-11-07 01:45:49,842 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:49" (1/1) ... [2021-11-07 01:45:49,871 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:45:49,872 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:45:49,873 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:45:49,873 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:45:49,874 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:49" (1/1) ... [2021-11-07 01:45:49,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:45:49,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:45:49,915 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:45:49,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:45:49,972 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:45:49,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:45:49,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:45:49,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:45:49,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:45:56,072 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:45:56,078 INFO L299 CfgBuilder]: Removed 617 assume(true) statements. [2021-11-07 01:45:56,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:45:56 BoogieIcfgContainer [2021-11-07 01:45:56,085 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:45:56,089 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:45:56,091 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:45:56,094 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:45:56,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:45:48" (1/3) ... [2021-11-07 01:45:56,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3760da50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:45:56, skipping insertion in model container [2021-11-07 01:45:56,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:49" (2/3) ... [2021-11-07 01:45:56,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3760da50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:45:56, skipping insertion in model container [2021-11-07 01:45:56,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:45:56" (3/3) ... [2021-11-07 01:45:56,097 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec7_product29.cil.c [2021-11-07 01:45:56,100 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:45:56,101 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:45:56,172 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:45:56,179 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 01:45:56,180 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:45:56,269 INFO L276 IsEmpty]: Start isEmpty. Operand has 992 states, 985 states have (on average 1.7553299492385788) internal successors, (1729), 991 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states 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 01:45:56,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:45:56,303 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:56,304 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] [2021-11-07 01:45:56,305 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 01:45:56,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:56,313 INFO L85 PathProgramCache]: Analyzing trace with hash 44105088, now seen corresponding path program 1 times [2021-11-07 01:45:56,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:56,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [488236118] [2021-11-07 01:45:56,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:56,334 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:56,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:56,342 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:56,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:45:56,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:56,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:45:56,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:57,242 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 01:45:57,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:57,442 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 01:45:57,443 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:57,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [488236118] [2021-11-07 01:45:57,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [488236118] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:57,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:57,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:45:57,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542443374] [2021-11-07 01:45:57,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:45:57,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:57,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:45:57,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:45:57,479 INFO L87 Difference]: Start difference. First operand has 992 states, 985 states have (on average 1.7553299492385788) internal successors, (1729), 991 states have internal predecessors, (1729), 0 states have call successors, (0), 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 27.5) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 01:45:57,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:57,633 INFO L93 Difference]: Finished difference Result 1703 states and 2942 transitions. [2021-11-07 01:45:57,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:45:57,634 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-11-07 01:45:57,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:57,655 INFO L225 Difference]: With dead ends: 1703 [2021-11-07 01:45:57,656 INFO L226 Difference]: Without dead ends: 914 [2021-11-07 01:45:57,662 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 108 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 01:45:57,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2021-11-07 01:45:57,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 914. [2021-11-07 01:45:57,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 908 states have (on average 1.748898678414097) internal successors, (1588), 913 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states 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 01:45:57,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1588 transitions. [2021-11-07 01:45:57,762 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1588 transitions. Word has length 55 [2021-11-07 01:45:57,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:57,763 INFO L470 AbstractCegarLoop]: Abstraction has 914 states and 1588 transitions. [2021-11-07 01:45:57,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 01:45:57,763 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1588 transitions. [2021-11-07 01:45:57,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 01:45:57,773 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:57,773 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] [2021-11-07 01:45:57,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:57,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:57,974 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 01:45:57,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:57,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1140123981, now seen corresponding path program 1 times [2021-11-07 01:45:57,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:57,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1081824235] [2021-11-07 01:45:57,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:57,978 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:57,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:57,988 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:57,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:45:58,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:58,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:45:58,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:58,694 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 01:45:58,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:58,921 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 01:45:58,922 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:58,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1081824235] [2021-11-07 01:45:58,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1081824235] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:58,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:58,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:45:58,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63132963] [2021-11-07 01:45:58,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:45:58,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:58,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:45:58,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:45:58,932 INFO L87 Difference]: Start difference. First operand 914 states and 1588 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states 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 01:45:59,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:59,136 INFO L93 Difference]: Finished difference Result 2712 states and 4716 transitions. [2021-11-07 01:45:59,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:45:59,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-07 01:45:59,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:59,155 INFO L225 Difference]: With dead ends: 2712 [2021-11-07 01:45:59,155 INFO L226 Difference]: Without dead ends: 1813 [2021-11-07 01:45:59,159 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 108 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 01:45:59,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1813 states. [2021-11-07 01:45:59,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1813 to 913. [2021-11-07 01:45:59,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 907 states have (on average 1.7453142227122382) internal successors, (1583), 912 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states 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 01:45:59,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1583 transitions. [2021-11-07 01:45:59,251 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1583 transitions. Word has length 56 [2021-11-07 01:45:59,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:59,253 INFO L470 AbstractCegarLoop]: Abstraction has 913 states and 1583 transitions. [2021-11-07 01:45:59,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states 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 01:45:59,254 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1583 transitions. [2021-11-07 01:45:59,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:45:59,265 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:59,266 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] [2021-11-07 01:45:59,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:59,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:59,480 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 01:45:59,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:59,481 INFO L85 PathProgramCache]: Analyzing trace with hash 780858509, now seen corresponding path program 1 times [2021-11-07 01:45:59,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:59,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1254573986] [2021-11-07 01:45:59,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:59,483 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:59,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:59,486 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:59,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:45:59,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:59,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:46:00,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:00,205 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 01:46:00,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:00,436 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 01:46:00,436 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:00,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1254573986] [2021-11-07 01:46:00,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1254573986] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:00,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:00,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:46:00,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541086821] [2021-11-07 01:46:00,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:46:00,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:00,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:46:00,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:46:00,441 INFO L87 Difference]: Start difference. First operand 913 states and 1583 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 01:46:00,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:00,886 INFO L93 Difference]: Finished difference Result 3569 states and 6194 transitions. [2021-11-07 01:46:00,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:46:00,887 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 01:46:00,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:00,906 INFO L225 Difference]: With dead ends: 3569 [2021-11-07 01:46:00,906 INFO L226 Difference]: Without dead ends: 2674 [2021-11-07 01:46:00,908 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 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 01:46:00,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2674 states. [2021-11-07 01:46:00,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2674 to 912. [2021-11-07 01:46:00,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 906 states have (on average 1.7428256070640176) internal successors, (1579), 911 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states 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 01:46:01,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1579 transitions. [2021-11-07 01:46:01,002 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1579 transitions. Word has length 58 [2021-11-07 01:46:01,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:01,002 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 1579 transitions. [2021-11-07 01:46:01,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 01:46:01,004 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1579 transitions. [2021-11-07 01:46:01,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:46:01,006 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:01,007 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] [2021-11-07 01:46:01,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:01,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:01,222 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 01:46:01,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:01,222 INFO L85 PathProgramCache]: Analyzing trace with hash 778872218, now seen corresponding path program 1 times [2021-11-07 01:46:01,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:01,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [756732851] [2021-11-07 01:46:01,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:01,224 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:01,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:01,227 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:01,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:46:01,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:01,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:46:01,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:01,954 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 01:46:01,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:02,159 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 01:46:02,159 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:02,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [756732851] [2021-11-07 01:46:02,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [756732851] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:02,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:02,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:46:02,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918262782] [2021-11-07 01:46:02,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:46:02,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:02,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:46:02,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:46:02,162 INFO L87 Difference]: Start difference. First operand 912 states and 1579 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:02,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:02,284 INFO L93 Difference]: Finished difference Result 1821 states and 3155 transitions. [2021-11-07 01:46:02,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:46:02,285 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-07 01:46:02,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:02,291 INFO L225 Difference]: With dead ends: 1821 [2021-11-07 01:46:02,292 INFO L226 Difference]: Without dead ends: 917 [2021-11-07 01:46:02,294 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 114 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 01:46:02,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2021-11-07 01:46:02,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 912. [2021-11-07 01:46:02,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 906 states have (on average 1.739514348785872) internal successors, (1576), 911 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states 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 01:46:02,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1576 transitions. [2021-11-07 01:46:02,379 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1576 transitions. Word has length 59 [2021-11-07 01:46:02,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:02,379 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 1576 transitions. [2021-11-07 01:46:02,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:02,380 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1576 transitions. [2021-11-07 01:46:02,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:46:02,382 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:02,382 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] [2021-11-07 01:46:02,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:02,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:02,592 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 01:46:02,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:02,593 INFO L85 PathProgramCache]: Analyzing trace with hash -2047286107, now seen corresponding path program 1 times [2021-11-07 01:46:02,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:02,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [699016384] [2021-11-07 01:46:02,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:02,594 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:02,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:02,596 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:02,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:46:03,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:03,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:46:03,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:03,305 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 01:46:03,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:03,497 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 01:46:03,497 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:03,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [699016384] [2021-11-07 01:46:03,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [699016384] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:03,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:03,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:46:03,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616841682] [2021-11-07 01:46:03,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:46:03,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:03,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:46:03,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:46:03,500 INFO L87 Difference]: Start difference. First operand 912 states and 1576 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:03,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:03,941 INFO L93 Difference]: Finished difference Result 3556 states and 6170 transitions. [2021-11-07 01:46:03,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:46:03,942 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 01:46:03,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:03,962 INFO L225 Difference]: With dead ends: 3556 [2021-11-07 01:46:03,963 INFO L226 Difference]: Without dead ends: 2670 [2021-11-07 01:46:03,965 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 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 01:46:03,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2670 states. [2021-11-07 01:46:04,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2670 to 912. [2021-11-07 01:46:04,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 906 states have (on average 1.7362030905077264) internal successors, (1573), 911 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states 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 01:46:04,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1573 transitions. [2021-11-07 01:46:04,079 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1573 transitions. Word has length 60 [2021-11-07 01:46:04,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:04,080 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 1573 transitions. [2021-11-07 01:46:04,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:04,080 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1573 transitions. [2021-11-07 01:46:04,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:46:04,082 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:04,082 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 01:46:04,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:04,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:04,296 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 01:46:04,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:04,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1038275402, now seen corresponding path program 1 times [2021-11-07 01:46:04,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:04,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [903572317] [2021-11-07 01:46:04,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:04,298 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:04,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:04,304 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:04,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:46:04,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:04,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:46:04,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:04,974 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 01:46:04,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:05,146 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 01:46:05,146 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:05,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [903572317] [2021-11-07 01:46:05,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [903572317] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:05,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:05,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:46:05,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686832444] [2021-11-07 01:46:05,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:46:05,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:05,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:46:05,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:46:05,149 INFO L87 Difference]: Start difference. First operand 912 states and 1573 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states 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 01:46:05,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:05,362 INFO L93 Difference]: Finished difference Result 2431 states and 4191 transitions. [2021-11-07 01:46:05,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:46:05,363 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 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 01:46:05,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:05,377 INFO L225 Difference]: With dead ends: 2431 [2021-11-07 01:46:05,377 INFO L226 Difference]: Without dead ends: 1798 [2021-11-07 01:46:05,380 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 01:46:05,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2021-11-07 01:46:05,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1165. [2021-11-07 01:46:05,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1159 states have (on average 1.7592752372735116) internal successors, (2039), 1164 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states 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 01:46:05,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 2039 transitions. [2021-11-07 01:46:05,503 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 2039 transitions. Word has length 62 [2021-11-07 01:46:05,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:05,504 INFO L470 AbstractCegarLoop]: Abstraction has 1165 states and 2039 transitions. [2021-11-07 01:46:05,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states 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 01:46:05,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 2039 transitions. [2021-11-07 01:46:05,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:46:05,507 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:05,507 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] [2021-11-07 01:46:05,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:05,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:05,729 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 01:46:05,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:05,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1163346169, now seen corresponding path program 1 times [2021-11-07 01:46:05,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:05,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1210196950] [2021-11-07 01:46:05,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:05,732 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:05,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:05,733 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:05,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:46:06,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:06,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:46:06,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:06,554 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 01:46:06,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:06,749 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 01:46:06,750 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:06,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1210196950] [2021-11-07 01:46:06,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1210196950] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:06,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:06,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:46:06,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469039495] [2021-11-07 01:46:06,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:46:06,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:06,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:46:06,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:46:06,752 INFO L87 Difference]: Start difference. First operand 1165 states and 2039 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:06,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:06,926 INFO L93 Difference]: Finished difference Result 3080 states and 5390 transitions. [2021-11-07 01:46:06,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:46:06,927 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 01:46:06,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:06,941 INFO L225 Difference]: With dead ends: 3080 [2021-11-07 01:46:06,941 INFO L226 Difference]: Without dead ends: 1999 [2021-11-07 01:46:06,944 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 145 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 01:46:06,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1999 states. [2021-11-07 01:46:07,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1999 to 1366. [2021-11-07 01:46:07,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1360 states have (on average 1.7705882352941176) internal successors, (2408), 1365 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states 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 01:46:07,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 2408 transitions. [2021-11-07 01:46:07,109 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 2408 transitions. Word has length 74 [2021-11-07 01:46:07,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:07,111 INFO L470 AbstractCegarLoop]: Abstraction has 1366 states and 2408 transitions. [2021-11-07 01:46:07,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:07,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 2408 transitions. [2021-11-07 01:46:07,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:46:07,114 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:07,115 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] [2021-11-07 01:46:07,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:07,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:07,330 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 01:46:07,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:07,330 INFO L85 PathProgramCache]: Analyzing trace with hash 42161082, now seen corresponding path program 1 times [2021-11-07 01:46:07,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:07,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1936533109] [2021-11-07 01:46:07,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:07,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:07,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:07,332 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:07,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:46:07,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:07,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:46:07,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:08,124 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 01:46:08,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:08,342 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 01:46:08,342 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:08,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1936533109] [2021-11-07 01:46:08,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1936533109] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:08,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:08,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:46:08,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305193715] [2021-11-07 01:46:08,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:46:08,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:08,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:46:08,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:46:08,345 INFO L87 Difference]: Start difference. First operand 1366 states and 2408 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:08,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:08,568 INFO L93 Difference]: Finished difference Result 3727 states and 6583 transitions. [2021-11-07 01:46:08,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:46:08,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:46:08,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:08,587 INFO L225 Difference]: With dead ends: 3727 [2021-11-07 01:46:08,587 INFO L226 Difference]: Without dead ends: 2449 [2021-11-07 01:46:08,593 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 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 01:46:08,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2449 states. [2021-11-07 01:46:08,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2449 to 1816. [2021-11-07 01:46:08,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1810 states have (on average 1.7878453038674034) internal successors, (3236), 1815 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states 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 01:46:08,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 3236 transitions. [2021-11-07 01:46:08,777 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 3236 transitions. Word has length 75 [2021-11-07 01:46:08,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:08,777 INFO L470 AbstractCegarLoop]: Abstraction has 1816 states and 3236 transitions. [2021-11-07 01:46:08,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:08,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 3236 transitions. [2021-11-07 01:46:08,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:46:08,789 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:08,790 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:08,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:09,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:09,009 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 01:46:09,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:09,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1031749142, now seen corresponding path program 1 times [2021-11-07 01:46:09,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:09,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776841915] [2021-11-07 01:46:09,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:09,011 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:09,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:09,012 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:09,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:46:09,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:09,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:46:09,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:09,844 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:09,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:10,032 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:10,032 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:10,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776841915] [2021-11-07 01:46:10,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776841915] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:10,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:10,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:46:10,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145286528] [2021-11-07 01:46:10,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:46:10,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:10,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:46:10,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:46:10,035 INFO L87 Difference]: Start difference. First operand 1816 states and 3236 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 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 01:46:10,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:10,331 INFO L93 Difference]: Finished difference Result 3980 states and 7046 transitions. [2021-11-07 01:46:10,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:46:10,331 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 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 76 [2021-11-07 01:46:10,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:10,349 INFO L225 Difference]: With dead ends: 3980 [2021-11-07 01:46:10,349 INFO L226 Difference]: Without dead ends: 2449 [2021-11-07 01:46:10,353 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 148 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 01:46:10,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2449 states. [2021-11-07 01:46:10,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2449 to 1816. [2021-11-07 01:46:10,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1810 states have (on average 1.7867403314917127) internal successors, (3234), 1815 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states 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 01:46:10,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 3234 transitions. [2021-11-07 01:46:10,528 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 3234 transitions. Word has length 76 [2021-11-07 01:46:10,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:10,529 INFO L470 AbstractCegarLoop]: Abstraction has 1816 states and 3234 transitions. [2021-11-07 01:46:10,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 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 01:46:10,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 3234 transitions. [2021-11-07 01:46:10,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:46:10,534 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:10,534 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] [2021-11-07 01:46:10,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:10,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:10,752 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 01:46:10,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:10,753 INFO L85 PathProgramCache]: Analyzing trace with hash -250164213, now seen corresponding path program 1 times [2021-11-07 01:46:10,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:10,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [561195159] [2021-11-07 01:46:10,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:10,754 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:10,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:10,755 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:10,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:46:11,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:11,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:46:11,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:11,595 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 01:46:11,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:11,799 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 01:46:11,799 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:11,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [561195159] [2021-11-07 01:46:11,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [561195159] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:11,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:11,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:46:11,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145101881] [2021-11-07 01:46:11,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:46:11,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:11,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:46:11,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:46:11,802 INFO L87 Difference]: Start difference. First operand 1816 states and 3234 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:12,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:12,077 INFO L93 Difference]: Finished difference Result 5049 states and 9016 transitions. [2021-11-07 01:46:12,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:46:12,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 01:46:12,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:12,102 INFO L225 Difference]: With dead ends: 5049 [2021-11-07 01:46:12,102 INFO L226 Difference]: Without dead ends: 3329 [2021-11-07 01:46:12,105 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 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 01:46:12,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3329 states. [2021-11-07 01:46:12,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3329 to 2696. [2021-11-07 01:46:12,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2696 states, 2690 states have (on average 1.804089219330855) internal successors, (4853), 2695 states have internal predecessors, (4853), 0 states have call successors, (0), 0 states 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 01:46:12,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2696 states to 2696 states and 4853 transitions. [2021-11-07 01:46:12,328 INFO L78 Accepts]: Start accepts. Automaton has 2696 states and 4853 transitions. Word has length 76 [2021-11-07 01:46:12,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:12,328 INFO L470 AbstractCegarLoop]: Abstraction has 2696 states and 4853 transitions. [2021-11-07 01:46:12,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:12,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2696 states and 4853 transitions. [2021-11-07 01:46:12,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:46:12,336 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:12,336 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] [2021-11-07 01:46:12,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:12,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:12,552 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 01:46:12,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:12,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1020909640, now seen corresponding path program 1 times [2021-11-07 01:46:12,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:12,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [824030222] [2021-11-07 01:46:12,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:12,554 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:12,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:12,555 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:12,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:46:13,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:13,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:46:13,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:13,380 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 01:46:13,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:13,559 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 01:46:13,559 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:13,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [824030222] [2021-11-07 01:46:13,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [824030222] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:13,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:13,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:46:13,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487581607] [2021-11-07 01:46:13,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:46:13,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:13,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:46:13,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:46:13,561 INFO L87 Difference]: Start difference. First operand 2696 states and 4853 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:13,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:13,955 INFO L93 Difference]: Finished difference Result 7425 states and 13392 transitions. [2021-11-07 01:46:13,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:46:13,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 01:46:13,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:13,991 INFO L225 Difference]: With dead ends: 7425 [2021-11-07 01:46:13,992 INFO L226 Difference]: Without dead ends: 4859 [2021-11-07 01:46:13,997 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 151 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 01:46:14,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4859 states. [2021-11-07 01:46:14,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4859 to 4226. [2021-11-07 01:46:14,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4226 states, 4220 states have (on average 1.8165876777251184) internal successors, (7666), 4225 states have internal predecessors, (7666), 0 states have call successors, (0), 0 states 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 01:46:14,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4226 states to 4226 states and 7666 transitions. [2021-11-07 01:46:14,378 INFO L78 Accepts]: Start accepts. Automaton has 4226 states and 7666 transitions. Word has length 77 [2021-11-07 01:46:14,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:14,380 INFO L470 AbstractCegarLoop]: Abstraction has 4226 states and 7666 transitions. [2021-11-07 01:46:14,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:14,380 INFO L276 IsEmpty]: Start isEmpty. Operand 4226 states and 7666 transitions. [2021-11-07 01:46:14,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:46:14,389 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:14,390 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] [2021-11-07 01:46:14,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:14,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:14,606 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 01:46:14,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:14,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1270987046, now seen corresponding path program 1 times [2021-11-07 01:46:14,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:14,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1284735429] [2021-11-07 01:46:14,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:14,607 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:14,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:14,609 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:14,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:46:15,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:15,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:46:15,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:15,503 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 01:46:15,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:15,693 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 01:46:15,693 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:15,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1284735429] [2021-11-07 01:46:15,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1284735429] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:15,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:15,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:46:15,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055866051] [2021-11-07 01:46:15,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:46:15,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:15,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:46:15,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:46:15,695 INFO L87 Difference]: Start difference. First operand 4226 states and 7666 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 01:46:16,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:16,237 INFO L93 Difference]: Finished difference Result 11731 states and 21314 transitions. [2021-11-07 01:46:16,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:46:16,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-11-07 01:46:16,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:16,288 INFO L225 Difference]: With dead ends: 11731 [2021-11-07 01:46:16,288 INFO L226 Difference]: Without dead ends: 7669 [2021-11-07 01:46:16,295 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 153 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 01:46:16,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7669 states. [2021-11-07 01:46:16,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7669 to 7036. [2021-11-07 01:46:16,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7036 states, 7030 states have (on average 1.8246088193456615) internal successors, (12827), 7035 states have internal predecessors, (12827), 0 states have call successors, (0), 0 states 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 01:46:16,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7036 states to 7036 states and 12827 transitions. [2021-11-07 01:46:16,906 INFO L78 Accepts]: Start accepts. Automaton has 7036 states and 12827 transitions. Word has length 78 [2021-11-07 01:46:16,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:16,907 INFO L470 AbstractCegarLoop]: Abstraction has 7036 states and 12827 transitions. [2021-11-07 01:46:16,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 01:46:16,908 INFO L276 IsEmpty]: Start isEmpty. Operand 7036 states and 12827 transitions. [2021-11-07 01:46:16,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:46:16,920 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:16,920 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] [2021-11-07 01:46:16,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:17,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:17,139 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 01:46:17,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:17,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1188050922, now seen corresponding path program 1 times [2021-11-07 01:46:17,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:17,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1853248125] [2021-11-07 01:46:17,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:17,141 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:17,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:17,142 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:17,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:46:17,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:17,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:46:17,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:18,111 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 01:46:18,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:18,359 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 01:46:18,360 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:18,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1853248125] [2021-11-07 01:46:18,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1853248125] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:18,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:18,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:46:18,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253143152] [2021-11-07 01:46:18,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:46:18,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:18,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:46:18,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:46:18,362 INFO L87 Difference]: Start difference. First operand 7036 states and 12827 transitions. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states 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 01:46:21,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:21,867 INFO L93 Difference]: Finished difference Result 26667 states and 48664 transitions. [2021-11-07 01:46:21,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:46:21,868 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 01:46:21,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:21,935 INFO L225 Difference]: With dead ends: 26667 [2021-11-07 01:46:21,936 INFO L226 Difference]: Without dead ends: 19914 [2021-11-07 01:46:21,948 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 152 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 01:46:21,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19914 states. [2021-11-07 01:46:22,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19914 to 6986. [2021-11-07 01:46:22,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6986 states, 6980 states have (on average 1.809025787965616) internal successors, (12627), 6985 states have internal predecessors, (12627), 0 states have call successors, (0), 0 states 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 01:46:22,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6986 states to 6986 states and 12627 transitions. [2021-11-07 01:46:22,698 INFO L78 Accepts]: Start accepts. Automaton has 6986 states and 12627 transitions. Word has length 79 [2021-11-07 01:46:22,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:22,698 INFO L470 AbstractCegarLoop]: Abstraction has 6986 states and 12627 transitions. [2021-11-07 01:46:22,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states 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 01:46:22,699 INFO L276 IsEmpty]: Start isEmpty. Operand 6986 states and 12627 transitions. [2021-11-07 01:46:22,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:46:22,709 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:22,709 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] [2021-11-07 01:46:22,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 01:46:22,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:22,926 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 01:46:22,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:22,927 INFO L85 PathProgramCache]: Analyzing trace with hash -185540505, now seen corresponding path program 1 times [2021-11-07 01:46:22,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:22,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [404046138] [2021-11-07 01:46:22,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:22,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:22,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:22,982 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:22,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:46:23,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:23,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:46:23,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:23,872 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 01:46:23,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:24,070 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 01:46:24,070 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:24,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [404046138] [2021-11-07 01:46:24,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [404046138] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:24,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:24,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:46:24,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771711162] [2021-11-07 01:46:24,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:46:24,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:24,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:46:24,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:46:24,072 INFO L87 Difference]: Start difference. First operand 6986 states and 12627 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:24,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:24,564 INFO L93 Difference]: Finished difference Result 20472 states and 37051 transitions. [2021-11-07 01:46:24,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:46:24,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 01:46:24,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:24,600 INFO L225 Difference]: With dead ends: 20472 [2021-11-07 01:46:24,601 INFO L226 Difference]: Without dead ends: 13653 [2021-11-07 01:46:24,613 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 155 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 01:46:24,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13653 states. [2021-11-07 01:46:25,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13653 to 13020. [2021-11-07 01:46:25,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13020 states, 13014 states have (on average 1.8125096050407254) internal successors, (23588), 13019 states have internal predecessors, (23588), 0 states have call successors, (0), 0 states 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 01:46:25,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13020 states to 13020 states and 23588 transitions. [2021-11-07 01:46:25,400 INFO L78 Accepts]: Start accepts. Automaton has 13020 states and 23588 transitions. Word has length 79 [2021-11-07 01:46:25,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:25,400 INFO L470 AbstractCegarLoop]: Abstraction has 13020 states and 23588 transitions. [2021-11-07 01:46:25,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:25,401 INFO L276 IsEmpty]: Start isEmpty. Operand 13020 states and 23588 transitions. [2021-11-07 01:46:25,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 01:46:25,414 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:25,415 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] [2021-11-07 01:46:25,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:25,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:25,631 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 01:46:25,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:25,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1507233979, now seen corresponding path program 1 times [2021-11-07 01:46:25,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:25,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [719329214] [2021-11-07 01:46:25,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:25,633 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:25,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:25,635 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:25,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:46:26,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:26,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:46:26,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:26,618 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:26,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:26,916 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:26,916 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:26,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [719329214] [2021-11-07 01:46:26,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [719329214] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:26,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [447218553] [2021-11-07 01:46:26,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:26,917 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:26,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:46:26,922 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:46:26,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:46:27,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:27,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:46:27,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:28,166 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:46:28,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:46:28,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [447218553] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:28,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:46:28,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 01:46:28,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129374222] [2021-11-07 01:46:28,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:46:28,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:28,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:46:28,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:46:28,530 INFO L87 Difference]: Start difference. First operand 13020 states and 23588 transitions. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states 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 01:46:38,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:38,664 INFO L93 Difference]: Finished difference Result 85320 states and 154153 transitions. [2021-11-07 01:46:38,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 01:46:38,664 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 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 01:46:38,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:38,829 INFO L225 Difference]: With dead ends: 85320 [2021-11-07 01:46:38,830 INFO L226 Difference]: Without dead ends: 84705 [2021-11-07 01:46:38,852 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 01:46:38,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84705 states. [2021-11-07 01:46:41,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84705 to 25754. [2021-11-07 01:46:41,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25754 states, 25748 states have (on average 1.8136165915799285) internal successors, (46697), 25753 states have internal predecessors, (46697), 0 states have call successors, (0), 0 states 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 01:46:41,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25754 states to 25754 states and 46697 transitions. [2021-11-07 01:46:41,164 INFO L78 Accepts]: Start accepts. Automaton has 25754 states and 46697 transitions. Word has length 80 [2021-11-07 01:46:41,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:41,165 INFO L470 AbstractCegarLoop]: Abstraction has 25754 states and 46697 transitions. [2021-11-07 01:46:41,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states 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 01:46:41,166 INFO L276 IsEmpty]: Start isEmpty. Operand 25754 states and 46697 transitions. [2021-11-07 01:46:41,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:46:41,211 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:41,211 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] [2021-11-07 01:46:41,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:41,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 01:46:41,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:41,617 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 01:46:41,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:41,617 INFO L85 PathProgramCache]: Analyzing trace with hash -953564264, now seen corresponding path program 1 times [2021-11-07 01:46:41,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:41,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [408061854] [2021-11-07 01:46:41,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:41,618 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:41,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:41,620 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:41,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:46:42,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:42,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:46:42,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:42,685 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:42,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:42,953 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:42,953 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:42,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [408061854] [2021-11-07 01:46:42,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [408061854] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:42,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1329374372] [2021-11-07 01:46:42,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:42,953 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:42,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:46:42,954 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:46:42,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:46:43,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:43,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:46:44,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:44,323 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:46:44,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:44,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:46:44,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1329374372] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:44,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:46:44,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 01:46:44,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041426846] [2021-11-07 01:46:44,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:46:44,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:44,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:46:44,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:46:44,599 INFO L87 Difference]: Start difference. First operand 25754 states and 46697 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:48,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:48,057 INFO L93 Difference]: Finished difference Result 27469 states and 49602 transitions. [2021-11-07 01:46:48,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:46:48,057 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-07 01:46:48,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:48,091 INFO L225 Difference]: With dead ends: 27469 [2021-11-07 01:46:48,092 INFO L226 Difference]: Without dead ends: 26497 [2021-11-07 01:46:48,099 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:46:48,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26497 states. [2021-11-07 01:46:49,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26497 to 25748. [2021-11-07 01:46:49,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25748 states, 25742 states have (on average 1.8135343019190429) internal successors, (46684), 25747 states have internal predecessors, (46684), 0 states have call successors, (0), 0 states 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 01:46:49,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25748 states to 25748 states and 46684 transitions. [2021-11-07 01:46:49,736 INFO L78 Accepts]: Start accepts. Automaton has 25748 states and 46684 transitions. Word has length 81 [2021-11-07 01:46:49,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:49,737 INFO L470 AbstractCegarLoop]: Abstraction has 25748 states and 46684 transitions. [2021-11-07 01:46:49,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:49,737 INFO L276 IsEmpty]: Start isEmpty. Operand 25748 states and 46684 transitions. [2021-11-07 01:46:49,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:46:49,786 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:49,787 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] [2021-11-07 01:46:49,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:50,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-07 01:46:50,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:50,193 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 01:46:50,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:50,193 INFO L85 PathProgramCache]: Analyzing trace with hash 376883944, now seen corresponding path program 1 times [2021-11-07 01:46:50,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:50,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [54044816] [2021-11-07 01:46:50,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:50,194 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:50,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:50,195 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:50,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:46:51,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:51,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:46:51,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:51,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:46:51,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:51,575 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:46:51,575 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:51,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [54044816] [2021-11-07 01:46:51,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [54044816] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:51,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:51,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:46:51,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182250940] [2021-11-07 01:46:51,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:46:51,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:51,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:46:51,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:46:51,577 INFO L87 Difference]: Start difference. First operand 25748 states and 46684 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:53,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:53,099 INFO L93 Difference]: Finished difference Result 50732 states and 92192 transitions. [2021-11-07 01:46:53,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:46:53,100 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-07 01:46:53,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:53,142 INFO L225 Difference]: With dead ends: 50732 [2021-11-07 01:46:53,142 INFO L226 Difference]: Without dead ends: 25270 [2021-11-07 01:46:53,172 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:46:53,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25270 states. [2021-11-07 01:46:54,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25270 to 13018. [2021-11-07 01:46:54,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13018 states, 13012 states have (on average 1.8120965262834308) internal successors, (23579), 13017 states have internal predecessors, (23579), 0 states have call successors, (0), 0 states 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 01:46:54,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13018 states to 13018 states and 23579 transitions. [2021-11-07 01:46:54,322 INFO L78 Accepts]: Start accepts. Automaton has 13018 states and 23579 transitions. Word has length 81 [2021-11-07 01:46:54,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:54,322 INFO L470 AbstractCegarLoop]: Abstraction has 13018 states and 23579 transitions. [2021-11-07 01:46:54,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:54,322 INFO L276 IsEmpty]: Start isEmpty. Operand 13018 states and 23579 transitions. [2021-11-07 01:46:54,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 01:46:54,333 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:54,333 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] [2021-11-07 01:46:54,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:54,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:54,553 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 01:46:54,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:54,553 INFO L85 PathProgramCache]: Analyzing trace with hash 65175914, now seen corresponding path program 1 times [2021-11-07 01:46:54,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:54,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [717189429] [2021-11-07 01:46:54,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:54,554 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:54,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:54,556 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:54,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:46:55,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:55,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:46:55,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:55,664 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:55,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:55,923 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:55,923 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:55,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [717189429] [2021-11-07 01:46:55,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [717189429] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:55,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1779000596] [2021-11-07 01:46:55,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:55,924 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:55,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:46:55,925 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:46:55,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 01:46:57,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:57,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:46:57,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:57,844 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:46:57,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:58,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:46:58,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1779000596] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:58,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:46:58,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:46:58,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849906213] [2021-11-07 01:46:58,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:46:58,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:58,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:46:58,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:46:58,290 INFO L87 Difference]: Start difference. First operand 13018 states and 23579 transitions. Second operand has 16 states, 16 states have (on average 8.4375) internal successors, (135), 15 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:15,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:15,144 INFO L93 Difference]: Finished difference Result 30897 states and 55156 transitions. [2021-11-07 01:47:15,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 01:47:15,145 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.4375) internal successors, (135), 15 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-07 01:47:15,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:15,184 INFO L225 Difference]: With dead ends: 30897 [2021-11-07 01:47:15,184 INFO L226 Difference]: Without dead ends: 30330 [2021-11-07 01:47:15,190 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 01:47:15,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30330 states. [2021-11-07 01:47:16,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30330 to 25720. [2021-11-07 01:47:16,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25720 states, 25714 states have (on average 1.813447927199191) internal successors, (46631), 25719 states have internal predecessors, (46631), 0 states have call successors, (0), 0 states 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 01:47:16,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25720 states to 25720 states and 46631 transitions. [2021-11-07 01:47:16,698 INFO L78 Accepts]: Start accepts. Automaton has 25720 states and 46631 transitions. Word has length 83 [2021-11-07 01:47:16,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:16,699 INFO L470 AbstractCegarLoop]: Abstraction has 25720 states and 46631 transitions. [2021-11-07 01:47:16,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.4375) internal successors, (135), 15 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:16,699 INFO L276 IsEmpty]: Start isEmpty. Operand 25720 states and 46631 transitions. [2021-11-07 01:47:16,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:47:16,719 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:16,720 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] [2021-11-07 01:47:16,748 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-07 01:47:16,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:17,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:47:17,136 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:47:17,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:17,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1235545486, now seen corresponding path program 1 times [2021-11-07 01:47:17,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:17,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [226807986] [2021-11-07 01:47:17,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:17,138 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:17,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:17,138 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:17,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:47:18,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:18,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:47:18,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:18,320 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:18,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:18,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:18,579 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:18,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [226807986] [2021-11-07 01:47:18,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [226807986] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:47:18,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [700388464] [2021-11-07 01:47:18,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:18,580 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:47:18,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:47:18,582 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:47:18,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 01:47:19,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:19,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:47:19,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:20,115 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:47:20,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:20,311 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:47:20,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [700388464] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:20,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:47:20,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 01:47:20,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386811911] [2021-11-07 01:47:20,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:47:20,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:20,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:47:20,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:47:20,313 INFO L87 Difference]: Start difference. First operand 25720 states and 46631 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 01:47:21,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:21,836 INFO L93 Difference]: Finished difference Result 26879 states and 48588 transitions. [2021-11-07 01:47:21,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:47:21,837 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 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 01:47:21,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:21,875 INFO L225 Difference]: With dead ends: 26879 [2021-11-07 01:47:21,875 INFO L226 Difference]: Without dead ends: 26251 [2021-11-07 01:47:21,881 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:47:21,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26251 states. [2021-11-07 01:47:23,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26251 to 25719. [2021-11-07 01:47:23,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25719 states, 25713 states have (on average 1.8133628903667405) internal successors, (46627), 25718 states have internal predecessors, (46627), 0 states have call successors, (0), 0 states 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 01:47:23,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25719 states to 25719 states and 46627 transitions. [2021-11-07 01:47:23,391 INFO L78 Accepts]: Start accepts. Automaton has 25719 states and 46627 transitions. Word has length 84 [2021-11-07 01:47:23,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:23,391 INFO L470 AbstractCegarLoop]: Abstraction has 25719 states and 46627 transitions. [2021-11-07 01:47:23,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 01:47:23,392 INFO L276 IsEmpty]: Start isEmpty. Operand 25719 states and 46627 transitions. [2021-11-07 01:47:23,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:47:23,404 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:23,405 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] [2021-11-07 01:47:23,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:23,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:23,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:47:23,806 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:47:23,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:23,807 INFO L85 PathProgramCache]: Analyzing trace with hash -2077950368, now seen corresponding path program 1 times [2021-11-07 01:47:23,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:23,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672345646] [2021-11-07 01:47:23,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:23,808 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:23,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:23,809 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:23,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:47:25,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:25,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:47:25,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:25,263 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:25,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:25,509 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:25,510 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:25,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672345646] [2021-11-07 01:47:25,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1672345646] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:47:25,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [164729850] [2021-11-07 01:47:25,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:25,510 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:47:25,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:47:25,511 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:47:25,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 01:47:27,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:27,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:47:27,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:27,438 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:47:27,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:27,710 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:47:27,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [164729850] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:27,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:47:27,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 14 [2021-11-07 01:47:27,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444897047] [2021-11-07 01:47:27,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:47:27,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:27,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:47:27,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:47:27,712 INFO L87 Difference]: Start difference. First operand 25719 states and 46627 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 01:47:31,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:31,786 INFO L93 Difference]: Finished difference Result 27225 states and 49156 transitions. [2021-11-07 01:47:31,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:47:31,787 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 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 01:47:31,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:31,826 INFO L225 Difference]: With dead ends: 27225 [2021-11-07 01:47:31,826 INFO L226 Difference]: Without dead ends: 26183 [2021-11-07 01:47:31,834 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:47:31,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26183 states. [2021-11-07 01:47:33,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26183 to 25683. [2021-11-07 01:47:33,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25683 states, 25677 states have (on average 1.8127507107528138) internal successors, (46546), 25682 states have internal predecessors, (46546), 0 states have call successors, (0), 0 states 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 01:47:33,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25683 states to 25683 states and 46546 transitions. [2021-11-07 01:47:33,506 INFO L78 Accepts]: Start accepts. Automaton has 25683 states and 46546 transitions. Word has length 84 [2021-11-07 01:47:33,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:33,506 INFO L470 AbstractCegarLoop]: Abstraction has 25683 states and 46546 transitions. [2021-11-07 01:47:33,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states 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 01:47:33,506 INFO L276 IsEmpty]: Start isEmpty. Operand 25683 states and 46546 transitions. [2021-11-07 01:47:33,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:47:33,518 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:33,518 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] [2021-11-07 01:47:33,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:33,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:33,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:33,928 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:47:33,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:33,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1564257592, now seen corresponding path program 1 times [2021-11-07 01:47:33,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:33,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1880097262] [2021-11-07 01:47:33,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:33,929 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:33,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:33,930 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:33,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 01:47:35,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:35,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:47:35,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:35,431 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:35,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:35,743 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:35,743 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:35,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1880097262] [2021-11-07 01:47:35,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1880097262] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:47:35,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1726496886] [2021-11-07 01:47:35,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:35,744 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:47:35,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:47:35,748 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:47:35,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 01:47:37,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:37,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:47:37,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:38,005 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:47:38,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:38,531 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:47:38,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1726496886] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:38,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:47:38,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:47:38,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509430674] [2021-11-07 01:47:38,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:47:38,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:38,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:47:38,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:47:38,533 INFO L87 Difference]: Start difference. First operand 25683 states and 46546 transitions. Second operand has 16 states, 16 states have (on average 8.5625) internal successors, (137), 15 states have internal predecessors, (137), 0 states have call successors, (0), 0 states 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 01:47:58,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:58,610 INFO L93 Difference]: Finished difference Result 58454 states and 104785 transitions. [2021-11-07 01:47:58,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 01:47:58,611 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.5625) internal successors, (137), 15 states have internal predecessors, (137), 0 states have call successors, (0), 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 01:47:58,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:58,695 INFO L225 Difference]: With dead ends: 58454 [2021-11-07 01:47:58,695 INFO L226 Difference]: Without dead ends: 57448 [2021-11-07 01:47:58,706 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=391, Invalid=1249, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 01:47:58,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57448 states. [2021-11-07 01:48:01,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57448 to 50977. [2021-11-07 01:48:01,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50977 states, 50971 states have (on average 1.813442938141296) internal successors, (92433), 50976 states have internal predecessors, (92433), 0 states have call successors, (0), 0 states 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 01:48:02,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50977 states to 50977 states and 92433 transitions. [2021-11-07 01:48:02,186 INFO L78 Accepts]: Start accepts. Automaton has 50977 states and 92433 transitions. Word has length 84 [2021-11-07 01:48:02,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:02,187 INFO L470 AbstractCegarLoop]: Abstraction has 50977 states and 92433 transitions. [2021-11-07 01:48:02,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.5625) internal successors, (137), 15 states have internal predecessors, (137), 0 states have call successors, (0), 0 states 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 01:48:02,187 INFO L276 IsEmpty]: Start isEmpty. Operand 50977 states and 92433 transitions. [2021-11-07 01:48:02,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:48:02,208 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:02,208 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] [2021-11-07 01:48:02,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-07 01:48:02,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:02,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:48:02,631 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:48:02,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:02,631 INFO L85 PathProgramCache]: Analyzing trace with hash 746609142, now seen corresponding path program 1 times [2021-11-07 01:48:02,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:02,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1023202238] [2021-11-07 01:48:02,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:02,633 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:02,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:02,634 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:02,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 01:48:03,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:03,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:48:03,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:04,213 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:04,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:04,485 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:04,485 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:04,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1023202238] [2021-11-07 01:48:04,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1023202238] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:48:04,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [107467092] [2021-11-07 01:48:04,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:04,486 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:48:04,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:48:04,486 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:48:04,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-07 01:48:06,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:06,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 01:48:06,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:06,714 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:48:06,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:07,294 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:48:07,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [107467092] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:07,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:48:07,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 20 [2021-11-07 01:48:07,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019659160] [2021-11-07 01:48:07,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 01:48:07,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:07,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 01:48:07,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:48:07,296 INFO L87 Difference]: Start difference. First operand 50977 states and 92433 transitions. Second operand has 14 states, 14 states have (on average 9.928571428571429) internal successors, (139), 14 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 01:48:19,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:19,794 INFO L93 Difference]: Finished difference Result 66420 states and 118420 transitions. [2021-11-07 01:48:19,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 01:48:19,797 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 9.928571428571429) internal successors, (139), 14 states have internal predecessors, (139), 0 states have call successors, (0), 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 01:48:19,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:19,896 INFO L225 Difference]: With dead ends: 66420 [2021-11-07 01:48:19,897 INFO L226 Difference]: Without dead ends: 64678 [2021-11-07 01:48:19,909 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=606, Invalid=1944, Unknown=0, NotChecked=0, Total=2550 [2021-11-07 01:48:19,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64678 states. [2021-11-07 01:48:23,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64678 to 51483. [2021-11-07 01:48:23,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51483 states, 51477 states have (on average 1.811138955261573) internal successors, (93232), 51482 states have internal predecessors, (93232), 0 states have call successors, (0), 0 states 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 01:48:23,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51483 states to 51483 states and 93232 transitions. [2021-11-07 01:48:23,612 INFO L78 Accepts]: Start accepts. Automaton has 51483 states and 93232 transitions. Word has length 84 [2021-11-07 01:48:23,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:23,612 INFO L470 AbstractCegarLoop]: Abstraction has 51483 states and 93232 transitions. [2021-11-07 01:48:23,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.928571428571429) internal successors, (139), 14 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 01:48:23,612 INFO L276 IsEmpty]: Start isEmpty. Operand 51483 states and 93232 transitions. [2021-11-07 01:48:23,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 01:48:23,651 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:23,651 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] [2021-11-07 01:48:23,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:23,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:24,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:48:24,070 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:48:24,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:24,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1273482186, now seen corresponding path program 1 times [2021-11-07 01:48:24,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:24,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [110414757] [2021-11-07 01:48:24,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:24,072 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:24,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:24,073 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:24,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 01:48:25,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:25,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:48:25,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:25,728 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:25,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:25,985 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:25,985 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:25,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [110414757] [2021-11-07 01:48:25,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [110414757] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:48:25,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1482241409] [2021-11-07 01:48:25,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:25,985 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:48:25,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:48:25,986 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:48:25,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-07 01:48:27,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:27,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:48:27,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:28,272 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:48:28,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:28,612 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:48:28,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1482241409] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:28,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:48:28,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-07 01:48:28,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455281056] [2021-11-07 01:48:28,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:48:28,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:28,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:48:28,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:48:28,615 INFO L87 Difference]: Start difference. First operand 51483 states and 93232 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:34,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:34,698 INFO L93 Difference]: Finished difference Result 63793 states and 113770 transitions. [2021-11-07 01:48:34,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:48:34,699 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-07 01:48:34,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:34,800 INFO L225 Difference]: With dead ends: 63793 [2021-11-07 01:48:34,800 INFO L226 Difference]: Without dead ends: 61839 [2021-11-07 01:48:34,812 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:48:34,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61839 states. [2021-11-07 01:48:38,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61839 to 53953. [2021-11-07 01:48:38,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53953 states, 53947 states have (on average 1.8028249949024042) internal successors, (97257), 53952 states have internal predecessors, (97257), 0 states have call successors, (0), 0 states 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 01:48:39,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53953 states to 53953 states and 97257 transitions. [2021-11-07 01:48:39,029 INFO L78 Accepts]: Start accepts. Automaton has 53953 states and 97257 transitions. Word has length 85 [2021-11-07 01:48:39,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:39,029 INFO L470 AbstractCegarLoop]: Abstraction has 53953 states and 97257 transitions. [2021-11-07 01:48:39,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:39,029 INFO L276 IsEmpty]: Start isEmpty. Operand 53953 states and 97257 transitions. [2021-11-07 01:48:39,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 01:48:39,052 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:39,052 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] [2021-11-07 01:48:39,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:39,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:39,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:48:39,453 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:48:39,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:39,454 INFO L85 PathProgramCache]: Analyzing trace with hash 825027442, now seen corresponding path program 1 times [2021-11-07 01:48:39,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:39,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1791174312] [2021-11-07 01:48:39,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:39,455 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:39,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:39,456 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:39,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-07 01:48:40,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:40,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:48:40,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:41,192 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:41,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:41,504 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:41,504 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:41,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1791174312] [2021-11-07 01:48:41,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1791174312] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:48:41,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [916214133] [2021-11-07 01:48:41,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:41,505 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:48:41,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:48:41,506 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:48:41,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a7b317b-dbd8-4876-9b58-e026eb1ccb86/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-07 01:48:43,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:43,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:48:43,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:43,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:48:43,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:44,041 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:48:44,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [916214133] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:44,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:48:44,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [5, 5] total 15 [2021-11-07 01:48:44,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275959567] [2021-11-07 01:48:44,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:48:44,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:44,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:48:44,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:48:44,044 INFO L87 Difference]: Start difference. First operand 53953 states and 97257 transitions. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 01:48:50,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:50,985 INFO L93 Difference]: Finished difference Result 67229 states and 119651 transitions. [2021-11-07 01:48:50,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:48:50,986 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 01:48:50,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:51,184 INFO L225 Difference]: With dead ends: 67229 [2021-11-07 01:48:51,184 INFO L226 Difference]: Without dead ends: 67203 [2021-11-07 01:48:51,195 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:48:51,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67203 states.