./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec4_product17.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_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/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_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec4_product17.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/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_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/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 922981a69371fe79bea26dd37077d7dd588a5af1cfad53b27080b4988960097d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:54:00,859 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:54:00,863 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:54:00,919 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:54:00,920 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:54:00,925 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:54:00,927 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:54:00,931 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:54:00,934 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:54:00,941 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:54:00,942 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:54:00,944 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:54:00,945 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:54:00,947 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:54:00,950 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:54:00,956 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:54:00,958 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:54:00,960 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:54:00,962 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:54:00,973 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:54:00,975 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:54:00,977 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:54:00,980 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:54:00,982 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:54:00,991 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:54:00,992 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:54:00,992 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:54:00,994 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:54:00,995 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:54:00,997 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:54:00,998 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:54:00,999 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:54:01,001 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:54:01,002 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:54:01,004 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:54:01,004 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:54:01,005 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:54:01,006 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:54:01,006 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:54:01,007 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:54:01,008 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:54:01,009 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:54:01,055 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:54:01,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:54:01,057 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:54:01,057 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:54:01,057 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:54:01,058 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:54:01,058 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:54:01,058 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:54:01,065 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:54:01,065 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:54:01,066 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:54:01,066 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:54:01,067 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:54:01,067 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:54:01,067 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:54:01,068 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:54:01,068 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:54:01,069 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:54:01,069 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:54:01,069 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:54:01,069 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:54:01,070 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:54:01,070 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:54:01,070 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:54:01,070 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:54:01,071 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:54:01,071 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:54:01,071 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:54:01,071 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:54:01,073 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:54:01,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:54:01,074 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:54:01,074 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:54:01,074 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:54:01,075 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:54:01,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:54:01,075 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:54:01,075 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:54:01,076 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:54:01,076 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_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 922981a69371fe79bea26dd37077d7dd588a5af1cfad53b27080b4988960097d [2021-11-07 01:54:01,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:54:01,396 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:54:01,399 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:54:01,400 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:54:01,401 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:54:01,402 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec4_product17.cil.c [2021-11-07 01:54:01,461 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/data/23cb8a9cf/c989fda0bd4e41fa8abd515abe931523/FLAGcd98dccb7 [2021-11-07 01:54:02,108 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:54:02,109 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/sv-benchmarks/c/product-lines/email_spec4_product17.cil.c [2021-11-07 01:54:02,160 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/data/23cb8a9cf/c989fda0bd4e41fa8abd515abe931523/FLAGcd98dccb7 [2021-11-07 01:54:02,321 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/data/23cb8a9cf/c989fda0bd4e41fa8abd515abe931523 [2021-11-07 01:54:02,324 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:54:02,325 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:54:02,327 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:54:02,327 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:54:02,333 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:54:02,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:54:02" (1/1) ... [2021-11-07 01:54:02,336 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77b3888b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:02, skipping insertion in model container [2021-11-07 01:54:02,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:54:02" (1/1) ... [2021-11-07 01:54:02,343 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:54:02,448 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:54:03,179 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_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/sv-benchmarks/c/product-lines/email_spec4_product17.cil.c[45969,45982] [2021-11-07 01:54:03,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:54:03,294 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 01:54:03,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6f16df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:03, skipping insertion in model container [2021-11-07 01:54:03,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:54:03,296 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:54:03,298 INFO L168 Benchmark]: Toolchain (without parser) took 971.66 ms. Allocated memory was 86.0 MB in the beginning and 123.7 MB in the end (delta: 37.7 MB). Free memory was 63.9 MB in the beginning and 86.4 MB in the end (delta: -22.5 MB). Peak memory consumption was 15.0 MB. Max. memory is 16.1 GB. [2021-11-07 01:54:03,299 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 86.0 MB. Free memory was 64.8 MB in the beginning and 64.7 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:54:03,300 INFO L168 Benchmark]: CACSL2BoogieTranslator took 969.14 ms. Allocated memory was 86.0 MB in the beginning and 123.7 MB in the end (delta: 37.7 MB). Free memory was 63.9 MB in the beginning and 86.4 MB in the end (delta: -22.5 MB). Peak memory consumption was 15.0 MB. Max. memory is 16.1 GB. [2021-11-07 01:54:03,302 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 86.0 MB. Free memory was 64.8 MB in the beginning and 64.7 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 969.14 ms. Allocated memory was 86.0 MB in the beginning and 123.7 MB in the end (delta: 37.7 MB). Free memory was 63.9 MB in the beginning and 86.4 MB in the end (delta: -22.5 MB). Peak memory consumption was 15.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2580]: 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_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/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_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec4_product17.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/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_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/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 922981a69371fe79bea26dd37077d7dd588a5af1cfad53b27080b4988960097d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:54:05,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:54:05,651 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:54:05,700 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:54:05,701 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:54:05,702 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:54:05,704 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:54:05,707 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:54:05,709 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:54:05,711 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:54:05,712 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:54:05,713 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:54:05,714 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:54:05,715 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:54:05,717 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:54:05,719 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:54:05,720 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:54:05,721 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:54:05,723 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:54:05,726 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:54:05,728 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:54:05,732 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:54:05,734 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:54:05,735 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:54:05,739 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:54:05,740 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:54:05,740 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:54:05,741 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:54:05,742 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:54:05,744 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:54:05,744 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:54:05,745 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:54:05,746 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:54:05,747 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:54:05,749 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:54:05,749 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:54:05,750 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:54:05,751 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:54:05,751 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:54:05,752 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:54:05,753 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:54:05,754 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:54:05,781 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:54:05,781 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:54:05,782 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:54:05,782 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:54:05,783 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:54:05,783 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:54:05,783 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:54:05,783 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:54:05,783 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:54:05,784 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:54:05,785 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:54:05,785 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:54:05,785 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:54:05,785 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:54:05,785 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:54:05,786 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:54:05,786 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:54:05,786 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:54:05,786 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:54:05,787 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:54:05,787 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:54:05,787 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:54:05,787 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:54:05,788 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:54:05,788 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:54:05,788 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:54:05,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:54:05,789 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:54:05,789 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:54:05,789 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:54:05,789 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:54:05,789 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:54:05,790 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:54:05,790 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:54:05,790 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:54:05,790 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_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 922981a69371fe79bea26dd37077d7dd588a5af1cfad53b27080b4988960097d [2021-11-07 01:54:06,134 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:54:06,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:54:06,176 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:54:06,177 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:54:06,178 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:54:06,179 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec4_product17.cil.c [2021-11-07 01:54:06,240 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/data/0bacc47d9/b3109b90aa37443d978a0b447e2e2a81/FLAG5a11a94a8 [2021-11-07 01:54:06,898 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:54:06,899 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/sv-benchmarks/c/product-lines/email_spec4_product17.cil.c [2021-11-07 01:54:06,920 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/data/0bacc47d9/b3109b90aa37443d978a0b447e2e2a81/FLAG5a11a94a8 [2021-11-07 01:54:07,079 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/data/0bacc47d9/b3109b90aa37443d978a0b447e2e2a81 [2021-11-07 01:54:07,082 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:54:07,084 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:54:07,085 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:54:07,085 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:54:07,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:54:07,094 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:54:07" (1/1) ... [2021-11-07 01:54:07,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@142710e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:07, skipping insertion in model container [2021-11-07 01:54:07,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:54:07" (1/1) ... [2021-11-07 01:54:07,103 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:54:07,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:54:07,790 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_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/sv-benchmarks/c/product-lines/email_spec4_product17.cil.c[45969,45982] [2021-11-07 01:54:07,892 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:54:07,914 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:54:07,934 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:54:08,071 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_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/sv-benchmarks/c/product-lines/email_spec4_product17.cil.c[45969,45982] [2021-11-07 01:54:08,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:54:08,113 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:54:08,219 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_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/sv-benchmarks/c/product-lines/email_spec4_product17.cil.c[45969,45982] [2021-11-07 01:54:08,250 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:54:08,322 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:54:08,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:08 WrapperNode [2021-11-07 01:54:08,323 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:54:08,325 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:54:08,325 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:54:08,325 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:54:08,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:08" (1/1) ... [2021-11-07 01:54:08,390 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:08" (1/1) ... [2021-11-07 01:54:08,542 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:54:08,543 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:54:08,544 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:54:08,544 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:54:08,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:08" (1/1) ... [2021-11-07 01:54:08,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:08" (1/1) ... [2021-11-07 01:54:08,579 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:08" (1/1) ... [2021-11-07 01:54:08,579 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:08" (1/1) ... [2021-11-07 01:54:08,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:08" (1/1) ... [2021-11-07 01:54:08,713 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:08" (1/1) ... [2021-11-07 01:54:08,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:08" (1/1) ... [2021-11-07 01:54:08,759 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:54:08,761 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:54:08,762 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:54:08,763 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:54:08,768 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:08" (1/1) ... [2021-11-07 01:54:08,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:54:08,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:54:08,804 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:54:08,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:54:08,867 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:54:08,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:54:08,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:54:08,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:54:08,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:54:14,025 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:54:14,026 INFO L299 CfgBuilder]: Removed 437 assume(true) statements. [2021-11-07 01:54:14,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:54:14 BoogieIcfgContainer [2021-11-07 01:54:14,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:54:14,035 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:54:14,035 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:54:14,038 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:54:14,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:54:07" (1/3) ... [2021-11-07 01:54:14,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@148413de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:54:14, skipping insertion in model container [2021-11-07 01:54:14,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:54:08" (2/3) ... [2021-11-07 01:54:14,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@148413de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:54:14, skipping insertion in model container [2021-11-07 01:54:14,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:54:14" (3/3) ... [2021-11-07 01:54:14,042 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec4_product17.cil.c [2021-11-07 01:54:14,049 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:54:14,049 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:54:14,130 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:54:14,142 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 01:54:14,143 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:54:14,199 INFO L276 IsEmpty]: Start isEmpty. Operand has 722 states, 715 states have (on average 1.7720279720279721) internal successors, (1267), 721 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states 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 01:54:14,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 01:54:14,232 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:14,233 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:54:14,234 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 01:54:14,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:14,242 INFO L85 PathProgramCache]: Analyzing trace with hash 24135593, now seen corresponding path program 1 times [2021-11-07 01:54:14,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:14,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [273117773] [2021-11-07 01:54:14,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:14,260 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:14,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:14,268 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:14,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:54:14,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:14,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:54:14,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:14,925 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 01:54:14,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:15,083 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 01:54:15,084 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:15,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [273117773] [2021-11-07 01:54:15,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [273117773] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:15,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:15,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:54:15,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787837809] [2021-11-07 01:54:15,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:54:15,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:15,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:54:15,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:54:15,135 INFO L87 Difference]: Start difference. First operand has 722 states, 715 states have (on average 1.7720279720279721) internal successors, (1267), 721 states have internal predecessors, (1267), 0 states have call successors, (0), 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 21.5) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 01:54:15,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:15,220 INFO L93 Difference]: Finished difference Result 1163 states and 2018 transitions. [2021-11-07 01:54:15,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:54:15,222 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-07 01:54:15,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:15,254 INFO L225 Difference]: With dead ends: 1163 [2021-11-07 01:54:15,255 INFO L226 Difference]: Without dead ends: 648 [2021-11-07 01:54:15,265 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 84 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 01:54:15,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-11-07 01:54:15,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 648. [2021-11-07 01:54:15,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 642 states have (on average 1.7601246105919004) internal successors, (1130), 647 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states 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 01:54:15,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1130 transitions. [2021-11-07 01:54:15,369 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1130 transitions. Word has length 43 [2021-11-07 01:54:15,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:15,376 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1130 transitions. [2021-11-07 01:54:15,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 01:54:15,377 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1130 transitions. [2021-11-07 01:54:15,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 01:54:15,395 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:15,395 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] [2021-11-07 01:54:15,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:15,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:15,601 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 01:54:15,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:15,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1105745244, now seen corresponding path program 1 times [2021-11-07 01:54:15,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:15,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1068976643] [2021-11-07 01:54:15,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:15,603 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:15,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:15,605 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:15,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:54:15,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:15,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:54:15,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:16,100 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 01:54:16,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:16,233 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 01:54:16,234 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:16,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1068976643] [2021-11-07 01:54:16,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1068976643] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:16,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:16,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:54:16,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780135691] [2021-11-07 01:54:16,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:54:16,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:16,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:54:16,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:54:16,241 INFO L87 Difference]: Start difference. First operand 648 states and 1130 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 01:54:16,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:16,382 INFO L93 Difference]: Finished difference Result 1914 states and 3342 transitions. [2021-11-07 01:54:16,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:54:16,383 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 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 44 [2021-11-07 01:54:16,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:16,396 INFO L225 Difference]: With dead ends: 1914 [2021-11-07 01:54:16,396 INFO L226 Difference]: Without dead ends: 1281 [2021-11-07 01:54:16,399 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 84 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 01:54:16,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-11-07 01:54:16,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 647. [2021-11-07 01:54:16,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 641 states have (on average 1.7550702028081124) internal successors, (1125), 646 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states 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 01:54:16,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1125 transitions. [2021-11-07 01:54:16,466 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1125 transitions. Word has length 44 [2021-11-07 01:54:16,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:16,467 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 1125 transitions. [2021-11-07 01:54:16,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states 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 01:54:16,467 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1125 transitions. [2021-11-07 01:54:16,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 01:54:16,478 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:16,478 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] [2021-11-07 01:54:16,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:16,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:16,696 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 01:54:16,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:16,697 INFO L85 PathProgramCache]: Analyzing trace with hash -105731530, now seen corresponding path program 1 times [2021-11-07 01:54:16,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:16,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [606399434] [2021-11-07 01:54:16,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:16,698 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:16,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:16,699 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:16,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:54:17,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:17,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:54:17,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:17,257 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 01:54:17,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:17,394 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 01:54:17,395 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:17,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [606399434] [2021-11-07 01:54:17,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [606399434] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:17,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:17,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:54:17,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758791272] [2021-11-07 01:54:17,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:54:17,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:17,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:54:17,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:54:17,400 INFO L87 Difference]: Start difference. First operand 647 states and 1125 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states 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 01:54:17,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:17,691 INFO L93 Difference]: Finished difference Result 2505 states and 4362 transitions. [2021-11-07 01:54:17,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:54:17,692 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-07 01:54:17,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:17,706 INFO L225 Difference]: With dead ends: 2505 [2021-11-07 01:54:17,706 INFO L226 Difference]: Without dead ends: 1876 [2021-11-07 01:54:17,708 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 86 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 01:54:17,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1876 states. [2021-11-07 01:54:17,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1876 to 646. [2021-11-07 01:54:17,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 640 states have (on average 1.7515625) internal successors, (1121), 645 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states 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 01:54:17,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1121 transitions. [2021-11-07 01:54:17,765 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1121 transitions. Word has length 46 [2021-11-07 01:54:17,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:17,766 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 1121 transitions. [2021-11-07 01:54:17,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states 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 01:54:17,767 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1121 transitions. [2021-11-07 01:54:17,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 01:54:17,769 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:17,769 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] [2021-11-07 01:54:17,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:17,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:17,985 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 01:54:17,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:17,986 INFO L85 PathProgramCache]: Analyzing trace with hash 3393219, now seen corresponding path program 1 times [2021-11-07 01:54:17,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:17,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1492040339] [2021-11-07 01:54:17,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:17,988 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:17,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:17,992 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:18,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:54:18,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:18,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:54:18,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:18,609 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 01:54:18,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:18,731 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 01:54:18,732 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:18,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1492040339] [2021-11-07 01:54:18,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1492040339] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:18,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:18,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:54:18,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23815606] [2021-11-07 01:54:18,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:54:18,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:18,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:54:18,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:54:18,735 INFO L87 Difference]: Start difference. First operand 646 states and 1121 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:18,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:18,833 INFO L93 Difference]: Finished difference Result 1289 states and 2239 transitions. [2021-11-07 01:54:18,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:54:18,834 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-07 01:54:18,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:18,839 INFO L225 Difference]: With dead ends: 1289 [2021-11-07 01:54:18,839 INFO L226 Difference]: Without dead ends: 651 [2021-11-07 01:54:18,841 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 90 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 01:54:18,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-11-07 01:54:18,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 646. [2021-11-07 01:54:18,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 640 states have (on average 1.746875) internal successors, (1118), 645 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states 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 01:54:18,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1118 transitions. [2021-11-07 01:54:18,892 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1118 transitions. Word has length 47 [2021-11-07 01:54:18,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:18,893 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 1118 transitions. [2021-11-07 01:54:18,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:18,893 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1118 transitions. [2021-11-07 01:54:18,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:54:18,896 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:18,896 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] [2021-11-07 01:54:18,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:19,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:19,116 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 01:54:19,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:19,117 INFO L85 PathProgramCache]: Analyzing trace with hash 590741070, now seen corresponding path program 1 times [2021-11-07 01:54:19,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:19,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2023195309] [2021-11-07 01:54:19,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:19,120 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:19,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:19,122 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:19,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:54:19,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:19,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:54:19,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:19,783 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 01:54:19,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:19,927 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 01:54:19,927 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:19,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2023195309] [2021-11-07 01:54:19,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2023195309] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:19,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:19,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:54:19,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78987518] [2021-11-07 01:54:19,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:54:19,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:19,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:54:19,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:54:19,929 INFO L87 Difference]: Start difference. First operand 646 states and 1118 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 01:54:20,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:20,319 INFO L93 Difference]: Finished difference Result 2492 states and 4338 transitions. [2021-11-07 01:54:20,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:54:20,320 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 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 48 [2021-11-07 01:54:20,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:20,334 INFO L225 Difference]: With dead ends: 2492 [2021-11-07 01:54:20,335 INFO L226 Difference]: Without dead ends: 1872 [2021-11-07 01:54:20,336 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 90 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 01:54:20,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2021-11-07 01:54:20,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 646. [2021-11-07 01:54:20,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 640 states have (on average 1.7421875) internal successors, (1115), 645 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states 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 01:54:20,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1115 transitions. [2021-11-07 01:54:20,404 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1115 transitions. Word has length 48 [2021-11-07 01:54:20,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:20,405 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 1115 transitions. [2021-11-07 01:54:20,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 01:54:20,405 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1115 transitions. [2021-11-07 01:54:20,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 01:54:20,408 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:20,408 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] [2021-11-07 01:54:20,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:20,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:20,623 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 01:54:20,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:20,624 INFO L85 PathProgramCache]: Analyzing trace with hash 2059205747, now seen corresponding path program 1 times [2021-11-07 01:54:20,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:20,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1631688568] [2021-11-07 01:54:20,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:20,625 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:20,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:20,627 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:20,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:54:21,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:21,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:54:21,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:21,324 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 01:54:21,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:21,471 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 01:54:21,471 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:21,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1631688568] [2021-11-07 01:54:21,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1631688568] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:21,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:21,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:54:21,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627076335] [2021-11-07 01:54:21,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:54:21,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:21,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:54:21,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:54:21,474 INFO L87 Difference]: Start difference. First operand 646 states and 1115 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:21,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:21,613 INFO L93 Difference]: Finished difference Result 1633 states and 2817 transitions. [2021-11-07 01:54:21,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:54:21,614 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-07 01:54:21,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:21,623 INFO L225 Difference]: With dead ends: 1633 [2021-11-07 01:54:21,623 INFO L226 Difference]: Without dead ends: 1266 [2021-11-07 01:54:21,624 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 96 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 01:54:21,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1266 states. [2021-11-07 01:54:21,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1266 to 899. [2021-11-07 01:54:21,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 893 states have (on average 1.7704367301231803) internal successors, (1581), 898 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states 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 01:54:21,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1581 transitions. [2021-11-07 01:54:21,705 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1581 transitions. Word has length 50 [2021-11-07 01:54:21,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:21,706 INFO L470 AbstractCegarLoop]: Abstraction has 899 states and 1581 transitions. [2021-11-07 01:54:21,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:21,706 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1581 transitions. [2021-11-07 01:54:21,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:54:21,709 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:21,709 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] [2021-11-07 01:54:21,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:21,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:21,924 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 01:54:21,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:21,925 INFO L85 PathProgramCache]: Analyzing trace with hash -761448286, now seen corresponding path program 1 times [2021-11-07 01:54:21,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:21,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [528257572] [2021-11-07 01:54:21,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:21,926 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:21,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:21,927 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:21,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:54:22,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:22,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:54:22,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:22,564 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 01:54:22,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:22,732 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 01:54:22,732 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:22,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [528257572] [2021-11-07 01:54:22,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [528257572] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:22,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:22,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:54:22,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30890729] [2021-11-07 01:54:22,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:54:22,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:22,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:54:22,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:54:22,735 INFO L87 Difference]: Start difference. First operand 899 states and 1581 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 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 01:54:22,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:22,862 INFO L93 Difference]: Finished difference Result 2282 states and 4016 transitions. [2021-11-07 01:54:22,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:54:22,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 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 62 [2021-11-07 01:54:22,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:22,880 INFO L225 Difference]: With dead ends: 2282 [2021-11-07 01:54:22,880 INFO L226 Difference]: Without dead ends: 1467 [2021-11-07 01:54:22,886 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 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 01:54:22,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2021-11-07 01:54:22,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 1100. [2021-11-07 01:54:22,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 1094 states have (on average 1.7824497257769654) internal successors, (1950), 1099 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states 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 01:54:22,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1950 transitions. [2021-11-07 01:54:22,983 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1950 transitions. Word has length 62 [2021-11-07 01:54:22,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:22,985 INFO L470 AbstractCegarLoop]: Abstraction has 1100 states and 1950 transitions. [2021-11-07 01:54:22,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 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 01:54:22,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1950 transitions. [2021-11-07 01:54:22,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:54:22,987 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:22,988 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] [2021-11-07 01:54:23,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:23,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:23,204 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 01:54:23,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:23,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1866900707, now seen corresponding path program 1 times [2021-11-07 01:54:23,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:23,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [545763846] [2021-11-07 01:54:23,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:23,206 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:23,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:23,208 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:23,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:54:23,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:23,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:54:23,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:23,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:54:23,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:24,153 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 01:54:24,154 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:24,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [545763846] [2021-11-07 01:54:24,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [545763846] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:24,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:24,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:54:24,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142274778] [2021-11-07 01:54:24,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:54:24,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:24,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:54:24,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:54:24,156 INFO L87 Difference]: Start difference. First operand 1100 states and 1950 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 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 01:54:24,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:24,302 INFO L93 Difference]: Finished difference Result 2929 states and 5209 transitions. [2021-11-07 01:54:24,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:54:24,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 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 63 [2021-11-07 01:54:24,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:24,317 INFO L225 Difference]: With dead ends: 2929 [2021-11-07 01:54:24,317 INFO L226 Difference]: Without dead ends: 1917 [2021-11-07 01:54:24,319 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 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 01:54:24,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2021-11-07 01:54:24,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1550. [2021-11-07 01:54:24,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1544 states have (on average 1.799222797927461) internal successors, (2778), 1549 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states 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 01:54:24,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 2778 transitions. [2021-11-07 01:54:24,477 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 2778 transitions. Word has length 63 [2021-11-07 01:54:24,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:24,477 INFO L470 AbstractCegarLoop]: Abstraction has 1550 states and 2778 transitions. [2021-11-07 01:54:24,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 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 01:54:24,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 2778 transitions. [2021-11-07 01:54:24,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:54:24,481 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:24,481 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] [2021-11-07 01:54:24,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:24,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:24,697 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 01:54:24,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:24,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1093412077, now seen corresponding path program 1 times [2021-11-07 01:54:24,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:24,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [101163195] [2021-11-07 01:54:24,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:24,699 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:24,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:24,700 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:24,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:54:25,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:25,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:54:25,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:25,367 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 01:54:25,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:25,524 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 01:54:25,525 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:25,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [101163195] [2021-11-07 01:54:25,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [101163195] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:25,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:25,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:54:25,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031592374] [2021-11-07 01:54:25,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:54:25,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:25,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:54:25,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:54:25,527 INFO L87 Difference]: Start difference. First operand 1550 states and 2778 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:25,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:25,696 INFO L93 Difference]: Finished difference Result 3182 states and 5672 transitions. [2021-11-07 01:54:25,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:54:25,697 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 01:54:25,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:25,711 INFO L225 Difference]: With dead ends: 3182 [2021-11-07 01:54:25,712 INFO L226 Difference]: Without dead ends: 1917 [2021-11-07 01:54:25,714 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 124 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 01:54:25,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2021-11-07 01:54:25,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1550. [2021-11-07 01:54:25,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1544 states have (on average 1.7979274611398963) internal successors, (2776), 1549 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states 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 01:54:25,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 2776 transitions. [2021-11-07 01:54:25,839 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 2776 transitions. Word has length 64 [2021-11-07 01:54:25,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:25,839 INFO L470 AbstractCegarLoop]: Abstraction has 1550 states and 2776 transitions. [2021-11-07 01:54:25,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:25,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 2776 transitions. [2021-11-07 01:54:25,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:54:25,843 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:25,843 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:54:25,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:26,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:26,060 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 01:54:26,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:26,060 INFO L85 PathProgramCache]: Analyzing trace with hash 496455348, now seen corresponding path program 1 times [2021-11-07 01:54:26,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:26,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1233311400] [2021-11-07 01:54:26,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:26,061 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:26,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:26,062 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:26,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:54:26,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:26,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:54:26,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:26,706 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 01:54:26,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:26,880 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 01:54:26,881 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:26,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1233311400] [2021-11-07 01:54:26,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1233311400] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:26,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:26,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:54:26,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334132896] [2021-11-07 01:54:26,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:54:26,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:26,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:54:26,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:54:26,882 INFO L87 Difference]: Start difference. First operand 1550 states and 2776 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:27,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:27,090 INFO L93 Difference]: Finished difference Result 4251 states and 7642 transitions. [2021-11-07 01:54:27,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:54:27,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 01:54:27,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:27,110 INFO L225 Difference]: With dead ends: 4251 [2021-11-07 01:54:27,110 INFO L226 Difference]: Without dead ends: 2797 [2021-11-07 01:54:27,113 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 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 01:54:27,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2797 states. [2021-11-07 01:54:27,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2797 to 2430. [2021-11-07 01:54:27,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2430 states, 2424 states have (on average 1.813118811881188) internal successors, (4395), 2429 states have internal predecessors, (4395), 0 states have call successors, (0), 0 states 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 01:54:27,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2430 states to 2430 states and 4395 transitions. [2021-11-07 01:54:27,310 INFO L78 Accepts]: Start accepts. Automaton has 2430 states and 4395 transitions. Word has length 64 [2021-11-07 01:54:27,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:27,310 INFO L470 AbstractCegarLoop]: Abstraction has 2430 states and 4395 transitions. [2021-11-07 01:54:27,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:27,311 INFO L276 IsEmpty]: Start isEmpty. Operand 2430 states and 4395 transitions. [2021-11-07 01:54:27,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:54:27,318 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:27,318 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:54:27,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:27,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:27,538 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 01:54:27,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:27,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1569126943, now seen corresponding path program 1 times [2021-11-07 01:54:27,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:27,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1661653221] [2021-11-07 01:54:27,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:27,539 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:27,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:27,540 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:27,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:54:28,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:28,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:54:28,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:28,209 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 01:54:28,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:28,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:54:28,373 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:28,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1661653221] [2021-11-07 01:54:28,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1661653221] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:28,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:28,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:54:28,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473063257] [2021-11-07 01:54:28,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:54:28,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:28,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:54:28,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:54:28,374 INFO L87 Difference]: Start difference. First operand 2430 states and 4395 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 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 01:54:28,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:28,691 INFO L93 Difference]: Finished difference Result 6627 states and 12018 transitions. [2021-11-07 01:54:28,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:54:28,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 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 65 [2021-11-07 01:54:28,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:28,720 INFO L225 Difference]: With dead ends: 6627 [2021-11-07 01:54:28,720 INFO L226 Difference]: Without dead ends: 4327 [2021-11-07 01:54:28,726 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 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 01:54:28,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4327 states. [2021-11-07 01:54:29,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4327 to 3960. [2021-11-07 01:54:29,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3960 states, 3954 states have (on average 1.8229640870005057) internal successors, (7208), 3959 states have internal predecessors, (7208), 0 states have call successors, (0), 0 states 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 01:54:29,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3960 states to 3960 states and 7208 transitions. [2021-11-07 01:54:29,026 INFO L78 Accepts]: Start accepts. Automaton has 3960 states and 7208 transitions. Word has length 65 [2021-11-07 01:54:29,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:29,027 INFO L470 AbstractCegarLoop]: Abstraction has 3960 states and 7208 transitions. [2021-11-07 01:54:29,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 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 01:54:29,028 INFO L276 IsEmpty]: Start isEmpty. Operand 3960 states and 7208 transitions. [2021-11-07 01:54:29,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:54:29,037 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:29,037 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:54:29,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:29,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:29,256 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 01:54:29,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:29,256 INFO L85 PathProgramCache]: Analyzing trace with hash 75319299, now seen corresponding path program 1 times [2021-11-07 01:54:29,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:29,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1629696458] [2021-11-07 01:54:29,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:29,257 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:29,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:29,259 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:29,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:54:30,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:30,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:54:30,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:30,232 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 01:54:30,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:30,423 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 01:54:30,423 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:30,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1629696458] [2021-11-07 01:54:30,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1629696458] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:30,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:30,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:54:30,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870206913] [2021-11-07 01:54:30,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:54:30,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:30,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:54:30,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:54:30,426 INFO L87 Difference]: Start difference. First operand 3960 states and 7208 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 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 01:54:30,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:30,885 INFO L93 Difference]: Finished difference Result 10933 states and 19940 transitions. [2021-11-07 01:54:30,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:54:30,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 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 66 [2021-11-07 01:54:30,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:30,927 INFO L225 Difference]: With dead ends: 10933 [2021-11-07 01:54:30,927 INFO L226 Difference]: Without dead ends: 7137 [2021-11-07 01:54:30,935 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 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 01:54:30,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7137 states. [2021-11-07 01:54:31,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7137 to 6770. [2021-11-07 01:54:31,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6770 states, 6764 states have (on average 1.8286516853932584) internal successors, (12369), 6769 states have internal predecessors, (12369), 0 states have call successors, (0), 0 states 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 01:54:31,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6770 states to 6770 states and 12369 transitions. [2021-11-07 01:54:31,561 INFO L78 Accepts]: Start accepts. Automaton has 6770 states and 12369 transitions. Word has length 66 [2021-11-07 01:54:31,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:31,561 INFO L470 AbstractCegarLoop]: Abstraction has 6770 states and 12369 transitions. [2021-11-07 01:54:31,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 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 01:54:31,562 INFO L276 IsEmpty]: Start isEmpty. Operand 6770 states and 12369 transitions. [2021-11-07 01:54:31,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:54:31,569 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:31,570 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] [2021-11-07 01:54:31,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:31,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:31,787 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 01:54:31,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:31,788 INFO L85 PathProgramCache]: Analyzing trace with hash 2023342911, now seen corresponding path program 1 times [2021-11-07 01:54:31,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:31,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2091340381] [2021-11-07 01:54:31,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:31,789 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:31,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:31,791 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:31,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:54:32,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:32,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:54:32,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:32,817 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 01:54:32,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:33,084 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 01:54:33,084 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:33,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2091340381] [2021-11-07 01:54:33,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2091340381] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:33,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:33,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:54:33,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064139418] [2021-11-07 01:54:33,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:54:33,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:33,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:54:33,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:54:33,088 INFO L87 Difference]: Start difference. First operand 6770 states and 12369 transitions. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:36,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:36,574 INFO L93 Difference]: Finished difference Result 25603 states and 46832 transitions. [2021-11-07 01:54:36,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:54:36,575 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 01:54:36,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:36,638 INFO L225 Difference]: With dead ends: 25603 [2021-11-07 01:54:36,638 INFO L226 Difference]: Without dead ends: 19116 [2021-11-07 01:54:36,652 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 128 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 01:54:36,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19116 states. [2021-11-07 01:54:37,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19116 to 6720. [2021-11-07 01:54:37,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6720 states, 6714 states have (on average 1.812481382186476) internal successors, (12169), 6719 states have internal predecessors, (12169), 0 states have call successors, (0), 0 states 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 01:54:37,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6720 states to 6720 states and 12169 transitions. [2021-11-07 01:54:37,328 INFO L78 Accepts]: Start accepts. Automaton has 6720 states and 12169 transitions. Word has length 67 [2021-11-07 01:54:37,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:37,328 INFO L470 AbstractCegarLoop]: Abstraction has 6720 states and 12169 transitions. [2021-11-07 01:54:37,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:37,328 INFO L276 IsEmpty]: Start isEmpty. Operand 6720 states and 12169 transitions. [2021-11-07 01:54:37,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:54:37,335 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:37,335 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] [2021-11-07 01:54:37,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:37,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:37,549 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 01:54:37,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:37,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1819800304, now seen corresponding path program 1 times [2021-11-07 01:54:37,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:37,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1357172326] [2021-11-07 01:54:37,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:37,550 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:37,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:37,552 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:37,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:54:38,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:38,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:54:38,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:38,403 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 01:54:38,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:38,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:54:38,607 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:38,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1357172326] [2021-11-07 01:54:38,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1357172326] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:38,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:38,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:54:38,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529398842] [2021-11-07 01:54:38,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:54:38,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:38,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:54:38,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:54:38,610 INFO L87 Difference]: Start difference. First operand 6720 states and 12169 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:39,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:39,305 INFO L93 Difference]: Finished difference Result 19674 states and 35677 transitions. [2021-11-07 01:54:39,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:54:39,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 01:54:39,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:39,352 INFO L225 Difference]: With dead ends: 19674 [2021-11-07 01:54:39,353 INFO L226 Difference]: Without dead ends: 13121 [2021-11-07 01:54:39,365 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 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 01:54:39,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13121 states. [2021-11-07 01:54:40,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13121 to 12754. [2021-11-07 01:54:40,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12754 states, 12748 states have (on average 1.8144022591779103) internal successors, (23130), 12753 states have internal predecessors, (23130), 0 states have call successors, (0), 0 states 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 01:54:40,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12754 states to 12754 states and 23130 transitions. [2021-11-07 01:54:40,306 INFO L78 Accepts]: Start accepts. Automaton has 12754 states and 23130 transitions. Word has length 67 [2021-11-07 01:54:40,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:40,306 INFO L470 AbstractCegarLoop]: Abstraction has 12754 states and 23130 transitions. [2021-11-07 01:54:40,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:40,307 INFO L276 IsEmpty]: Start isEmpty. Operand 12754 states and 23130 transitions. [2021-11-07 01:54:40,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:54:40,316 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:40,316 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] [2021-11-07 01:54:40,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:40,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:40,534 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 01:54:40,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:40,535 INFO L85 PathProgramCache]: Analyzing trace with hash 433363812, now seen corresponding path program 1 times [2021-11-07 01:54:40,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:40,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1055215687] [2021-11-07 01:54:40,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:40,536 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:40,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:40,538 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:40,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:54:41,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:41,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:54:41,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:41,528 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 01:54:41,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:41,783 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 01:54:41,783 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:41,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1055215687] [2021-11-07 01:54:41,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1055215687] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:54:41,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [824151178] [2021-11-07 01:54:41,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:41,784 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:54:41,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:54:41,786 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:54:41,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:54:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:42,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:54:42,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:43,093 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 01:54:43,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:43,408 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 01:54:43,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [824151178] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:43,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:54:43,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 01:54:43,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298966794] [2021-11-07 01:54:43,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:54:43,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:43,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:54:43,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:54:43,410 INFO L87 Difference]: Start difference. First operand 12754 states and 23130 transitions. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 01:54:50,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:50,967 INFO L93 Difference]: Finished difference Result 79278 states and 143799 transitions. [2021-11-07 01:54:50,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 01:54:50,968 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:54:50,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:51,158 INFO L225 Difference]: With dead ends: 79278 [2021-11-07 01:54:51,158 INFO L226 Difference]: Without dead ends: 78929 [2021-11-07 01:54:51,180 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 01:54:51,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78929 states. [2021-11-07 01:54:53,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78929 to 25353. [2021-11-07 01:54:53,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25353 states, 25347 states have (on average 1.815126050420168) internal successors, (46008), 25352 states have internal predecessors, (46008), 0 states have call successors, (0), 0 states 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 01:54:53,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25353 states to 25353 states and 46008 transitions. [2021-11-07 01:54:53,987 INFO L78 Accepts]: Start accepts. Automaton has 25353 states and 46008 transitions. Word has length 68 [2021-11-07 01:54:53,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:53,987 INFO L470 AbstractCegarLoop]: Abstraction has 25353 states and 46008 transitions. [2021-11-07 01:54:53,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 01:54:53,988 INFO L276 IsEmpty]: Start isEmpty. Operand 25353 states and 46008 transitions. [2021-11-07 01:54:54,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:54:54,002 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:54,002 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] [2021-11-07 01:54:54,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:54,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 01:54:54,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:54,409 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 01:54:54,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:54,409 INFO L85 PathProgramCache]: Analyzing trace with hash -115379775, now seen corresponding path program 1 times [2021-11-07 01:54:54,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:54,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1675633576] [2021-11-07 01:54:54,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:54,410 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:54,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:54,412 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:54,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:54:55,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:55,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:54:55,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:55,375 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 01:54:55,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:55,633 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 01:54:55,634 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:55,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1675633576] [2021-11-07 01:54:55,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1675633576] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:54:55,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1896381937] [2021-11-07 01:54:55,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:55,634 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:54:55,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:54:55,640 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:54:55,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:54:56,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:56,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:54:56,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:56,809 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 01:54:56,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:57,028 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 01:54:57,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1896381937] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:57,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:54:57,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 01:54:57,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560540842] [2021-11-07 01:54:57,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:54:57,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:57,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:54:57,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:54:57,031 INFO L87 Difference]: Start difference. First operand 25353 states and 46008 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 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 01:55:00,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:00,339 INFO L93 Difference]: Finished difference Result 26342 states and 47671 transitions. [2021-11-07 01:55:00,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:55:00,340 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 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 69 [2021-11-07 01:55:00,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:00,395 INFO L225 Difference]: With dead ends: 26342 [2021-11-07 01:55:00,396 INFO L226 Difference]: Without dead ends: 25771 [2021-11-07 01:55:00,406 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 263 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 01:55:00,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25771 states. [2021-11-07 01:55:02,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25771 to 25347. [2021-11-07 01:55:02,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25347 states, 25341 states have (on average 1.8150428159898977) internal successors, (45995), 25346 states have internal predecessors, (45995), 0 states have call successors, (0), 0 states 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 01:55:02,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25347 states to 25347 states and 45995 transitions. [2021-11-07 01:55:02,497 INFO L78 Accepts]: Start accepts. Automaton has 25347 states and 45995 transitions. Word has length 69 [2021-11-07 01:55:02,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:02,497 INFO L470 AbstractCegarLoop]: Abstraction has 25347 states and 45995 transitions. [2021-11-07 01:55:02,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 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 01:55:02,498 INFO L276 IsEmpty]: Start isEmpty. Operand 25347 states and 45995 transitions. [2021-11-07 01:55:02,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:55:02,513 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:02,513 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] [2021-11-07 01:55:02,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:02,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:02,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:02,921 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 01:55:02,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:02,922 INFO L85 PathProgramCache]: Analyzing trace with hash 683733265, now seen corresponding path program 1 times [2021-11-07 01:55:02,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:02,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [279559858] [2021-11-07 01:55:02,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:02,922 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:02,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:02,923 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:02,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:55:03,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:03,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:55:03,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:03,943 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 01:55:03,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:04,130 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 01:55:04,130 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:04,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [279559858] [2021-11-07 01:55:04,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [279559858] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:04,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:04,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:55:04,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559095367] [2021-11-07 01:55:04,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:55:04,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:04,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:55:04,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:55:04,133 INFO L87 Difference]: Start difference. First operand 25347 states and 45995 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 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 01:55:05,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:05,715 INFO L93 Difference]: Finished difference Result 49799 states and 90587 transitions. [2021-11-07 01:55:05,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:55:05,716 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 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 69 [2021-11-07 01:55:05,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:05,755 INFO L225 Difference]: With dead ends: 49799 [2021-11-07 01:55:05,755 INFO L226 Difference]: Without dead ends: 24738 [2021-11-07 01:55:05,787 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 134 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 01:55:05,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24738 states. [2021-11-07 01:55:06,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24738 to 12752. [2021-11-07 01:55:06,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12752 states, 12746 states have (on average 1.8139808567393692) internal successors, (23121), 12751 states have internal predecessors, (23121), 0 states have call successors, (0), 0 states 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 01:55:07,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12752 states to 12752 states and 23121 transitions. [2021-11-07 01:55:07,016 INFO L78 Accepts]: Start accepts. Automaton has 12752 states and 23121 transitions. Word has length 69 [2021-11-07 01:55:07,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:07,016 INFO L470 AbstractCegarLoop]: Abstraction has 12752 states and 23121 transitions. [2021-11-07 01:55:07,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 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 01:55:07,016 INFO L276 IsEmpty]: Start isEmpty. Operand 12752 states and 23121 transitions. [2021-11-07 01:55:07,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:55:07,023 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:07,024 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] [2021-11-07 01:55:07,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:07,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:07,229 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 01:55:07,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:07,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1321674093, now seen corresponding path program 1 times [2021-11-07 01:55:07,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:07,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352645769] [2021-11-07 01:55:07,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:07,231 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:07,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:07,232 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:07,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:55:08,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:08,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:55:08,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:08,358 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 01:55:08,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:08,593 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 01:55:08,593 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:08,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352645769] [2021-11-07 01:55:08,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352645769] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:55:08,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2031402011] [2021-11-07 01:55:08,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:08,594 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:55:08,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:55:08,595 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:55:08,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 01:55:09,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:09,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:55:09,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:10,155 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 01:55:10,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:10,610 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 01:55:10,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2031402011] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:10,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:55:10,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [5, 5] total 17 [2021-11-07 01:55:10,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227993908] [2021-11-07 01:55:10,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:55:10,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:10,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:55:10,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:55:10,613 INFO L87 Difference]: Start difference. First operand 12752 states and 23121 transitions. Second operand has 11 states, 11 states have (on average 11.181818181818182) internal successors, (123), 11 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 01:55:19,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:19,203 INFO L93 Difference]: Finished difference Result 51882 states and 94363 transitions. [2021-11-07 01:55:19,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 01:55:19,204 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.181818181818182) internal successors, (123), 11 states have internal predecessors, (123), 0 states have call successors, (0), 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 71 [2021-11-07 01:55:19,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:19,281 INFO L225 Difference]: With dead ends: 51882 [2021-11-07 01:55:19,281 INFO L226 Difference]: Without dead ends: 51854 [2021-11-07 01:55:19,289 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=232, Invalid=958, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 01:55:19,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51854 states. [2021-11-07 01:55:20,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51854 to 12760. [2021-11-07 01:55:20,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12760 states, 12754 states have (on average 1.8133134702838325) internal successors, (23127), 12759 states have internal predecessors, (23127), 0 states have call successors, (0), 0 states 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 01:55:20,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12760 states to 12760 states and 23127 transitions. [2021-11-07 01:55:20,462 INFO L78 Accepts]: Start accepts. Automaton has 12760 states and 23127 transitions. Word has length 71 [2021-11-07 01:55:20,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:20,463 INFO L470 AbstractCegarLoop]: Abstraction has 12760 states and 23127 transitions. [2021-11-07 01:55:20,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.181818181818182) internal successors, (123), 11 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 01:55:20,463 INFO L276 IsEmpty]: Start isEmpty. Operand 12760 states and 23127 transitions. [2021-11-07 01:55:20,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:55:20,469 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:20,469 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] [2021-11-07 01:55:20,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:20,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-07 01:55:20,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:20,870 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 01:55:20,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:20,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1979354221, now seen corresponding path program 1 times [2021-11-07 01:55:20,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:20,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1839093733] [2021-11-07 01:55:20,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:20,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:20,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:20,873 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:20,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:55:21,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:21,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:55:21,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:22,080 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 01:55:22,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:22,311 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 01:55:22,312 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:22,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1839093733] [2021-11-07 01:55:22,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1839093733] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:55:22,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1043568442] [2021-11-07 01:55:22,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:22,312 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:55:22,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:55:22,314 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:55:22,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 01:55:23,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:23,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 01:55:23,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:23,894 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 01:55:23,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:24,129 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 01:55:24,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1043568442] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:24,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:55:24,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 15 [2021-11-07 01:55:24,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242065792] [2021-11-07 01:55:24,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:55:24,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:24,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:55:24,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:55:24,132 INFO L87 Difference]: Start difference. First operand 12760 states and 23127 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 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 01:55:27,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:27,676 INFO L93 Difference]: Finished difference Result 13163 states and 23807 transitions. [2021-11-07 01:55:27,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 01:55:27,677 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 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 72 [2021-11-07 01:55:27,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:27,699 INFO L225 Difference]: With dead ends: 13163 [2021-11-07 01:55:27,699 INFO L226 Difference]: Without dead ends: 12858 [2021-11-07 01:55:27,703 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2021-11-07 01:55:27,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12858 states. [2021-11-07 01:55:28,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12858 to 12742. [2021-11-07 01:55:28,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12742 states, 12739 states have (on average 1.8133291467148127) internal successors, (23100), 12741 states have internal predecessors, (23100), 0 states have call successors, (0), 0 states 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 01:55:28,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12742 states to 12742 states and 23100 transitions. [2021-11-07 01:55:28,839 INFO L78 Accepts]: Start accepts. Automaton has 12742 states and 23100 transitions. Word has length 72 [2021-11-07 01:55:28,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:28,840 INFO L470 AbstractCegarLoop]: Abstraction has 12742 states and 23100 transitions. [2021-11-07 01:55:28,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 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 01:55:28,840 INFO L276 IsEmpty]: Start isEmpty. Operand 12742 states and 23100 transitions. [2021-11-07 01:55:28,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 01:55:28,855 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:28,855 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:55:28,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:29,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-07 01:55:29,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:29,257 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:29,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:29,257 INFO L85 PathProgramCache]: Analyzing trace with hash 141031649, now seen corresponding path program 1 times [2021-11-07 01:55:29,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:29,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1495293013] [2021-11-07 01:55:29,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:29,258 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:29,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:29,259 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:29,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:55:30,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:30,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:55:30,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:30,600 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 01:55:30,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:30,928 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 01:55:30,928 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:30,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1495293013] [2021-11-07 01:55:30,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1495293013] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:55:30,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [765382314] [2021-11-07 01:55:30,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:30,929 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:55:30,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:55:30,930 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:55:30,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 01:55:32,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:32,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:55:32,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:32,691 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 01:55:32,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:32,978 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 01:55:32,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [765382314] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:32,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:55:32,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [5, 5] total 17 [2021-11-07 01:55:32,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265980386] [2021-11-07 01:55:32,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:55:32,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:32,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:55:32,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:55:32,980 INFO L87 Difference]: Start difference. First operand 12742 states and 23100 transitions. Second operand has 11 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 states have internal predecessors, (109), 0 states have call successors, (0), 0 states 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 01:55:38,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:38,861 INFO L93 Difference]: Finished difference Result 14791 states and 26574 transitions. [2021-11-07 01:55:38,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:55:38,862 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 states have internal predecessors, (109), 0 states have call successors, (0), 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 98 [2021-11-07 01:55:38,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:38,882 INFO L225 Difference]: With dead ends: 14791 [2021-11-07 01:55:38,882 INFO L226 Difference]: Without dead ends: 14504 [2021-11-07 01:55:38,885 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2021-11-07 01:55:38,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14504 states. [2021-11-07 01:55:39,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14504 to 12994. [2021-11-07 01:55:39,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12994 states, 12991 states have (on average 1.8105611577245786) internal successors, (23521), 12993 states have internal predecessors, (23521), 0 states have call successors, (0), 0 states 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 01:55:39,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12994 states to 12994 states and 23521 transitions. [2021-11-07 01:55:39,901 INFO L78 Accepts]: Start accepts. Automaton has 12994 states and 23521 transitions. Word has length 98 [2021-11-07 01:55:39,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:39,901 INFO L470 AbstractCegarLoop]: Abstraction has 12994 states and 23521 transitions. [2021-11-07 01:55:39,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 states have internal predecessors, (109), 0 states have call successors, (0), 0 states 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 01:55:39,902 INFO L276 IsEmpty]: Start isEmpty. Operand 12994 states and 23521 transitions. [2021-11-07 01:55:39,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 01:55:39,917 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:39,917 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:55:39,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-11-07 01:55:40,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-07 01:55:40,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:40,338 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:40,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:40,339 INFO L85 PathProgramCache]: Analyzing trace with hash 961413418, now seen corresponding path program 1 times [2021-11-07 01:55:40,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:40,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1648392369] [2021-11-07 01:55:40,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:40,339 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:40,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:40,340 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:40,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 01:55:41,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:41,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:55:41,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:41,773 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 01:55:41,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:42,064 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 01:55:42,064 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:42,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1648392369] [2021-11-07 01:55:42,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1648392369] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:55:42,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [832982355] [2021-11-07 01:55:42,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:42,065 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:55:42,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:55:42,066 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:55:42,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 01:55:43,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:43,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 01:55:43,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:43,862 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 01:55:43,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:44,098 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 01:55:44,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [832982355] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:44,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:55:44,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 14 [2021-11-07 01:55:44,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516542923] [2021-11-07 01:55:44,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:55:44,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:44,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:55:44,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:55:44,100 INFO L87 Difference]: Start difference. First operand 12994 states and 23521 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 01:55:45,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:45,262 INFO L93 Difference]: Finished difference Result 13887 states and 25012 transitions. [2021-11-07 01:55:45,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:55:45,263 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 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 99 [2021-11-07 01:55:45,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:45,288 INFO L225 Difference]: With dead ends: 13887 [2021-11-07 01:55:45,288 INFO L226 Difference]: Without dead ends: 13385 [2021-11-07 01:55:45,293 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:55:45,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13385 states. [2021-11-07 01:55:46,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13385 to 12982. [2021-11-07 01:55:46,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12982 states, 12979 states have (on average 1.8101548655520456) internal successors, (23494), 12981 states have internal predecessors, (23494), 0 states have call successors, (0), 0 states 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 01:55:46,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12982 states to 12982 states and 23494 transitions. [2021-11-07 01:55:46,255 INFO L78 Accepts]: Start accepts. Automaton has 12982 states and 23494 transitions. Word has length 99 [2021-11-07 01:55:46,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:46,256 INFO L470 AbstractCegarLoop]: Abstraction has 12982 states and 23494 transitions. [2021-11-07 01:55:46,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 01:55:46,256 INFO L276 IsEmpty]: Start isEmpty. Operand 12982 states and 23494 transitions. [2021-11-07 01:55:46,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 01:55:46,274 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:46,274 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:55:46,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:46,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:46,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:55:46,675 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:46,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:46,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1290675400, now seen corresponding path program 1 times [2021-11-07 01:55:46,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:46,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [122701207] [2021-11-07 01:55:46,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:46,677 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:46,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:46,679 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:46,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 01:55:47,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:47,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:55:47,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:48,181 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 01:55:48,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:48,481 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 01:55:48,481 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:48,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [122701207] [2021-11-07 01:55:48,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [122701207] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:55:48,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1280084746] [2021-11-07 01:55:48,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:48,482 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:55:48,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:55:48,488 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:55:48,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-07 01:55:49,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:50,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:55:50,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:50,275 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 01:55:50,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:50,508 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 01:55:50,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1280084746] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:50,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:55:50,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 12 [2021-11-07 01:55:50,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731266460] [2021-11-07 01:55:50,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:55:50,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:50,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:55:50,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:55:50,510 INFO L87 Difference]: Start difference. First operand 12982 states and 23494 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 01:55:51,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:51,327 INFO L93 Difference]: Finished difference Result 13260 states and 23948 transitions. [2021-11-07 01:55:51,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:55:51,328 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 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 99 [2021-11-07 01:55:51,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:51,347 INFO L225 Difference]: With dead ends: 13260 [2021-11-07 01:55:51,347 INFO L226 Difference]: Without dead ends: 12879 [2021-11-07 01:55:51,350 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:55:51,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12879 states. [2021-11-07 01:55:52,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12879 to 12740. [2021-11-07 01:55:52,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12740 states, 12737 states have (on average 1.8125932323153018) internal successors, (23087), 12739 states have internal predecessors, (23087), 0 states have call successors, (0), 0 states 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 01:55:52,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12740 states to 12740 states and 23087 transitions. [2021-11-07 01:55:52,207 INFO L78 Accepts]: Start accepts. Automaton has 12740 states and 23087 transitions. Word has length 99 [2021-11-07 01:55:52,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:52,207 INFO L470 AbstractCegarLoop]: Abstraction has 12740 states and 23087 transitions. [2021-11-07 01:55:52,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states 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 01:55:52,207 INFO L276 IsEmpty]: Start isEmpty. Operand 12740 states and 23087 transitions. [2021-11-07 01:55:52,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 01:55:52,218 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:52,218 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:55:52,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:52,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2021-11-07 01:55:52,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:55:52,619 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:52,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:52,620 INFO L85 PathProgramCache]: Analyzing trace with hash 396377656, now seen corresponding path program 1 times [2021-11-07 01:55:52,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:52,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1954703114] [2021-11-07 01:55:52,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:52,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:52,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:52,622 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:52,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 01:55:53,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:53,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:55:53,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:54,258 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 01:55:54,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:54,565 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 01:55:54,565 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:54,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1954703114] [2021-11-07 01:55:54,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1954703114] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:55:54,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2017122788] [2021-11-07 01:55:54,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:54,566 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:55:54,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:55:54,567 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:55:54,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-07 01:55:56,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:56,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:55:56,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:56,533 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 01:55:56,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:56,744 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 01:55:56,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2017122788] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:56,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:55:56,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [5, 5] total 13 [2021-11-07 01:55:56,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527141664] [2021-11-07 01:55:56,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:55:56,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:56,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:55:56,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:55:56,746 INFO L87 Difference]: Start difference. First operand 12740 states and 23087 transitions. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 01:55:57,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:57,485 INFO L93 Difference]: Finished difference Result 12960 states and 23445 transitions. [2021-11-07 01:55:57,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:55:57,485 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 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 101 [2021-11-07 01:55:57,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:57,501 INFO L225 Difference]: With dead ends: 12960 [2021-11-07 01:55:57,501 INFO L226 Difference]: Without dead ends: 12740 [2021-11-07 01:55:57,504 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:55:57,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12740 states. [2021-11-07 01:55:58,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12740 to 12740. [2021-11-07 01:55:58,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12740 states, 12737 states have (on average 1.8122791866216534) internal successors, (23083), 12739 states have internal predecessors, (23083), 0 states have call successors, (0), 0 states 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 01:55:58,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12740 states to 12740 states and 23083 transitions. [2021-11-07 01:55:58,191 INFO L78 Accepts]: Start accepts. Automaton has 12740 states and 23083 transitions. Word has length 101 [2021-11-07 01:55:58,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:58,192 INFO L470 AbstractCegarLoop]: Abstraction has 12740 states and 23083 transitions. [2021-11-07 01:55:58,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 01:55:58,192 INFO L276 IsEmpty]: Start isEmpty. Operand 12740 states and 23083 transitions. [2021-11-07 01:55:58,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-07 01:55:58,203 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:58,203 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:55:58,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:58,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-11-07 01:55:58,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:58,604 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:58,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:58,605 INFO L85 PathProgramCache]: Analyzing trace with hash 630964791, now seen corresponding path program 1 times [2021-11-07 01:55:58,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:58,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [154012987] [2021-11-07 01:55:58,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:58,606 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:58,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:58,607 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:58,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-07 01:55:59,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:59,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:55:59,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:00,282 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 01:56:00,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:00,631 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 01:56:00,631 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:00,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [154012987] [2021-11-07 01:56:00,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [154012987] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:00,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1116940550] [2021-11-07 01:56:00,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:00,632 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:00,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:56:00,633 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:56:00,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-07 01:56:02,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:02,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:56:02,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:02,797 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 01:56:02,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:03,111 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 01:56:03,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1116940550] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:03,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:56:03,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [5, 5] total 17 [2021-11-07 01:56:03,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225467429] [2021-11-07 01:56:03,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:56:03,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:03,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:56:03,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:56:03,114 INFO L87 Difference]: Start difference. First operand 12740 states and 23083 transitions. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:08,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:08,368 INFO L93 Difference]: Finished difference Result 13479 states and 24243 transitions. [2021-11-07 01:56:08,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:56:08,368 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-11-07 01:56:08,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:08,388 INFO L225 Difference]: With dead ends: 13479 [2021-11-07 01:56:08,388 INFO L226 Difference]: Without dead ends: 13259 [2021-11-07 01:56:08,393 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:56:08,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13259 states. [2021-11-07 01:56:09,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13259 to 12748. [2021-11-07 01:56:09,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12748 states, 12745 states have (on average 1.8117693213024715) internal successors, (23091), 12747 states have internal predecessors, (23091), 0 states have call successors, (0), 0 states 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 01:56:09,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12748 states to 12748 states and 23091 transitions. [2021-11-07 01:56:09,447 INFO L78 Accepts]: Start accepts. Automaton has 12748 states and 23091 transitions. Word has length 104 [2021-11-07 01:56:09,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:09,447 INFO L470 AbstractCegarLoop]: Abstraction has 12748 states and 23091 transitions. [2021-11-07 01:56:09,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:09,448 INFO L276 IsEmpty]: Start isEmpty. Operand 12748 states and 23091 transitions. [2021-11-07 01:56:09,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-07 01:56:09,462 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:09,462 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:56:09,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:09,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2021-11-07 01:56:09,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:09,881 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:56:09,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:09,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1932424524, now seen corresponding path program 1 times [2021-11-07 01:56:09,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:09,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1268595144] [2021-11-07 01:56:09,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:09,882 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:09,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:09,883 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:09,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-07 01:56:11,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:11,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:56:11,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:11,601 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 01:56:11,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:11,925 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 01:56:11,925 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:11,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1268595144] [2021-11-07 01:56:11,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1268595144] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:11,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1110368310] [2021-11-07 01:56:11,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:11,926 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:11,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:56:11,956 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:56:11,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-07 01:56:13,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:13,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 01:56:13,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:14,337 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 01:56:14,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:14,657 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 01:56:14,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1110368310] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:14,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:56:14,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [5, 5] total 16 [2021-11-07 01:56:14,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197258297] [2021-11-07 01:56:14,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:56:14,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:14,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:56:14,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:56:14,659 INFO L87 Difference]: Start difference. First operand 12748 states and 23091 transitions. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 01:56:15,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:15,932 INFO L93 Difference]: Finished difference Result 13099 states and 23659 transitions. [2021-11-07 01:56:15,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 01:56:15,933 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 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 105 [2021-11-07 01:56:15,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:15,952 INFO L225 Difference]: With dead ends: 13099 [2021-11-07 01:56:15,952 INFO L226 Difference]: Without dead ends: 12821 [2021-11-07 01:56:15,957 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2021-11-07 01:56:15,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12821 states. [2021-11-07 01:56:16,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12821 to 12739. [2021-11-07 01:56:16,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12739 states, 12736 states have (on average 1.8116363065326633) internal successors, (23073), 12738 states have internal predecessors, (23073), 0 states have call successors, (0), 0 states 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 01:56:16,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12739 states to 12739 states and 23073 transitions. [2021-11-07 01:56:16,865 INFO L78 Accepts]: Start accepts. Automaton has 12739 states and 23073 transitions. Word has length 105 [2021-11-07 01:56:16,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:16,866 INFO L470 AbstractCegarLoop]: Abstraction has 12739 states and 23073 transitions. [2021-11-07 01:56:16,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 01:56:16,866 INFO L276 IsEmpty]: Start isEmpty. Operand 12739 states and 23073 transitions. [2021-11-07 01:56:16,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-07 01:56:16,879 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:16,880 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:56:16,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:17,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:17,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:56:17,288 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:56:17,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:17,289 INFO L85 PathProgramCache]: Analyzing trace with hash -368647377, now seen corresponding path program 1 times [2021-11-07 01:56:17,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:17,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1146613793] [2021-11-07 01:56:17,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:17,289 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:17,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:17,291 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:17,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-07 01:56:18,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:18,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:56:18,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:19,027 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 01:56:19,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:19,352 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 01:56:19,352 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:19,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1146613793] [2021-11-07 01:56:19,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1146613793] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:19,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [525207650] [2021-11-07 01:56:19,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:19,353 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:19,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:56:19,354 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:56:19,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-07 01:56:21,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:21,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 01:56:21,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:22,514 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 01:56:22,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:23,227 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 01:56:23,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [525207650] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:23,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:56:23,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 24 [2021-11-07 01:56:23,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653441586] [2021-11-07 01:56:23,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 01:56:23,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:23,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 01:56:23,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:56:23,229 INFO L87 Difference]: Start difference. First operand 12739 states and 23073 transitions. Second operand has 18 states, 18 states have (on average 10.11111111111111) internal successors, (182), 17 states have internal predecessors, (182), 0 states have call successors, (0), 0 states 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 01:56:49,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:49,017 INFO L93 Difference]: Finished difference Result 40983 states and 73545 transitions. [2021-11-07 01:56:49,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-07 01:56:49,018 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.11111111111111) internal successors, (182), 17 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-07 01:56:49,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:49,076 INFO L225 Difference]: With dead ends: 40983 [2021-11-07 01:56:49,076 INFO L226 Difference]: Without dead ends: 40740 [2021-11-07 01:56:49,084 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=716, Invalid=2476, Unknown=0, NotChecked=0, Total=3192 [2021-11-07 01:56:49,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40740 states. [2021-11-07 01:56:50,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40740 to 25606. [2021-11-07 01:56:50,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25606 states, 25603 states have (on average 1.8101784947076514) internal successors, (46346), 25605 states have internal predecessors, (46346), 0 states have call successors, (0), 0 states 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 01:56:50,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25606 states to 25606 states and 46346 transitions. [2021-11-07 01:56:50,956 INFO L78 Accepts]: Start accepts. Automaton has 25606 states and 46346 transitions. Word has length 111 [2021-11-07 01:56:50,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:50,956 INFO L470 AbstractCegarLoop]: Abstraction has 25606 states and 46346 transitions. [2021-11-07 01:56:50,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.11111111111111) internal successors, (182), 17 states have internal predecessors, (182), 0 states have call successors, (0), 0 states 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 01:56:50,957 INFO L276 IsEmpty]: Start isEmpty. Operand 25606 states and 46346 transitions. [2021-11-07 01:56:50,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-07 01:56:50,994 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:50,994 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:56:51,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:51,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:51,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:51,411 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:56:51,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:51,411 INFO L85 PathProgramCache]: Analyzing trace with hash -261984987, now seen corresponding path program 1 times [2021-11-07 01:56:51,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:51,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632026233] [2021-11-07 01:56:51,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:51,412 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:51,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:51,413 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:51,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-07 01:56:53,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:53,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:56:53,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:53,396 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 01:56:53,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:53,727 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 01:56:53,727 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:53,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632026233] [2021-11-07 01:56:53,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632026233] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:56:53,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1810136199] [2021-11-07 01:56:53,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:53,728 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:56:53,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:56:53,729 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:56:53,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-11-07 01:56:56,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:56,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 01:56:56,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:56,546 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 01:56:56,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:56,896 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 01:56:56,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1810136199] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:56,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:56:56,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 15 [2021-11-07 01:56:56,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512493283] [2021-11-07 01:56:56,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:56:56,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:56,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:56:56,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:56:56,898 INFO L87 Difference]: Start difference. First operand 25606 states and 46346 transitions. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 01:57:04,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:04,544 INFO L93 Difference]: Finished difference Result 30312 states and 53856 transitions. [2021-11-07 01:57:04,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 01:57:04,545 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-07 01:57:04,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:04,589 INFO L225 Difference]: With dead ends: 30312 [2021-11-07 01:57:04,589 INFO L226 Difference]: Without dead ends: 29726 [2021-11-07 01:57:04,597 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=310, Invalid=1096, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 01:57:04,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29726 states. [2021-11-07 01:57:06,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29726 to 26456. [2021-11-07 01:57:06,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26456 states, 26453 states have (on average 1.8012701772955808) internal successors, (47649), 26455 states have internal predecessors, (47649), 0 states have call successors, (0), 0 states 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 01:57:06,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26456 states to 26456 states and 47649 transitions. [2021-11-07 01:57:06,610 INFO L78 Accepts]: Start accepts. Automaton has 26456 states and 47649 transitions. Word has length 112 [2021-11-07 01:57:06,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:06,611 INFO L470 AbstractCegarLoop]: Abstraction has 26456 states and 47649 transitions. [2021-11-07 01:57:06,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 01:57:06,611 INFO L276 IsEmpty]: Start isEmpty. Operand 26456 states and 47649 transitions. [2021-11-07 01:57:06,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-07 01:57:06,637 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:06,637 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:57:06,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:06,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:07,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:07,039 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:57:07,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:07,039 INFO L85 PathProgramCache]: Analyzing trace with hash 147649945, now seen corresponding path program 1 times [2021-11-07 01:57:07,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:07,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [947999351] [2021-11-07 01:57:07,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:07,040 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:07,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:07,041 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:07,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-07 01:57:08,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:08,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:57:08,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:09,132 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 01:57:09,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:09,424 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 01:57:09,424 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:09,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [947999351] [2021-11-07 01:57:09,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [947999351] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:57:09,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1704480062] [2021-11-07 01:57:09,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:09,425 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:57:09,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:57:09,426 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:57:09,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-11-07 01:57:11,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:11,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 01:57:11,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:12,720 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 01:57:12,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:13,283 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 01:57:13,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1704480062] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:13,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:57:13,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 24 [2021-11-07 01:57:13,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558591393] [2021-11-07 01:57:13,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 01:57:13,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:13,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 01:57:13,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:57:13,286 INFO L87 Difference]: Start difference. First operand 26456 states and 47649 transitions. Second operand has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 17 states have internal predecessors, (184), 0 states have call successors, (0), 0 states 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 01:57:39,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:39,812 INFO L93 Difference]: Finished difference Result 74084 states and 131447 transitions. [2021-11-07 01:57:39,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-07 01:57:39,813 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 17 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-07 01:57:39,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:40,047 INFO L225 Difference]: With dead ends: 74084 [2021-11-07 01:57:40,047 INFO L226 Difference]: Without dead ends: 73128 [2021-11-07 01:57:40,062 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 422 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=716, Invalid=2476, Unknown=0, NotChecked=0, Total=3192 [2021-11-07 01:57:40,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73128 states. [2021-11-07 01:57:44,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73128 to 52928. [2021-11-07 01:57:45,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52928 states, 52925 states have (on average 1.7996787907416154) internal successors, (95248), 52927 states have internal predecessors, (95248), 0 states have call successors, (0), 0 states 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 01:57:45,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52928 states to 52928 states and 95248 transitions. [2021-11-07 01:57:45,234 INFO L78 Accepts]: Start accepts. Automaton has 52928 states and 95248 transitions. Word has length 112 [2021-11-07 01:57:45,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:45,235 INFO L470 AbstractCegarLoop]: Abstraction has 52928 states and 95248 transitions. [2021-11-07 01:57:45,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 17 states have internal predecessors, (184), 0 states have call successors, (0), 0 states 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 01:57:45,235 INFO L276 IsEmpty]: Start isEmpty. Operand 52928 states and 95248 transitions. [2021-11-07 01:57:45,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-07 01:57:45,298 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:45,298 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:57:45,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:45,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:45,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:45,699 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:57:45,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:45,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1014703843, now seen corresponding path program 1 times [2021-11-07 01:57:45,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:45,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1310097857] [2021-11-07 01:57:45,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:45,701 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:45,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:45,702 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:45,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-07 01:57:47,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:47,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:57:47,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:47,987 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 01:57:47,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:48,416 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 01:57:48,416 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:48,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1310097857] [2021-11-07 01:57:48,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1310097857] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:57:48,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [404860972] [2021-11-07 01:57:48,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:48,417 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:57:48,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:57:48,419 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:57:48,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-11-07 01:57:51,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:51,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:57:51,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:51,818 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 01:57:51,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:52,071 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 01:57:52,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [404860972] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:52,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:57:52,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 01:57:52,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284717509] [2021-11-07 01:57:52,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:57:52,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:52,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:57:52,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:57:52,074 INFO L87 Difference]: Start difference. First operand 52928 states and 95248 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 01:57:56,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:56,582 INFO L93 Difference]: Finished difference Result 55435 states and 99236 transitions. [2021-11-07 01:57:56,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:57:56,583 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-11-07 01:57:56,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:56,674 INFO L225 Difference]: With dead ends: 55435 [2021-11-07 01:57:56,674 INFO L226 Difference]: Without dead ends: 53622 [2021-11-07 01:57:56,684 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 440 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 01:57:56,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53622 states. [2021-11-07 01:58:01,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53622 to 52459. [2021-11-07 01:58:01,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52459 states, 52456 states have (on average 1.801662345584871) internal successors, (94508), 52458 states have internal predecessors, (94508), 0 states have call successors, (0), 0 states 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 01:58:01,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52459 states to 52459 states and 94508 transitions. [2021-11-07 01:58:01,800 INFO L78 Accepts]: Start accepts. Automaton has 52459 states and 94508 transitions. Word has length 113 [2021-11-07 01:58:01,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:01,801 INFO L470 AbstractCegarLoop]: Abstraction has 52459 states and 94508 transitions. [2021-11-07 01:58:01,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 01:58:01,801 INFO L276 IsEmpty]: Start isEmpty. Operand 52459 states and 94508 transitions. [2021-11-07 01:58:01,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-07 01:58:01,856 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:01,856 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:58:01,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:02,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:02,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:58:02,257 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:58:02,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:02,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1884254286, now seen corresponding path program 1 times [2021-11-07 01:58:02,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:02,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [930940011] [2021-11-07 01:58:02,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:02,258 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:02,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:02,260 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:02,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-07 01:58:04,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:04,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:58:04,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:04,843 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 01:58:04,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:05,214 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 01:58:05,214 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:05,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [930940011] [2021-11-07 01:58:05,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [930940011] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:58:05,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [927530744] [2021-11-07 01:58:05,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:05,215 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:58:05,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:58:05,218 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:58:05,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca9b4b6b-ca6d-40b2-8aa5-826f0d27d732/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2021-11-07 01:58:07,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:07,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 01:58:07,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:08,675 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 01:58:08,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:09,282 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 01:58:09,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [927530744] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:09,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:58:09,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 24 [2021-11-07 01:58:09,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548186024] [2021-11-07 01:58:09,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 01:58:09,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:09,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 01:58:09,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:58:09,285 INFO L87 Difference]: Start difference. First operand 52459 states and 94508 transitions. Second operand has 18 states, 18 states have (on average 10.333333333333334) internal successors, (186), 17 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)