./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/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_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/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_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/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 1fcf2e3f406244358dbdc63025b5201d61a26c4305d0f5c4a6ff65bb76c78282 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:44:22,109 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:44:22,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:44:22,180 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:44:22,180 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:44:22,186 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:44:22,187 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:44:22,192 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:44:22,195 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:44:22,202 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:44:22,203 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:44:22,205 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:44:22,206 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:44:22,209 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:44:22,211 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:44:22,215 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:44:22,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:44:22,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:44:22,221 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:44:22,229 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:44:22,231 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:44:22,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:44:22,236 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:44:22,237 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:44:22,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:44:22,242 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:44:22,242 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:44:22,244 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:44:22,245 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:44:22,246 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:44:22,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:44:22,248 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:44:22,250 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:44:22,251 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:44:22,253 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:44:22,253 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:44:22,254 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:44:22,254 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:44:22,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:44:22,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:44:22,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:44:22,257 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:44:22,303 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:44:22,303 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:44:22,305 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:44:22,305 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:44:22,305 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:44:22,305 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:44:22,306 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:44:22,306 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:44:22,306 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:44:22,306 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:44:22,313 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:44:22,314 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:44:22,314 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:44:22,314 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:44:22,314 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:44:22,315 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:44:22,315 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:44:22,315 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:44:22,315 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:44:22,316 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:44:22,316 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:44:22,316 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:44:22,316 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:44:22,316 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:44:22,317 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:44:22,317 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:44:22,317 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:44:22,317 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:44:22,317 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:44:22,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:44:22,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:44:22,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:44:22,320 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:44:22,321 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:44:22,321 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:44:22,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:44:22,321 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:44:22,321 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:44:22,322 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:44:22,322 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_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fcf2e3f406244358dbdc63025b5201d61a26c4305d0f5c4a6ff65bb76c78282 [2021-11-07 01:44:22,664 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:44:22,688 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:44:22,691 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:44:22,693 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:44:22,694 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:44:22,695 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c [2021-11-07 01:44:22,779 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/data/eea1ded20/e24ccc650e6a4087ab740b327ff4b52f/FLAG9dde7b2d8 [2021-11-07 01:44:23,441 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:44:23,442 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c [2021-11-07 01:44:23,467 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/data/eea1ded20/e24ccc650e6a4087ab740b327ff4b52f/FLAG9dde7b2d8 [2021-11-07 01:44:23,656 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/data/eea1ded20/e24ccc650e6a4087ab740b327ff4b52f [2021-11-07 01:44:23,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:44:23,661 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:44:23,682 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:44:23,682 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:44:23,687 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:44:23,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:23" (1/1) ... [2021-11-07 01:44:23,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@518a1a1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:23, skipping insertion in model container [2021-11-07 01:44:23,704 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:23" (1/1) ... [2021-11-07 01:44:23,714 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:44:23,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:44:24,422 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_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c[78520,78533] [2021-11-07 01:44:24,433 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:44:24,451 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 01:44:24,452 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@27532395 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:24, skipping insertion in model container [2021-11-07 01:44:24,452 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:44:24,453 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:44:24,455 INFO L168 Benchmark]: Toolchain (without parser) took 793.10 ms. Allocated memory is still 134.2 MB. Free memory was 92.9 MB in the beginning and 99.2 MB in the end (delta: -6.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:44:24,456 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 134.2 MB. Free memory is still 112.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:44:24,457 INFO L168 Benchmark]: CACSL2BoogieTranslator took 771.04 ms. Allocated memory is still 134.2 MB. Free memory was 92.6 MB in the beginning and 99.2 MB in the end (delta: -6.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:44:24,459 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 134.2 MB. Free memory is still 112.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 771.04 ms. Allocated memory is still 134.2 MB. Free memory was 92.6 MB in the beginning and 99.2 MB in the end (delta: -6.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1050]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/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_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/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_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/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 1fcf2e3f406244358dbdc63025b5201d61a26c4305d0f5c4a6ff65bb76c78282 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:44:26,935 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:44:26,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:44:27,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:44:27,008 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:44:27,013 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:44:27,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:44:27,020 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:44:27,024 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:44:27,032 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:44:27,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:44:27,036 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:44:27,037 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:44:27,039 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:44:27,042 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:44:27,047 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:44:27,049 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:44:27,050 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:44:27,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:44:27,062 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:44:27,065 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:44:27,066 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:44:27,069 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:44:27,072 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:44:27,081 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:44:27,082 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:44:27,082 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:44:27,084 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:44:27,085 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:44:27,086 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:44:27,087 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:44:27,088 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:44:27,090 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:44:27,091 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:44:27,093 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:44:27,093 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:44:27,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:44:27,095 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:44:27,095 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:44:27,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:44:27,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:44:27,099 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:44:27,145 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:44:27,146 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:44:27,147 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:44:27,148 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:44:27,148 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:44:27,148 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:44:27,149 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:44:27,149 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:44:27,149 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:44:27,151 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:44:27,152 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:44:27,152 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:44:27,153 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:44:27,153 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:44:27,153 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:44:27,153 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:44:27,153 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:44:27,154 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:44:27,154 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:44:27,155 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:44:27,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:44:27,155 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:44:27,155 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:44:27,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:44:27,156 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:44:27,156 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:44:27,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:44:27,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:44:27,157 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:44:27,157 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:44:27,157 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:44:27,158 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:27,158 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:44:27,158 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:44:27,159 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:44:27,159 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_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fcf2e3f406244358dbdc63025b5201d61a26c4305d0f5c4a6ff65bb76c78282 [2021-11-07 01:44:27,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:44:27,585 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:44:27,588 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:44:27,590 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:44:27,591 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:44:27,594 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c [2021-11-07 01:44:27,680 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/data/0ae1f5205/e6be29e5c2fb40f58ca6f6cac17182ea/FLAG55138bc50 [2021-11-07 01:44:28,528 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:44:28,529 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c [2021-11-07 01:44:28,567 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/data/0ae1f5205/e6be29e5c2fb40f58ca6f6cac17182ea/FLAG55138bc50 [2021-11-07 01:44:28,682 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/data/0ae1f5205/e6be29e5c2fb40f58ca6f6cac17182ea [2021-11-07 01:44:28,686 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:44:28,693 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:44:28,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:44:28,712 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:44:28,716 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:44:28,717 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:28" (1/1) ... [2021-11-07 01:44:28,718 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1764b454 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:28, skipping insertion in model container [2021-11-07 01:44:28,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:28" (1/1) ... [2021-11-07 01:44:28,728 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:44:28,899 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:44:29,910 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_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c[78520,78533] [2021-11-07 01:44:29,948 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:44:29,991 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:44:30,033 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:44:30,307 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_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c[78520,78533] [2021-11-07 01:44:30,314 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:44:30,333 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:44:30,547 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_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/sv-benchmarks/c/openssl/s3_srvr.blast.06.i.cil-1.c[78520,78533] [2021-11-07 01:44:30,550 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:44:30,577 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:44:30,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:30 WrapperNode [2021-11-07 01:44:30,578 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:44:30,580 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:44:30,580 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:44:30,580 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:44:30,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:30" (1/1) ... [2021-11-07 01:44:30,632 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:30" (1/1) ... [2021-11-07 01:44:30,699 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:44:30,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:44:30,710 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:44:30,710 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:44:30,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:30" (1/1) ... [2021-11-07 01:44:30,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:30" (1/1) ... [2021-11-07 01:44:30,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:30" (1/1) ... [2021-11-07 01:44:30,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:30" (1/1) ... [2021-11-07 01:44:30,789 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:30" (1/1) ... [2021-11-07 01:44:30,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:30" (1/1) ... [2021-11-07 01:44:30,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:30" (1/1) ... [2021-11-07 01:44:30,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:44:30,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:44:30,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:44:30,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:44:30,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:30" (1/1) ... [2021-11-07 01:44:30,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:44:30,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:44:30,890 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:44:30,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:44:30,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:44:30,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:44:30,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:44:30,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:44:30,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:44:30,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:44:30,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:44:30,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:44:30,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:44:31,144 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-07 01:44:40,940 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-07 01:44:40,940 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-07 01:44:40,949 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:44:40,950 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-07 01:44:40,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:44:40 BoogieIcfgContainer [2021-11-07 01:44:40,952 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:44:40,954 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:44:40,954 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:44:40,957 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:44:40,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:44:28" (1/3) ... [2021-11-07 01:44:40,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc902dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:44:40, skipping insertion in model container [2021-11-07 01:44:40,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:30" (2/3) ... [2021-11-07 01:44:40,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc902dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:44:40, skipping insertion in model container [2021-11-07 01:44:40,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:44:40" (3/3) ... [2021-11-07 01:44:40,960 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.06.i.cil-1.c [2021-11-07 01:44:40,966 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:44:40,966 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:44:41,015 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:44:41,021 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 01:44:41,022 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:44:41,041 INFO L276 IsEmpty]: Start isEmpty. Operand has 161 states, 159 states have (on average 1.7358490566037736) internal successors, (276), 160 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:41,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 01:44:41,050 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:41,051 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 01:44:41,052 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:44:41,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:41,058 INFO L85 PathProgramCache]: Analyzing trace with hash -2069453275, now seen corresponding path program 1 times [2021-11-07 01:44:41,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:41,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1188892707] [2021-11-07 01:44:41,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:41,105 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:41,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:41,108 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:41,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:44:41,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:41,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 01:44:41,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:41,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:44:41,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:44:41,887 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:41,890 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-07 01:44:41,900 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:41,903 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-07 01:44:41,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 319 [2021-11-07 01:44:42,451 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-07 01:44:42,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 8 case distinctions, treesize of input 717 treesize of output 669 [2021-11-07 01:44:42,571 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:42,574 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-07 01:44:42,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 210 [2021-11-07 01:44:42,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,724 INFO L244 Elim1Store]: Index analysis took 104 ms [2021-11-07 01:44:42,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 101 [2021-11-07 01:44:42,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 13 [2021-11-07 01:44:42,943 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-07 01:44:42,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 13 [2021-11-07 01:44:42,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:42,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 13 [2021-11-07 01:44:43,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-07 01:44:43,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-07 01:44:43,234 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 01:44:43,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:43,498 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:43,501 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-07 01:44:43,507 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:43,509 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-07 01:44:43,670 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:43,672 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-07 01:44:43,681 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:43,684 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-07 01:44:43,695 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:43,699 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-07 01:44:43,715 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:43,718 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-07 01:44:43,749 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:43,753 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-07 01:44:43,783 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:43,788 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-07 01:44:44,392 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 01:44:44,393 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:44,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1188892707] [2021-11-07 01:44:44,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1188892707] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:44,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:44,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:44:44,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154378809] [2021-11-07 01:44:44,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:44:44,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:44,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:44:44,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:44:44,422 INFO L87 Difference]: Start difference. First operand has 161 states, 159 states have (on average 1.7358490566037736) internal successors, (276), 160 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:18,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:18,250 INFO L93 Difference]: Finished difference Result 323 states and 551 transitions. [2021-11-07 01:45:18,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:45:18,268 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-07 01:45:18,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:18,327 INFO L225 Difference]: With dead ends: 323 [2021-11-07 01:45:18,327 INFO L226 Difference]: Without dead ends: 148 [2021-11-07 01:45:18,353 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:45:18,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-07 01:45:18,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-11-07 01:45:18,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5714285714285714) internal successors, (231), 147 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:18,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 231 transitions. [2021-11-07 01:45:18,489 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 231 transitions. Word has length 46 [2021-11-07 01:45:18,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:18,490 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 231 transitions. [2021-11-07 01:45:18,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:18,502 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 231 transitions. [2021-11-07 01:45:18,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 01:45:18,512 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:18,513 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 01:45:18,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:18,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:18,731 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:45:18,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:18,732 INFO L85 PathProgramCache]: Analyzing trace with hash 176126179, now seen corresponding path program 1 times [2021-11-07 01:45:18,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:18,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [962909527] [2021-11-07 01:45:18,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:18,734 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:18,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:18,753 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:18,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:45:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:19,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:45:19,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:19,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:45:19,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:45:19,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:45:19,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:45:19,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:45:19,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:45:20,417 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:45:20,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:45:24,142 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:45:24,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:45:32,581 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:45:32,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:45:32,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:32,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:41,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:41,126 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:41,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [962909527] [2021-11-07 01:45:41,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [962909527] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:41,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:41,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 6 [2021-11-07 01:45:41,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101462499] [2021-11-07 01:45:41,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:45:41,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:41,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:45:41,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=15, Unknown=3, NotChecked=0, Total=30 [2021-11-07 01:45:41,132 INFO L87 Difference]: Start difference. First operand 148 states and 231 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:11,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:11,043 INFO L93 Difference]: Finished difference Result 314 states and 490 transitions. [2021-11-07 01:46:11,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:46:11,047 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-07 01:46:11,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:11,050 INFO L225 Difference]: With dead ends: 314 [2021-11-07 01:46:11,050 INFO L226 Difference]: Without dead ends: 176 [2021-11-07 01:46:11,052 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=18, Invalid=21, Unknown=3, NotChecked=0, Total=42 [2021-11-07 01:46:11,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-07 01:46:11,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 159. [2021-11-07 01:46:11,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.5822784810126582) internal successors, (250), 158 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:11,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 250 transitions. [2021-11-07 01:46:11,093 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 250 transitions. Word has length 46 [2021-11-07 01:46:11,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:11,094 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 250 transitions. [2021-11-07 01:46:11,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:11,095 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 250 transitions. [2021-11-07 01:46:11,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:46:11,103 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:11,103 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:11,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:11,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:11,321 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:46:11,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:11,322 INFO L85 PathProgramCache]: Analyzing trace with hash 755663040, now seen corresponding path program 1 times [2021-11-07 01:46:11,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:11,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572576820] [2021-11-07 01:46:11,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:11,324 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:11,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:11,338 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:11,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:46:11,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:11,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:46:11,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:11,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:11,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:11,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:11,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:11,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:11,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:46:12,365 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:46:12,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:46:15,953 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:46:15,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:46:23,715 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:46:23,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:46:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:23,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:24,319 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:24,320 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:24,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [572576820] [2021-11-07 01:46:24,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [572576820] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:24,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:24,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:46:24,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138667715] [2021-11-07 01:46:24,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:46:24,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:24,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:46:24,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:46:24,324 INFO L87 Difference]: Start difference. First operand 159 states and 250 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:11,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:11,333 INFO L93 Difference]: Finished difference Result 441 states and 691 transitions. [2021-11-07 01:47:11,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:47:11,335 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-07 01:47:11,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:11,339 INFO L225 Difference]: With dead ends: 441 [2021-11-07 01:47:11,339 INFO L226 Difference]: Without dead ends: 303 [2021-11-07 01:47:11,341 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:47:11,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-07 01:47:11,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 175. [2021-11-07 01:47:11,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.5804597701149425) internal successors, (275), 174 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:11,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 275 transitions. [2021-11-07 01:47:11,362 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 275 transitions. Word has length 59 [2021-11-07 01:47:11,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:11,363 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 275 transitions. [2021-11-07 01:47:11,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:11,363 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 275 transitions. [2021-11-07 01:47:11,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:47:11,366 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:11,366 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:47:11,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:11,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:11,585 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:47:11,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:11,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1854767371, now seen corresponding path program 1 times [2021-11-07 01:47:11,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:11,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2128320126] [2021-11-07 01:47:11,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:11,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:11,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:11,591 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:11,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:47:12,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:12,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:47:12,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:12,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:47:12,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:47:12,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:47:12,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:47:12,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:47:12,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:47:13,233 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:47:13,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:47:16,770 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:47:16,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:47:23,651 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:47:23,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:47:23,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:23,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:24,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:24,277 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:24,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2128320126] [2021-11-07 01:47:24,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2128320126] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:24,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:47:24,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:47:24,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209513257] [2021-11-07 01:47:24,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:47:24,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:24,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:47:24,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:47:24,283 INFO L87 Difference]: Start difference. First operand 175 states and 275 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:11,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:11,036 INFO L93 Difference]: Finished difference Result 487 states and 765 transitions. [2021-11-07 01:48:11,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:48:11,038 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 01:48:11,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:11,040 INFO L225 Difference]: With dead ends: 487 [2021-11-07 01:48:11,040 INFO L226 Difference]: Without dead ends: 333 [2021-11-07 01:48:11,041 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:48:11,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-11-07 01:48:11,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 194. [2021-11-07 01:48:11,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.5544041450777202) internal successors, (300), 193 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:11,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 300 transitions. [2021-11-07 01:48:11,060 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 300 transitions. Word has length 60 [2021-11-07 01:48:11,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:11,061 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 300 transitions. [2021-11-07 01:48:11,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:11,062 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 300 transitions. [2021-11-07 01:48:11,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:48:11,064 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:11,065 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:11,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:11,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:11,283 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:48:11,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:11,283 INFO L85 PathProgramCache]: Analyzing trace with hash 219231991, now seen corresponding path program 1 times [2021-11-07 01:48:11,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:11,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2117609789] [2021-11-07 01:48:11,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:11,289 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:11,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:11,291 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:11,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:48:12,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:12,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:48:12,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:12,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:48:12,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:48:12,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:48:12,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:48:12,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:48:12,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:48:13,274 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:48:13,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:48:17,111 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:48:17,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:48:24,142 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:48:24,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:48:24,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:24,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:24,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:24,810 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:24,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2117609789] [2021-11-07 01:48:24,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2117609789] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:24,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:24,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:48:24,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095537837] [2021-11-07 01:48:24,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:48:24,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:24,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:48:24,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:48:24,813 INFO L87 Difference]: Start difference. First operand 194 states and 300 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:01,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:01,731 INFO L93 Difference]: Finished difference Result 505 states and 784 transitions. [2021-11-07 01:49:01,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:49:01,733 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 01:49:01,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:01,737 INFO L225 Difference]: With dead ends: 505 [2021-11-07 01:49:01,737 INFO L226 Difference]: Without dead ends: 340 [2021-11-07 01:49:01,738 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:49:01,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-11-07 01:49:01,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 218. [2021-11-07 01:49:01,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.5391705069124424) internal successors, (334), 217 states have internal predecessors, (334), 0 states have call successors, (0), 0 states 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 01:49:01,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 334 transitions. [2021-11-07 01:49:01,769 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 334 transitions. Word has length 60 [2021-11-07 01:49:01,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:01,769 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 334 transitions. [2021-11-07 01:49:01,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:01,770 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 334 transitions. [2021-11-07 01:49:01,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:49:01,772 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:01,772 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:01,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:01,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:01,979 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:49:01,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:01,980 INFO L85 PathProgramCache]: Analyzing trace with hash -426584320, now seen corresponding path program 1 times [2021-11-07 01:49:01,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:01,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [961809925] [2021-11-07 01:49:01,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:01,981 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:01,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:01,982 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:01,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:49:02,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:02,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:49:02,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:02,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:49:02,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:49:02,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:49:02,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:49:02,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:49:02,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:49:03,174 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:49:03,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:49:07,262 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:49:07,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:49:15,288 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:49:15,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:49:15,443 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:15,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:15,795 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:15,795 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:15,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [961809925] [2021-11-07 01:49:15,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [961809925] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:15,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:15,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:49:15,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027812935] [2021-11-07 01:49:15,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:49:15,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:15,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:49:15,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:49:15,798 INFO L87 Difference]: Start difference. First operand 218 states and 334 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:16,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:16,065 INFO L93 Difference]: Finished difference Result 544 states and 842 transitions. [2021-11-07 01:50:16,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:50:16,067 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 01:50:16,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:16,070 INFO L225 Difference]: With dead ends: 544 [2021-11-07 01:50:16,070 INFO L226 Difference]: Without dead ends: 355 [2021-11-07 01:50:16,071 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:50:16,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-11-07 01:50:16,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 231. [2021-11-07 01:50:16,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.5478260869565217) internal successors, (356), 230 states have internal predecessors, (356), 0 states have call successors, (0), 0 states 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 01:50:16,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 356 transitions. [2021-11-07 01:50:16,087 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 356 transitions. Word has length 60 [2021-11-07 01:50:16,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:16,088 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 356 transitions. [2021-11-07 01:50:16,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:16,088 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 356 transitions. [2021-11-07 01:50:16,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:50:16,090 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:16,090 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:50:16,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:16,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:16,312 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:50:16,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:16,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1898096192, now seen corresponding path program 1 times [2021-11-07 01:50:16,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:16,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89961273] [2021-11-07 01:50:16,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:16,315 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:16,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:16,316 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:16,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:50:17,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:17,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:50:17,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:17,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:17,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:17,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:17,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:17,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:17,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:50:18,429 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:50:18,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:50:22,460 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:50:22,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:50:30,176 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:50:30,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:50:30,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:30,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:30,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:30,772 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:30,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89961273] [2021-11-07 01:50:30,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89961273] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:30,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:30,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:50:30,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106883446] [2021-11-07 01:50:30,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:50:30,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:30,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:50:30,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:50:30,775 INFO L87 Difference]: Start difference. First operand 231 states and 356 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:11,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:51:11,665 INFO L93 Difference]: Finished difference Result 586 states and 910 transitions. [2021-11-07 01:51:11,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:51:11,667 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 01:51:11,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:51:11,671 INFO L225 Difference]: With dead ends: 586 [2021-11-07 01:51:11,671 INFO L226 Difference]: Without dead ends: 391 [2021-11-07 01:51:11,672 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:51:11,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-11-07 01:51:11,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 265. [2021-11-07 01:51:11,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.5454545454545454) internal successors, (408), 264 states have internal predecessors, (408), 0 states have call successors, (0), 0 states 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 01:51:11,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 408 transitions. [2021-11-07 01:51:11,738 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 408 transitions. Word has length 60 [2021-11-07 01:51:11,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:51:11,738 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 408 transitions. [2021-11-07 01:51:11,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:11,739 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 408 transitions. [2021-11-07 01:51:11,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:51:11,740 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:51:11,756 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:51:11,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:51:11,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:51:11,976 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:51:11,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:51:11,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1895442121, now seen corresponding path program 1 times [2021-11-07 01:51:11,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:51:11,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1879139166] [2021-11-07 01:51:11,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:51:11,978 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:51:11,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:51:11,986 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:51:12,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:51:12,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:13,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:51:13,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:13,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:51:13,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:13,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:51:13,756 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:51:13,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1879139166] [2021-11-07 01:51:13,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1879139166] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:51:13,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:51:13,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:51:13,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911176664] [2021-11-07 01:51:13,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:51:13,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:51:13,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:51:13,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:51:13,761 INFO L87 Difference]: Start difference. First operand 265 states and 408 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:13,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:51:13,904 INFO L93 Difference]: Finished difference Result 939 states and 1458 transitions. [2021-11-07 01:51:13,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:51:13,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 01:51:13,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:51:13,913 INFO L225 Difference]: With dead ends: 939 [2021-11-07 01:51:13,913 INFO L226 Difference]: Without dead ends: 710 [2021-11-07 01:51:13,929 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:51:13,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-11-07 01:51:13,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 486. [2021-11-07 01:51:13,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 1.5360824742268042) internal successors, (745), 485 states have internal predecessors, (745), 0 states have call successors, (0), 0 states 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 01:51:13,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 745 transitions. [2021-11-07 01:51:13,991 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 745 transitions. Word has length 60 [2021-11-07 01:51:13,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:51:13,993 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 745 transitions. [2021-11-07 01:51:13,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:13,994 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 745 transitions. [2021-11-07 01:51:13,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:51:13,996 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:51:13,997 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:51:14,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:51:14,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:51:14,217 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:51:14,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:51:14,218 INFO L85 PathProgramCache]: Analyzing trace with hash -471252473, now seen corresponding path program 1 times [2021-11-07 01:51:14,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:51:14,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2027109658] [2021-11-07 01:51:14,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:51:14,219 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:51:14,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:51:14,231 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:51:14,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:51:15,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:15,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:51:15,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:15,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:15,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:15,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:15,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:15,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:15,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:51:16,408 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:51:16,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:51:20,059 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:51:20,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:51:26,816 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:51:26,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:51:26,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:51:26,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:27,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:51:27,341 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:51:27,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2027109658] [2021-11-07 01:51:27,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2027109658] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:51:27,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:51:27,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:51:27,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787672106] [2021-11-07 01:51:27,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:51:27,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:51:27,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:51:27,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:51:27,344 INFO L87 Difference]: Start difference. First operand 486 states and 745 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:20,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:20,625 INFO L93 Difference]: Finished difference Result 1192 states and 1838 transitions. [2021-11-07 01:52:20,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:52:20,627 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 01:52:20,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:20,633 INFO L225 Difference]: With dead ends: 1192 [2021-11-07 01:52:20,633 INFO L226 Difference]: Without dead ends: 743 [2021-11-07 01:52:20,634 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:52:20,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2021-11-07 01:52:20,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 486. [2021-11-07 01:52:20,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 1.5298969072164947) internal successors, (742), 485 states have internal predecessors, (742), 0 states have call successors, (0), 0 states 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 01:52:20,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 742 transitions. [2021-11-07 01:52:20,669 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 742 transitions. Word has length 60 [2021-11-07 01:52:20,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:20,670 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 742 transitions. [2021-11-07 01:52:20,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:20,670 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 742 transitions. [2021-11-07 01:52:20,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:52:20,672 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:20,672 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:52:20,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:20,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:20,893 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:52:20,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:20,893 INFO L85 PathProgramCache]: Analyzing trace with hash -385909570, now seen corresponding path program 1 times [2021-11-07 01:52:20,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:20,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1219311627] [2021-11-07 01:52:20,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:20,895 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:20,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:20,896 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:20,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:52:21,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:21,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:52:21,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:21,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:52:21,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:52:21,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:52:21,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:52:21,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:52:21,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:52:22,298 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:52:22,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:52:25,712 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:52:25,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:52:33,334 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:52:33,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:52:33,507 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:33,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:33,899 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:33,900 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:33,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1219311627] [2021-11-07 01:52:33,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1219311627] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:33,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:52:33,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:52:33,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592592692] [2021-11-07 01:52:33,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:52:33,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:33,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:52:33,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:52:33,903 INFO L87 Difference]: Start difference. First operand 486 states and 742 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:31,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:31,047 INFO L93 Difference]: Finished difference Result 1177 states and 1810 transitions. [2021-11-07 01:53:31,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:53:31,048 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 01:53:31,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:31,054 INFO L225 Difference]: With dead ends: 1177 [2021-11-07 01:53:31,055 INFO L226 Difference]: Without dead ends: 728 [2021-11-07 01:53:31,056 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:53:31,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-11-07 01:53:31,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 476. [2021-11-07 01:53:31,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 1.5221052631578946) internal successors, (723), 475 states have internal predecessors, (723), 0 states have call successors, (0), 0 states 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 01:53:31,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 723 transitions. [2021-11-07 01:53:31,101 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 723 transitions. Word has length 60 [2021-11-07 01:53:31,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:31,101 INFO L470 AbstractCegarLoop]: Abstraction has 476 states and 723 transitions. [2021-11-07 01:53:31,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:31,102 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 723 transitions. [2021-11-07 01:53:31,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:53:31,104 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:31,104 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:53:31,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:31,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:53:31,329 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:53:31,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:31,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1920769353, now seen corresponding path program 1 times [2021-11-07 01:53:31,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:31,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [416202972] [2021-11-07 01:53:31,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:31,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:31,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:31,339 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:31,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:53:32,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:32,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:53:32,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:32,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:32,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:32,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:32,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:32,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:32,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:53:33,675 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:53:33,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:53:37,192 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:53:37,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:53:44,279 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:53:44,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:53:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:44,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:44,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:44,844 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:44,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [416202972] [2021-11-07 01:53:44,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [416202972] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:44,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:53:44,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:53:44,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014932919] [2021-11-07 01:53:44,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:53:44,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:44,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:53:44,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:53:44,848 INFO L87 Difference]: Start difference. First operand 476 states and 723 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:22,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:22,193 INFO L93 Difference]: Finished difference Result 1170 states and 1790 transitions. [2021-11-07 01:54:22,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:54:22,195 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 01:54:22,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:22,200 INFO L225 Difference]: With dead ends: 1170 [2021-11-07 01:54:22,200 INFO L226 Difference]: Without dead ends: 731 [2021-11-07 01:54:22,201 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:54:22,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-11-07 01:54:22,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 513. [2021-11-07 01:54:22,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 1.5078125) internal successors, (772), 512 states have internal predecessors, (772), 0 states have call successors, (0), 0 states 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 01:54:22,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 772 transitions. [2021-11-07 01:54:22,235 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 772 transitions. Word has length 61 [2021-11-07 01:54:22,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:22,236 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 772 transitions. [2021-11-07 01:54:22,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:22,237 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 772 transitions. [2021-11-07 01:54:22,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:54:22,238 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:22,239 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:54:22,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:22,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:22,452 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:54:22,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:22,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1011603538, now seen corresponding path program 1 times [2021-11-07 01:54:22,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:22,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881929996] [2021-11-07 01:54:22,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:22,454 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:22,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:22,456 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:22,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:54:23,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:23,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:54:23,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:23,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:54:23,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:54:23,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:54:23,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:54:23,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:54:23,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:54:24,095 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:54:24,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:54:27,545 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:54:27,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:54:34,713 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:54:34,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:54:34,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:54:34,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:35,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:54:35,245 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:35,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881929996] [2021-11-07 01:54:35,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881929996] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:35,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:35,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:54:35,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857262818] [2021-11-07 01:54:35,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:54:35,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:35,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:54:35,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:54:35,248 INFO L87 Difference]: Start difference. First operand 513 states and 772 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:11,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:11,191 INFO L93 Difference]: Finished difference Result 1244 states and 1884 transitions. [2021-11-07 01:55:11,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:55:11,194 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 01:55:11,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:11,199 INFO L225 Difference]: With dead ends: 1244 [2021-11-07 01:55:11,199 INFO L226 Difference]: Without dead ends: 768 [2021-11-07 01:55:11,200 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:55:11,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2021-11-07 01:55:11,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 566. [2021-11-07 01:55:11,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 565 states have (on average 1.479646017699115) internal successors, (836), 565 states have internal predecessors, (836), 0 states have call successors, (0), 0 states 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 01:55:11,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 836 transitions. [2021-11-07 01:55:11,245 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 836 transitions. Word has length 62 [2021-11-07 01:55:11,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:11,245 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 836 transitions. [2021-11-07 01:55:11,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:11,246 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 836 transitions. [2021-11-07 01:55:11,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:55:11,248 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:11,248 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:55:11,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:11,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:11,465 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:55:11,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:11,465 INFO L85 PathProgramCache]: Analyzing trace with hash -2021179534, now seen corresponding path program 1 times [2021-11-07 01:55:11,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:11,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2009514927] [2021-11-07 01:55:11,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:11,466 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:11,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:11,467 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:11,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:55:12,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:12,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:55:12,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:12,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:55:12,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:55:12,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:55:12,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:55:12,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:55:12,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:55:13,054 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:55:13,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:55:16,305 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:55:16,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:55:23,383 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:55:23,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:55:23,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:23,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:23,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:23,838 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:23,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2009514927] [2021-11-07 01:55:23,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2009514927] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:23,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:23,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:55:23,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684345460] [2021-11-07 01:55:23,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:55:23,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:23,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:55:23,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:55:23,841 INFO L87 Difference]: Start difference. First operand 566 states and 836 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:11,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:11,786 INFO L93 Difference]: Finished difference Result 1312 states and 1970 transitions. [2021-11-07 01:56:11,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:56:11,788 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 01:56:11,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:11,793 INFO L225 Difference]: With dead ends: 1312 [2021-11-07 01:56:11,793 INFO L226 Difference]: Without dead ends: 783 [2021-11-07 01:56:11,794 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:56:11,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2021-11-07 01:56:11,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 562. [2021-11-07 01:56:11,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 561 states have (on average 1.4581105169340463) internal successors, (818), 561 states have internal predecessors, (818), 0 states have call successors, (0), 0 states 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 01:56:11,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 818 transitions. [2021-11-07 01:56:11,833 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 818 transitions. Word has length 63 [2021-11-07 01:56:11,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:11,834 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 818 transitions. [2021-11-07 01:56:11,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:11,834 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 818 transitions. [2021-11-07 01:56:11,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:56:11,836 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:11,836 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:56:11,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 01:56:12,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:56:12,055 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:56:12,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:12,056 INFO L85 PathProgramCache]: Analyzing trace with hash 485580554, now seen corresponding path program 1 times [2021-11-07 01:56:12,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:12,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [856585954] [2021-11-07 01:56:12,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:12,057 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:12,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:12,059 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:12,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:56:13,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:13,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:56:13,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:13,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:56:13,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:56:13,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:56:13,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:56:13,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:56:13,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:56:13,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:56:13,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:56:13,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:56:13,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:56:13,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:56:13,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:56:13,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:56:13,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:56:13,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:56:13,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:56:13,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:56:13,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:56:13,849 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:56:13,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 01:56:15,169 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:56:15,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-07 01:56:15,281 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 01:56:15,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:15,620 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 01:56:15,621 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:15,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [856585954] [2021-11-07 01:56:15,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [856585954] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:15,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:56:15,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:56:15,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667124204] [2021-11-07 01:56:15,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:56:15,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:15,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:56:15,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:56:15,623 INFO L87 Difference]: Start difference. First operand 562 states and 818 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:25,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:25,371 INFO L93 Difference]: Finished difference Result 1144 states and 1673 transitions. [2021-11-07 01:56:25,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:56:25,374 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 01:56:25,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:25,377 INFO L225 Difference]: With dead ends: 1144 [2021-11-07 01:56:25,377 INFO L226 Difference]: Without dead ends: 619 [2021-11-07 01:56:25,378 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:56:25,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-11-07 01:56:25,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 605. [2021-11-07 01:56:25,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 1.4486754966887416) internal successors, (875), 604 states have internal predecessors, (875), 0 states have call successors, (0), 0 states 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 01:56:25,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 875 transitions. [2021-11-07 01:56:25,418 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 875 transitions. Word has length 63 [2021-11-07 01:56:25,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:25,418 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 875 transitions. [2021-11-07 01:56:25,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:25,419 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 875 transitions. [2021-11-07 01:56:25,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 01:56:25,421 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:25,421 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:56:25,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:25,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:56:25,641 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:56:25,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:25,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1965557864, now seen corresponding path program 1 times [2021-11-07 01:56:25,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:25,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [561460666] [2021-11-07 01:56:25,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:25,643 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:25,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:25,644 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:25,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:56:26,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:26,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:56:26,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:26,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:56:26,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:56:26,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:56:26,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:56:26,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:56:26,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:56:27,079 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 01:56:27,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-07 01:56:27,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:56:27,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:56:27,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:56:27,525 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 01:56:27,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-07 01:56:30,159 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:56:30,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-07 01:56:30,203 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:56:30,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:30,679 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:56:30,679 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:30,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [561460666] [2021-11-07 01:56:30,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [561460666] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:30,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:56:30,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:56:30,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986064441] [2021-11-07 01:56:30,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:56:30,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:30,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:56:30,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:56:30,682 INFO L87 Difference]: Start difference. First operand 605 states and 875 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:02,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:02,444 INFO L93 Difference]: Finished difference Result 1654 states and 2444 transitions. [2021-11-07 01:57:02,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:57:02,446 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-07 01:57:02,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:02,450 INFO L225 Difference]: With dead ends: 1654 [2021-11-07 01:57:02,451 INFO L226 Difference]: Without dead ends: 1086 [2021-11-07 01:57:02,451 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:57:02,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-11-07 01:57:02,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 711. [2021-11-07 01:57:02,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 710 states have (on average 1.4690140845070423) internal successors, (1043), 710 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states 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 01:57:02,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 1043 transitions. [2021-11-07 01:57:02,494 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 1043 transitions. Word has length 85 [2021-11-07 01:57:02,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:02,495 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 1043 transitions. [2021-11-07 01:57:02,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:02,495 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 1043 transitions. [2021-11-07 01:57:02,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 01:57:02,497 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:02,497 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:02,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:02,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:02,718 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:57:02,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:02,718 INFO L85 PathProgramCache]: Analyzing trace with hash -660899661, now seen corresponding path program 1 times [2021-11-07 01:57:02,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:02,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [504019115] [2021-11-07 01:57:02,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:02,719 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:02,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:02,720 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:02,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:57:04,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:04,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:57:04,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:04,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:57:04,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:57:04,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:57:04,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:57:04,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:57:04,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:57:04,314 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 01:57:04,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-07 01:57:04,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:57:04,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:57:04,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:57:04,764 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 01:57:04,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-07 01:57:07,421 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:57:07,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-07 01:57:07,465 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:57:07,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:07,965 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:57:07,966 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:07,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [504019115] [2021-11-07 01:57:07,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [504019115] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:07,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:07,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:57:07,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451905259] [2021-11-07 01:57:07,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:57:07,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:07,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:57:07,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:57:07,968 INFO L87 Difference]: Start difference. First operand 711 states and 1043 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:47,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:47,317 INFO L93 Difference]: Finished difference Result 1784 states and 2665 transitions. [2021-11-07 01:57:47,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:57:47,319 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-07 01:57:47,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:47,325 INFO L225 Difference]: With dead ends: 1784 [2021-11-07 01:57:47,325 INFO L226 Difference]: Without dead ends: 1110 [2021-11-07 01:57:47,327 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:57:47,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-11-07 01:57:47,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 755. [2021-11-07 01:57:47,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 1.4973474801061009) internal successors, (1129), 754 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states 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 01:57:47,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1129 transitions. [2021-11-07 01:57:47,371 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1129 transitions. Word has length 86 [2021-11-07 01:57:47,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:47,372 INFO L470 AbstractCegarLoop]: Abstraction has 755 states and 1129 transitions. [2021-11-07 01:57:47,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:47,372 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1129 transitions. [2021-11-07 01:57:47,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-07 01:57:47,375 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:47,375 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:57:47,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:47,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:47,593 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:57:47,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:47,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1795100272, now seen corresponding path program 1 times [2021-11-07 01:57:47,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:47,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [208982947] [2021-11-07 01:57:47,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:47,595 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:47,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:47,597 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:47,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:57:49,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:49,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:57:49,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:49,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:57:49,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:57:49,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:57:49,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:57:49,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:57:49,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:57:49,519 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 01:57:49,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-07 01:57:49,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:57:49,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:57:49,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:57:49,892 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 01:57:49,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-07 01:57:51,927 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:57:51,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-07 01:57:52,054 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:57:52,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:52,497 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:57:52,497 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:52,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [208982947] [2021-11-07 01:57:52,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [208982947] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:52,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:52,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:57:52,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492293652] [2021-11-07 01:57:52,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:57:52,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:52,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:57:52,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:57:52,499 INFO L87 Difference]: Start difference. First operand 755 states and 1129 transitions. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:23,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:23,466 INFO L93 Difference]: Finished difference Result 1902 states and 2885 transitions. [2021-11-07 01:58:23,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:58:23,467 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2021-11-07 01:58:23,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:23,471 INFO L225 Difference]: With dead ends: 1902 [2021-11-07 01:58:23,472 INFO L226 Difference]: Without dead ends: 1184 [2021-11-07 01:58:23,473 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:58:23,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2021-11-07 01:58:23,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 841. [2021-11-07 01:58:23,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 1.513095238095238) internal successors, (1271), 840 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states 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 01:58:23,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1271 transitions. [2021-11-07 01:58:23,514 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1271 transitions. Word has length 114 [2021-11-07 01:58:23,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:23,515 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 1271 transitions. [2021-11-07 01:58:23,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:23,515 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1271 transitions. [2021-11-07 01:58:23,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-07 01:58:23,518 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:23,518 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:58:23,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-07 01:58:23,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:23,733 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:58:23,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:23,733 INFO L85 PathProgramCache]: Analyzing trace with hash -688905657, now seen corresponding path program 1 times [2021-11-07 01:58:23,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:23,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1348370517] [2021-11-07 01:58:23,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:23,735 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:23,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:23,736 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:23,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aa9c451-5332-4c4b-88aa-6968a8dab9ba/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:58:24,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:24,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:58:24,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:25,283 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:58:25,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:25,610 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:58:25,610 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:25,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1348370517] [2021-11-07 01:58:25,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1348370517] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:25,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:58:25,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:58:25,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613354697] [2021-11-07 01:58:25,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:58:25,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:25,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:58:25,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:58:25,612 INFO L87 Difference]: Start difference. First operand 841 states and 1271 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:26,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:26,393 INFO L93 Difference]: Finished difference Result 3174 states and 4841 transitions. [2021-11-07 01:58:26,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:58:26,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-11-07 01:58:26,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:26,402 INFO L225 Difference]: With dead ends: 3174 [2021-11-07 01:58:26,402 INFO L226 Difference]: Without dead ends: 2370 [2021-11-07 01:58:26,403 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:58:26,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2370 states.