./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec8_product30.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/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_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec8_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/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_17a536f0-3c8a-47e4-a7f6-2c934c771147/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 15275a4436f6ed835fc824ec788a3589ee34ef53cd98082c25cb994e481acd9a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:49:21,290 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:49:21,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:49:21,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:49:21,323 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:49:21,324 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:49:21,327 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:49:21,332 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:49:21,336 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:49:21,341 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:49:21,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:49:21,345 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:49:21,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:49:21,349 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:49:21,352 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:49:21,355 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:49:21,356 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:49:21,357 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:49:21,362 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:49:21,369 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:49:21,371 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:49:21,373 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:49:21,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:49:21,377 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:49:21,386 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:49:21,386 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:49:21,387 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:49:21,389 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:49:21,389 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:49:21,391 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:49:21,391 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:49:21,392 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:49:21,394 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:49:21,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:49:21,397 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:49:21,397 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:49:21,398 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:49:21,398 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:49:21,398 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:49:21,399 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:49:21,400 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:49:21,401 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:49:21,446 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:49:21,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:49:21,448 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:49:21,448 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:49:21,449 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:49:21,449 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:49:21,449 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:49:21,449 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:49:21,450 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:49:21,450 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:49:21,451 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:49:21,451 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:49:21,451 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:49:21,452 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:49:21,452 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:49:21,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:49:21,453 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:49:21,453 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:49:21,453 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:49:21,454 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:49:21,454 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:49:21,454 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:49:21,454 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:49:21,454 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:49:21,455 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:49:21,455 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:49:21,455 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:49:21,455 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:49:21,456 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:49:21,457 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:49:21,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:49:21,458 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:49:21,458 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:49:21,458 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:49:21,459 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:49:21,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:49:21,459 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:49:21,459 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:49:21,459 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:49:21,460 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_17a536f0-3c8a-47e4-a7f6-2c934c771147/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 15275a4436f6ed835fc824ec788a3589ee34ef53cd98082c25cb994e481acd9a [2021-11-07 01:49:21,775 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:49:21,805 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:49:21,809 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:49:21,810 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:49:21,811 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:49:21,812 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec8_product30.cil.c [2021-11-07 01:49:21,897 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/data/2e3aabce0/e9e7144acf24472b9cbe31f3ef1bbd1b/FLAG2df1fe2cb [2021-11-07 01:49:22,582 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:49:22,584 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/sv-benchmarks/c/product-lines/email_spec8_product30.cil.c [2021-11-07 01:49:22,609 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/data/2e3aabce0/e9e7144acf24472b9cbe31f3ef1bbd1b/FLAG2df1fe2cb [2021-11-07 01:49:22,792 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/data/2e3aabce0/e9e7144acf24472b9cbe31f3ef1bbd1b [2021-11-07 01:49:22,793 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:49:22,795 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:49:22,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:49:22,797 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:49:22,811 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:49:22,812 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:49:22" (1/1) ... [2021-11-07 01:49:22,813 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b0969f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:22, skipping insertion in model container [2021-11-07 01:49:22,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:49:22" (1/1) ... [2021-11-07 01:49:22,820 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:49:22,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:49:23,204 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_17a536f0-3c8a-47e4-a7f6-2c934c771147/sv-benchmarks/c/product-lines/email_spec8_product30.cil.c[7858,7871] [2021-11-07 01:49:23,499 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:49:23,512 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 01:49:23,513 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@22a86f75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:23, skipping insertion in model container [2021-11-07 01:49:23,513 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:49:23,513 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:49:23,516 INFO L168 Benchmark]: Toolchain (without parser) took 719.34 ms. Allocated memory was 83.9 MB in the beginning and 113.2 MB in the end (delta: 29.4 MB). Free memory was 41.9 MB in the beginning and 66.3 MB in the end (delta: -24.4 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. [2021-11-07 01:49:23,516 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 83.9 MB. Free memory is still 61.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:49:23,517 INFO L168 Benchmark]: CACSL2BoogieTranslator took 716.83 ms. Allocated memory was 83.9 MB in the beginning and 113.2 MB in the end (delta: 29.4 MB). Free memory was 41.7 MB in the beginning and 66.3 MB in the end (delta: -24.6 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. [2021-11-07 01:49:23,519 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 83.9 MB. Free memory is still 61.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 716.83 ms. Allocated memory was 83.9 MB in the beginning and 113.2 MB in the end (delta: 29.4 MB). Free memory was 41.7 MB in the beginning and 66.3 MB in the end (delta: -24.6 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 627]: 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_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/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_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec8_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/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_17a536f0-3c8a-47e4-a7f6-2c934c771147/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 15275a4436f6ed835fc824ec788a3589ee34ef53cd98082c25cb994e481acd9a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:49:25,749 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:49:25,751 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:49:25,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:49:25,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:49:25,786 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:49:25,788 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:49:25,790 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:49:25,793 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:49:25,794 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:49:25,795 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:49:25,796 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:49:25,797 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:49:25,798 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:49:25,800 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:49:25,801 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:49:25,802 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:49:25,804 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:49:25,806 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:49:25,808 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:49:25,810 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:49:25,817 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:49:25,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:49:25,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:49:25,824 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:49:25,824 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:49:25,824 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:49:25,826 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:49:25,826 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:49:25,827 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:49:25,828 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:49:25,833 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:49:25,835 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:49:25,836 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:49:25,840 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:49:25,840 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:49:25,841 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:49:25,841 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:49:25,841 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:49:25,843 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:49:25,844 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:49:25,845 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:49:25,896 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:49:25,897 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:49:25,897 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:49:25,898 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:49:25,898 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:49:25,898 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:49:25,898 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:49:25,898 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:49:25,899 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:49:25,899 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:49:25,900 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:49:25,900 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:49:25,900 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:49:25,900 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:49:25,900 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:49:25,900 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:49:25,903 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:49:25,903 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:49:25,903 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:49:25,903 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:49:25,904 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:49:25,904 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:49:25,904 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:49:25,905 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:49:25,905 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:49:25,905 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:49:25,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:49:25,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:49:25,906 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:49:25,906 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:49:25,907 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:49:25,907 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:49:25,907 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:49:25,907 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:49:25,908 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:49:25,908 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_17a536f0-3c8a-47e4-a7f6-2c934c771147/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 15275a4436f6ed835fc824ec788a3589ee34ef53cd98082c25cb994e481acd9a [2021-11-07 01:49:26,333 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:49:26,358 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:49:26,361 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:49:26,362 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:49:26,363 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:49:26,364 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec8_product30.cil.c [2021-11-07 01:49:26,440 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/data/d15b23aaa/9bfdbb3b73234390a14a47a4a075bc2c/FLAG42198c72d [2021-11-07 01:49:27,238 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:49:27,238 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/sv-benchmarks/c/product-lines/email_spec8_product30.cil.c [2021-11-07 01:49:27,260 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/data/d15b23aaa/9bfdbb3b73234390a14a47a4a075bc2c/FLAG42198c72d [2021-11-07 01:49:27,415 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/data/d15b23aaa/9bfdbb3b73234390a14a47a4a075bc2c [2021-11-07 01:49:27,417 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:49:27,419 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:49:27,421 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:49:27,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:49:27,424 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:49:27,425 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:49:27" (1/1) ... [2021-11-07 01:49:27,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fd6f3fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:27, skipping insertion in model container [2021-11-07 01:49:27,427 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:49:27" (1/1) ... [2021-11-07 01:49:27,444 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:49:27,519 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:49:27,810 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_17a536f0-3c8a-47e4-a7f6-2c934c771147/sv-benchmarks/c/product-lines/email_spec8_product30.cil.c[7858,7871] [2021-11-07 01:49:28,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:49:28,099 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:49:28,118 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:49:28,144 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_17a536f0-3c8a-47e4-a7f6-2c934c771147/sv-benchmarks/c/product-lines/email_spec8_product30.cil.c[7858,7871] [2021-11-07 01:49:28,295 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:49:28,303 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:49:28,332 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_17a536f0-3c8a-47e4-a7f6-2c934c771147/sv-benchmarks/c/product-lines/email_spec8_product30.cil.c[7858,7871] [2021-11-07 01:49:28,405 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:49:28,442 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:49:28,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:28 WrapperNode [2021-11-07 01:49:28,443 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:49:28,444 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:49:28,444 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:49:28,444 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:49:28,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:28" (1/1) ... [2021-11-07 01:49:28,483 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:28" (1/1) ... [2021-11-07 01:49:28,575 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:49:28,576 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:49:28,576 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:49:28,576 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:49:28,585 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:28" (1/1) ... [2021-11-07 01:49:28,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:28" (1/1) ... [2021-11-07 01:49:28,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:28" (1/1) ... [2021-11-07 01:49:28,594 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:28" (1/1) ... [2021-11-07 01:49:28,631 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:28" (1/1) ... [2021-11-07 01:49:28,649 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:28" (1/1) ... [2021-11-07 01:49:28,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:28" (1/1) ... [2021-11-07 01:49:28,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:49:28,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:49:28,682 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:49:28,682 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:49:28,683 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:28" (1/1) ... [2021-11-07 01:49:28,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:49:28,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:49:28,711 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:49:28,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:49:28,760 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:49:28,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:49:28,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:49:28,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:49:28,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:49:33,143 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:49:33,145 INFO L299 CfgBuilder]: Removed 323 assume(true) statements. [2021-11-07 01:49:33,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:49:33 BoogieIcfgContainer [2021-11-07 01:49:33,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:49:33,152 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:49:33,152 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:49:33,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:49:33,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:49:27" (1/3) ... [2021-11-07 01:49:33,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b6e31e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:49:33, skipping insertion in model container [2021-11-07 01:49:33,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:28" (2/3) ... [2021-11-07 01:49:33,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b6e31e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:49:33, skipping insertion in model container [2021-11-07 01:49:33,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:49:33" (3/3) ... [2021-11-07 01:49:33,159 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec8_product30.cil.c [2021-11-07 01:49:33,164 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:49:33,165 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 01:49:33,219 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:49:33,225 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 01:49:33,225 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 01:49:33,252 INFO L276 IsEmpty]: Start isEmpty. Operand has 505 states, 502 states have (on average 1.7569721115537849) internal successors, (882), 504 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:33,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:49:33,265 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:33,266 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:33,266 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:49:33,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:33,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1606635459, now seen corresponding path program 1 times [2021-11-07 01:49:33,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:33,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [169675642] [2021-11-07 01:49:33,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:33,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:33,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:33,291 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:33,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:49:33,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:33,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:49:33,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:33,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:33,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:34,093 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 01:49:34,094 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:34,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [169675642] [2021-11-07 01:49:34,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [169675642] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:34,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:34,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:49:34,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327737725] [2021-11-07 01:49:34,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:49:34,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:34,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:49:34,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:49:34,120 INFO L87 Difference]: Start difference. First operand has 505 states, 502 states have (on average 1.7569721115537849) internal successors, (882), 504 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:34,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:34,175 INFO L93 Difference]: Finished difference Result 768 states and 1323 transitions. [2021-11-07 01:49:34,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:49:34,177 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2021-11-07 01:49:34,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:34,192 INFO L225 Difference]: With dead ends: 768 [2021-11-07 01:49:34,193 INFO L226 Difference]: Without dead ends: 423 [2021-11-07 01:49:34,197 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:49:34,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-11-07 01:49:34,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 423. [2021-11-07 01:49:34,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 421 states have (on average 1.7553444180522566) internal successors, (739), 422 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:34,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 739 transitions. [2021-11-07 01:49:34,262 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 739 transitions. Word has length 45 [2021-11-07 01:49:34,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:34,263 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 739 transitions. [2021-11-07 01:49:34,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:34,264 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 739 transitions. [2021-11-07 01:49:34,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 01:49:34,268 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:34,268 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 01:49:34,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:34,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:34,473 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:49:34,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:34,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1561846480, now seen corresponding path program 1 times [2021-11-07 01:49:34,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:34,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [483385583] [2021-11-07 01:49:34,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:34,476 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:34,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:34,477 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:34,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:49:34,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:34,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:49:34,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:35,071 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 01:49:35,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:35,212 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 01:49:35,212 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:35,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [483385583] [2021-11-07 01:49:35,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [483385583] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:35,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:35,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:49:35,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251568147] [2021-11-07 01:49:35,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:49:35,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:35,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:49:35,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:49:35,217 INFO L87 Difference]: Start difference. First operand 423 states and 739 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:35,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:35,312 INFO L93 Difference]: Finished difference Result 1239 states and 2169 transitions. [2021-11-07 01:49:35,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:49:35,313 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 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 01:49:35,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:35,319 INFO L225 Difference]: With dead ends: 1239 [2021-11-07 01:49:35,320 INFO L226 Difference]: Without dead ends: 831 [2021-11-07 01:49:35,322 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 88 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 01:49:35,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2021-11-07 01:49:35,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 422. [2021-11-07 01:49:35,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 420 states have (on average 1.7476190476190476) internal successors, (734), 421 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:35,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 734 transitions. [2021-11-07 01:49:35,378 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 734 transitions. Word has length 46 [2021-11-07 01:49:35,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:35,379 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 734 transitions. [2021-11-07 01:49:35,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:35,379 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 734 transitions. [2021-11-07 01:49:35,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:49:35,389 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:35,389 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:35,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:35,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:35,605 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:49:35,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:35,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1854889078, now seen corresponding path program 1 times [2021-11-07 01:49:35,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:35,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [451985362] [2021-11-07 01:49:35,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:35,608 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:35,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:35,609 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:35,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:49:36,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:36,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:49:36,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:36,164 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 01:49:36,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:36,317 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 01:49:36,318 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:36,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [451985362] [2021-11-07 01:49:36,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [451985362] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:36,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:36,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:49:36,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049066937] [2021-11-07 01:49:36,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:49:36,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:36,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:49:36,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:49:36,320 INFO L87 Difference]: Start difference. First operand 422 states and 734 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 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 01:49:36,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:36,567 INFO L93 Difference]: Finished difference Result 1605 states and 2798 transitions. [2021-11-07 01:49:36,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:49:36,567 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 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 48 [2021-11-07 01:49:36,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:36,575 INFO L225 Difference]: With dead ends: 1605 [2021-11-07 01:49:36,576 INFO L226 Difference]: Without dead ends: 1201 [2021-11-07 01:49:36,577 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:49:36,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-11-07 01:49:36,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 421. [2021-11-07 01:49:36,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 419 states have (on average 1.7422434367541766) internal successors, (730), 420 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:36,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 730 transitions. [2021-11-07 01:49:36,625 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 730 transitions. Word has length 48 [2021-11-07 01:49:36,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:36,626 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 730 transitions. [2021-11-07 01:49:36,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 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 01:49:36,628 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 730 transitions. [2021-11-07 01:49:36,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:49:36,630 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:36,630 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:36,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:36,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:36,845 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:49:36,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:36,846 INFO L85 PathProgramCache]: Analyzing trace with hash -65220393, now seen corresponding path program 1 times [2021-11-07 01:49:36,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:36,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [304487474] [2021-11-07 01:49:36,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:36,847 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:36,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:36,851 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:36,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:49:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:37,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:49:37,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:37,412 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 01:49:37,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:37,537 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 01:49:37,538 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:37,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [304487474] [2021-11-07 01:49:37,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [304487474] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:37,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:37,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:49:37,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164635923] [2021-11-07 01:49:37,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:49:37,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:37,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:49:37,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:49:37,540 INFO L87 Difference]: Start difference. First operand 421 states and 730 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:37,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:37,603 INFO L93 Difference]: Finished difference Result 839 states and 1457 transitions. [2021-11-07 01:49:37,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:49:37,603 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 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 49 [2021-11-07 01:49:37,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:37,606 INFO L225 Difference]: With dead ends: 839 [2021-11-07 01:49:37,606 INFO L226 Difference]: Without dead ends: 426 [2021-11-07 01:49:37,607 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 94 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 01:49:37,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-11-07 01:49:37,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 421. [2021-11-07 01:49:37,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 419 states have (on average 1.7350835322195703) internal successors, (727), 420 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:37,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 727 transitions. [2021-11-07 01:49:37,644 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 727 transitions. Word has length 49 [2021-11-07 01:49:37,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:37,645 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 727 transitions. [2021-11-07 01:49:37,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:37,645 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 727 transitions. [2021-11-07 01:49:37,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 01:49:37,646 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:37,647 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:37,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:37,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:37,853 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:49:37,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:37,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1735348642, now seen corresponding path program 1 times [2021-11-07 01:49:37,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:37,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [266978994] [2021-11-07 01:49:37,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:37,855 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:37,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:37,856 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:37,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:49:38,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:38,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:49:38,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:38,443 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 01:49:38,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:38,599 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 01:49:38,599 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:38,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [266978994] [2021-11-07 01:49:38,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [266978994] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:38,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:38,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:49:38,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009645225] [2021-11-07 01:49:38,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:49:38,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:38,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:49:38,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:49:38,602 INFO L87 Difference]: Start difference. First operand 421 states and 727 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:38,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:38,836 INFO L93 Difference]: Finished difference Result 1592 states and 2774 transitions. [2021-11-07 01:49:38,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:49:38,837 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-07 01:49:38,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:38,845 INFO L225 Difference]: With dead ends: 1592 [2021-11-07 01:49:38,845 INFO L226 Difference]: Without dead ends: 1197 [2021-11-07 01:49:38,846 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:49:38,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-11-07 01:49:38,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 421. [2021-11-07 01:49:38,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 419 states have (on average 1.727923627684964) internal successors, (724), 420 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:38,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 724 transitions. [2021-11-07 01:49:38,884 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 724 transitions. Word has length 50 [2021-11-07 01:49:38,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:38,884 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 724 transitions. [2021-11-07 01:49:38,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:38,885 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 724 transitions. [2021-11-07 01:49:38,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:49:38,886 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:38,886 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:38,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:39,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:39,101 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:49:39,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:39,101 INFO L85 PathProgramCache]: Analyzing trace with hash -114337145, now seen corresponding path program 1 times [2021-11-07 01:49:39,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:39,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1076622051] [2021-11-07 01:49:39,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:39,102 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:39,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:39,104 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:39,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:49:39,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:39,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:49:39,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:39,649 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 01:49:39,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:39,789 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 01:49:39,789 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:39,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1076622051] [2021-11-07 01:49:39,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1076622051] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:39,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:39,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:49:39,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883684799] [2021-11-07 01:49:39,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:49:39,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:39,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:49:39,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:49:39,791 INFO L87 Difference]: Start difference. First operand 421 states and 724 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:39,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:39,893 INFO L93 Difference]: Finished difference Result 997 states and 1719 transitions. [2021-11-07 01:49:39,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:49:39,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 01:49:39,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:39,899 INFO L225 Difference]: With dead ends: 997 [2021-11-07 01:49:39,899 INFO L226 Difference]: Without dead ends: 816 [2021-11-07 01:49:39,900 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 100 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 01:49:39,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-11-07 01:49:39,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 635. [2021-11-07 01:49:39,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 633 states have (on average 1.7614533965244865) internal successors, (1115), 634 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:39,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1115 transitions. [2021-11-07 01:49:39,958 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1115 transitions. Word has length 52 [2021-11-07 01:49:39,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:39,959 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 1115 transitions. [2021-11-07 01:49:39,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:39,959 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1115 transitions. [2021-11-07 01:49:39,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:49:39,961 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:39,961 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:39,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:40,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:40,175 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:49:40,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:40,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1774408554, now seen corresponding path program 1 times [2021-11-07 01:49:40,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:40,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [360393799] [2021-11-07 01:49:40,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:40,177 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:40,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:40,178 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:40,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:49:40,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:40,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:49:40,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:40,773 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 01:49:40,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:40,930 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 01:49:40,931 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:40,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [360393799] [2021-11-07 01:49:40,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [360393799] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:40,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:40,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:49:40,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985564397] [2021-11-07 01:49:40,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:49:40,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:40,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:49:40,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:40,933 INFO L87 Difference]: Start difference. First operand 635 states and 1115 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:41,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:41,025 INFO L93 Difference]: Finished difference Result 1529 states and 2693 transitions. [2021-11-07 01:49:41,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:49:41,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 01:49:41,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:41,033 INFO L225 Difference]: With dead ends: 1529 [2021-11-07 01:49:41,033 INFO L226 Difference]: Without dead ends: 978 [2021-11-07 01:49:41,034 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:41,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2021-11-07 01:49:41,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 797. [2021-11-07 01:49:41,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 795 states have (on average 1.7723270440251573) internal successors, (1409), 796 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:41,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 1409 transitions. [2021-11-07 01:49:41,099 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 1409 transitions. Word has length 64 [2021-11-07 01:49:41,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:41,099 INFO L470 AbstractCegarLoop]: Abstraction has 797 states and 1409 transitions. [2021-11-07 01:49:41,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:41,099 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 1409 transitions. [2021-11-07 01:49:41,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:49:41,101 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:41,102 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:41,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:41,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:41,316 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:49:41,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:41,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1371796329, now seen corresponding path program 1 times [2021-11-07 01:49:41,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:41,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1371488950] [2021-11-07 01:49:41,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:41,317 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:41,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:41,318 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:41,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:49:41,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:41,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:49:41,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:41,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:41,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:42,085 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 01:49:42,085 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:42,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1371488950] [2021-11-07 01:49:42,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1371488950] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:42,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:42,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:49:42,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749254841] [2021-11-07 01:49:42,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:49:42,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:42,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:49:42,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:42,087 INFO L87 Difference]: Start difference. First operand 797 states and 1409 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:42,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:42,194 INFO L93 Difference]: Finished difference Result 2047 states and 3640 transitions. [2021-11-07 01:49:42,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:49:42,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 01:49:42,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:42,203 INFO L225 Difference]: With dead ends: 2047 [2021-11-07 01:49:42,204 INFO L226 Difference]: Without dead ends: 1342 [2021-11-07 01:49:42,206 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:42,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-11-07 01:49:42,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1161. [2021-11-07 01:49:42,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 1159 states have (on average 1.7886108714408973) internal successors, (2073), 1160 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:42,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 2073 transitions. [2021-11-07 01:49:42,347 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 2073 transitions. Word has length 65 [2021-11-07 01:49:42,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:42,347 INFO L470 AbstractCegarLoop]: Abstraction has 1161 states and 2073 transitions. [2021-11-07 01:49:42,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:42,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 2073 transitions. [2021-11-07 01:49:42,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:49:42,350 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:42,350 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:42,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:42,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:42,562 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:49:42,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:42,562 INFO L85 PathProgramCache]: Analyzing trace with hash 185173544, now seen corresponding path program 1 times [2021-11-07 01:49:42,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:42,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1686862566] [2021-11-07 01:49:42,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:42,563 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:42,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:42,564 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:42,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:49:43,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:43,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:49:43,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:43,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:43,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:43,392 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 01:49:43,392 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:43,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1686862566] [2021-11-07 01:49:43,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1686862566] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:43,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:43,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:49:43,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387646922] [2021-11-07 01:49:43,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:49:43,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:43,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:49:43,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:43,394 INFO L87 Difference]: Start difference. First operand 1161 states and 2073 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:43,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:43,549 INFO L93 Difference]: Finished difference Result 3119 states and 5601 transitions. [2021-11-07 01:49:43,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:49:43,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 01:49:43,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:43,564 INFO L225 Difference]: With dead ends: 3119 [2021-11-07 01:49:43,564 INFO L226 Difference]: Without dead ends: 2058 [2021-11-07 01:49:43,569 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:43,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2021-11-07 01:49:43,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 1877. [2021-11-07 01:49:43,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1875 states have (on average 1.8026666666666666) internal successors, (3380), 1876 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:43,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 3380 transitions. [2021-11-07 01:49:43,724 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 3380 transitions. Word has length 66 [2021-11-07 01:49:43,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:43,724 INFO L470 AbstractCegarLoop]: Abstraction has 1877 states and 3380 transitions. [2021-11-07 01:49:43,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:43,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 3380 transitions. [2021-11-07 01:49:43,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:49:43,728 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:43,728 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:43,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:43,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:43,941 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:49:43,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:43,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1406064808, now seen corresponding path program 1 times [2021-11-07 01:49:43,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:43,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1702447887] [2021-11-07 01:49:43,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:43,942 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:43,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:43,943 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:43,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:49:44,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:44,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:49:44,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:44,553 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 01:49:44,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:44,713 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 01:49:44,713 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:44,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1702447887] [2021-11-07 01:49:44,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1702447887] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:44,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:44,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:49:44,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359174808] [2021-11-07 01:49:44,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:49:44,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:44,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:49:44,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:44,716 INFO L87 Difference]: Start difference. First operand 1877 states and 3380 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:44,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:44,935 INFO L93 Difference]: Finished difference Result 5003 states and 9041 transitions. [2021-11-07 01:49:44,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:49:44,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 01:49:44,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:44,957 INFO L225 Difference]: With dead ends: 5003 [2021-11-07 01:49:44,957 INFO L226 Difference]: Without dead ends: 3260 [2021-11-07 01:49:44,960 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:44,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3260 states. [2021-11-07 01:49:45,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3260 to 3079. [2021-11-07 01:49:45,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3079 states, 3077 states have (on average 1.8098797530061748) internal successors, (5569), 3078 states have internal predecessors, (5569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:45,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3079 states to 3079 states and 5569 transitions. [2021-11-07 01:49:45,211 INFO L78 Accepts]: Start accepts. Automaton has 3079 states and 5569 transitions. Word has length 67 [2021-11-07 01:49:45,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:45,211 INFO L470 AbstractCegarLoop]: Abstraction has 3079 states and 5569 transitions. [2021-11-07 01:49:45,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:45,211 INFO L276 IsEmpty]: Start isEmpty. Operand 3079 states and 5569 transitions. [2021-11-07 01:49:45,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:49:45,221 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:45,222 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:45,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:45,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:45,437 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:49:45,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:45,437 INFO L85 PathProgramCache]: Analyzing trace with hash 2129443351, now seen corresponding path program 1 times [2021-11-07 01:49:45,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:45,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [707875772] [2021-11-07 01:49:45,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:45,438 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:45,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:45,440 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:45,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:49:45,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:45,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:49:45,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:46,140 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 01:49:46,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:46,289 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 01:49:46,289 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:46,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [707875772] [2021-11-07 01:49:46,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [707875772] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:46,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:46,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:49:46,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372090480] [2021-11-07 01:49:46,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:49:46,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:46,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:49:46,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:46,292 INFO L87 Difference]: Start difference. First operand 3079 states and 5569 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:46,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:46,623 INFO L93 Difference]: Finished difference Result 8325 states and 15091 transitions. [2021-11-07 01:49:46,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:49:46,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:49:46,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:46,659 INFO L225 Difference]: With dead ends: 8325 [2021-11-07 01:49:46,659 INFO L226 Difference]: Without dead ends: 5414 [2021-11-07 01:49:46,663 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:46,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5414 states. [2021-11-07 01:49:47,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5414 to 5233. [2021-11-07 01:49:47,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5233 states, 5231 states have (on average 1.8126553240298222) internal successors, (9482), 5232 states have internal predecessors, (9482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:47,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5233 states to 5233 states and 9482 transitions. [2021-11-07 01:49:47,060 INFO L78 Accepts]: Start accepts. Automaton has 5233 states and 9482 transitions. Word has length 68 [2021-11-07 01:49:47,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:47,061 INFO L470 AbstractCegarLoop]: Abstraction has 5233 states and 9482 transitions. [2021-11-07 01:49:47,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:47,062 INFO L276 IsEmpty]: Start isEmpty. Operand 5233 states and 9482 transitions. [2021-11-07 01:49:47,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:49:47,067 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:47,067 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:47,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:47,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:47,287 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:49:47,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:47,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1634519479, now seen corresponding path program 1 times [2021-11-07 01:49:47,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:47,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1062006384] [2021-11-07 01:49:47,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:47,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:47,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:47,289 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:47,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:49:47,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:47,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:49:47,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:47,979 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 01:49:47,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:48,144 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 01:49:48,144 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:48,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1062006384] [2021-11-07 01:49:48,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1062006384] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:48,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:48,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:49:48,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224246256] [2021-11-07 01:49:48,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:49:48,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:48,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:49:48,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:48,146 INFO L87 Difference]: Start difference. First operand 5233 states and 9482 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 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 01:49:48,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:48,703 INFO L93 Difference]: Finished difference Result 15245 states and 27672 transitions. [2021-11-07 01:49:48,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:49:48,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 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 69 [2021-11-07 01:49:48,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:48,766 INFO L225 Difference]: With dead ends: 15245 [2021-11-07 01:49:48,766 INFO L226 Difference]: Without dead ends: 10184 [2021-11-07 01:49:48,774 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:48,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10184 states. [2021-11-07 01:49:49,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10184 to 10003. [2021-11-07 01:49:49,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10003 states, 10001 states have (on average 1.8137186281371862) internal successors, (18139), 10002 states have internal predecessors, (18139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:49,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10003 states to 10003 states and 18139 transitions. [2021-11-07 01:49:49,553 INFO L78 Accepts]: Start accepts. Automaton has 10003 states and 18139 transitions. Word has length 69 [2021-11-07 01:49:49,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:49,554 INFO L470 AbstractCegarLoop]: Abstraction has 10003 states and 18139 transitions. [2021-11-07 01:49:49,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 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 01:49:49,555 INFO L276 IsEmpty]: Start isEmpty. Operand 10003 states and 18139 transitions. [2021-11-07 01:49:49,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:49:49,563 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:49,564 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:49,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:49,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:49,782 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:49:49,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:49,783 INFO L85 PathProgramCache]: Analyzing trace with hash 148146151, now seen corresponding path program 1 times [2021-11-07 01:49:49,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:49,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1367318869] [2021-11-07 01:49:49,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:49,784 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:49,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:49,785 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:49,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:49:50,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:50,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:49:50,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:50,534 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:49:50,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:49:50,733 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:50,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1367318869] [2021-11-07 01:49:50,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1367318869] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:50,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:50,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:49:50,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072954656] [2021-11-07 01:49:50,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:49:50,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:50,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:49:50,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:49:50,735 INFO L87 Difference]: Start difference. First operand 10003 states and 18139 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:53,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:53,641 INFO L93 Difference]: Finished difference Result 24640 states and 44696 transitions. [2021-11-07 01:49:53,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:49:53,641 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 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 70 [2021-11-07 01:49:53,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:53,679 INFO L225 Difference]: With dead ends: 24640 [2021-11-07 01:49:53,679 INFO L226 Difference]: Without dead ends: 14887 [2021-11-07 01:49:53,693 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:49:53,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14887 states. [2021-11-07 01:49:54,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14887 to 9970. [2021-11-07 01:49:54,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9970 states, 9968 states have (on average 1.8064807383627608) internal successors, (18007), 9969 states have internal predecessors, (18007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:54,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9970 states to 9970 states and 18007 transitions. [2021-11-07 01:49:54,437 INFO L78 Accepts]: Start accepts. Automaton has 9970 states and 18007 transitions. Word has length 70 [2021-11-07 01:49:54,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:54,437 INFO L470 AbstractCegarLoop]: Abstraction has 9970 states and 18007 transitions. [2021-11-07 01:49:54,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:54,438 INFO L276 IsEmpty]: Start isEmpty. Operand 9970 states and 18007 transitions. [2021-11-07 01:49:54,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:49:54,444 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:54,444 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:54,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:54,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:54,657 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:49:54,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:54,657 INFO L85 PathProgramCache]: Analyzing trace with hash 792742152, now seen corresponding path program 1 times [2021-11-07 01:49:54,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:54,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [101418435] [2021-11-07 01:49:54,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:54,658 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:54,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:54,659 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:54,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:49:55,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:55,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:49:55,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:55,392 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 01:49:55,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:55,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:55,559 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:55,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [101418435] [2021-11-07 01:49:55,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [101418435] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:55,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:55,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:49:55,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190797776] [2021-11-07 01:49:55,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:49:55,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:55,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:49:55,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:55,561 INFO L87 Difference]: Start difference. First operand 9970 states and 18007 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 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 01:49:56,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:56,420 INFO L93 Difference]: Finished difference Result 29160 states and 52730 transitions. [2021-11-07 01:49:56,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:49:56,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 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 70 [2021-11-07 01:49:56,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:56,472 INFO L225 Difference]: With dead ends: 29160 [2021-11-07 01:49:56,472 INFO L226 Difference]: Without dead ends: 19369 [2021-11-07 01:49:56,489 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:56,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19369 states. [2021-11-07 01:49:57,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19369 to 19188. [2021-11-07 01:49:57,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19188 states, 19186 states have (on average 1.80590013551548) internal successors, (34648), 19187 states have internal predecessors, (34648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:57,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19188 states to 19188 states and 34648 transitions. [2021-11-07 01:49:57,668 INFO L78 Accepts]: Start accepts. Automaton has 19188 states and 34648 transitions. Word has length 70 [2021-11-07 01:49:57,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:57,669 INFO L470 AbstractCegarLoop]: Abstraction has 19188 states and 34648 transitions. [2021-11-07 01:49:57,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 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 01:49:57,669 INFO L276 IsEmpty]: Start isEmpty. Operand 19188 states and 34648 transitions. [2021-11-07 01:49:57,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:49:57,677 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:57,678 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:57,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:57,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:57,897 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:49:57,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:57,897 INFO L85 PathProgramCache]: Analyzing trace with hash -2060322251, now seen corresponding path program 1 times [2021-11-07 01:49:57,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:57,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1225436772] [2021-11-07 01:49:57,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:57,898 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:57,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:57,899 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:57,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:49:58,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:58,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:49:58,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:58,646 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 01:49:58,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:58,796 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 01:49:58,796 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:58,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1225436772] [2021-11-07 01:49:58,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1225436772] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:58,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:58,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:49:58,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495194657] [2021-11-07 01:49:58,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:49:58,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:58,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:49:58,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:58,798 INFO L87 Difference]: Start difference. First operand 19188 states and 34648 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:00,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:00,248 INFO L93 Difference]: Finished difference Result 57000 states and 102967 transitions. [2021-11-07 01:50:00,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:50:00,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:50:00,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:00,333 INFO L225 Difference]: With dead ends: 57000 [2021-11-07 01:50:00,333 INFO L226 Difference]: Without dead ends: 37995 [2021-11-07 01:50:00,360 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:50:00,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37995 states. [2021-11-07 01:50:02,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37995 to 37814. [2021-11-07 01:50:02,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37814 states, 37812 states have (on average 1.8032635142282873) internal successors, (68185), 37813 states have internal predecessors, (68185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:02,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37814 states to 37814 states and 68185 transitions. [2021-11-07 01:50:02,424 INFO L78 Accepts]: Start accepts. Automaton has 37814 states and 68185 transitions. Word has length 71 [2021-11-07 01:50:02,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:02,424 INFO L470 AbstractCegarLoop]: Abstraction has 37814 states and 68185 transitions. [2021-11-07 01:50:02,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:02,425 INFO L276 IsEmpty]: Start isEmpty. Operand 37814 states and 68185 transitions. [2021-11-07 01:50:02,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:50:02,435 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:02,435 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:50:02,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 01:50:02,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:02,649 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:50:02,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:02,650 INFO L85 PathProgramCache]: Analyzing trace with hash 2055792609, now seen corresponding path program 1 times [2021-11-07 01:50:02,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:02,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [807157092] [2021-11-07 01:50:02,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:02,651 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:02,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:02,651 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:02,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:50:03,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:03,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:50:03,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:03,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:50:03,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:03,658 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:50:03,658 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:03,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [807157092] [2021-11-07 01:50:03,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [807157092] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:03,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:03,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:50:03,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351894725] [2021-11-07 01:50:03,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:50:03,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:03,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:50:03,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:50:03,660 INFO L87 Difference]: Start difference. First operand 37814 states and 68185 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:10,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:10,503 INFO L93 Difference]: Finished difference Result 146665 states and 264308 transitions. [2021-11-07 01:50:10,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:50:10,503 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:50:10,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:10,756 INFO L225 Difference]: With dead ends: 146665 [2021-11-07 01:50:10,756 INFO L226 Difference]: Without dead ends: 109100 [2021-11-07 01:50:10,797 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:50:10,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109100 states. [2021-11-07 01:50:13,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109100 to 37556. [2021-11-07 01:50:13,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37556 states, 37554 states have (on average 1.7881716994195025) internal successors, (67153), 37555 states have internal predecessors, (67153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:13,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37556 states to 37556 states and 67153 transitions. [2021-11-07 01:50:13,472 INFO L78 Accepts]: Start accepts. Automaton has 37556 states and 67153 transitions. Word has length 72 [2021-11-07 01:50:13,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:13,472 INFO L470 AbstractCegarLoop]: Abstraction has 37556 states and 67153 transitions. [2021-11-07 01:50:13,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:13,473 INFO L276 IsEmpty]: Start isEmpty. Operand 37556 states and 67153 transitions. [2021-11-07 01:50:13,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:50:13,481 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:13,481 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:50:13,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:13,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:13,701 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:50:13,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:13,701 INFO L85 PathProgramCache]: Analyzing trace with hash 497460995, now seen corresponding path program 1 times [2021-11-07 01:50:13,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:13,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1424351939] [2021-11-07 01:50:13,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:13,702 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:13,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:13,703 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:13,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:50:14,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:14,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:50:14,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:14,493 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:14,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:14,658 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:14,659 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:14,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1424351939] [2021-11-07 01:50:14,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1424351939] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:14,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:14,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:50:14,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014195094] [2021-11-07 01:50:14,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:50:14,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:14,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:50:14,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:50:14,662 INFO L87 Difference]: Start difference. First operand 37556 states and 67153 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:16,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:16,740 INFO L93 Difference]: Finished difference Result 75038 states and 134187 transitions. [2021-11-07 01:50:16,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:50:16,741 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:50:16,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:16,795 INFO L225 Difference]: With dead ends: 75038 [2021-11-07 01:50:16,795 INFO L226 Difference]: Without dead ends: 37737 [2021-11-07 01:50:16,814 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 140 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 01:50:16,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37737 states. [2021-11-07 01:50:18,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37737 to 37556. [2021-11-07 01:50:18,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37556 states, 37554 states have (on average 1.7847632742184587) internal successors, (67025), 37555 states have internal predecessors, (67025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:18,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37556 states to 37556 states and 67025 transitions. [2021-11-07 01:50:18,642 INFO L78 Accepts]: Start accepts. Automaton has 37556 states and 67025 transitions. Word has length 72 [2021-11-07 01:50:18,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:18,642 INFO L470 AbstractCegarLoop]: Abstraction has 37556 states and 67025 transitions. [2021-11-07 01:50:18,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:18,642 INFO L276 IsEmpty]: Start isEmpty. Operand 37556 states and 67025 transitions. [2021-11-07 01:50:18,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:50:18,651 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:18,651 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:50:18,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:18,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:18,853 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:50:18,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:18,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1662312950, now seen corresponding path program 1 times [2021-11-07 01:50:18,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:18,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [47959279] [2021-11-07 01:50:18,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:18,854 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:18,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:18,855 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:18,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17a536f0-3c8a-47e4-a7f6-2c934c771147/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:50:19,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:19,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:50:19,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:19,789 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 01:50:19,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:19,952 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 01:50:19,952 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:19,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [47959279] [2021-11-07 01:50:19,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [47959279] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:19,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:19,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:50:19,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563913877] [2021-11-07 01:50:19,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:50:19,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:19,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:50:19,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:50:19,955 INFO L87 Difference]: Start difference. First operand 37556 states and 67025 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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 01:50:23,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:23,201 INFO L93 Difference]: Finished difference Result 104264 states and 185717 transitions. [2021-11-07 01:50:23,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:50:23,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 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 72 [2021-11-07 01:50:23,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:23,319 INFO L225 Difference]: With dead ends: 104264 [2021-11-07 01:50:23,319 INFO L226 Difference]: Without dead ends: 66923 [2021-11-07 01:50:23,339 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:50:23,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66923 states.