./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec1_product15.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_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/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_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec1_product15.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/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_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/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 68503ade3bb1f8128c7da84cd7c3e560bf5cd62b2b0df855f3aa4d33b9063aa0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:16:16,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:16:16,535 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:16:16,586 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:16:16,586 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:16:16,591 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:16:16,593 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:16:16,598 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:16:16,601 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:16:16,607 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:16:16,608 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:16:16,611 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:16:16,611 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:16:16,614 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:16:16,617 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:16:16,622 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:16:16,625 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:16:16,626 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:16:16,629 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:16:16,639 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:16:16,642 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:16:16,643 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:16:16,647 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:16:16,649 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:16:16,654 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:16:16,654 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:16:16,655 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:16:16,657 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:16:16,659 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:16:16,660 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:16:16,662 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:16:16,663 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:16:16,665 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:16:16,667 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:16:16,669 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:16:16,669 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:16:16,670 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:16:16,670 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:16:16,671 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:16:16,672 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:16:16,673 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:16:16,674 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:16:16,730 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:16:16,730 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:16:16,732 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:16:16,732 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:16:16,733 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:16:16,733 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:16:16,733 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:16:16,733 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:16:16,734 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:16:16,734 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:16:16,735 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:16:16,735 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:16:16,736 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:16:16,736 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:16:16,736 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:16:16,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:16:16,737 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:16:16,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:16:16,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:16:16,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:16:16,738 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:16:16,739 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:16:16,739 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:16:16,739 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:16:16,740 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:16:16,740 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:16:16,740 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:16:16,740 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:16:16,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:16:16,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:16:16,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:16:16,743 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:16:16,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:16:16,744 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:16:16,744 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:16:16,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:16:16,745 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:16:16,745 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:16:16,745 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:16:16,746 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_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68503ade3bb1f8128c7da84cd7c3e560bf5cd62b2b0df855f3aa4d33b9063aa0 [2021-11-07 02:16:17,052 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:16:17,076 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:16:17,079 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:16:17,080 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:16:17,081 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:16:17,082 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec1_product15.cil.c [2021-11-07 02:16:17,169 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/data/10c6b82fa/9a885af957d64ebf89512f46367007dc/FLAGb65bd268f [2021-11-07 02:16:17,819 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:16:17,820 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/sv-benchmarks/c/product-lines/email_spec1_product15.cil.c [2021-11-07 02:16:17,842 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/data/10c6b82fa/9a885af957d64ebf89512f46367007dc/FLAGb65bd268f [2021-11-07 02:16:18,050 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/data/10c6b82fa/9a885af957d64ebf89512f46367007dc [2021-11-07 02:16:18,054 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:16:18,056 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:16:18,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:16:18,061 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:16:18,065 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:16:18,066 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:16:18" (1/1) ... [2021-11-07 02:16:18,068 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22316adf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:18, skipping insertion in model container [2021-11-07 02:16:18,068 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:16:18" (1/1) ... [2021-11-07 02:16:18,077 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:16:18,171 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:16:18,625 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_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/sv-benchmarks/c/product-lines/email_spec1_product15.cil.c[34816,34829] [2021-11-07 02:16:18,862 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:16:18,879 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 02:16:18,880 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@31dc467f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:18, skipping insertion in model container [2021-11-07 02:16:18,880 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:16:18,880 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:16:18,883 INFO L168 Benchmark]: Toolchain (without parser) took 825.57 ms. Allocated memory was 102.8 MB in the beginning and 130.0 MB in the end (delta: 27.3 MB). Free memory was 66.5 MB in the beginning and 91.5 MB in the end (delta: -25.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:16:18,885 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 102.8 MB. Free memory was 58.0 MB in the beginning and 57.9 MB in the end (delta: 53.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:16:18,888 INFO L168 Benchmark]: CACSL2BoogieTranslator took 820.13 ms. Allocated memory was 102.8 MB in the beginning and 130.0 MB in the end (delta: 27.3 MB). Free memory was 66.3 MB in the beginning and 91.5 MB in the end (delta: -25.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 02:16:18,891 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 102.8 MB. Free memory was 58.0 MB in the beginning and 57.9 MB in the end (delta: 53.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 820.13 ms. Allocated memory was 102.8 MB in the beginning and 130.0 MB in the end (delta: 27.3 MB). Free memory was 66.3 MB in the beginning and 91.5 MB in the end (delta: -25.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2205]: 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_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/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_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec1_product15.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/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_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/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 68503ade3bb1f8128c7da84cd7c3e560bf5cd62b2b0df855f3aa4d33b9063aa0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:16:21,466 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:16:21,470 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:16:21,538 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:16:21,539 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:16:21,544 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:16:21,546 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:16:21,551 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:16:21,554 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:16:21,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:16:21,565 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:16:21,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:16:21,568 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:16:21,571 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:16:21,573 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:16:21,579 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:16:21,581 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:16:21,582 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:16:21,585 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:16:21,594 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:16:21,596 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:16:21,598 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:16:21,602 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:16:21,604 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:16:21,615 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:16:21,615 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:16:21,616 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:16:21,618 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:16:21,619 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:16:21,621 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:16:21,621 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:16:21,622 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:16:21,624 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:16:21,625 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:16:21,627 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:16:21,627 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:16:21,628 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:16:21,628 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:16:21,629 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:16:21,631 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:16:21,631 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:16:21,632 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:16:21,682 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:16:21,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:16:21,684 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:16:21,684 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:16:21,684 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:16:21,685 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:16:21,685 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:16:21,685 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:16:21,685 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:16:21,687 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:16:21,688 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:16:21,689 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:16:21,689 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:16:21,689 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:16:21,689 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:16:21,690 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:16:21,690 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:16:21,690 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:16:21,691 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:16:21,691 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:16:21,691 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:16:21,691 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:16:21,692 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:16:21,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:16:21,692 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:16:21,693 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:16:21,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:16:21,693 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:16:21,693 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:16:21,694 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:16:21,694 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:16:21,694 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:16:21,695 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:16:21,695 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:16:21,696 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:16:21,696 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_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68503ade3bb1f8128c7da84cd7c3e560bf5cd62b2b0df855f3aa4d33b9063aa0 [2021-11-07 02:16:22,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:16:22,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:16:22,167 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:16:22,169 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:16:22,170 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:16:22,171 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec1_product15.cil.c [2021-11-07 02:16:22,260 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/data/538730352/cd476649b9474b8d930562ee41e895e8/FLAG4d8ca13db [2021-11-07 02:16:23,211 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:16:23,212 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/sv-benchmarks/c/product-lines/email_spec1_product15.cil.c [2021-11-07 02:16:23,239 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/data/538730352/cd476649b9474b8d930562ee41e895e8/FLAG4d8ca13db [2021-11-07 02:16:23,309 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/data/538730352/cd476649b9474b8d930562ee41e895e8 [2021-11-07 02:16:23,311 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:16:23,312 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:16:23,314 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:16:23,314 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:16:23,318 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:16:23,320 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:16:23" (1/1) ... [2021-11-07 02:16:23,321 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bc51aef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:23, skipping insertion in model container [2021-11-07 02:16:23,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:16:23" (1/1) ... [2021-11-07 02:16:23,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:16:23,443 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:16:24,014 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_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/sv-benchmarks/c/product-lines/email_spec1_product15.cil.c[34816,34829] [2021-11-07 02:16:24,295 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:16:24,322 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:16:24,346 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:16:24,419 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_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/sv-benchmarks/c/product-lines/email_spec1_product15.cil.c[34816,34829] [2021-11-07 02:16:24,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:16:24,482 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:16:24,548 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_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/sv-benchmarks/c/product-lines/email_spec1_product15.cil.c[34816,34829] [2021-11-07 02:16:24,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:16:24,666 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:16:24,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:24 WrapperNode [2021-11-07 02:16:24,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:16:24,668 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:16:24,668 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:16:24,668 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:16:24,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:24" (1/1) ... [2021-11-07 02:16:24,738 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:24" (1/1) ... [2021-11-07 02:16:24,830 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:16:24,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:16:24,840 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:16:24,840 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:16:24,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:24" (1/1) ... [2021-11-07 02:16:24,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:24" (1/1) ... [2021-11-07 02:16:24,869 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:24" (1/1) ... [2021-11-07 02:16:24,869 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:24" (1/1) ... [2021-11-07 02:16:24,917 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:24" (1/1) ... [2021-11-07 02:16:24,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:24" (1/1) ... [2021-11-07 02:16:24,964 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:24" (1/1) ... [2021-11-07 02:16:24,979 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:16:24,996 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:16:24,996 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:16:24,996 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:16:24,997 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:24" (1/1) ... [2021-11-07 02:16:25,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:16:25,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:16:25,057 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:16:25,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:16:25,125 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 02:16:25,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:16:25,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:16:25,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:16:25,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:16:29,560 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:16:29,560 INFO L299 CfgBuilder]: Removed 255 assume(true) statements. [2021-11-07 02:16:29,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:16:29 BoogieIcfgContainer [2021-11-07 02:16:29,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:16:29,566 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:16:29,567 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:16:29,570 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:16:29,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:16:23" (1/3) ... [2021-11-07 02:16:29,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d6e9e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:16:29, skipping insertion in model container [2021-11-07 02:16:29,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:24" (2/3) ... [2021-11-07 02:16:29,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d6e9e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:16:29, skipping insertion in model container [2021-11-07 02:16:29,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:16:29" (3/3) ... [2021-11-07 02:16:29,574 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec1_product15.cil.c [2021-11-07 02:16:29,581 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:16:29,581 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 02:16:29,642 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:16:29,650 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 02:16:29,650 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 02:16:29,679 INFO L276 IsEmpty]: Start isEmpty. Operand has 409 states, 406 states have (on average 1.7684729064039408) internal successors, (718), 408 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:29,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 02:16:29,694 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:29,694 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] [2021-11-07 02:16:29,695 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:29,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:29,702 INFO L85 PathProgramCache]: Analyzing trace with hash 840373952, now seen corresponding path program 1 times [2021-11-07 02:16:29,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:29,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [77734022] [2021-11-07 02:16:29,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:29,721 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:29,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:29,725 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:29,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:16:30,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:30,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:16:30,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:30,447 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 02:16:30,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:30,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:30,574 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:30,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [77734022] [2021-11-07 02:16:30,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [77734022] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:30,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:30,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:16:30,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039480462] [2021-11-07 02:16:30,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:16:30,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:30,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:16:30,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:16:30,612 INFO L87 Difference]: Start difference. First operand has 409 states, 406 states have (on average 1.7684729064039408) internal successors, (718), 408 states have internal predecessors, (718), 0 states have call successors, (0), 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 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:30,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:30,682 INFO L93 Difference]: Finished difference Result 576 states and 995 transitions. [2021-11-07 02:16:30,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:16:30,684 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-11-07 02:16:30,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:30,703 INFO L225 Difference]: With dead ends: 576 [2021-11-07 02:16:30,703 INFO L226 Difference]: Without dead ends: 364 [2021-11-07 02:16:30,708 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 80 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 02:16:30,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-11-07 02:16:30,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2021-11-07 02:16:30,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 362 states have (on average 1.7624309392265194) internal successors, (638), 363 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:30,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 638 transitions. [2021-11-07 02:16:30,786 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 638 transitions. Word has length 41 [2021-11-07 02:16:30,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:30,786 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 638 transitions. [2021-11-07 02:16:30,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:30,787 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 638 transitions. [2021-11-07 02:16:30,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 02:16:30,792 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:30,792 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] [2021-11-07 02:16:30,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:31,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:31,009 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:31,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:31,010 INFO L85 PathProgramCache]: Analyzing trace with hash 948761907, now seen corresponding path program 1 times [2021-11-07 02:16:31,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:31,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1157238769] [2021-11-07 02:16:31,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:31,012 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:31,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:31,022 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:31,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:16:31,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:31,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:16:31,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:31,638 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 02:16:31,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:31,789 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 02:16:31,789 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:31,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1157238769] [2021-11-07 02:16:31,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1157238769] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:31,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:31,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:16:31,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666275987] [2021-11-07 02:16:31,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:16:31,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:31,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:16:31,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:16:31,794 INFO L87 Difference]: Start difference. First operand 364 states and 638 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:31,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:31,938 INFO L93 Difference]: Finished difference Result 1062 states and 1866 transitions. [2021-11-07 02:16:31,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:16:31,939 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 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 42 [2021-11-07 02:16:31,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:31,950 INFO L225 Difference]: With dead ends: 1062 [2021-11-07 02:16:31,950 INFO L226 Difference]: Without dead ends: 713 [2021-11-07 02:16:31,957 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 80 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 02:16:31,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-11-07 02:16:32,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 363. [2021-11-07 02:16:32,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 361 states have (on average 1.7534626038781163) internal successors, (633), 362 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:32,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 633 transitions. [2021-11-07 02:16:32,033 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 633 transitions. Word has length 42 [2021-11-07 02:16:32,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:32,034 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 633 transitions. [2021-11-07 02:16:32,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:32,035 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 633 transitions. [2021-11-07 02:16:32,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 02:16:32,048 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:32,048 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:16:32,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:32,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:32,271 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:32,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:32,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1153087629, now seen corresponding path program 1 times [2021-11-07 02:16:32,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:32,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [749498541] [2021-11-07 02:16:32,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:32,274 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:32,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:32,275 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:32,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:16:32,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:32,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:16:32,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:32,981 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 02:16:32,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:33,175 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 02:16:33,176 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:33,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [749498541] [2021-11-07 02:16:33,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [749498541] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:33,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:33,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:16:33,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238370178] [2021-11-07 02:16:33,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:16:33,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:33,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:16:33,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:16:33,183 INFO L87 Difference]: Start difference. First operand 363 states and 633 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:33,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:33,455 INFO L93 Difference]: Finished difference Result 1369 states and 2394 transitions. [2021-11-07 02:16:33,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:16:33,456 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 02:16:33,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:33,465 INFO L225 Difference]: With dead ends: 1369 [2021-11-07 02:16:33,465 INFO L226 Difference]: Without dead ends: 1024 [2021-11-07 02:16:33,466 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 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 02:16:33,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-11-07 02:16:33,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 362. [2021-11-07 02:16:33,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 360 states have (on average 1.7472222222222222) internal successors, (629), 361 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:33,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 629 transitions. [2021-11-07 02:16:33,510 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 629 transitions. Word has length 44 [2021-11-07 02:16:33,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:33,510 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 629 transitions. [2021-11-07 02:16:33,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:33,512 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 629 transitions. [2021-11-07 02:16:33,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 02:16:33,513 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:33,513 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:16:33,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:33,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:33,728 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:33,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:33,728 INFO L85 PathProgramCache]: Analyzing trace with hash 2047054938, now seen corresponding path program 1 times [2021-11-07 02:16:33,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:33,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [773669995] [2021-11-07 02:16:33,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:33,730 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:33,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:33,735 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:33,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:16:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:34,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:16:34,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:34,361 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 02:16:34,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:34,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:34,487 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:34,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [773669995] [2021-11-07 02:16:34,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [773669995] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:34,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:34,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:16:34,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009884166] [2021-11-07 02:16:34,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:16:34,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:34,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:16:34,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:16:34,490 INFO L87 Difference]: Start difference. First operand 362 states and 629 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 02:16:34,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:34,562 INFO L93 Difference]: Finished difference Result 721 states and 1255 transitions. [2021-11-07 02:16:34,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:16:34,562 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 45 [2021-11-07 02:16:34,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:34,565 INFO L225 Difference]: With dead ends: 721 [2021-11-07 02:16:34,565 INFO L226 Difference]: Without dead ends: 367 [2021-11-07 02:16:34,566 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 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 02:16:34,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-11-07 02:16:34,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 362. [2021-11-07 02:16:34,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 360 states have (on average 1.738888888888889) internal successors, (626), 361 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:34,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 626 transitions. [2021-11-07 02:16:34,592 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 626 transitions. Word has length 45 [2021-11-07 02:16:34,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:34,592 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 626 transitions. [2021-11-07 02:16:34,593 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 02:16:34,593 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 626 transitions. [2021-11-07 02:16:34,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 02:16:34,594 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:34,594 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 02:16:34,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:34,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:34,808 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:34,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:34,808 INFO L85 PathProgramCache]: Analyzing trace with hash 112472741, now seen corresponding path program 1 times [2021-11-07 02:16:34,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:34,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1650506925] [2021-11-07 02:16:34,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:34,810 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:34,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:34,812 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:34,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:16:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:35,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:16:35,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:35,416 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 02:16:35,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:35,605 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 02:16:35,612 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:35,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1650506925] [2021-11-07 02:16:35,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1650506925] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:35,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:35,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:16:35,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29542090] [2021-11-07 02:16:35,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:16:35,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:35,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:16:35,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:16:35,619 INFO L87 Difference]: Start difference. First operand 362 states and 626 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 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 02:16:35,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:35,890 INFO L93 Difference]: Finished difference Result 1356 states and 2370 transitions. [2021-11-07 02:16:35,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:16:35,891 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 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 46 [2021-11-07 02:16:35,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:35,899 INFO L225 Difference]: With dead ends: 1356 [2021-11-07 02:16:35,899 INFO L226 Difference]: Without dead ends: 1020 [2021-11-07 02:16:35,901 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 86 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 02:16:35,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2021-11-07 02:16:35,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 362. [2021-11-07 02:16:35,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 360 states have (on average 1.7305555555555556) internal successors, (623), 361 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:35,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 623 transitions. [2021-11-07 02:16:35,940 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 623 transitions. Word has length 46 [2021-11-07 02:16:35,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:35,943 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 623 transitions. [2021-11-07 02:16:35,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 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 02:16:35,943 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 623 transitions. [2021-11-07 02:16:35,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 02:16:35,946 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:35,946 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 02:16:35,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:36,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:36,166 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:36,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:36,167 INFO L85 PathProgramCache]: Analyzing trace with hash 2008970762, now seen corresponding path program 1 times [2021-11-07 02:16:36,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:36,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967881119] [2021-11-07 02:16:36,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:36,169 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:36,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:36,170 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:36,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:16:36,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:36,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:16:36,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:36,859 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 02:16:36,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:36,971 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 02:16:36,971 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:36,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [967881119] [2021-11-07 02:16:36,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [967881119] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:36,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:36,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:16:36,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744387718] [2021-11-07 02:16:36,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:16:36,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:36,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:16:36,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:16:36,974 INFO L87 Difference]: Start difference. First operand 362 states and 623 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:37,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:37,043 INFO L93 Difference]: Finished difference Result 820 states and 1416 transitions. [2021-11-07 02:16:37,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:16:37,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 02:16:37,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:37,049 INFO L225 Difference]: With dead ends: 820 [2021-11-07 02:16:37,049 INFO L226 Difference]: Without dead ends: 698 [2021-11-07 02:16:37,050 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 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 02:16:37,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2021-11-07 02:16:37,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 576. [2021-11-07 02:16:37,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 574 states have (on average 1.7665505226480835) internal successors, (1014), 575 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:37,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1014 transitions. [2021-11-07 02:16:37,098 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1014 transitions. Word has length 48 [2021-11-07 02:16:37,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:37,099 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 1014 transitions. [2021-11-07 02:16:37,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:37,099 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1014 transitions. [2021-11-07 02:16:37,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 02:16:37,101 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:37,101 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:16:37,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-07 02:16:37,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:37,314 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:37,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:37,315 INFO L85 PathProgramCache]: Analyzing trace with hash -173201511, now seen corresponding path program 1 times [2021-11-07 02:16:37,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:37,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [711579590] [2021-11-07 02:16:37,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:37,317 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:37,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:37,318 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:37,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:16:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:37,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:16:37,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:38,019 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 02:16:38,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:38,186 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 02:16:38,186 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:38,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [711579590] [2021-11-07 02:16:38,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [711579590] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:38,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:38,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:16:38,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471590864] [2021-11-07 02:16:38,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:16:38,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:38,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:16:38,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:16:38,189 INFO L87 Difference]: Start difference. First operand 576 states and 1014 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:38,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:38,300 INFO L93 Difference]: Finished difference Result 1352 states and 2390 transitions. [2021-11-07 02:16:38,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:16:38,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 02:16:38,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:38,307 INFO L225 Difference]: With dead ends: 1352 [2021-11-07 02:16:38,308 INFO L226 Difference]: Without dead ends: 860 [2021-11-07 02:16:38,309 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 117 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 02:16:38,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2021-11-07 02:16:38,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 738. [2021-11-07 02:16:38,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 736 states have (on average 1.7771739130434783) internal successors, (1308), 737 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:38,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1308 transitions. [2021-11-07 02:16:38,385 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1308 transitions. Word has length 60 [2021-11-07 02:16:38,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:38,386 INFO L470 AbstractCegarLoop]: Abstraction has 738 states and 1308 transitions. [2021-11-07 02:16:38,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:38,386 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1308 transitions. [2021-11-07 02:16:38,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 02:16:38,389 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:38,389 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:16:38,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:38,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:38,607 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:38,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:38,607 INFO L85 PathProgramCache]: Analyzing trace with hash 647409690, now seen corresponding path program 1 times [2021-11-07 02:16:38,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:38,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1751582570] [2021-11-07 02:16:38,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:38,608 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:38,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:38,610 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:38,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:16:39,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:39,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:16:39,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:39,299 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 02:16:39,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:39,474 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 02:16:39,474 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:39,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1751582570] [2021-11-07 02:16:39,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1751582570] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:39,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:39,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:16:39,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378903614] [2021-11-07 02:16:39,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:16:39,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:39,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:16:39,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:16:39,477 INFO L87 Difference]: Start difference. First operand 738 states and 1308 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:39,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:39,598 INFO L93 Difference]: Finished difference Result 1870 states and 3337 transitions. [2021-11-07 02:16:39,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:16:39,599 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 02:16:39,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:39,609 INFO L225 Difference]: With dead ends: 1870 [2021-11-07 02:16:39,609 INFO L226 Difference]: Without dead ends: 1224 [2021-11-07 02:16:39,611 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 119 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 02:16:39,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2021-11-07 02:16:39,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 1102. [2021-11-07 02:16:39,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1100 states have (on average 1.7927272727272727) internal successors, (1972), 1101 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:39,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1972 transitions. [2021-11-07 02:16:39,726 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1972 transitions. Word has length 61 [2021-11-07 02:16:39,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:39,726 INFO L470 AbstractCegarLoop]: Abstraction has 1102 states and 1972 transitions. [2021-11-07 02:16:39,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:39,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1972 transitions. [2021-11-07 02:16:39,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 02:16:39,730 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:39,730 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:16:39,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:39,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:39,947 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:39,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:39,948 INFO L85 PathProgramCache]: Analyzing trace with hash 570006059, now seen corresponding path program 1 times [2021-11-07 02:16:39,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:39,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [876899608] [2021-11-07 02:16:39,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:39,948 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:39,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:39,949 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:39,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:16:40,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:40,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:16:40,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:40,711 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 02:16:40,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:40,901 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 02:16:40,901 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:40,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [876899608] [2021-11-07 02:16:40,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [876899608] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:40,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:40,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:16:40,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815592196] [2021-11-07 02:16:40,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:16:40,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:40,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:16:40,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:16:40,906 INFO L87 Difference]: Start difference. First operand 1102 states and 1972 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:41,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:41,082 INFO L93 Difference]: Finished difference Result 2942 states and 5298 transitions. [2021-11-07 02:16:41,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:16:41,083 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 02:16:41,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:41,097 INFO L225 Difference]: With dead ends: 2942 [2021-11-07 02:16:41,097 INFO L226 Difference]: Without dead ends: 1940 [2021-11-07 02:16:41,100 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:16:41,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-11-07 02:16:41,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1818. [2021-11-07 02:16:41,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1816 states have (on average 1.8056167400881058) internal successors, (3279), 1817 states have internal predecessors, (3279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:41,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 3279 transitions. [2021-11-07 02:16:41,288 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 3279 transitions. Word has length 62 [2021-11-07 02:16:41,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:41,288 INFO L470 AbstractCegarLoop]: Abstraction has 1818 states and 3279 transitions. [2021-11-07 02:16:41,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:41,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 3279 transitions. [2021-11-07 02:16:41,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 02:16:41,293 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:41,293 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:16:41,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:41,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:41,508 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:41,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:41,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1397501099, now seen corresponding path program 1 times [2021-11-07 02:16:41,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:41,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [105014858] [2021-11-07 02:16:41,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:41,509 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:41,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:41,511 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:41,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:16:42,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:42,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:16:42,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:42,359 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 02:16:42,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:42,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:16:42,552 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:42,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [105014858] [2021-11-07 02:16:42,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [105014858] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:42,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:42,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:16:42,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497687825] [2021-11-07 02:16:42,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:16:42,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:42,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:16:42,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:16:42,555 INFO L87 Difference]: Start difference. First operand 1818 states and 3279 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:42,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:42,838 INFO L93 Difference]: Finished difference Result 4826 states and 8738 transitions. [2021-11-07 02:16:42,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:16:42,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 02:16:42,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:42,865 INFO L225 Difference]: With dead ends: 4826 [2021-11-07 02:16:42,865 INFO L226 Difference]: Without dead ends: 3142 [2021-11-07 02:16:42,871 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:16:42,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3142 states. [2021-11-07 02:16:43,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3142 to 3020. [2021-11-07 02:16:43,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3020 states, 3018 states have (on average 1.8117958913187542) internal successors, (5468), 3019 states have internal predecessors, (5468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:43,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3020 states to 3020 states and 5468 transitions. [2021-11-07 02:16:43,178 INFO L78 Accepts]: Start accepts. Automaton has 3020 states and 5468 transitions. Word has length 63 [2021-11-07 02:16:43,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:43,178 INFO L470 AbstractCegarLoop]: Abstraction has 3020 states and 5468 transitions. [2021-11-07 02:16:43,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:43,179 INFO L276 IsEmpty]: Start isEmpty. Operand 3020 states and 5468 transitions. [2021-11-07 02:16:43,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 02:16:43,183 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:43,183 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 02:16:43,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:43,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:43,398 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:43,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:43,398 INFO L85 PathProgramCache]: Analyzing trace with hash 968498586, now seen corresponding path program 1 times [2021-11-07 02:16:43,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:43,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669456762] [2021-11-07 02:16:43,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:43,399 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:43,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:43,400 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:43,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:16:43,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:43,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:16:43,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:44,167 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 02:16:44,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:44,369 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 02:16:44,369 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:44,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669456762] [2021-11-07 02:16:44,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669456762] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:44,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:44,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:16:44,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089139202] [2021-11-07 02:16:44,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:16:44,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:44,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:16:44,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:16:44,372 INFO L87 Difference]: Start difference. First operand 3020 states and 5468 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 02:16:44,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:44,797 INFO L93 Difference]: Finished difference Result 8148 states and 14788 transitions. [2021-11-07 02:16:44,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:16:44,798 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 02:16:44,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:44,840 INFO L225 Difference]: With dead ends: 8148 [2021-11-07 02:16:44,840 INFO L226 Difference]: Without dead ends: 5296 [2021-11-07 02:16:44,845 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 02:16:44,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5296 states. [2021-11-07 02:16:45,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5296 to 5174. [2021-11-07 02:16:45,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5174 states, 5172 states have (on average 1.8138051044083527) internal successors, (9381), 5173 states have internal predecessors, (9381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:45,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5174 states to 5174 states and 9381 transitions. [2021-11-07 02:16:45,371 INFO L78 Accepts]: Start accepts. Automaton has 5174 states and 9381 transitions. Word has length 64 [2021-11-07 02:16:45,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:45,371 INFO L470 AbstractCegarLoop]: Abstraction has 5174 states and 9381 transitions. [2021-11-07 02:16:45,371 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 02:16:45,371 INFO L276 IsEmpty]: Start isEmpty. Operand 5174 states and 9381 transitions. [2021-11-07 02:16:45,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 02:16:45,384 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:45,384 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 02:16:45,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:45,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:45,594 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:45,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:45,595 INFO L85 PathProgramCache]: Analyzing trace with hash 687013178, now seen corresponding path program 1 times [2021-11-07 02:16:45,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:45,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1941051745] [2021-11-07 02:16:45,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:45,597 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:45,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:45,600 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:45,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:16:46,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:46,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:16:46,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:46,440 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 02:16:46,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:46,632 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 02:16:46,633 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:46,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1941051745] [2021-11-07 02:16:46,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1941051745] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:46,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:46,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:16:46,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203778870] [2021-11-07 02:16:46,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:16:46,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:46,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:16:46,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:16:46,636 INFO L87 Difference]: Start difference. First operand 5174 states and 9381 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 02:16:47,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:47,332 INFO L93 Difference]: Finished difference Result 15068 states and 27369 transitions. [2021-11-07 02:16:47,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:16:47,333 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 02:16:47,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:47,416 INFO L225 Difference]: With dead ends: 15068 [2021-11-07 02:16:47,416 INFO L226 Difference]: Without dead ends: 10066 [2021-11-07 02:16:47,425 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 02:16:47,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10066 states. [2021-11-07 02:16:48,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10066 to 9944. [2021-11-07 02:16:48,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9944 states, 9942 states have (on average 1.8143230738282037) internal successors, (18038), 9943 states have internal predecessors, (18038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:48,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9944 states to 9944 states and 18038 transitions. [2021-11-07 02:16:48,327 INFO L78 Accepts]: Start accepts. Automaton has 9944 states and 18038 transitions. Word has length 65 [2021-11-07 02:16:48,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:48,327 INFO L470 AbstractCegarLoop]: Abstraction has 9944 states and 18038 transitions. [2021-11-07 02:16:48,328 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 02:16:48,328 INFO L276 IsEmpty]: Start isEmpty. Operand 9944 states and 18038 transitions. [2021-11-07 02:16:48,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 02:16:48,335 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:48,335 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] [2021-11-07 02:16:48,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:48,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:48,553 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:48,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:48,554 INFO L85 PathProgramCache]: Analyzing trace with hash 819024746, now seen corresponding path program 1 times [2021-11-07 02:16:48,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:48,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052840589] [2021-11-07 02:16:48,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:48,555 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:48,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:48,556 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:48,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:16:49,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:49,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:16:49,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:49,366 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 02:16:49,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:49,613 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 02:16:49,614 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:49,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052840589] [2021-11-07 02:16:49,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2052840589] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:49,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:49,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:16:49,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519563389] [2021-11-07 02:16:49,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:16:49,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:49,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:16:49,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:16:49,616 INFO L87 Difference]: Start difference. First operand 9944 states and 18038 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:52,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:52,707 INFO L93 Difference]: Finished difference Result 24463 states and 44393 transitions. [2021-11-07 02:16:52,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:16:52,708 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 02:16:52,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:52,764 INFO L225 Difference]: With dead ends: 24463 [2021-11-07 02:16:52,764 INFO L226 Difference]: Without dead ends: 14769 [2021-11-07 02:16:52,780 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 126 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 02:16:52,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14769 states. [2021-11-07 02:16:53,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14769 to 9911. [2021-11-07 02:16:53,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9911 states, 9909 states have (on average 1.8070441013220304) internal successors, (17906), 9910 states have internal predecessors, (17906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:53,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9911 states to 9911 states and 17906 transitions. [2021-11-07 02:16:53,619 INFO L78 Accepts]: Start accepts. Automaton has 9911 states and 17906 transitions. Word has length 66 [2021-11-07 02:16:53,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:53,619 INFO L470 AbstractCegarLoop]: Abstraction has 9911 states and 17906 transitions. [2021-11-07 02:16:53,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:53,620 INFO L276 IsEmpty]: Start isEmpty. Operand 9911 states and 17906 transitions. [2021-11-07 02:16:53,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 02:16:53,638 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:53,638 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 02:16:53,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:53,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:53,857 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:53,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:53,857 INFO L85 PathProgramCache]: Analyzing trace with hash -691745525, now seen corresponding path program 1 times [2021-11-07 02:16:53,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:53,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [672688922] [2021-11-07 02:16:53,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:53,858 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:53,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:53,859 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:53,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:16:54,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:54,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:16:54,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:55,013 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 02:16:55,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:55,215 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 02:16:55,215 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:55,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [672688922] [2021-11-07 02:16:55,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [672688922] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:55,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:55,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:16:55,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456792194] [2021-11-07 02:16:55,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:16:55,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:55,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:16:55,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:16:55,218 INFO L87 Difference]: Start difference. First operand 9911 states and 17906 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 02:16:56,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:56,142 INFO L93 Difference]: Finished difference Result 28983 states and 52427 transitions. [2021-11-07 02:16:56,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:16:56,143 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 02:16:56,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:56,194 INFO L225 Difference]: With dead ends: 28983 [2021-11-07 02:16:56,194 INFO L226 Difference]: Without dead ends: 19251 [2021-11-07 02:16:56,209 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 02:16:56,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19251 states. [2021-11-07 02:16:57,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19251 to 19129. [2021-11-07 02:16:57,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19129 states, 19127 states have (on average 1.8061902023317824) internal successors, (34547), 19128 states have internal predecessors, (34547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:57,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19129 states to 19129 states and 34547 transitions. [2021-11-07 02:16:57,635 INFO L78 Accepts]: Start accepts. Automaton has 19129 states and 34547 transitions. Word has length 66 [2021-11-07 02:16:57,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:57,636 INFO L470 AbstractCegarLoop]: Abstraction has 19129 states and 34547 transitions. [2021-11-07 02:16:57,636 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 02:16:57,636 INFO L276 IsEmpty]: Start isEmpty. Operand 19129 states and 34547 transitions. [2021-11-07 02:16:57,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 02:16:57,645 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:57,645 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 02:16:57,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:57,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:57,863 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:16:57,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:57,863 INFO L85 PathProgramCache]: Analyzing trace with hash 393223352, now seen corresponding path program 1 times [2021-11-07 02:16:57,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:57,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [374234909] [2021-11-07 02:16:57,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:57,864 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:57,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:57,866 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:57,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:16:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:58,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:16:58,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:58,769 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 02:16:58,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:58,934 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 02:16:58,934 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:58,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [374234909] [2021-11-07 02:16:58,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [374234909] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:58,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:58,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:16:58,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834657579] [2021-11-07 02:16:58,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:16:58,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:58,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:16:58,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:16:58,937 INFO L87 Difference]: Start difference. First operand 19129 states and 34547 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 02:17:00,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:00,570 INFO L93 Difference]: Finished difference Result 56823 states and 102664 transitions. [2021-11-07 02:17:00,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:17:00,570 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 02:17:00,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:00,650 INFO L225 Difference]: With dead ends: 56823 [2021-11-07 02:17:00,651 INFO L226 Difference]: Without dead ends: 37877 [2021-11-07 02:17:00,683 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 02:17:00,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37877 states. [2021-11-07 02:17:03,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37877 to 37755. [2021-11-07 02:17:03,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37755 states, 37753 states have (on average 1.803406351813101) internal successors, (68084), 37754 states have internal predecessors, (68084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:03,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37755 states to 37755 states and 68084 transitions. [2021-11-07 02:17:03,471 INFO L78 Accepts]: Start accepts. Automaton has 37755 states and 68084 transitions. Word has length 67 [2021-11-07 02:17:03,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:03,471 INFO L470 AbstractCegarLoop]: Abstraction has 37755 states and 68084 transitions. [2021-11-07 02:17:03,472 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 02:17:03,472 INFO L276 IsEmpty]: Start isEmpty. Operand 37755 states and 68084 transitions. [2021-11-07 02:17:03,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 02:17:03,483 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:03,483 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:03,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:03,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:17:03,701 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:17:03,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:03,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1101479836, now seen corresponding path program 1 times [2021-11-07 02:17:03,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:03,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [436818777] [2021-11-07 02:17:03,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:03,703 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:03,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:03,704 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:03,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:17:04,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:04,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:17:04,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:04,694 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 02:17:04,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:04,943 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 02:17:04,943 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:04,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [436818777] [2021-11-07 02:17:04,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [436818777] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:04,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:17:04,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:17:04,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320861608] [2021-11-07 02:17:04,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:17:04,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:04,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:17:04,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:17:04,946 INFO L87 Difference]: Start difference. First operand 37755 states and 68084 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:12,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:12,775 INFO L93 Difference]: Finished difference Result 146429 states and 263904 transitions. [2021-11-07 02:17:12,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:17:12,776 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 02:17:12,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:13,156 INFO L225 Difference]: With dead ends: 146429 [2021-11-07 02:17:13,156 INFO L226 Difference]: Without dead ends: 108923 [2021-11-07 02:17:13,201 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 130 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 02:17:13,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108923 states. [2021-11-07 02:17:16,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108923 to 37497. [2021-11-07 02:17:16,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37497 states, 37495 states have (on average 1.788291772236298) internal successors, (67052), 37496 states have internal predecessors, (67052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:16,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37497 states to 37497 states and 67052 transitions. [2021-11-07 02:17:16,850 INFO L78 Accepts]: Start accepts. Automaton has 37497 states and 67052 transitions. Word has length 68 [2021-11-07 02:17:16,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:16,851 INFO L470 AbstractCegarLoop]: Abstraction has 37497 states and 67052 transitions. [2021-11-07 02:17:16,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:16,851 INFO L276 IsEmpty]: Start isEmpty. Operand 37497 states and 67052 transitions. [2021-11-07 02:17:16,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 02:17:16,859 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:16,859 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] [2021-11-07 02:17:16,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-07 02:17:17,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:17:17,076 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:17:17,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:17,077 INFO L85 PathProgramCache]: Analyzing trace with hash 132604038, now seen corresponding path program 1 times [2021-11-07 02:17:17,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:17,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [301961039] [2021-11-07 02:17:17,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:17,078 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:17,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:17,079 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:17,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:17:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:17,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:17:17,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:17,982 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 02:17:17,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:18,181 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 02:17:18,181 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:18,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [301961039] [2021-11-07 02:17:18,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [301961039] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:18,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:17:18,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:17:18,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801685120] [2021-11-07 02:17:18,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:17:18,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:18,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:17:18,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:17:18,185 INFO L87 Difference]: Start difference. First operand 37497 states and 67052 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:20,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:20,390 INFO L93 Difference]: Finished difference Result 74861 states and 133884 transitions. [2021-11-07 02:17:20,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:17:20,390 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 02:17:20,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:20,455 INFO L225 Difference]: With dead ends: 74861 [2021-11-07 02:17:20,455 INFO L226 Difference]: Without dead ends: 37619 [2021-11-07 02:17:20,482 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:17:20,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37619 states. [2021-11-07 02:17:23,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37619 to 37497. [2021-11-07 02:17:23,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37497 states, 37495 states have (on average 1.7848779837311641) internal successors, (66924), 37496 states have internal predecessors, (66924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:23,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37497 states to 37497 states and 66924 transitions. [2021-11-07 02:17:23,105 INFO L78 Accepts]: Start accepts. Automaton has 37497 states and 66924 transitions. Word has length 68 [2021-11-07 02:17:23,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:23,106 INFO L470 AbstractCegarLoop]: Abstraction has 37497 states and 66924 transitions. [2021-11-07 02:17:23,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:23,106 INFO L276 IsEmpty]: Start isEmpty. Operand 37497 states and 66924 transitions. [2021-11-07 02:17:23,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 02:17:23,114 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:23,114 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 02:17:23,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:23,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:17:23,333 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:17:23,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:23,334 INFO L85 PathProgramCache]: Analyzing trace with hash -826864391, now seen corresponding path program 1 times [2021-11-07 02:17:23,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:23,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [527905429] [2021-11-07 02:17:23,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:23,335 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:23,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:23,335 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:23,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5268bc49-8c7b-4ffa-8519-015d0b6c30d2/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:17:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:24,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:17:24,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:24,307 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 02:17:24,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:24,478 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 02:17:24,479 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:24,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [527905429] [2021-11-07 02:17:24,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [527905429] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:24,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:17:24,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:17:24,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232731175] [2021-11-07 02:17:24,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:17:24,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:24,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:17:24,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:17:24,482 INFO L87 Difference]: Start difference. First operand 37497 states and 66924 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 02:17:28,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:28,291 INFO L93 Difference]: Finished difference Result 104087 states and 185414 transitions. [2021-11-07 02:17:28,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:17:28,292 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 02:17:28,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:28,413 INFO L225 Difference]: With dead ends: 104087 [2021-11-07 02:17:28,413 INFO L226 Difference]: Without dead ends: 66805 [2021-11-07 02:17:28,436 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 02:17:28,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66805 states.