./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec9_product32.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_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/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_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec9_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/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_9373596d-39d8-4d87-ab97-0fd7656a2194/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 50599b90019c0f8b15701a8959406dc5e052f09e6cd358b81cb6701fde5581e5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:04:30,520 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:04:30,523 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:04:30,587 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:04:30,587 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:04:30,591 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:04:30,593 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:04:30,597 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:04:30,600 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:04:30,605 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:04:30,606 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:04:30,608 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:04:30,609 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:04:30,611 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:04:30,613 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:04:30,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:04:30,620 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:04:30,621 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:04:30,627 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:04:30,637 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:04:30,639 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:04:30,644 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:04:30,647 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:04:30,648 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:04:30,657 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:04:30,658 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:04:30,658 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:04:30,660 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:04:30,661 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:04:30,662 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:04:30,663 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:04:30,664 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:04:30,666 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:04:30,667 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:04:30,669 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:04:30,669 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:04:30,669 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:04:30,670 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:04:30,670 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:04:30,671 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:04:30,671 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:04:30,672 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:04:30,716 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:04:30,716 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:04:30,718 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:04:30,718 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:04:30,718 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:04:30,718 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:04:30,718 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:04:30,719 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:04:30,719 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:04:30,719 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:04:30,726 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:04:30,726 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:04:30,727 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:04:30,727 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:04:30,727 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:04:30,728 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:04:30,728 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:04:30,728 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:04:30,728 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:04:30,728 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:04:30,729 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:04:30,729 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:04:30,729 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:04:30,729 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:04:30,729 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:04:30,730 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:04:30,730 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:04:30,730 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:04:30,730 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:04:30,730 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:04:30,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:04:30,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:04:30,731 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:04:30,731 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:04:30,731 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:04:30,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:04:30,732 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:04:30,732 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:04:30,732 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:04:30,732 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_9373596d-39d8-4d87-ab97-0fd7656a2194/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 50599b90019c0f8b15701a8959406dc5e052f09e6cd358b81cb6701fde5581e5 [2021-11-07 01:04:31,015 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:04:31,041 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:04:31,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:04:31,045 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:04:31,046 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:04:31,047 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec9_product32.cil.c [2021-11-07 01:04:31,115 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/data/3b679110b/3e950596d135412586c3302e46852076/FLAG11bebd89f [2021-11-07 01:04:31,713 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:04:31,716 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/sv-benchmarks/c/product-lines/email_spec9_product32.cil.c [2021-11-07 01:04:31,753 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/data/3b679110b/3e950596d135412586c3302e46852076/FLAG11bebd89f [2021-11-07 01:04:31,944 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/data/3b679110b/3e950596d135412586c3302e46852076 [2021-11-07 01:04:31,946 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:04:31,947 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:04:31,949 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:04:31,949 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:04:31,953 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:04:31,954 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:04:31" (1/1) ... [2021-11-07 01:04:31,955 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21c2ed27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:31, skipping insertion in model container [2021-11-07 01:04:31,956 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:04:31" (1/1) ... [2021-11-07 01:04:31,964 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:04:32,065 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:04:32,637 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_9373596d-39d8-4d87-ab97-0fd7656a2194/sv-benchmarks/c/product-lines/email_spec9_product32.cil.c[51167,51180] [2021-11-07 01:04:32,706 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:04:32,731 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:04:32,731 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@52572829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:32, skipping insertion in model container [2021-11-07 01:04:32,731 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:04:32,732 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:04:32,734 INFO L168 Benchmark]: Toolchain (without parser) took 785.64 ms. Allocated memory is still 119.5 MB. Free memory was 74.8 MB in the beginning and 81.2 MB in the end (delta: -6.4 MB). Peak memory consumption was 9.0 MB. Max. memory is 16.1 GB. [2021-11-07 01:04:32,735 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 119.5 MB. Free memory was 94.8 MB in the beginning and 94.7 MB in the end (delta: 65.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:04:32,738 INFO L168 Benchmark]: CACSL2BoogieTranslator took 782.35 ms. Allocated memory is still 119.5 MB. Free memory was 74.6 MB in the beginning and 81.2 MB in the end (delta: -6.6 MB). Peak memory consumption was 9.0 MB. Max. memory is 16.1 GB. [2021-11-07 01:04:32,740 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 119.5 MB. Free memory was 94.8 MB in the beginning and 94.7 MB in the end (delta: 65.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 782.35 ms. Allocated memory is still 119.5 MB. Free memory was 74.6 MB in the beginning and 81.2 MB in the end (delta: -6.6 MB). Peak memory consumption was 9.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2463]: 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_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/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_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec9_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/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_9373596d-39d8-4d87-ab97-0fd7656a2194/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 50599b90019c0f8b15701a8959406dc5e052f09e6cd358b81cb6701fde5581e5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:04:34,954 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:04:34,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:04:35,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:04:35,012 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:04:35,016 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:04:35,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:04:35,023 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:04:35,026 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:04:35,034 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:04:35,035 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:04:35,037 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:04:35,038 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:04:35,042 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:04:35,047 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:04:35,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:04:35,056 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:04:35,058 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:04:35,061 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:04:35,068 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:04:35,071 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:04:35,072 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:04:35,074 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:04:35,076 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:04:35,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:04:35,084 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:04:35,085 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:04:35,086 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:04:35,088 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:04:35,089 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:04:35,089 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:04:35,090 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:04:35,092 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:04:35,093 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:04:35,095 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:04:35,095 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:04:35,096 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:04:35,096 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:04:35,097 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:04:35,099 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:04:35,099 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:04:35,105 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:04:35,137 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:04:35,138 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:04:35,139 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:04:35,139 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:04:35,139 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:04:35,139 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:04:35,140 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:04:35,140 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:04:35,140 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:04:35,141 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:04:35,141 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:04:35,141 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:04:35,141 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:04:35,142 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:04:35,142 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:04:35,142 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:04:35,142 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:04:35,142 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:04:35,142 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:04:35,143 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:04:35,143 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:04:35,143 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:04:35,143 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:04:35,143 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:04:35,144 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:04:35,144 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:04:35,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:04:35,144 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:04:35,145 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:04:35,145 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:04:35,145 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:04:35,145 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:04:35,145 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:04:35,146 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:04:35,146 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:04:35,146 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_9373596d-39d8-4d87-ab97-0fd7656a2194/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 50599b90019c0f8b15701a8959406dc5e052f09e6cd358b81cb6701fde5581e5 [2021-11-07 01:04:35,583 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:04:35,615 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:04:35,618 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:04:35,619 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:04:35,622 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:04:35,623 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec9_product32.cil.c [2021-11-07 01:04:35,699 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/data/8444b3352/15d66167d36048e290659e932b920bf2/FLAG0ac80f9c7 [2021-11-07 01:04:36,399 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:04:36,399 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/sv-benchmarks/c/product-lines/email_spec9_product32.cil.c [2021-11-07 01:04:36,422 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/data/8444b3352/15d66167d36048e290659e932b920bf2/FLAG0ac80f9c7 [2021-11-07 01:04:36,583 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/data/8444b3352/15d66167d36048e290659e932b920bf2 [2021-11-07 01:04:36,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:04:36,587 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:04:36,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:04:36,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:04:36,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:04:36,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:04:36" (1/1) ... [2021-11-07 01:04:36,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@454a1a7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:36, skipping insertion in model container [2021-11-07 01:04:36,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:04:36" (1/1) ... [2021-11-07 01:04:36,603 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:04:36,687 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:04:37,183 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_9373596d-39d8-4d87-ab97-0fd7656a2194/sv-benchmarks/c/product-lines/email_spec9_product32.cil.c[51167,51180] [2021-11-07 01:04:37,248 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:04:37,262 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:04:37,284 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:04:37,348 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_9373596d-39d8-4d87-ab97-0fd7656a2194/sv-benchmarks/c/product-lines/email_spec9_product32.cil.c[51167,51180] [2021-11-07 01:04:37,382 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:04:37,388 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:04:37,449 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_9373596d-39d8-4d87-ab97-0fd7656a2194/sv-benchmarks/c/product-lines/email_spec9_product32.cil.c[51167,51180] [2021-11-07 01:04:37,469 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:04:37,505 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:04:37,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:37 WrapperNode [2021-11-07 01:04:37,506 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:04:37,507 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:04:37,507 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:04:37,507 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:04:37,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:37" (1/1) ... [2021-11-07 01:04:37,547 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:37" (1/1) ... [2021-11-07 01:04:37,686 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:04:37,687 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:04:37,687 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:04:37,688 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:04:37,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:37" (1/1) ... [2021-11-07 01:04:37,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:37" (1/1) ... [2021-11-07 01:04:37,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:37" (1/1) ... [2021-11-07 01:04:37,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:37" (1/1) ... [2021-11-07 01:04:37,782 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:37" (1/1) ... [2021-11-07 01:04:37,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:37" (1/1) ... [2021-11-07 01:04:37,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:37" (1/1) ... [2021-11-07 01:04:37,837 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:04:37,838 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:04:37,838 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:04:37,838 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:04:37,839 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:37" (1/1) ... [2021-11-07 01:04:37,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:04:37,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:04:37,872 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:04:37,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:04:37,917 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:04:37,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:04:37,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:04:37,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:04:37,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:04:43,812 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:04:43,812 INFO L299 CfgBuilder]: Removed 693 assume(true) statements. [2021-11-07 01:04:43,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:04:43 BoogieIcfgContainer [2021-11-07 01:04:43,816 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:04:43,820 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:04:43,820 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:04:43,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:04:43,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:04:36" (1/3) ... [2021-11-07 01:04:43,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7959a572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:04:43, skipping insertion in model container [2021-11-07 01:04:43,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:37" (2/3) ... [2021-11-07 01:04:43,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7959a572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:04:43, skipping insertion in model container [2021-11-07 01:04:43,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:04:43" (3/3) ... [2021-11-07 01:04:43,827 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec9_product32.cil.c [2021-11-07 01:04:43,832 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:04:43,832 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:04:43,896 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:04:43,905 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:04:43,905 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:04:43,954 INFO L276 IsEmpty]: Start isEmpty. Operand has 1080 states, 1073 states have (on average 1.7520969245107176) internal successors, (1880), 1079 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:43,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:04:43,983 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:43,984 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:43,984 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:43,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:43,988 INFO L85 PathProgramCache]: Analyzing trace with hash -710705232, now seen corresponding path program 1 times [2021-11-07 01:04:44,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:44,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149568722] [2021-11-07 01:04:44,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:44,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:44,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:44,004 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:44,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:04:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:44,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:04:44,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:44,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:44,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:44,762 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:44,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149568722] [2021-11-07 01:04:44,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149568722] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:44,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:44,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:04:44,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638072644] [2021-11-07 01:04:44,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:04:44,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:44,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:04:44,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:04:44,795 INFO L87 Difference]: Start difference. First operand has 1080 states, 1073 states have (on average 1.7520969245107176) internal successors, (1880), 1079 states have internal predecessors, (1880), 0 states have call successors, (0), 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 24.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:44,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:44,923 INFO L93 Difference]: Finished difference Result 1875 states and 3237 transitions. [2021-11-07 01:04:44,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:04:44,925 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 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 48 [2021-11-07 01:04:44,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:44,953 INFO L225 Difference]: With dead ends: 1875 [2021-11-07 01:04:44,954 INFO L226 Difference]: Without dead ends: 920 [2021-11-07 01:04:44,963 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:04:44,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-11-07 01:04:45,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 920. [2021-11-07 01:04:45,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 914 states have (on average 1.74945295404814) internal successors, (1599), 919 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:45,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 1599 transitions. [2021-11-07 01:04:45,072 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 1599 transitions. Word has length 48 [2021-11-07 01:04:45,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:45,072 INFO L470 AbstractCegarLoop]: Abstraction has 920 states and 1599 transitions. [2021-11-07 01:04:45,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.0) internal successors, (48), 2 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:45,073 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 1599 transitions. [2021-11-07 01:04:45,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:04:45,077 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:45,077 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:45,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:45,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:45,297 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:45,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:45,298 INFO L85 PathProgramCache]: Analyzing trace with hash 795804392, now seen corresponding path program 1 times [2021-11-07 01:04:45,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:45,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [889199125] [2021-11-07 01:04:45,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:45,300 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:45,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:45,301 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:45,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:04:45,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:45,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:04:45,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:45,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:45,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:46,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:46,115 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:46,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [889199125] [2021-11-07 01:04:46,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [889199125] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:46,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:46,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:04:46,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55716536] [2021-11-07 01:04:46,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:04:46,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:46,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:04:46,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:04:46,122 INFO L87 Difference]: Start difference. First operand 920 states and 1599 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 01:04:46,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:46,302 INFO L93 Difference]: Finished difference Result 2730 states and 4749 transitions. [2021-11-07 01:04:46,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:04:46,303 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 49 [2021-11-07 01:04:46,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:46,317 INFO L225 Difference]: With dead ends: 2730 [2021-11-07 01:04:46,317 INFO L226 Difference]: Without dead ends: 1825 [2021-11-07 01:04:46,320 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:04:46,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1825 states. [2021-11-07 01:04:46,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1825 to 919. [2021-11-07 01:04:46,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 913 states have (on average 1.745892661555312) internal successors, (1594), 918 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:46,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1594 transitions. [2021-11-07 01:04:46,378 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1594 transitions. Word has length 49 [2021-11-07 01:04:46,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:46,379 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1594 transitions. [2021-11-07 01:04:46,379 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 01:04:46,379 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1594 transitions. [2021-11-07 01:04:46,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:04:46,388 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:46,388 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] [2021-11-07 01:04:46,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:46,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:46,603 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:46,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:46,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1862687154, now seen corresponding path program 1 times [2021-11-07 01:04:46,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:46,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1767820705] [2021-11-07 01:04:46,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:46,605 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:46,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:46,606 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:46,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:04:47,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:47,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:04:47,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:47,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:47,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:47,372 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:47,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1767820705] [2021-11-07 01:04:47,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1767820705] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:47,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:47,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:04:47,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755908362] [2021-11-07 01:04:47,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:04:47,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:47,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:04:47,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:04:47,374 INFO L87 Difference]: Start difference. First operand 919 states and 1594 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:47,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:47,742 INFO L93 Difference]: Finished difference Result 3593 states and 6238 transitions. [2021-11-07 01:04:47,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:04:47,743 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 01:04:47,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:47,760 INFO L225 Difference]: With dead ends: 3593 [2021-11-07 01:04:47,760 INFO L226 Difference]: Without dead ends: 2692 [2021-11-07 01:04:47,763 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:04:47,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2692 states. [2021-11-07 01:04:47,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2692 to 918. [2021-11-07 01:04:47,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 912 states have (on average 1.743421052631579) internal successors, (1590), 917 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:47,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1590 transitions. [2021-11-07 01:04:47,855 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1590 transitions. Word has length 51 [2021-11-07 01:04:47,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:47,856 INFO L470 AbstractCegarLoop]: Abstraction has 918 states and 1590 transitions. [2021-11-07 01:04:47,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:47,856 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1590 transitions. [2021-11-07 01:04:47,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:04:47,858 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:47,858 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:47,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:48,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:48,072 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:48,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:48,073 INFO L85 PathProgramCache]: Analyzing trace with hash 728062433, now seen corresponding path program 1 times [2021-11-07 01:04:48,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:48,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1306041870] [2021-11-07 01:04:48,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:48,075 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:48,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:48,076 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:48,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:04:48,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:48,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:04:48,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:48,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:48,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:48,814 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:48,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1306041870] [2021-11-07 01:04:48,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1306041870] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:48,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:48,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:04:48,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128281841] [2021-11-07 01:04:48,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:04:48,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:48,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:04:48,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:04:48,817 INFO L87 Difference]: Start difference. First operand 918 states and 1590 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:48,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:48,920 INFO L93 Difference]: Finished difference Result 1833 states and 3177 transitions. [2021-11-07 01:04:48,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:04:48,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 01:04:48,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:48,927 INFO L225 Difference]: With dead ends: 1833 [2021-11-07 01:04:48,928 INFO L226 Difference]: Without dead ends: 923 [2021-11-07 01:04:48,929 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:04:48,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-11-07 01:04:48,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 918. [2021-11-07 01:04:48,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 912 states have (on average 1.7401315789473684) internal successors, (1587), 917 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:48,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1587 transitions. [2021-11-07 01:04:48,997 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1587 transitions. Word has length 52 [2021-11-07 01:04:48,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:48,997 INFO L470 AbstractCegarLoop]: Abstraction has 918 states and 1587 transitions. [2021-11-07 01:04:48,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:48,998 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1587 transitions. [2021-11-07 01:04:48,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:04:48,999 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:49,000 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] [2021-11-07 01:04:49,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:49,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:49,214 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:49,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:49,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1633624374, now seen corresponding path program 1 times [2021-11-07 01:04:49,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:49,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1518147432] [2021-11-07 01:04:49,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:49,216 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:49,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:49,217 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:49,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:04:49,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:49,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:04:49,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:49,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:49,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:49,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:49,945 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:49,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1518147432] [2021-11-07 01:04:49,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1518147432] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:49,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:49,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:04:49,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468100993] [2021-11-07 01:04:49,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:04:49,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:49,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:04:49,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:04:49,948 INFO L87 Difference]: Start difference. First operand 918 states and 1587 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:50,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:50,303 INFO L93 Difference]: Finished difference Result 3580 states and 6214 transitions. [2021-11-07 01:04:50,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:04:50,304 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 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 53 [2021-11-07 01:04:50,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:50,321 INFO L225 Difference]: With dead ends: 3580 [2021-11-07 01:04:50,321 INFO L226 Difference]: Without dead ends: 2688 [2021-11-07 01:04:50,325 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:04:50,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2688 states. [2021-11-07 01:04:50,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2688 to 918. [2021-11-07 01:04:50,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 912 states have (on average 1.736842105263158) internal successors, (1584), 917 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:50,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1584 transitions. [2021-11-07 01:04:50,423 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1584 transitions. Word has length 53 [2021-11-07 01:04:50,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:50,424 INFO L470 AbstractCegarLoop]: Abstraction has 918 states and 1584 transitions. [2021-11-07 01:04:50,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:50,424 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1584 transitions. [2021-11-07 01:04:50,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:04:50,427 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:50,427 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:50,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:50,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:50,646 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:50,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:50,647 INFO L85 PathProgramCache]: Analyzing trace with hash 2074751537, now seen corresponding path program 1 times [2021-11-07 01:04:50,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:50,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [321075081] [2021-11-07 01:04:50,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:50,648 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:50,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:50,650 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:50,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:04:51,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:51,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:04:51,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:51,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:51,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:51,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:51,428 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:51,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [321075081] [2021-11-07 01:04:51,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [321075081] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:51,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:51,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:04:51,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594129525] [2021-11-07 01:04:51,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:04:51,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:51,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:04:51,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:04:51,430 INFO L87 Difference]: Start difference. First operand 918 states and 1584 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:51,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:51,593 INFO L93 Difference]: Finished difference Result 2445 states and 4217 transitions. [2021-11-07 01:04:51,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:04:51,593 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 01:04:51,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:51,604 INFO L225 Difference]: With dead ends: 2445 [2021-11-07 01:04:51,604 INFO L226 Difference]: Without dead ends: 1810 [2021-11-07 01:04:51,606 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:04:51,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2021-11-07 01:04:51,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 1175. [2021-11-07 01:04:51,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1175 states, 1169 states have (on average 1.7596236099230111) internal successors, (2057), 1174 states have internal predecessors, (2057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:51,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 2057 transitions. [2021-11-07 01:04:51,702 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 2057 transitions. Word has length 55 [2021-11-07 01:04:51,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:51,703 INFO L470 AbstractCegarLoop]: Abstraction has 1175 states and 2057 transitions. [2021-11-07 01:04:51,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:51,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 2057 transitions. [2021-11-07 01:04:51,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:04:51,705 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:51,705 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:51,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:51,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:51,920 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:51,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:51,920 INFO L85 PathProgramCache]: Analyzing trace with hash 893266818, now seen corresponding path program 1 times [2021-11-07 01:04:51,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:51,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967226410] [2021-11-07 01:04:51,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:51,921 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:51,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:51,922 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:51,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:04:52,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:52,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:04:52,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:52,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:52,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:52,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:52,762 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:52,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [967226410] [2021-11-07 01:04:52,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [967226410] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:52,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:52,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:04:52,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332901688] [2021-11-07 01:04:52,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:04:52,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:52,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:04:52,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:52,765 INFO L87 Difference]: Start difference. First operand 1175 states and 2057 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:52,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:52,947 INFO L93 Difference]: Finished difference Result 3106 states and 5437 transitions. [2021-11-07 01:04:52,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:04:52,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 01:04:52,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:52,960 INFO L225 Difference]: With dead ends: 3106 [2021-11-07 01:04:52,960 INFO L226 Difference]: Without dead ends: 2015 [2021-11-07 01:04:52,963 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:52,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2015 states. [2021-11-07 01:04:53,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2015 to 1380. [2021-11-07 01:04:53,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1374 states have (on average 1.7707423580786026) internal successors, (2433), 1379 states have internal predecessors, (2433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:53,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 2433 transitions. [2021-11-07 01:04:53,075 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 2433 transitions. Word has length 67 [2021-11-07 01:04:53,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:53,078 INFO L470 AbstractCegarLoop]: Abstraction has 1380 states and 2433 transitions. [2021-11-07 01:04:53,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:53,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 2433 transitions. [2021-11-07 01:04:53,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:04:53,081 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:53,081 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:53,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:53,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:53,296 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:53,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:53,296 INFO L85 PathProgramCache]: Analyzing trace with hash -729595935, now seen corresponding path program 1 times [2021-11-07 01:04:53,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:53,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [436438863] [2021-11-07 01:04:53,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:53,297 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:53,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:53,299 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:53,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:04:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:53,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:04:53,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:54,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:54,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:54,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:54,231 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:54,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [436438863] [2021-11-07 01:04:54,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [436438863] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:54,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:54,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:04:54,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493545362] [2021-11-07 01:04:54,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:04:54,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:54,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:04:54,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:54,237 INFO L87 Difference]: Start difference. First operand 1380 states and 2433 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:54,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:54,490 INFO L93 Difference]: Finished difference Result 3753 states and 6630 transitions. [2021-11-07 01:04:54,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:04:54,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:04:54,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:54,505 INFO L225 Difference]: With dead ends: 3753 [2021-11-07 01:04:54,505 INFO L226 Difference]: Without dead ends: 2465 [2021-11-07 01:04:54,509 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:54,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2021-11-07 01:04:54,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 1830. [2021-11-07 01:04:54,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1830 states, 1824 states have (on average 1.787828947368421) internal successors, (3261), 1829 states have internal predecessors, (3261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:54,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 3261 transitions. [2021-11-07 01:04:54,678 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 3261 transitions. Word has length 68 [2021-11-07 01:04:54,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:54,678 INFO L470 AbstractCegarLoop]: Abstraction has 1830 states and 3261 transitions. [2021-11-07 01:04:54,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:54,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 3261 transitions. [2021-11-07 01:04:54,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:04:54,682 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:54,683 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:54,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:54,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:54,901 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:54,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:54,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1608061104, now seen corresponding path program 1 times [2021-11-07 01:04:54,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:54,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2065851121] [2021-11-07 01:04:54,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:54,902 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:54,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:54,906 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:54,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:04:55,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:55,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:04:55,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:55,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:55,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:55,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:55,823 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:55,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2065851121] [2021-11-07 01:04:55,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2065851121] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:55,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:55,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:04:55,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885300337] [2021-11-07 01:04:55,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:04:55,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:55,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:04:55,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:55,827 INFO L87 Difference]: Start difference. First operand 1830 states and 3261 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:56,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:56,043 INFO L93 Difference]: Finished difference Result 5083 states and 9083 transitions. [2021-11-07 01:04:56,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:04:56,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:04:56,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:56,064 INFO L225 Difference]: With dead ends: 5083 [2021-11-07 01:04:56,064 INFO L226 Difference]: Without dead ends: 3353 [2021-11-07 01:04:56,068 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:56,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3353 states. [2021-11-07 01:04:56,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3353 to 2718. [2021-11-07 01:04:56,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2718 states, 2712 states have (on average 1.8053097345132743) internal successors, (4896), 2717 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:56,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2718 states to 2718 states and 4896 transitions. [2021-11-07 01:04:56,294 INFO L78 Accepts]: Start accepts. Automaton has 2718 states and 4896 transitions. Word has length 69 [2021-11-07 01:04:56,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:56,294 INFO L470 AbstractCegarLoop]: Abstraction has 2718 states and 4896 transitions. [2021-11-07 01:04:56,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:56,294 INFO L276 IsEmpty]: Start isEmpty. Operand 2718 states and 4896 transitions. [2021-11-07 01:04:56,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:04:56,299 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:56,300 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:56,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:56,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:56,514 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:56,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:56,515 INFO L85 PathProgramCache]: Analyzing trace with hash -898322896, now seen corresponding path program 1 times [2021-11-07 01:04:56,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:56,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [905447743] [2021-11-07 01:04:56,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:56,516 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:56,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:56,517 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:56,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:04:57,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:57,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:04:57,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:57,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:57,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:57,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:57,374 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:57,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [905447743] [2021-11-07 01:04:57,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [905447743] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:57,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:57,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:04:57,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051855956] [2021-11-07 01:04:57,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:04:57,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:57,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:04:57,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:57,376 INFO L87 Difference]: Start difference. First operand 2718 states and 4896 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:57,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:57,657 INFO L93 Difference]: Finished difference Result 7483 states and 13507 transitions. [2021-11-07 01:04:57,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:04:57,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 01:04:57,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:57,711 INFO L225 Difference]: With dead ends: 7483 [2021-11-07 01:04:57,712 INFO L226 Difference]: Without dead ends: 4899 [2021-11-07 01:04:57,719 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:57,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4899 states. [2021-11-07 01:04:58,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4899 to 4264. [2021-11-07 01:04:58,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4264 states, 4258 states have (on average 1.8179896665100987) internal successors, (7741), 4263 states have internal predecessors, (7741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:58,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4264 states to 4264 states and 7741 transitions. [2021-11-07 01:04:58,040 INFO L78 Accepts]: Start accepts. Automaton has 4264 states and 7741 transitions. Word has length 70 [2021-11-07 01:04:58,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:04:58,040 INFO L470 AbstractCegarLoop]: Abstraction has 4264 states and 7741 transitions. [2021-11-07 01:04:58,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:58,041 INFO L276 IsEmpty]: Start isEmpty. Operand 4264 states and 7741 transitions. [2021-11-07 01:04:58,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:04:58,049 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:04:58,049 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:04:58,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:04:58,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:04:58,264 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:04:58,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:04:58,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1420927585, now seen corresponding path program 1 times [2021-11-07 01:04:58,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:04:58,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [300891494] [2021-11-07 01:04:58,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:04:58,265 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:04:58,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:04:58,267 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:04:58,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:04:58,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:04:58,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:04:58,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:04:58,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:58,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:04:59,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:04:59,143 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:04:59,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [300891494] [2021-11-07 01:04:59,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [300891494] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:04:59,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:04:59,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:04:59,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96935705] [2021-11-07 01:04:59,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:04:59,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:04:59,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:04:59,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:59,145 INFO L87 Difference]: Start difference. First operand 4264 states and 7741 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:04:59,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:04:59,571 INFO L93 Difference]: Finished difference Result 11837 states and 21525 transitions. [2021-11-07 01:04:59,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:04:59,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:04:59,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:04:59,593 INFO L225 Difference]: With dead ends: 11837 [2021-11-07 01:04:59,593 INFO L226 Difference]: Without dead ends: 7741 [2021-11-07 01:04:59,599 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:04:59,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7741 states. [2021-11-07 01:05:00,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7741 to 7106. [2021-11-07 01:05:00,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7106 states, 7100 states have (on average 1.8261971830985915) internal successors, (12966), 7105 states have internal predecessors, (12966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:00,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7106 states to 7106 states and 12966 transitions. [2021-11-07 01:05:00,106 INFO L78 Accepts]: Start accepts. Automaton has 7106 states and 12966 transitions. Word has length 71 [2021-11-07 01:05:00,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:00,108 INFO L470 AbstractCegarLoop]: Abstraction has 7106 states and 12966 transitions. [2021-11-07 01:05:00,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:00,109 INFO L276 IsEmpty]: Start isEmpty. Operand 7106 states and 12966 transitions. [2021-11-07 01:05:00,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:05:00,116 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:00,117 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:05:00,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:00,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:05:00,332 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:05:00,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:00,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1766584001, now seen corresponding path program 1 times [2021-11-07 01:05:00,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:00,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1385074851] [2021-11-07 01:05:00,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:00,334 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:00,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:00,335 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:00,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:05:00,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:00,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:05:00,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:01,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:01,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:01,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:01,274 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:01,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1385074851] [2021-11-07 01:05:01,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1385074851] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:01,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:05:01,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:05:01,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152994618] [2021-11-07 01:05:01,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:05:01,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:01,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:05:01,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:05:01,276 INFO L87 Difference]: Start difference. First operand 7106 states and 12966 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:01,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:01,755 INFO L93 Difference]: Finished difference Result 20821 states and 38042 transitions. [2021-11-07 01:05:01,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:05:01,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:05:01,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:01,793 INFO L225 Difference]: With dead ends: 20821 [2021-11-07 01:05:01,794 INFO L226 Difference]: Without dead ends: 13887 [2021-11-07 01:05:01,803 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:05:01,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13887 states. [2021-11-07 01:05:02,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13887 to 13252. [2021-11-07 01:05:02,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13252 states, 13246 states have (on average 1.8305148724143137) internal successors, (24247), 13251 states have internal predecessors, (24247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:02,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13252 states to 13252 states and 24247 transitions. [2021-11-07 01:05:02,504 INFO L78 Accepts]: Start accepts. Automaton has 13252 states and 24247 transitions. Word has length 72 [2021-11-07 01:05:02,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:02,504 INFO L470 AbstractCegarLoop]: Abstraction has 13252 states and 24247 transitions. [2021-11-07 01:05:02,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:02,505 INFO L276 IsEmpty]: Start isEmpty. Operand 13252 states and 24247 transitions. [2021-11-07 01:05:02,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:05:02,516 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:02,516 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:05:02,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-07 01:05:02,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:05:02,731 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:05:02,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:02,732 INFO L85 PathProgramCache]: Analyzing trace with hash 579176657, now seen corresponding path program 1 times [2021-11-07 01:05:02,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:02,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2006017077] [2021-11-07 01:05:02,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:02,733 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:02,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:02,735 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:02,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:05:03,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:03,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:05:03,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:03,541 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:05:03,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:03,755 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:05:03,756 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:03,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2006017077] [2021-11-07 01:05:03,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2006017077] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:03,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:05:03,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:05:03,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930407702] [2021-11-07 01:05:03,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:05:03,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:03,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:05:03,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:05:03,759 INFO L87 Difference]: Start difference. First operand 13252 states and 24247 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:07,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:07,041 INFO L93 Difference]: Finished difference Result 32925 states and 60232 transitions. [2021-11-07 01:05:07,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:05:07,042 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 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 73 [2021-11-07 01:05:07,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:07,086 INFO L225 Difference]: With dead ends: 32925 [2021-11-07 01:05:07,086 INFO L226 Difference]: Without dead ends: 19966 [2021-11-07 01:05:07,103 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:05:07,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19966 states. [2021-11-07 01:05:08,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19966 to 13219. [2021-11-07 01:05:08,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13219 states, 13213 states have (on average 1.8250964958752744) internal successors, (24115), 13218 states have internal predecessors, (24115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:08,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13219 states to 13219 states and 24115 transitions. [2021-11-07 01:05:08,078 INFO L78 Accepts]: Start accepts. Automaton has 13219 states and 24115 transitions. Word has length 73 [2021-11-07 01:05:08,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:08,079 INFO L470 AbstractCegarLoop]: Abstraction has 13219 states and 24115 transitions. [2021-11-07 01:05:08,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:08,079 INFO L276 IsEmpty]: Start isEmpty. Operand 13219 states and 24115 transitions. [2021-11-07 01:05:08,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:05:08,088 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:08,088 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:05:08,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:08,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:05:08,305 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:05:08,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:08,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1602690608, now seen corresponding path program 1 times [2021-11-07 01:05:08,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:08,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1554049505] [2021-11-07 01:05:08,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:08,307 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:08,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:08,308 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:08,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:05:09,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:09,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:05:09,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:09,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:09,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:09,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:09,467 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:09,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1554049505] [2021-11-07 01:05:09,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1554049505] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:09,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:05:09,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:05:09,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038106778] [2021-11-07 01:05:09,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:05:09,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:09,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:05:09,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:05:09,469 INFO L87 Difference]: Start difference. First operand 13219 states and 24115 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:10,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:10,433 INFO L93 Difference]: Finished difference Result 38864 states and 70972 transitions. [2021-11-07 01:05:10,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:05:10,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 01:05:10,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:10,497 INFO L225 Difference]: With dead ends: 38864 [2021-11-07 01:05:10,498 INFO L226 Difference]: Without dead ends: 25824 [2021-11-07 01:05:10,521 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:05:10,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25824 states. [2021-11-07 01:05:11,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25824 to 25189. [2021-11-07 01:05:11,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25189 states, 25183 states have (on average 1.8267879124806417) internal successors, (46004), 25188 states have internal predecessors, (46004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:12,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25189 states to 25189 states and 46004 transitions. [2021-11-07 01:05:12,004 INFO L78 Accepts]: Start accepts. Automaton has 25189 states and 46004 transitions. Word has length 73 [2021-11-07 01:05:12,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:12,004 INFO L470 AbstractCegarLoop]: Abstraction has 25189 states and 46004 transitions. [2021-11-07 01:05:12,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:12,005 INFO L276 IsEmpty]: Start isEmpty. Operand 25189 states and 46004 transitions. [2021-11-07 01:05:12,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:05:12,014 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:12,014 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:05:12,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:12,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:05:12,236 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:05:12,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:12,236 INFO L85 PathProgramCache]: Analyzing trace with hash 158467459, now seen corresponding path program 1 times [2021-11-07 01:05:12,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:12,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1473208870] [2021-11-07 01:05:12,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:12,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:12,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:12,239 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:12,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:05:12,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:12,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:05:12,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:13,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:13,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:13,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:13,250 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:13,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1473208870] [2021-11-07 01:05:13,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1473208870] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:13,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:05:13,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:05:13,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368376573] [2021-11-07 01:05:13,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:05:13,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:13,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:05:13,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:05:13,252 INFO L87 Difference]: Start difference. First operand 25189 states and 46004 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:15,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:15,164 INFO L93 Difference]: Finished difference Result 69413 states and 126375 transitions. [2021-11-07 01:05:15,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:05:15,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 01:05:15,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:15,253 INFO L225 Difference]: With dead ends: 69413 [2021-11-07 01:05:15,253 INFO L226 Difference]: Without dead ends: 44450 [2021-11-07 01:05:15,280 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:05:15,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44450 states. [2021-11-07 01:05:17,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44450 to 43815. [2021-11-07 01:05:17,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43815 states, 43809 states have (on average 1.815631491246091) internal successors, (79541), 43814 states have internal predecessors, (79541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:17,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43815 states to 43815 states and 79541 transitions. [2021-11-07 01:05:17,668 INFO L78 Accepts]: Start accepts. Automaton has 43815 states and 79541 transitions. Word has length 74 [2021-11-07 01:05:17,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:17,669 INFO L470 AbstractCegarLoop]: Abstraction has 43815 states and 79541 transitions. [2021-11-07 01:05:17,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:17,669 INFO L276 IsEmpty]: Start isEmpty. Operand 43815 states and 79541 transitions. [2021-11-07 01:05:17,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:05:17,680 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:17,680 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:05:17,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:17,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:05:17,899 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:05:17,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:17,900 INFO L85 PathProgramCache]: Analyzing trace with hash 267546263, now seen corresponding path program 1 times [2021-11-07 01:05:17,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:17,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765287881] [2021-11-07 01:05:17,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:17,901 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:17,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:17,902 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:17,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:05:18,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:18,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:05:18,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:18,840 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:05:18,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:19,069 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:05:19,069 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:19,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765287881] [2021-11-07 01:05:19,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765287881] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:19,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:05:19,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:05:19,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764561363] [2021-11-07 01:05:19,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:05:19,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:19,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:05:19,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:05:19,071 INFO L87 Difference]: Start difference. First operand 43815 states and 79541 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:26,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:26,142 INFO L93 Difference]: Finished difference Result 170540 states and 309486 transitions. [2021-11-07 01:05:26,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:05:26,142 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:05:26,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:26,552 INFO L225 Difference]: With dead ends: 170540 [2021-11-07 01:05:26,552 INFO L226 Difference]: Without dead ends: 127017 [2021-11-07 01:05:26,586 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:05:26,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127017 states. [2021-11-07 01:05:29,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127017 to 43557. [2021-11-07 01:05:29,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43557 states, 43551 states have (on average 1.8026910977933917) internal successors, (78509), 43556 states have internal predecessors, (78509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:29,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43557 states to 43557 states and 78509 transitions. [2021-11-07 01:05:29,548 INFO L78 Accepts]: Start accepts. Automaton has 43557 states and 78509 transitions. Word has length 75 [2021-11-07 01:05:29,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:29,548 INFO L470 AbstractCegarLoop]: Abstraction has 43557 states and 78509 transitions. [2021-11-07 01:05:29,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:29,549 INFO L276 IsEmpty]: Start isEmpty. Operand 43557 states and 78509 transitions. [2021-11-07 01:05:29,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:05:29,557 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:29,557 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:05:29,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-07 01:05:29,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:05:29,770 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:05:29,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:29,771 INFO L85 PathProgramCache]: Analyzing trace with hash 311936053, now seen corresponding path program 1 times [2021-11-07 01:05:29,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:29,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [359400659] [2021-11-07 01:05:29,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:29,772 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:29,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:29,772 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:29,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:05:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:30,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:05:30,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:30,801 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:30,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:30,983 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:30,983 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:30,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [359400659] [2021-11-07 01:05:30,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [359400659] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:30,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:05:30,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:05:30,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292201445] [2021-11-07 01:05:30,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:05:30,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:30,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:05:30,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:05:30,985 INFO L87 Difference]: Start difference. First operand 43557 states and 78509 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:32,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:32,976 INFO L93 Difference]: Finished difference Result 87451 states and 157595 transitions. [2021-11-07 01:05:32,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:05:32,978 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:05:32,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:33,039 INFO L225 Difference]: With dead ends: 87451 [2021-11-07 01:05:33,040 INFO L226 Difference]: Without dead ends: 44192 [2021-11-07 01:05:33,061 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:05:33,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44192 states. [2021-11-07 01:05:35,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44192 to 43557. [2021-11-07 01:05:35,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43557 states, 43551 states have (on average 1.7997520148791073) internal successors, (78381), 43556 states have internal predecessors, (78381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:35,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43557 states to 43557 states and 78381 transitions. [2021-11-07 01:05:35,279 INFO L78 Accepts]: Start accepts. Automaton has 43557 states and 78381 transitions. Word has length 75 [2021-11-07 01:05:35,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:05:35,280 INFO L470 AbstractCegarLoop]: Abstraction has 43557 states and 78381 transitions. [2021-11-07 01:05:35,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:35,280 INFO L276 IsEmpty]: Start isEmpty. Operand 43557 states and 78381 transitions. [2021-11-07 01:05:35,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:05:35,288 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:05:35,288 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:05:35,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:05:35,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:05:35,489 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:05:35,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:05:35,489 INFO L85 PathProgramCache]: Analyzing trace with hash 833190434, now seen corresponding path program 1 times [2021-11-07 01:05:35,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:05:35,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [950703557] [2021-11-07 01:05:35,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:05:35,490 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:05:35,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:05:35,491 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:05:35,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9373596d-39d8-4d87-ab97-0fd7656a2194/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:05:36,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:05:36,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:05:36,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:05:36,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:36,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:05:36,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:05:36,586 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:05:36,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [950703557] [2021-11-07 01:05:36,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [950703557] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:05:36,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:05:36,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:05:36,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014628452] [2021-11-07 01:05:36,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:05:36,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:05:36,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:05:36,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:05:36,590 INFO L87 Difference]: Start difference. First operand 43557 states and 78381 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:05:39,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:05:39,814 INFO L93 Difference]: Finished difference Result 122181 states and 219621 transitions. [2021-11-07 01:05:39,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:05:39,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:05:39,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:05:39,939 INFO L225 Difference]: With dead ends: 122181 [2021-11-07 01:05:39,939 INFO L226 Difference]: Without dead ends: 78882 [2021-11-07 01:05:39,963 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:05:40,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78882 states.