./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec7_product23.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_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/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_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec7_product23.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/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_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/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 1bb2b79cb955f3674656871a8781fc51d3f295e24daabeaa86e62b128ba42f2a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:11:08,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:11:08,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:11:08,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:11:08,473 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:11:08,477 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:11:08,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:11:08,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:11:08,486 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:11:08,494 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:11:08,495 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:11:08,497 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:11:08,497 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:11:08,500 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:11:08,501 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:11:08,503 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:11:08,505 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:11:08,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:11:08,511 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:11:08,521 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:11:08,523 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:11:08,524 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:11:08,527 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:11:08,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:11:08,532 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:11:08,532 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:11:08,533 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:11:08,535 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:11:08,535 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:11:08,537 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:11:08,537 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:11:08,538 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:11:08,540 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:11:08,541 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:11:08,542 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:11:08,542 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:11:08,543 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:11:08,543 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:11:08,544 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:11:08,545 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:11:08,545 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:11:08,546 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:11:08,591 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:11:08,592 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:11:08,593 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:11:08,593 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:11:08,593 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:11:08,593 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:11:08,594 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:11:08,594 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:11:08,600 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:11:08,600 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:11:08,601 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:11:08,602 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:11:08,602 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:11:08,602 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:11:08,602 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:11:08,603 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:11:08,603 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:11:08,604 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:11:08,604 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:11:08,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:11:08,604 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:11:08,604 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:11:08,605 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:11:08,605 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:11:08,605 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:11:08,605 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:11:08,606 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:11:08,606 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:11:08,606 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:11:08,607 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:11:08,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:11:08,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:11:08,608 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:11:08,609 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:11:08,609 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:11:08,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:11:08,609 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:11:08,609 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:11:08,610 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:11:08,610 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_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bb2b79cb955f3674656871a8781fc51d3f295e24daabeaa86e62b128ba42f2a [2021-11-07 01:11:08,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:11:08,918 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:11:08,922 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:11:08,923 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:11:08,924 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:11:08,925 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec7_product23.cil.c [2021-11-07 01:11:09,014 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/data/424412725/b6bc2264f61344a0b313cb4a71df5291/FLAG1139e21c5 [2021-11-07 01:11:09,646 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:11:09,646 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/sv-benchmarks/c/product-lines/email_spec7_product23.cil.c [2021-11-07 01:11:09,680 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/data/424412725/b6bc2264f61344a0b313cb4a71df5291/FLAG1139e21c5 [2021-11-07 01:11:09,893 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/data/424412725/b6bc2264f61344a0b313cb4a71df5291 [2021-11-07 01:11:09,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:11:09,897 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:11:09,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:11:09,911 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:11:09,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:11:09,915 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:11:09" (1/1) ... [2021-11-07 01:11:09,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20cbd1c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:09, skipping insertion in model container [2021-11-07 01:11:09,916 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:11:09" (1/1) ... [2021-11-07 01:11:09,924 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:11:10,012 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:11:10,367 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_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/sv-benchmarks/c/product-lines/email_spec7_product23.cil.c[18387,18400] [2021-11-07 01:11:10,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:11:10,639 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 01:11:10,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7be5a118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:10, skipping insertion in model container [2021-11-07 01:11:10,640 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:11:10,640 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:11:10,642 INFO L168 Benchmark]: Toolchain (without parser) took 743.75 ms. Allocated memory is still 115.3 MB. Free memory was 77.4 MB in the beginning and 77.5 MB in the end (delta: -110.2 kB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:11:10,644 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 83.9 MB. Free memory was 55.3 MB in the beginning and 55.2 MB in the end (delta: 32.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:11:10,646 INFO L168 Benchmark]: CACSL2BoogieTranslator took 728.97 ms. Allocated memory is still 115.3 MB. Free memory was 77.1 MB in the beginning and 77.5 MB in the end (delta: -415.2 kB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:11:10,648 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 83.9 MB. Free memory was 55.3 MB in the beginning and 55.2 MB in the end (delta: 32.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 728.97 ms. Allocated memory is still 115.3 MB. Free memory was 77.1 MB in the beginning and 77.5 MB in the end (delta: -415.2 kB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2100]: 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_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/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_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec7_product23.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/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_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/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 1bb2b79cb955f3674656871a8781fc51d3f295e24daabeaa86e62b128ba42f2a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:11:12,883 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:11:12,885 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:11:12,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:11:12,917 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:11:12,918 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:11:12,920 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:11:12,922 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:11:12,924 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:11:12,927 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:11:12,928 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:11:12,929 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:11:12,930 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:11:12,931 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:11:12,932 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:11:12,934 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:11:12,935 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:11:12,936 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:11:12,938 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:11:12,953 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:11:12,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:11:12,958 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:11:12,960 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:11:12,961 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:11:12,964 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:11:12,965 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:11:12,965 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:11:12,966 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:11:12,971 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:11:12,972 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:11:12,973 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:11:12,973 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:11:12,975 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:11:12,976 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:11:12,980 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:11:12,980 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:11:12,981 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:11:12,981 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:11:12,981 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:11:12,983 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:11:12,983 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:11:12,984 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:11:13,043 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:11:13,043 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:11:13,044 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:11:13,044 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:11:13,044 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:11:13,045 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:11:13,045 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:11:13,045 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:11:13,045 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:11:13,046 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:11:13,046 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:11:13,046 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:11:13,046 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:11:13,047 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:11:13,047 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:11:13,047 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:11:13,047 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:11:13,047 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:11:13,048 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:11:13,048 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:11:13,048 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:11:13,048 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:11:13,048 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:11:13,049 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:11:13,049 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:11:13,049 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:11:13,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:11:13,050 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:11:13,050 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:11:13,050 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:11:13,050 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:11:13,050 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:11:13,051 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:11:13,051 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:11:13,051 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:11:13,051 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_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bb2b79cb955f3674656871a8781fc51d3f295e24daabeaa86e62b128ba42f2a [2021-11-07 01:11:13,368 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:11:13,402 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:11:13,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:11:13,407 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:11:13,407 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:11:13,408 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec7_product23.cil.c [2021-11-07 01:11:13,483 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/data/dc808eae1/81fec560ca4a4edab5e118eebc2a89ef/FLAG89b93797b [2021-11-07 01:11:14,281 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:11:14,281 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/sv-benchmarks/c/product-lines/email_spec7_product23.cil.c [2021-11-07 01:11:14,304 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/data/dc808eae1/81fec560ca4a4edab5e118eebc2a89ef/FLAG89b93797b [2021-11-07 01:11:14,481 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/data/dc808eae1/81fec560ca4a4edab5e118eebc2a89ef [2021-11-07 01:11:14,483 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:11:14,484 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:11:14,495 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:11:14,495 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:11:14,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:11:14,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:11:14" (1/1) ... [2021-11-07 01:11:14,503 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c6172c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:14, skipping insertion in model container [2021-11-07 01:11:14,503 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:11:14" (1/1) ... [2021-11-07 01:11:14,510 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:11:14,585 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:11:14,873 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_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/sv-benchmarks/c/product-lines/email_spec7_product23.cil.c[18387,18400] [2021-11-07 01:11:15,100 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:11:15,115 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:11:15,142 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:11:15,172 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_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/sv-benchmarks/c/product-lines/email_spec7_product23.cil.c[18387,18400] [2021-11-07 01:11:15,260 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:11:15,267 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:11:15,326 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_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/sv-benchmarks/c/product-lines/email_spec7_product23.cil.c[18387,18400] [2021-11-07 01:11:15,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:11:15,439 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:11:15,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:15 WrapperNode [2021-11-07 01:11:15,440 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:11:15,441 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:11:15,442 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:11:15,442 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:11:15,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:15" (1/1) ... [2021-11-07 01:11:15,507 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:15" (1/1) ... [2021-11-07 01:11:15,645 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:11:15,646 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:11:15,650 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:11:15,650 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:11:15,658 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:15" (1/1) ... [2021-11-07 01:11:15,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:15" (1/1) ... [2021-11-07 01:11:15,685 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:15" (1/1) ... [2021-11-07 01:11:15,685 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:15" (1/1) ... [2021-11-07 01:11:15,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:15" (1/1) ... [2021-11-07 01:11:15,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:15" (1/1) ... [2021-11-07 01:11:15,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:15" (1/1) ... [2021-11-07 01:11:15,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:11:15,793 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:11:15,794 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:11:15,794 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:11:15,795 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:15" (1/1) ... [2021-11-07 01:11:15,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:11:15,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:11:15,880 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:11:15,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:11:15,925 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:11:15,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:11:15,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:11:15,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:11:15,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:11:20,737 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:11:20,738 INFO L299 CfgBuilder]: Removed 501 assume(true) statements. [2021-11-07 01:11:20,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:11:20 BoogieIcfgContainer [2021-11-07 01:11:20,743 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:11:20,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:11:20,745 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:11:20,748 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:11:20,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:11:14" (1/3) ... [2021-11-07 01:11:20,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ddd2991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:11:20, skipping insertion in model container [2021-11-07 01:11:20,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:15" (2/3) ... [2021-11-07 01:11:20,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ddd2991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:11:20, skipping insertion in model container [2021-11-07 01:11:20,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:11:20" (3/3) ... [2021-11-07 01:11:20,751 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec7_product23.cil.c [2021-11-07 01:11:20,756 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:11:20,757 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:11:20,824 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:11:20,835 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 01:11:20,835 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:11:20,869 INFO L276 IsEmpty]: Start isEmpty. Operand has 756 states, 749 states have (on average 1.7570093457943925) internal successors, (1316), 755 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:20,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 01:11:20,883 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:20,884 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:20,884 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 01:11:20,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:20,890 INFO L85 PathProgramCache]: Analyzing trace with hash -5754939, now seen corresponding path program 1 times [2021-11-07 01:11:20,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:20,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1787197722] [2021-11-07 01:11:20,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:20,912 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:20,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:20,917 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:20,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:11:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:21,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:11:21,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:21,459 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 01:11:21,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:21,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:21,574 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:21,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1787197722] [2021-11-07 01:11:21,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1787197722] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:21,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:21,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:11:21,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694805148] [2021-11-07 01:11:21,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:11:21,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:21,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:11:21,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:11:21,599 INFO L87 Difference]: Start difference. First operand has 756 states, 749 states have (on average 1.7570093457943925) internal successors, (1316), 755 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:21,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:21,670 INFO L93 Difference]: Finished difference Result 1227 states and 2109 transitions. [2021-11-07 01:11:21,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:11:21,671 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-07 01:11:21,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:21,690 INFO L225 Difference]: With dead ends: 1227 [2021-11-07 01:11:21,690 INFO L226 Difference]: Without dead ends: 664 [2021-11-07 01:11:21,695 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:11:21,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-11-07 01:11:21,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 664. [2021-11-07 01:11:21,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 658 states have (on average 1.749240121580547) internal successors, (1151), 663 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:21,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1151 transitions. [2021-11-07 01:11:21,808 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1151 transitions. Word has length 41 [2021-11-07 01:11:21,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:21,809 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 1151 transitions. [2021-11-07 01:11:21,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:21,809 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1151 transitions. [2021-11-07 01:11:21,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 01:11:21,818 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:21,818 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:21,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:22,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:22,039 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 01:11:22,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:22,040 INFO L85 PathProgramCache]: Analyzing trace with hash 607214477, now seen corresponding path program 1 times [2021-11-07 01:11:22,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:22,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [555210005] [2021-11-07 01:11:22,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:22,041 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:22,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:22,042 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:22,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:11:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:22,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:11:22,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:22,561 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 01:11:22,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:22,668 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 01:11:22,668 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:22,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [555210005] [2021-11-07 01:11:22,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [555210005] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:22,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:22,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:11:22,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148288138] [2021-11-07 01:11:22,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:11:22,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:22,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:11:22,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:22,675 INFO L87 Difference]: Start difference. First operand 664 states and 1151 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:22,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:22,790 INFO L93 Difference]: Finished difference Result 1962 states and 3405 transitions. [2021-11-07 01:11:22,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:11:22,791 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-07 01:11:22,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:22,800 INFO L225 Difference]: With dead ends: 1962 [2021-11-07 01:11:22,800 INFO L226 Difference]: Without dead ends: 1313 [2021-11-07 01:11:22,804 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:22,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-11-07 01:11:22,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 663. [2021-11-07 01:11:22,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 657 states have (on average 1.7442922374429224) internal successors, (1146), 662 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:22,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1146 transitions. [2021-11-07 01:11:22,855 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1146 transitions. Word has length 42 [2021-11-07 01:11:22,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:22,856 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 1146 transitions. [2021-11-07 01:11:22,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:22,856 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1146 transitions. [2021-11-07 01:11:22,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 01:11:22,858 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:22,858 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] [2021-11-07 01:11:22,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:23,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:23,072 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 01:11:23,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:23,073 INFO L85 PathProgramCache]: Analyzing trace with hash 811540199, now seen corresponding path program 1 times [2021-11-07 01:11:23,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:23,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [710713106] [2021-11-07 01:11:23,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:23,074 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:23,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:23,077 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:23,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:11:23,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:23,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:11:23,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:23,590 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 01:11:23,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:23,699 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 01:11:23,699 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:23,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [710713106] [2021-11-07 01:11:23,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [710713106] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:23,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:23,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:11:23,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067138248] [2021-11-07 01:11:23,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:11:23,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:23,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:11:23,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:11:23,703 INFO L87 Difference]: Start difference. First operand 663 states and 1146 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:24,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:24,022 INFO L93 Difference]: Finished difference Result 2569 states and 4446 transitions. [2021-11-07 01:11:24,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:11:24,023 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 01:11:24,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:24,036 INFO L225 Difference]: With dead ends: 2569 [2021-11-07 01:11:24,036 INFO L226 Difference]: Without dead ends: 1924 [2021-11-07 01:11:24,038 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:11:24,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2021-11-07 01:11:24,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 662. [2021-11-07 01:11:24,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 656 states have (on average 1.7408536585365855) internal successors, (1142), 661 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:24,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1142 transitions. [2021-11-07 01:11:24,086 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1142 transitions. Word has length 44 [2021-11-07 01:11:24,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:24,086 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 1142 transitions. [2021-11-07 01:11:24,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:24,088 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1142 transitions. [2021-11-07 01:11:24,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:11:24,090 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:24,090 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:24,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:24,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:24,308 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 01:11:24,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:24,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1705507508, now seen corresponding path program 1 times [2021-11-07 01:11:24,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:24,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [361464513] [2021-11-07 01:11:24,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:24,310 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:24,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:24,311 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:24,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:11:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:24,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:11:24,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:24,844 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 01:11:24,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:24,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:24,955 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:24,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [361464513] [2021-11-07 01:11:24,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [361464513] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:24,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:24,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:11:24,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946528181] [2021-11-07 01:11:24,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:11:24,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:24,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:11:24,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:24,958 INFO L87 Difference]: Start difference. First operand 662 states and 1142 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:25,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:25,043 INFO L93 Difference]: Finished difference Result 1321 states and 2281 transitions. [2021-11-07 01:11:25,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:11:25,045 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 01:11:25,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:25,050 INFO L225 Difference]: With dead ends: 1321 [2021-11-07 01:11:25,050 INFO L226 Difference]: Without dead ends: 667 [2021-11-07 01:11:25,051 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:25,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-11-07 01:11:25,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 662. [2021-11-07 01:11:25,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 656 states have (on average 1.736280487804878) internal successors, (1139), 661 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:25,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1139 transitions. [2021-11-07 01:11:25,092 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1139 transitions. Word has length 45 [2021-11-07 01:11:25,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:25,093 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 1139 transitions. [2021-11-07 01:11:25,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:25,093 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1139 transitions. [2021-11-07 01:11:25,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 01:11:25,094 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:25,094 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:25,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:25,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:25,315 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 01:11:25,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:25,315 INFO L85 PathProgramCache]: Analyzing trace with hash -229074689, now seen corresponding path program 1 times [2021-11-07 01:11:25,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:25,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1240485209] [2021-11-07 01:11:25,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:25,316 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:25,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:25,317 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:25,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:11:25,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:25,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:11:25,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:25,835 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 01:11:25,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:25,955 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 01:11:25,955 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:25,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1240485209] [2021-11-07 01:11:25,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1240485209] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:25,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:25,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:11:25,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647035628] [2021-11-07 01:11:25,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:11:25,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:25,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:11:25,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:11:25,966 INFO L87 Difference]: Start difference. First operand 662 states and 1139 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:26,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:26,259 INFO L93 Difference]: Finished difference Result 2556 states and 4422 transitions. [2021-11-07 01:11:26,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:11:26,260 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-07 01:11:26,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:26,272 INFO L225 Difference]: With dead ends: 2556 [2021-11-07 01:11:26,272 INFO L226 Difference]: Without dead ends: 1920 [2021-11-07 01:11:26,274 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:11:26,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-11-07 01:11:26,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 662. [2021-11-07 01:11:26,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 656 states have (on average 1.7317073170731707) internal successors, (1136), 661 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:26,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1136 transitions. [2021-11-07 01:11:26,330 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1136 transitions. Word has length 46 [2021-11-07 01:11:26,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:26,332 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 1136 transitions. [2021-11-07 01:11:26,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:26,333 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1136 transitions. [2021-11-07 01:11:26,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:11:26,335 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:26,335 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:26,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:26,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:26,549 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 01:11:26,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:26,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1667423332, now seen corresponding path program 1 times [2021-11-07 01:11:26,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:26,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [379144499] [2021-11-07 01:11:26,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:26,552 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:26,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:26,553 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:26,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:11:26,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:26,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:26,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:27,111 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 01:11:27,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:27,227 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 01:11:27,227 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:27,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [379144499] [2021-11-07 01:11:27,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [379144499] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:27,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:27,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:11:27,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645540757] [2021-11-07 01:11:27,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:11:27,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:27,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:11:27,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:27,230 INFO L87 Difference]: Start difference. First operand 662 states and 1136 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 01:11:27,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:27,372 INFO L93 Difference]: Finished difference Result 1677 states and 2873 transitions. [2021-11-07 01:11:27,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:11:27,373 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 01:11:27,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:27,381 INFO L225 Difference]: With dead ends: 1677 [2021-11-07 01:11:27,381 INFO L226 Difference]: Without dead ends: 1298 [2021-11-07 01:11:27,382 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:27,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2021-11-07 01:11:27,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 919. [2021-11-07 01:11:27,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 913 states have (on average 1.7623220153340635) internal successors, (1609), 918 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:27,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1609 transitions. [2021-11-07 01:11:27,475 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1609 transitions. Word has length 48 [2021-11-07 01:11:27,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:27,475 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1609 transitions. [2021-11-07 01:11:27,475 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 01:11:27,476 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1609 transitions. [2021-11-07 01:11:27,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:11:27,477 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:27,477 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:27,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:27,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:27,691 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 01:11:27,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:27,692 INFO L85 PathProgramCache]: Analyzing trace with hash 14109747, now seen corresponding path program 1 times [2021-11-07 01:11:27,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:27,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [247268550] [2021-11-07 01:11:27,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:27,693 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:27,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:27,693 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:27,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:11:28,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:28,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:28,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:28,278 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 01:11:28,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:28,404 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 01:11:28,404 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:28,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [247268550] [2021-11-07 01:11:28,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [247268550] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:28,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:28,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:11:28,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203707851] [2021-11-07 01:11:28,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:11:28,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:28,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:11:28,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:28,406 INFO L87 Difference]: Start difference. First operand 919 states and 1609 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:28,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:28,539 INFO L93 Difference]: Finished difference Result 2338 states and 4093 transitions. [2021-11-07 01:11:28,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:28,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 01:11:28,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:28,549 INFO L225 Difference]: With dead ends: 2338 [2021-11-07 01:11:28,549 INFO L226 Difference]: Without dead ends: 1503 [2021-11-07 01:11:28,551 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:28,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1503 states. [2021-11-07 01:11:28,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1503 to 1124. [2021-11-07 01:11:28,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1118 states have (on average 1.7754919499105546) internal successors, (1985), 1123 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:28,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 1985 transitions. [2021-11-07 01:11:28,643 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 1985 transitions. Word has length 60 [2021-11-07 01:11:28,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:28,644 INFO L470 AbstractCegarLoop]: Abstraction has 1124 states and 1985 transitions. [2021-11-07 01:11:28,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:28,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 1985 transitions. [2021-11-07 01:11:28,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:11:28,647 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:28,649 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:28,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:28,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:28,864 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 01:11:28,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:28,864 INFO L85 PathProgramCache]: Analyzing trace with hash 834720948, now seen corresponding path program 1 times [2021-11-07 01:11:28,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:28,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1794893980] [2021-11-07 01:11:28,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:28,865 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:28,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:28,867 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:28,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:11:29,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:29,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:29,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:29,461 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 01:11:29,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:29,590 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 01:11:29,590 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:29,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1794893980] [2021-11-07 01:11:29,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1794893980] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:29,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:29,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:11:29,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349941481] [2021-11-07 01:11:29,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:11:29,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:29,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:11:29,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:29,592 INFO L87 Difference]: Start difference. First operand 1124 states and 1985 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:29,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:29,774 INFO L93 Difference]: Finished difference Result 2985 states and 5286 transitions. [2021-11-07 01:11:29,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:29,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 01:11:29,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:29,787 INFO L225 Difference]: With dead ends: 2985 [2021-11-07 01:11:29,787 INFO L226 Difference]: Without dead ends: 1953 [2021-11-07 01:11:29,790 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:29,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-11-07 01:11:29,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1574. [2021-11-07 01:11:29,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1574 states, 1568 states have (on average 1.7940051020408163) internal successors, (2813), 1573 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:29,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1574 states to 1574 states and 2813 transitions. [2021-11-07 01:11:29,921 INFO L78 Accepts]: Start accepts. Automaton has 1574 states and 2813 transitions. Word has length 61 [2021-11-07 01:11:29,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:29,921 INFO L470 AbstractCegarLoop]: Abstraction has 1574 states and 2813 transitions. [2021-11-07 01:11:29,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:29,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1574 states and 2813 transitions. [2021-11-07 01:11:29,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:11:29,924 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:29,924 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:29,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:30,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:30,139 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 01:11:30,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:30,139 INFO L85 PathProgramCache]: Analyzing trace with hash 757317317, now seen corresponding path program 1 times [2021-11-07 01:11:30,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:30,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1756705188] [2021-11-07 01:11:30,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:30,140 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:30,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:30,145 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:30,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:11:30,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:30,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:30,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:30,736 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 01:11:30,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:30,864 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 01:11:30,865 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:30,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1756705188] [2021-11-07 01:11:30,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1756705188] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:30,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:30,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:11:30,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779219790] [2021-11-07 01:11:30,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:11:30,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:30,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:11:30,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:30,870 INFO L87 Difference]: Start difference. First operand 1574 states and 2813 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:31,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:31,068 INFO L93 Difference]: Finished difference Result 4315 states and 7739 transitions. [2021-11-07 01:11:31,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:31,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 01:11:31,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:31,085 INFO L225 Difference]: With dead ends: 4315 [2021-11-07 01:11:31,085 INFO L226 Difference]: Without dead ends: 2841 [2021-11-07 01:11:31,089 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:31,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2841 states. [2021-11-07 01:11:31,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2841 to 2462. [2021-11-07 01:11:31,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2462 states, 2456 states have (on average 1.8110749185667752) internal successors, (4448), 2461 states have internal predecessors, (4448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:31,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 4448 transitions. [2021-11-07 01:11:31,301 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 4448 transitions. Word has length 62 [2021-11-07 01:11:31,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:31,302 INFO L470 AbstractCegarLoop]: Abstraction has 2462 states and 4448 transitions. [2021-11-07 01:11:31,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:31,302 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 4448 transitions. [2021-11-07 01:11:31,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:11:31,306 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:31,306 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:31,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:31,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:31,520 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 01:11:31,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:31,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1584812357, now seen corresponding path program 1 times [2021-11-07 01:11:31,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:31,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437173117] [2021-11-07 01:11:31,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:31,521 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:31,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:31,522 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:31,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:11:31,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:31,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:31,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:32,125 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 01:11:32,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:32,305 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 01:11:32,305 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:32,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437173117] [2021-11-07 01:11:32,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437173117] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:32,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:32,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:11:32,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956223381] [2021-11-07 01:11:32,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:11:32,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:32,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:11:32,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:32,307 INFO L87 Difference]: Start difference. First operand 2462 states and 4448 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:32,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:32,592 INFO L93 Difference]: Finished difference Result 6715 states and 12163 transitions. [2021-11-07 01:11:32,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:32,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 01:11:32,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:32,620 INFO L225 Difference]: With dead ends: 6715 [2021-11-07 01:11:32,620 INFO L226 Difference]: Without dead ends: 4387 [2021-11-07 01:11:32,624 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:32,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4387 states. [2021-11-07 01:11:32,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4387 to 4008. [2021-11-07 01:11:32,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4008 states, 4002 states have (on average 1.8223388305847077) internal successors, (7293), 4007 states have internal predecessors, (7293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:32,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4008 states to 4008 states and 7293 transitions. [2021-11-07 01:11:32,940 INFO L78 Accepts]: Start accepts. Automaton has 4008 states and 7293 transitions. Word has length 63 [2021-11-07 01:11:32,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:32,940 INFO L470 AbstractCegarLoop]: Abstraction has 4008 states and 7293 transitions. [2021-11-07 01:11:32,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:32,941 INFO L276 IsEmpty]: Start isEmpty. Operand 4008 states and 7293 transitions. [2021-11-07 01:11:32,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:11:32,945 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:32,945 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:32,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:33,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:33,160 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 01:11:33,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:33,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1155809844, now seen corresponding path program 1 times [2021-11-07 01:11:33,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:33,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2107272364] [2021-11-07 01:11:33,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:33,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:33,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:33,162 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:33,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:11:33,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:33,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:33,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:33,821 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 01:11:33,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:33,973 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 01:11:33,973 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:33,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2107272364] [2021-11-07 01:11:33,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2107272364] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:33,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:33,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:11:33,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312675399] [2021-11-07 01:11:33,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:11:33,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:33,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:11:33,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:33,975 INFO L87 Difference]: Start difference. First operand 4008 states and 7293 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:34,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:34,385 INFO L93 Difference]: Finished difference Result 11069 states and 20181 transitions. [2021-11-07 01:11:34,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:34,386 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 01:11:34,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:34,431 INFO L225 Difference]: With dead ends: 11069 [2021-11-07 01:11:34,431 INFO L226 Difference]: Without dead ends: 7229 [2021-11-07 01:11:34,437 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:34,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7229 states. [2021-11-07 01:11:34,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7229 to 6850. [2021-11-07 01:11:34,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6850 states, 6844 states have (on average 1.8290473407364114) internal successors, (12518), 6849 states have internal predecessors, (12518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:34,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6850 states to 6850 states and 12518 transitions. [2021-11-07 01:11:34,988 INFO L78 Accepts]: Start accepts. Automaton has 6850 states and 12518 transitions. Word has length 64 [2021-11-07 01:11:34,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:34,990 INFO L470 AbstractCegarLoop]: Abstraction has 6850 states and 12518 transitions. [2021-11-07 01:11:34,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:34,991 INFO L276 IsEmpty]: Start isEmpty. Operand 6850 states and 12518 transitions. [2021-11-07 01:11:35,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:11:35,001 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:35,001 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:35,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-07 01:11:35,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:35,216 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 01:11:35,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:35,217 INFO L85 PathProgramCache]: Analyzing trace with hash 874324436, now seen corresponding path program 1 times [2021-11-07 01:11:35,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:35,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1923795014] [2021-11-07 01:11:35,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:35,218 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:35,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:35,219 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:35,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:11:35,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:35,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:35,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:35,892 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 01:11:35,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:36,067 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 01:11:36,067 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:36,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1923795014] [2021-11-07 01:11:36,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1923795014] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:36,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:36,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:11:36,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455485314] [2021-11-07 01:11:36,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:11:36,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:36,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:11:36,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:36,071 INFO L87 Difference]: Start difference. First operand 6850 states and 12518 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:36,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:36,703 INFO L93 Difference]: Finished difference Result 20053 states and 36698 transitions. [2021-11-07 01:11:36,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:36,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 01:11:36,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:36,741 INFO L225 Difference]: With dead ends: 20053 [2021-11-07 01:11:36,742 INFO L226 Difference]: Without dead ends: 13375 [2021-11-07 01:11:36,753 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:36,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13375 states. [2021-11-07 01:11:37,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13375 to 12996. [2021-11-07 01:11:37,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12996 states, 12990 states have (on average 1.8321016166281756) internal successors, (23799), 12995 states have internal predecessors, (23799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:37,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12996 states to 12996 states and 23799 transitions. [2021-11-07 01:11:37,582 INFO L78 Accepts]: Start accepts. Automaton has 12996 states and 23799 transitions. Word has length 65 [2021-11-07 01:11:37,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:37,582 INFO L470 AbstractCegarLoop]: Abstraction has 12996 states and 23799 transitions. [2021-11-07 01:11:37,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:37,583 INFO L276 IsEmpty]: Start isEmpty. Operand 12996 states and 23799 transitions. [2021-11-07 01:11:37,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:11:37,596 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:37,596 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:37,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-07 01:11:37,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:37,804 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 01:11:37,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:37,804 INFO L85 PathProgramCache]: Analyzing trace with hash 477477316, now seen corresponding path program 1 times [2021-11-07 01:11:37,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:37,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2015873145] [2021-11-07 01:11:37,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:37,806 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:37,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:37,807 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:37,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:11:38,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:38,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:11:38,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:38,658 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 01:11:38,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:38,896 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 01:11:38,896 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:38,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2015873145] [2021-11-07 01:11:38,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2015873145] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:38,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:38,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:11:38,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056290525] [2021-11-07 01:11:38,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:11:38,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:38,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:11:38,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:11:38,898 INFO L87 Difference]: Start difference. First operand 12996 states and 23799 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:42,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:42,038 INFO L93 Difference]: Finished difference Result 32157 states and 58888 transitions. [2021-11-07 01:11:42,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:11:42,038 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 01:11:42,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:42,094 INFO L225 Difference]: With dead ends: 32157 [2021-11-07 01:11:42,094 INFO L226 Difference]: Without dead ends: 19454 [2021-11-07 01:11:42,112 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:11:42,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19454 states. [2021-11-07 01:11:43,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19454 to 12963. [2021-11-07 01:11:43,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12963 states, 12957 states have (on average 1.826580226904376) internal successors, (23667), 12962 states have internal predecessors, (23667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:43,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12963 states to 12963 states and 23667 transitions. [2021-11-07 01:11:43,112 INFO L78 Accepts]: Start accepts. Automaton has 12963 states and 23667 transitions. Word has length 66 [2021-11-07 01:11:43,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:43,112 INFO L470 AbstractCegarLoop]: Abstraction has 12963 states and 23667 transitions. [2021-11-07 01:11:43,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:43,112 INFO L276 IsEmpty]: Start isEmpty. Operand 12963 states and 23667 transitions. [2021-11-07 01:11:43,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:11:43,118 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:43,119 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:43,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:43,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:43,332 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 01:11:43,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:43,332 INFO L85 PathProgramCache]: Analyzing trace with hash -504434267, now seen corresponding path program 1 times [2021-11-07 01:11:43,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:43,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1293105001] [2021-11-07 01:11:43,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:43,333 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:43,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:43,335 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:43,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:11:44,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:44,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:44,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:44,179 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 01:11:44,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:44,344 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 01:11:44,344 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:44,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1293105001] [2021-11-07 01:11:44,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1293105001] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:44,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:44,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:11:44,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220991597] [2021-11-07 01:11:44,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:11:44,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:44,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:11:44,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:44,346 INFO L87 Difference]: Start difference. First operand 12963 states and 23667 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:45,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:45,269 INFO L93 Difference]: Finished difference Result 38096 states and 69628 transitions. [2021-11-07 01:11:45,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:45,269 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 01:11:45,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:45,319 INFO L225 Difference]: With dead ends: 38096 [2021-11-07 01:11:45,319 INFO L226 Difference]: Without dead ends: 25312 [2021-11-07 01:11:45,333 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:45,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25312 states. [2021-11-07 01:11:46,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25312 to 24933. [2021-11-07 01:11:46,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24933 states, 24927 states have (on average 1.8275765234484695) internal successors, (45556), 24932 states have internal predecessors, (45556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:46,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24933 states to 24933 states and 45556 transitions. [2021-11-07 01:11:46,958 INFO L78 Accepts]: Start accepts. Automaton has 24933 states and 45556 transitions. Word has length 66 [2021-11-07 01:11:46,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:46,959 INFO L470 AbstractCegarLoop]: Abstraction has 24933 states and 45556 transitions. [2021-11-07 01:11:46,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:46,959 INFO L276 IsEmpty]: Start isEmpty. Operand 24933 states and 45556 transitions. [2021-11-07 01:11:46,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:11:46,968 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:46,968 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 01:11:46,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:47,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:47,185 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 01:11:47,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:47,185 INFO L85 PathProgramCache]: Analyzing trace with hash 580534610, now seen corresponding path program 1 times [2021-11-07 01:11:47,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:47,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1992114571] [2021-11-07 01:11:47,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:47,186 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:47,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:47,187 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:47,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:11:47,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:47,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:11:47,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:47,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:47,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:48,106 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 01:11:48,106 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:48,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1992114571] [2021-11-07 01:11:48,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1992114571] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:48,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:48,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:11:48,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216151090] [2021-11-07 01:11:48,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:11:48,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:48,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:11:48,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:48,108 INFO L87 Difference]: Start difference. First operand 24933 states and 45556 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 01:11:49,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:49,674 INFO L93 Difference]: Finished difference Result 68645 states and 125031 transitions. [2021-11-07 01:11:49,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:49,674 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 01:11:49,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:49,735 INFO L225 Difference]: With dead ends: 68645 [2021-11-07 01:11:49,735 INFO L226 Difference]: Without dead ends: 43938 [2021-11-07 01:11:49,763 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 01:11:49,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43938 states. [2021-11-07 01:11:52,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43938 to 43559. [2021-11-07 01:11:52,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43559 states, 43553 states have (on average 1.8160172663191974) internal successors, (79093), 43558 states have internal predecessors, (79093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:52,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43559 states to 43559 states and 79093 transitions. [2021-11-07 01:11:52,242 INFO L78 Accepts]: Start accepts. Automaton has 43559 states and 79093 transitions. Word has length 67 [2021-11-07 01:11:52,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:52,243 INFO L470 AbstractCegarLoop]: Abstraction has 43559 states and 79093 transitions. [2021-11-07 01:11:52,243 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 01:11:52,243 INFO L276 IsEmpty]: Start isEmpty. Operand 43559 states and 79093 transitions. [2021-11-07 01:11:52,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:11:52,251 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:52,251 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:52,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:52,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:52,466 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 01:11:52,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:52,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1443027266, now seen corresponding path program 1 times [2021-11-07 01:11:52,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:52,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1005819305] [2021-11-07 01:11:52,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:52,467 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:52,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:52,469 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:52,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:11:53,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:53,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:11:53,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:53,264 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 01:11:53,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:53,463 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 01:11:53,463 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:53,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1005819305] [2021-11-07 01:11:53,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1005819305] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:53,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:53,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:11:53,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292727949] [2021-11-07 01:11:53,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:11:53,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:53,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:11:53,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:11:53,465 INFO L87 Difference]: Start difference. First operand 43559 states and 79093 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:00,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:00,214 INFO L93 Difference]: Finished difference Result 169516 states and 307694 transitions. [2021-11-07 01:12:00,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:12:00,215 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:12:00,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:00,429 INFO L225 Difference]: With dead ends: 169516 [2021-11-07 01:12:00,430 INFO L226 Difference]: Without dead ends: 126249 [2021-11-07 01:12:00,469 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:12:00,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126249 states. [2021-11-07 01:12:03,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126249 to 43301. [2021-11-07 01:12:03,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43301 states, 43295 states have (on average 1.8030026561958656) internal successors, (78061), 43300 states have internal predecessors, (78061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:03,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43301 states to 43301 states and 78061 transitions. [2021-11-07 01:12:03,731 INFO L78 Accepts]: Start accepts. Automaton has 43301 states and 78061 transitions. Word has length 68 [2021-11-07 01:12:03,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:03,732 INFO L470 AbstractCegarLoop]: Abstraction has 43301 states and 78061 transitions. [2021-11-07 01:12:03,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:03,732 INFO L276 IsEmpty]: Start isEmpty. Operand 43301 states and 78061 transitions. [2021-11-07 01:12:03,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:12:03,739 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:03,739 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:03,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-07 01:12:03,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:03,948 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 01:12:03,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:03,948 INFO L85 PathProgramCache]: Analyzing trace with hash -208943392, now seen corresponding path program 1 times [2021-11-07 01:12:03,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:03,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632885784] [2021-11-07 01:12:03,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:03,949 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:03,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:03,949 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:03,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:12:04,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:04,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:12:04,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:04,699 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 01:12:04,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:04,839 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 01:12:04,839 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:04,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632885784] [2021-11-07 01:12:04,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632885784] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:04,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:04,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:12:04,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566647189] [2021-11-07 01:12:04,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:12:04,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:04,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:12:04,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:12:04,841 INFO L87 Difference]: Start difference. First operand 43301 states and 78061 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:06,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:06,927 INFO L93 Difference]: Finished difference Result 86683 states and 156251 transitions. [2021-11-07 01:12:06,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:12:06,929 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:12:06,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:06,990 INFO L225 Difference]: With dead ends: 86683 [2021-11-07 01:12:06,990 INFO L226 Difference]: Without dead ends: 43680 [2021-11-07 01:12:07,014 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:12:07,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43680 states. [2021-11-07 01:12:09,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43680 to 43301. [2021-11-07 01:12:09,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43301 states, 43295 states have (on average 1.8000461947107056) internal successors, (77933), 43300 states have internal predecessors, (77933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:09,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43301 states to 43301 states and 77933 transitions. [2021-11-07 01:12:09,135 INFO L78 Accepts]: Start accepts. Automaton has 43301 states and 77933 transitions. Word has length 68 [2021-11-07 01:12:09,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:09,135 INFO L470 AbstractCegarLoop]: Abstraction has 43301 states and 77933 transitions. [2021-11-07 01:12:09,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:09,135 INFO L276 IsEmpty]: Start isEmpty. Operand 43301 states and 77933 transitions. [2021-11-07 01:12:09,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:12:09,142 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:09,143 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 01:12:09,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-07 01:12:09,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:09,362 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 01:12:09,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:09,362 INFO L85 PathProgramCache]: Analyzing trace with hash -639553133, now seen corresponding path program 1 times [2021-11-07 01:12:09,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:09,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1355624405] [2021-11-07 01:12:09,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:09,363 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:09,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:09,364 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:09,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f5be13b-2b1a-4bfa-85eb-df34fa2ae00e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:12:10,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:10,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:12:10,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:10,208 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 01:12:10,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:10,386 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 01:12:10,387 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:10,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1355624405] [2021-11-07 01:12:10,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1355624405] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:10,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:10,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:12:10,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484298543] [2021-11-07 01:12:10,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:12:10,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:10,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:12:10,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:12:10,389 INFO L87 Difference]: Start difference. First operand 43301 states and 77933 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 01:12:13,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:13,624 INFO L93 Difference]: Finished difference Result 121413 states and 218277 transitions. [2021-11-07 01:12:13,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:12:13,624 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 01:12:13,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:13,747 INFO L225 Difference]: With dead ends: 121413 [2021-11-07 01:12:13,747 INFO L226 Difference]: Without dead ends: 78370 [2021-11-07 01:12:13,773 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 01:12:13,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78370 states.