./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec6_product32.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/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_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec6_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/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_6cf58645-147c-4d40-9a0e-66cf87882bea/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 67a5f870249755b02192cafa5b1141561e5c0ebfbfae7faed4cfc72be0ad5c3d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:42:10,327 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:42:10,330 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:42:10,381 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:42:10,382 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:42:10,386 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:42:10,388 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:42:10,392 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:42:10,395 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:42:10,400 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:42:10,402 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:42:10,403 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:42:10,404 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:42:10,407 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:42:10,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:42:10,416 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:42:10,418 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:42:10,419 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:42:10,422 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:42:10,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:42:10,431 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:42:10,432 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:42:10,435 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:42:10,436 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:42:10,445 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:42:10,446 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:42:10,446 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:42:10,448 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:42:10,449 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:42:10,450 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:42:10,450 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:42:10,451 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:42:10,453 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:42:10,455 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:42:10,456 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:42:10,456 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:42:10,457 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:42:10,457 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:42:10,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:42:10,458 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:42:10,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:42:10,460 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:42:10,506 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:42:10,506 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:42:10,507 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:42:10,508 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:42:10,508 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:42:10,508 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:42:10,508 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:42:10,509 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:42:10,509 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:42:10,509 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:42:10,510 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:42:10,510 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:42:10,511 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:42:10,511 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:42:10,511 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:42:10,512 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:42:10,512 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:42:10,513 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:42:10,513 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:42:10,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:42:10,513 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:42:10,514 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:42:10,514 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:42:10,514 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:42:10,514 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:42:10,514 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:42:10,515 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:42:10,515 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:42:10,515 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:42:10,517 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:42:10,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:42:10,517 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:42:10,518 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:42:10,518 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:42:10,518 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:42:10,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:42:10,518 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:42:10,519 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:42:10,519 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:42:10,519 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_6cf58645-147c-4d40-9a0e-66cf87882bea/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67a5f870249755b02192cafa5b1141561e5c0ebfbfae7faed4cfc72be0ad5c3d [2021-11-07 01:42:10,808 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:42:10,837 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:42:10,840 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:42:10,842 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:42:10,843 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:42:10,844 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec6_product32.cil.c [2021-11-07 01:42:10,926 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/data/ea871c7e2/0ca3cc6737784dcdb76064766acee879/FLAG4e6206211 [2021-11-07 01:42:11,536 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:42:11,537 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/sv-benchmarks/c/product-lines/email_spec6_product32.cil.c [2021-11-07 01:42:11,561 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/data/ea871c7e2/0ca3cc6737784dcdb76064766acee879/FLAG4e6206211 [2021-11-07 01:42:11,805 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/data/ea871c7e2/0ca3cc6737784dcdb76064766acee879 [2021-11-07 01:42:11,807 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:42:11,809 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:42:11,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:42:11,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:42:11,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:42:11,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:42:11" (1/1) ... [2021-11-07 01:42:11,816 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b963f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:11, skipping insertion in model container [2021-11-07 01:42:11,816 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:42:11" (1/1) ... [2021-11-07 01:42:11,823 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:42:11,900 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:42:12,348 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/sv-benchmarks/c/product-lines/email_spec6_product32.cil.c[40215,40228] [2021-11-07 01:42:12,583 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:42:12,597 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 01:42:12,600 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5cc4e534 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:12, skipping insertion in model container [2021-11-07 01:42:12,600 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:42:12,600 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:42:12,603 INFO L168 Benchmark]: Toolchain (without parser) took 792.78 ms. Allocated memory is still 102.8 MB. Free memory was 61.2 MB in the beginning and 63.5 MB in the end (delta: -2.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:42:12,605 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 102.8 MB. Free memory is still 80.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:42:12,607 INFO L168 Benchmark]: CACSL2BoogieTranslator took 790.06 ms. Allocated memory is still 102.8 MB. Free memory was 61.0 MB in the beginning and 63.5 MB in the end (delta: -2.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:42:12,609 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 102.8 MB. Free memory is still 80.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 790.06 ms. Allocated memory is still 102.8 MB. Free memory was 61.0 MB in the beginning and 63.5 MB in the end (delta: -2.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1825]: 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_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/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_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec6_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/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_6cf58645-147c-4d40-9a0e-66cf87882bea/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 67a5f870249755b02192cafa5b1141561e5c0ebfbfae7faed4cfc72be0ad5c3d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:42:14,762 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:42:14,766 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:42:14,807 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:42:14,808 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:42:14,809 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:42:14,811 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:42:14,813 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:42:14,816 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:42:14,817 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:42:14,818 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:42:14,820 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:42:14,820 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:42:14,822 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:42:14,823 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:42:14,825 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:42:14,826 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:42:14,826 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:42:14,833 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:42:14,841 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:42:14,843 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:42:14,847 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:42:14,849 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:42:14,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:42:14,855 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:42:14,859 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:42:14,860 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:42:14,861 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:42:14,863 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:42:14,864 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:42:14,864 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:42:14,865 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:42:14,867 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:42:14,868 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:42:14,869 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:42:14,870 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:42:14,871 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:42:14,871 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:42:14,871 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:42:14,873 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:42:14,874 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:42:14,875 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:42:14,918 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:42:14,919 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:42:14,920 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:42:14,920 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:42:14,921 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:42:14,921 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:42:14,921 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:42:14,921 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:42:14,922 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:42:14,923 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:42:14,924 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:42:14,924 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:42:14,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:42:14,925 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:42:14,925 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:42:14,925 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:42:14,925 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:42:14,926 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:42:14,926 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:42:14,926 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:42:14,926 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:42:14,926 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:42:14,927 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:42:14,927 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:42:14,927 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:42:14,927 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:42:14,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:42:14,928 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:42:14,928 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:42:14,928 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:42:14,928 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:42:14,929 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:42:14,929 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:42:14,929 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:42:14,930 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:42:14,930 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_6cf58645-147c-4d40-9a0e-66cf87882bea/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67a5f870249755b02192cafa5b1141561e5c0ebfbfae7faed4cfc72be0ad5c3d [2021-11-07 01:42:15,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:42:15,349 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:42:15,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:42:15,353 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:42:15,354 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:42:15,355 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec6_product32.cil.c [2021-11-07 01:42:15,422 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/data/45964e2a2/c6bdb222f3e84accbf7c81fe6d5060c5/FLAG8967e2851 [2021-11-07 01:42:16,065 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:42:16,066 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/sv-benchmarks/c/product-lines/email_spec6_product32.cil.c [2021-11-07 01:42:16,098 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/data/45964e2a2/c6bdb222f3e84accbf7c81fe6d5060c5/FLAG8967e2851 [2021-11-07 01:42:16,238 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/data/45964e2a2/c6bdb222f3e84accbf7c81fe6d5060c5 [2021-11-07 01:42:16,246 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:42:16,250 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:42:16,253 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:42:16,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:42:16,257 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:42:16,258 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:42:16" (1/1) ... [2021-11-07 01:42:16,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39434fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:16, skipping insertion in model container [2021-11-07 01:42:16,260 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:42:16" (1/1) ... [2021-11-07 01:42:16,268 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:42:16,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:42:16,839 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_6cf58645-147c-4d40-9a0e-66cf87882bea/sv-benchmarks/c/product-lines/email_spec6_product32.cil.c[40215,40228] [2021-11-07 01:42:17,107 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:42:17,125 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:42:17,152 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:42:17,236 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_6cf58645-147c-4d40-9a0e-66cf87882bea/sv-benchmarks/c/product-lines/email_spec6_product32.cil.c[40215,40228] [2021-11-07 01:42:17,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:42:17,299 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:42:17,342 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_6cf58645-147c-4d40-9a0e-66cf87882bea/sv-benchmarks/c/product-lines/email_spec6_product32.cil.c[40215,40228] [2021-11-07 01:42:17,380 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:42:17,443 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:42:17,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:17 WrapperNode [2021-11-07 01:42:17,443 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:42:17,445 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:42:17,445 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:42:17,445 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:42:17,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:17" (1/1) ... [2021-11-07 01:42:17,546 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:17" (1/1) ... [2021-11-07 01:42:17,742 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:42:17,743 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:42:17,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:42:17,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:42:17,753 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:17" (1/1) ... [2021-11-07 01:42:17,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:17" (1/1) ... [2021-11-07 01:42:17,811 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:17" (1/1) ... [2021-11-07 01:42:17,812 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:17" (1/1) ... [2021-11-07 01:42:17,892 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:17" (1/1) ... [2021-11-07 01:42:17,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:17" (1/1) ... [2021-11-07 01:42:17,949 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:17" (1/1) ... [2021-11-07 01:42:17,968 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:42:17,969 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:42:17,969 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:42:17,969 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:42:17,971 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:17" (1/1) ... [2021-11-07 01:42:17,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:42:17,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:42:18,022 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:42:18,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:42:18,063 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:42:18,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:42:18,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:42:18,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:42:18,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:42:24,280 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:42:24,280 INFO L299 CfgBuilder]: Removed 717 assume(true) statements. [2021-11-07 01:42:24,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:42:24 BoogieIcfgContainer [2021-11-07 01:42:24,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:42:24,287 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:42:24,287 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:42:24,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:42:24,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:42:16" (1/3) ... [2021-11-07 01:42:24,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@358fddb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:42:24, skipping insertion in model container [2021-11-07 01:42:24,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:17" (2/3) ... [2021-11-07 01:42:24,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@358fddb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:42:24, skipping insertion in model container [2021-11-07 01:42:24,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:42:24" (3/3) ... [2021-11-07 01:42:24,294 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec6_product32.cil.c [2021-11-07 01:42:24,300 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:42:24,300 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:42:24,369 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:42:24,377 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 01:42:24,377 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:42:24,419 INFO L276 IsEmpty]: Start isEmpty. Operand has 1122 states, 1115 states have (on average 1.7506726457399102) internal successors, (1952), 1121 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:24,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:42:24,436 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:24,436 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] [2021-11-07 01:42:24,437 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 01:42:24,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:24,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1046797102, now seen corresponding path program 1 times [2021-11-07 01:42:24,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:24,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1873173934] [2021-11-07 01:42:24,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:24,455 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:24,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:24,457 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:24,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:42:24,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:24,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:42:24,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:25,135 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 01:42:25,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:25,296 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 01:42:25,297 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:25,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1873173934] [2021-11-07 01:42:25,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1873173934] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:25,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:25,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:42:25,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221667430] [2021-11-07 01:42:25,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:42:25,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:25,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:42:25,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:42:25,328 INFO L87 Difference]: Start difference. First operand has 1122 states, 1115 states have (on average 1.7506726457399102) internal successors, (1952), 1121 states have internal predecessors, (1952), 0 states have call successors, (0), 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 28.5) internal successors, (57), 2 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:25,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:25,471 INFO L93 Difference]: Finished difference Result 1959 states and 3381 transitions. [2021-11-07 01:42:25,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:42:25,473 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2021-11-07 01:42:25,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:25,502 INFO L225 Difference]: With dead ends: 1959 [2021-11-07 01:42:25,502 INFO L226 Difference]: Without dead ends: 976 [2021-11-07 01:42:25,513 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 112 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 01:42:25,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-11-07 01:42:25,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 976. [2021-11-07 01:42:25,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 970 states have (on average 1.745360824742268) internal successors, (1693), 975 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:25,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1693 transitions. [2021-11-07 01:42:25,628 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1693 transitions. Word has length 57 [2021-11-07 01:42:25,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:25,629 INFO L470 AbstractCegarLoop]: Abstraction has 976 states and 1693 transitions. [2021-11-07 01:42:25,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 28.5) internal successors, (57), 2 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:25,629 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1693 transitions. [2021-11-07 01:42:25,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:42:25,640 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:25,640 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] [2021-11-07 01:42:25,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:25,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:25,855 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 01:42:25,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:25,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1092862106, now seen corresponding path program 1 times [2021-11-07 01:42:25,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:25,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776703055] [2021-11-07 01:42:25,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:25,858 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:25,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:25,859 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:25,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:42:26,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:26,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:42:26,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:26,472 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 01:42:26,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:26,628 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 01:42:26,628 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:26,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776703055] [2021-11-07 01:42:26,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776703055] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:26,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:26,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:42:26,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217082569] [2021-11-07 01:42:26,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:42:26,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:26,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:42:26,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:42:26,636 INFO L87 Difference]: Start difference. First operand 976 states and 1693 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 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 01:42:26,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:26,824 INFO L93 Difference]: Finished difference Result 2898 states and 5031 transitions. [2021-11-07 01:42:26,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:42:26,825 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 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 58 [2021-11-07 01:42:26,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:26,842 INFO L225 Difference]: With dead ends: 2898 [2021-11-07 01:42:26,843 INFO L226 Difference]: Without dead ends: 1937 [2021-11-07 01:42:26,846 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 112 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 01:42:26,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2021-11-07 01:42:26,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 975. [2021-11-07 01:42:26,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 969 states have (on average 1.7420020639834881) internal successors, (1688), 974 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:26,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 1688 transitions. [2021-11-07 01:42:26,912 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 1688 transitions. Word has length 58 [2021-11-07 01:42:26,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:26,913 INFO L470 AbstractCegarLoop]: Abstraction has 975 states and 1688 transitions. [2021-11-07 01:42:26,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 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 01:42:26,914 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 1688 transitions. [2021-11-07 01:42:26,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:42:26,921 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:26,921 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 01:42:26,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:27,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:27,144 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 01:42:27,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:27,145 INFO L85 PathProgramCache]: Analyzing trace with hash 321097716, now seen corresponding path program 1 times [2021-11-07 01:42:27,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:27,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521097329] [2021-11-07 01:42:27,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:27,147 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:27,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:27,148 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:27,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:42:27,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:27,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:42:27,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:27,772 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 01:42:27,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:27,966 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 01:42:27,967 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:27,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521097329] [2021-11-07 01:42:27,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521097329] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:27,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:27,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:42:27,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756063539] [2021-11-07 01:42:27,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:42:27,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:27,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:42:27,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:42:27,970 INFO L87 Difference]: Start difference. First operand 975 states and 1688 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 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 01:42:28,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:28,431 INFO L93 Difference]: Finished difference Result 3817 states and 6614 transitions. [2021-11-07 01:42:28,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:42:28,432 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 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 60 [2021-11-07 01:42:28,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:28,451 INFO L225 Difference]: With dead ends: 3817 [2021-11-07 01:42:28,451 INFO L226 Difference]: Without dead ends: 2860 [2021-11-07 01:42:28,454 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 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 01:42:28,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2860 states. [2021-11-07 01:42:28,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2860 to 974. [2021-11-07 01:42:28,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 968 states have (on average 1.7396694214876034) internal successors, (1684), 973 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:28,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1684 transitions. [2021-11-07 01:42:28,538 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1684 transitions. Word has length 60 [2021-11-07 01:42:28,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:28,539 INFO L470 AbstractCegarLoop]: Abstraction has 974 states and 1684 transitions. [2021-11-07 01:42:28,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 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 01:42:28,541 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1684 transitions. [2021-11-07 01:42:28,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:42:28,542 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:28,543 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 01:42:28,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:28,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:28,756 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 01:42:28,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:28,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1587727935, now seen corresponding path program 1 times [2021-11-07 01:42:28,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:28,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [230707798] [2021-11-07 01:42:28,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:28,758 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:28,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:28,760 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:28,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:42:29,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:29,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:42:29,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:29,438 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 01:42:29,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:29,590 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 01:42:29,590 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:29,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [230707798] [2021-11-07 01:42:29,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [230707798] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:29,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:29,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:42:29,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074679459] [2021-11-07 01:42:29,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:42:29,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:29,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:42:29,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:42:29,593 INFO L87 Difference]: Start difference. First operand 974 states and 1684 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 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 01:42:29,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:29,701 INFO L93 Difference]: Finished difference Result 1945 states and 3365 transitions. [2021-11-07 01:42:29,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:42:29,702 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 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 61 [2021-11-07 01:42:29,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:29,708 INFO L225 Difference]: With dead ends: 1945 [2021-11-07 01:42:29,708 INFO L226 Difference]: Without dead ends: 979 [2021-11-07 01:42:29,710 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 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 01:42:29,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2021-11-07 01:42:29,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 974. [2021-11-07 01:42:29,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 968 states have (on average 1.7365702479338843) internal successors, (1681), 973 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:29,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1681 transitions. [2021-11-07 01:42:29,774 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1681 transitions. Word has length 61 [2021-11-07 01:42:29,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:29,774 INFO L470 AbstractCegarLoop]: Abstraction has 974 states and 1681 transitions. [2021-11-07 01:42:29,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 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 01:42:29,775 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1681 transitions. [2021-11-07 01:42:29,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:42:29,776 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:29,776 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 01:42:29,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:29,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:29,991 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 01:42:29,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:29,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1188420108, now seen corresponding path program 1 times [2021-11-07 01:42:29,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:29,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1898525296] [2021-11-07 01:42:29,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:29,992 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:29,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:29,994 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:30,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:42:30,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:30,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:42:30,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:30,642 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 01:42:30,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:30,838 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 01:42:30,838 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:30,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1898525296] [2021-11-07 01:42:30,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1898525296] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:30,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:30,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:42:30,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423081501] [2021-11-07 01:42:30,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:42:30,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:30,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:42:30,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:42:30,840 INFO L87 Difference]: Start difference. First operand 974 states and 1681 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 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 01:42:31,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:31,229 INFO L93 Difference]: Finished difference Result 3804 states and 6590 transitions. [2021-11-07 01:42:31,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:42:31,230 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 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 62 [2021-11-07 01:42:31,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:31,248 INFO L225 Difference]: With dead ends: 3804 [2021-11-07 01:42:31,248 INFO L226 Difference]: Without dead ends: 2856 [2021-11-07 01:42:31,253 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 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 01:42:31,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2856 states. [2021-11-07 01:42:31,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2856 to 974. [2021-11-07 01:42:31,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 968 states have (on average 1.7334710743801653) internal successors, (1678), 973 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:31,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1678 transitions. [2021-11-07 01:42:31,382 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1678 transitions. Word has length 62 [2021-11-07 01:42:31,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:31,382 INFO L470 AbstractCegarLoop]: Abstraction has 974 states and 1678 transitions. [2021-11-07 01:42:31,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 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 01:42:31,383 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1678 transitions. [2021-11-07 01:42:31,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:42:31,385 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:31,385 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 01:42:31,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:31,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:31,600 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 01:42:31,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:31,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1409371279, now seen corresponding path program 1 times [2021-11-07 01:42:31,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:31,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [477134486] [2021-11-07 01:42:31,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:31,602 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:31,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:31,605 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:31,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:42:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:32,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:42:32,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:32,285 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 01:42:32,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:32,436 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 01:42:32,436 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:32,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [477134486] [2021-11-07 01:42:32,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [477134486] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:32,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:32,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:42:32,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638846980] [2021-11-07 01:42:32,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:42:32,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:32,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:42:32,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:42:32,439 INFO L87 Difference]: Start difference. First operand 974 states and 1678 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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 01:42:32,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:32,626 INFO L93 Difference]: Finished difference Result 2613 states and 4499 transitions. [2021-11-07 01:42:32,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:42:32,626 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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 64 [2021-11-07 01:42:32,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:32,638 INFO L225 Difference]: With dead ends: 2613 [2021-11-07 01:42:32,638 INFO L226 Difference]: Without dead ends: 1922 [2021-11-07 01:42:32,640 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 124 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 01:42:32,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2021-11-07 01:42:32,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 1231. [2021-11-07 01:42:32,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1225 states have (on average 1.7559183673469387) internal successors, (2151), 1230 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:32,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 2151 transitions. [2021-11-07 01:42:32,764 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 2151 transitions. Word has length 64 [2021-11-07 01:42:32,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:32,765 INFO L470 AbstractCegarLoop]: Abstraction has 1231 states and 2151 transitions. [2021-11-07 01:42:32,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 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 01:42:32,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 2151 transitions. [2021-11-07 01:42:32,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:42:32,768 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:32,768 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:32,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:32,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:32,983 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 01:42:32,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:32,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1039162048, now seen corresponding path program 1 times [2021-11-07 01:42:32,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:32,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1304414689] [2021-11-07 01:42:32,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:32,985 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:32,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:32,988 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:32,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:42:33,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:33,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:42:33,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:33,698 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 01:42:33,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:33,886 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 01:42:33,886 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:33,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1304414689] [2021-11-07 01:42:33,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1304414689] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:33,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:33,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:42:33,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550508695] [2021-11-07 01:42:33,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:42:33,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:33,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:42:33,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:42:33,888 INFO L87 Difference]: Start difference. First operand 1231 states and 2151 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:34,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:34,072 INFO L93 Difference]: Finished difference Result 3274 states and 5719 transitions. [2021-11-07 01:42:34,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:42:34,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 01:42:34,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:34,085 INFO L225 Difference]: With dead ends: 3274 [2021-11-07 01:42:34,085 INFO L226 Difference]: Without dead ends: 2127 [2021-11-07 01:42:34,087 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 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 01:42:34,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2021-11-07 01:42:34,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 1436. [2021-11-07 01:42:34,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1430 states have (on average 1.7671328671328672) internal successors, (2527), 1435 states have internal predecessors, (2527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:34,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 2527 transitions. [2021-11-07 01:42:34,202 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 2527 transitions. Word has length 76 [2021-11-07 01:42:34,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:34,202 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 2527 transitions. [2021-11-07 01:42:34,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:34,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 2527 transitions. [2021-11-07 01:42:34,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:42:34,205 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:34,205 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:34,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:34,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:34,420 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 01:42:34,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:34,421 INFO L85 PathProgramCache]: Analyzing trace with hash -461239359, now seen corresponding path program 1 times [2021-11-07 01:42:34,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:34,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [825443443] [2021-11-07 01:42:34,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:34,422 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:34,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:34,423 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:34,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:42:34,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:34,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:42:34,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:35,157 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 01:42:35,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:35,365 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 01:42:35,365 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:35,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [825443443] [2021-11-07 01:42:35,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [825443443] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:35,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:35,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:42:35,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036443715] [2021-11-07 01:42:35,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:42:35,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:35,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:42:35,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:42:35,367 INFO L87 Difference]: Start difference. First operand 1436 states and 2527 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:35,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:35,578 INFO L93 Difference]: Finished difference Result 3921 states and 6912 transitions. [2021-11-07 01:42:35,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:42:35,578 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-11-07 01:42:35,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:35,594 INFO L225 Difference]: With dead ends: 3921 [2021-11-07 01:42:35,594 INFO L226 Difference]: Without dead ends: 2577 [2021-11-07 01:42:35,597 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 151 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 01:42:35,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2577 states. [2021-11-07 01:42:35,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2577 to 1886. [2021-11-07 01:42:35,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1880 states have (on average 1.7845744680851063) internal successors, (3355), 1885 states have internal predecessors, (3355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:35,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 3355 transitions. [2021-11-07 01:42:35,746 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 3355 transitions. Word has length 77 [2021-11-07 01:42:35,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:35,746 INFO L470 AbstractCegarLoop]: Abstraction has 1886 states and 3355 transitions. [2021-11-07 01:42:35,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:35,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 3355 transitions. [2021-11-07 01:42:35,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:42:35,751 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:35,751 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:35,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:35,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:35,968 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 01:42:35,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:35,969 INFO L85 PathProgramCache]: Analyzing trace with hash 2081993682, now seen corresponding path program 1 times [2021-11-07 01:42:35,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:35,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [893888528] [2021-11-07 01:42:35,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:35,970 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:35,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:35,970 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:35,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:42:36,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:36,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:42:36,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:36,694 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 01:42:36,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:36,848 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 01:42:36,849 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:36,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [893888528] [2021-11-07 01:42:36,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [893888528] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:36,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:36,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:42:36,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182390237] [2021-11-07 01:42:36,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:42:36,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:36,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:42:36,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:42:36,851 INFO L87 Difference]: Start difference. First operand 1886 states and 3355 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:37,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:37,091 INFO L93 Difference]: Finished difference Result 5251 states and 9365 transitions. [2021-11-07 01:42:37,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:42:37,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-11-07 01:42:37,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:37,112 INFO L225 Difference]: With dead ends: 5251 [2021-11-07 01:42:37,112 INFO L226 Difference]: Without dead ends: 3465 [2021-11-07 01:42:37,116 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 153 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 01:42:37,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3465 states. [2021-11-07 01:42:37,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3465 to 2774. [2021-11-07 01:42:37,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2774 states, 2768 states have (on average 1.8027456647398843) internal successors, (4990), 2773 states have internal predecessors, (4990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:37,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2774 states to 2774 states and 4990 transitions. [2021-11-07 01:42:37,362 INFO L78 Accepts]: Start accepts. Automaton has 2774 states and 4990 transitions. Word has length 78 [2021-11-07 01:42:37,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:37,363 INFO L470 AbstractCegarLoop]: Abstraction has 2774 states and 4990 transitions. [2021-11-07 01:42:37,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:37,363 INFO L276 IsEmpty]: Start isEmpty. Operand 2774 states and 4990 transitions. [2021-11-07 01:42:37,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:42:37,369 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:37,369 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:37,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:37,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:37,587 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 01:42:37,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:37,588 INFO L85 PathProgramCache]: Analyzing trace with hash -17414574, now seen corresponding path program 1 times [2021-11-07 01:42:37,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:37,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [244897441] [2021-11-07 01:42:37,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:37,589 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:37,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:37,589 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:37,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:42:38,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:38,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:42:38,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:38,351 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 01:42:38,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:38,562 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 01:42:38,562 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:38,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [244897441] [2021-11-07 01:42:38,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [244897441] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:38,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:38,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:42:38,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218179345] [2021-11-07 01:42:38,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:42:38,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:38,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:42:38,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:42:38,565 INFO L87 Difference]: Start difference. First operand 2774 states and 4990 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:38,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:38,932 INFO L93 Difference]: Finished difference Result 7651 states and 13789 transitions. [2021-11-07 01:42:38,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:42:38,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 01:42:38,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:38,976 INFO L225 Difference]: With dead ends: 7651 [2021-11-07 01:42:38,976 INFO L226 Difference]: Without dead ends: 5011 [2021-11-07 01:42:38,981 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 155 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 01:42:38,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5011 states. [2021-11-07 01:42:39,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5011 to 4320. [2021-11-07 01:42:39,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4320 states, 4314 states have (on average 1.8161798794622162) internal successors, (7835), 4319 states have internal predecessors, (7835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:39,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4320 states to 4320 states and 7835 transitions. [2021-11-07 01:42:39,302 INFO L78 Accepts]: Start accepts. Automaton has 4320 states and 7835 transitions. Word has length 79 [2021-11-07 01:42:39,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:39,303 INFO L470 AbstractCegarLoop]: Abstraction has 4320 states and 7835 transitions. [2021-11-07 01:42:39,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:39,303 INFO L276 IsEmpty]: Start isEmpty. Operand 4320 states and 7835 transitions. [2021-11-07 01:42:39,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 01:42:39,313 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:39,313 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:39,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:39,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:39,529 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 01:42:39,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:39,529 INFO L85 PathProgramCache]: Analyzing trace with hash -98928319, now seen corresponding path program 1 times [2021-11-07 01:42:39,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:39,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1475178626] [2021-11-07 01:42:39,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:39,530 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:39,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:39,531 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:39,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:42:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:40,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:42:40,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:40,298 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 01:42:40,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:40,481 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 01:42:40,482 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:40,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1475178626] [2021-11-07 01:42:40,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1475178626] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:40,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:40,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:42:40,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554968358] [2021-11-07 01:42:40,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:42:40,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:40,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:42:40,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:42:40,484 INFO L87 Difference]: Start difference. First operand 4320 states and 7835 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:40,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:40,934 INFO L93 Difference]: Finished difference Result 12005 states and 21807 transitions. [2021-11-07 01:42:40,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:42:40,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-07 01:42:40,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:40,971 INFO L225 Difference]: With dead ends: 12005 [2021-11-07 01:42:40,971 INFO L226 Difference]: Without dead ends: 7853 [2021-11-07 01:42:40,978 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 157 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 01:42:40,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7853 states. [2021-11-07 01:42:41,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7853 to 7162. [2021-11-07 01:42:41,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7162 states, 7156 states have (on average 1.8250419228619341) internal successors, (13060), 7161 states have internal predecessors, (13060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:41,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7162 states to 7162 states and 13060 transitions. [2021-11-07 01:42:41,540 INFO L78 Accepts]: Start accepts. Automaton has 7162 states and 13060 transitions. Word has length 80 [2021-11-07 01:42:41,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:41,541 INFO L470 AbstractCegarLoop]: Abstraction has 7162 states and 13060 transitions. [2021-11-07 01:42:41,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:41,542 INFO L276 IsEmpty]: Start isEmpty. Operand 7162 states and 13060 transitions. [2021-11-07 01:42:41,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:42:41,552 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:41,552 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:41,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:41,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:41,768 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 01:42:41,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:41,768 INFO L85 PathProgramCache]: Analyzing trace with hash -606070559, now seen corresponding path program 1 times [2021-11-07 01:42:41,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:41,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [494532981] [2021-11-07 01:42:41,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:41,769 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:41,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:41,770 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:41,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:42:42,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:42,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:42:42,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:42,535 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 01:42:42,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:42,695 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 01:42:42,695 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:42,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [494532981] [2021-11-07 01:42:42,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [494532981] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:42,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:42,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:42:42,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358325977] [2021-11-07 01:42:42,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:42:42,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:42,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:42:42,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:42:42,697 INFO L87 Difference]: Start difference. First operand 7162 states and 13060 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:43,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:43,303 INFO L93 Difference]: Finished difference Result 20989 states and 38324 transitions. [2021-11-07 01:42:43,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:42:43,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-11-07 01:42:43,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:43,344 INFO L225 Difference]: With dead ends: 20989 [2021-11-07 01:42:43,344 INFO L226 Difference]: Without dead ends: 13999 [2021-11-07 01:42:43,353 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 159 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 01:42:43,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13999 states. [2021-11-07 01:42:44,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13999 to 13308. [2021-11-07 01:42:44,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13308 states, 13302 states have (on average 1.8298752067358293) internal successors, (24341), 13307 states have internal predecessors, (24341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:44,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13308 states to 13308 states and 24341 transitions. [2021-11-07 01:42:44,231 INFO L78 Accepts]: Start accepts. Automaton has 13308 states and 24341 transitions. Word has length 81 [2021-11-07 01:42:44,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:44,231 INFO L470 AbstractCegarLoop]: Abstraction has 13308 states and 24341 transitions. [2021-11-07 01:42:44,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:44,232 INFO L276 IsEmpty]: Start isEmpty. Operand 13308 states and 24341 transitions. [2021-11-07 01:42:44,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:42:44,245 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:44,245 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:44,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-07 01:42:44,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:44,461 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 01:42:44,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:44,461 INFO L85 PathProgramCache]: Analyzing trace with hash -445984559, now seen corresponding path program 1 times [2021-11-07 01:42:44,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:44,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [464334675] [2021-11-07 01:42:44,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:44,463 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:44,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:44,464 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:44,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:42:45,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:45,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:42:45,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:45,377 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 01:42:45,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:45,605 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 01:42:45,606 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:45,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [464334675] [2021-11-07 01:42:45,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [464334675] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:45,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:45,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:42:45,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82078232] [2021-11-07 01:42:45,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:42:45,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:45,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:42:45,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:42:45,607 INFO L87 Difference]: Start difference. First operand 13308 states and 24341 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:48,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:48,813 INFO L93 Difference]: Finished difference Result 33093 states and 60514 transitions. [2021-11-07 01:42:48,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:42:48,814 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 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 82 [2021-11-07 01:42:48,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:48,880 INFO L225 Difference]: With dead ends: 33093 [2021-11-07 01:42:48,880 INFO L226 Difference]: Without dead ends: 20078 [2021-11-07 01:42:48,902 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 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 01:42:48,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20078 states. [2021-11-07 01:42:49,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20078 to 13275. [2021-11-07 01:42:49,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13275 states, 13269 states have (on average 1.8244781068656266) internal successors, (24209), 13274 states have internal predecessors, (24209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:49,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13275 states to 13275 states and 24209 transitions. [2021-11-07 01:42:49,775 INFO L78 Accepts]: Start accepts. Automaton has 13275 states and 24209 transitions. Word has length 82 [2021-11-07 01:42:49,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:49,775 INFO L470 AbstractCegarLoop]: Abstraction has 13275 states and 24209 transitions. [2021-11-07 01:42:49,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:49,775 INFO L276 IsEmpty]: Start isEmpty. Operand 13275 states and 24209 transitions. [2021-11-07 01:42:49,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 01:42:49,797 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:49,797 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:49,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:50,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:50,013 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 01:42:50,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:50,013 INFO L85 PathProgramCache]: Analyzing trace with hash -52287822, now seen corresponding path program 1 times [2021-11-07 01:42:50,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:50,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988501724] [2021-11-07 01:42:50,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:50,014 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:50,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:50,016 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:50,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:42:50,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:50,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:42:50,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:51,046 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 01:42:51,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:51,269 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 01:42:51,269 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:51,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988501724] [2021-11-07 01:42:51,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988501724] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:51,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:51,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:42:51,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905645734] [2021-11-07 01:42:51,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:42:51,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:51,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:42:51,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:42:51,271 INFO L87 Difference]: Start difference. First operand 13275 states and 24209 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:52,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:52,308 INFO L93 Difference]: Finished difference Result 39032 states and 71254 transitions. [2021-11-07 01:42:52,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:42:52,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 01:42:52,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:52,373 INFO L225 Difference]: With dead ends: 39032 [2021-11-07 01:42:52,373 INFO L226 Difference]: Without dead ends: 25936 [2021-11-07 01:42:52,393 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 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 01:42:52,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25936 states. [2021-11-07 01:42:53,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25936 to 25245. [2021-11-07 01:42:53,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25245 states, 25239 states have (on average 1.8264590514679662) internal successors, (46098), 25244 states have internal predecessors, (46098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:53,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25245 states to 25245 states and 46098 transitions. [2021-11-07 01:42:53,889 INFO L78 Accepts]: Start accepts. Automaton has 25245 states and 46098 transitions. Word has length 82 [2021-11-07 01:42:53,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:53,890 INFO L470 AbstractCegarLoop]: Abstraction has 25245 states and 46098 transitions. [2021-11-07 01:42:53,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:53,890 INFO L276 IsEmpty]: Start isEmpty. Operand 25245 states and 46098 transitions. [2021-11-07 01:42:53,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 01:42:53,908 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:53,908 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:53,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:54,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:54,119 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 01:42:54,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:54,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1977252959, now seen corresponding path program 1 times [2021-11-07 01:42:54,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:54,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065258657] [2021-11-07 01:42:54,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:54,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:54,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:54,123 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:54,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:42:54,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:54,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:42:54,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:55,125 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 01:42:55,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:55,312 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 01:42:55,312 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:55,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065258657] [2021-11-07 01:42:55,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065258657] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:55,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:55,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:42:55,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913464869] [2021-11-07 01:42:55,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:42:55,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:55,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:42:55,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:42:55,315 INFO L87 Difference]: Start difference. First operand 25245 states and 46098 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:57,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:57,130 INFO L93 Difference]: Finished difference Result 69581 states and 126657 transitions. [2021-11-07 01:42:57,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:42:57,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-11-07 01:42:57,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:57,206 INFO L225 Difference]: With dead ends: 69581 [2021-11-07 01:42:57,206 INFO L226 Difference]: Without dead ends: 44562 [2021-11-07 01:42:57,231 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 163 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 01:42:57,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44562 states. [2021-11-07 01:42:59,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44562 to 43871. [2021-11-07 01:42:59,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43871 states, 43865 states have (on average 1.8154565143052548) internal successors, (79635), 43870 states have internal predecessors, (79635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:59,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43871 states to 43871 states and 79635 transitions. [2021-11-07 01:42:59,564 INFO L78 Accepts]: Start accepts. Automaton has 43871 states and 79635 transitions. Word has length 83 [2021-11-07 01:42:59,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:59,564 INFO L470 AbstractCegarLoop]: Abstraction has 43871 states and 79635 transitions. [2021-11-07 01:42:59,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:59,564 INFO L276 IsEmpty]: Start isEmpty. Operand 43871 states and 79635 transitions. [2021-11-07 01:42:59,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:42:59,579 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:59,579 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:59,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:59,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:59,780 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 01:42:59,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:59,780 INFO L85 PathProgramCache]: Analyzing trace with hash -193132085, now seen corresponding path program 1 times [2021-11-07 01:42:59,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:59,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358923397] [2021-11-07 01:42:59,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:59,781 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:59,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:59,782 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:59,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:43:00,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:00,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:43:00,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:00,820 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 01:43:00,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:01,085 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 01:43:01,086 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:01,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358923397] [2021-11-07 01:43:01,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358923397] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:01,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:01,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:43:01,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624683265] [2021-11-07 01:43:01,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:43:01,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:01,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:43:01,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:43:01,088 INFO L87 Difference]: Start difference. First operand 43871 states and 79635 transitions. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:08,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:08,005 INFO L93 Difference]: Finished difference Result 170764 states and 309862 transitions. [2021-11-07 01:43:08,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:43:08,005 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 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 84 [2021-11-07 01:43:08,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:08,482 INFO L225 Difference]: With dead ends: 170764 [2021-11-07 01:43:08,482 INFO L226 Difference]: Without dead ends: 127185 [2021-11-07 01:43:08,534 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 162 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 01:43:08,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127185 states. [2021-11-07 01:43:11,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127185 to 43613. [2021-11-07 01:43:11,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43613 states, 43607 states have (on average 1.8025317036255648) internal successors, (78603), 43612 states have internal predecessors, (78603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:11,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43613 states to 43613 states and 78603 transitions. [2021-11-07 01:43:11,677 INFO L78 Accepts]: Start accepts. Automaton has 43613 states and 78603 transitions. Word has length 84 [2021-11-07 01:43:11,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:11,678 INFO L470 AbstractCegarLoop]: Abstraction has 43613 states and 78603 transitions. [2021-11-07 01:43:11,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:11,678 INFO L276 IsEmpty]: Start isEmpty. Operand 43613 states and 78603 transitions. [2021-11-07 01:43:11,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:43:11,689 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:11,689 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:11,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:11,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:11,890 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 01:43:11,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:11,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1130046957, now seen corresponding path program 1 times [2021-11-07 01:43:11,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:11,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [482160604] [2021-11-07 01:43:11,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:11,891 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:11,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:11,892 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:11,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:43:12,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:12,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:43:12,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:13,009 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 01:43:13,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:13,213 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 01:43:13,213 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:13,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [482160604] [2021-11-07 01:43:13,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [482160604] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:13,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:13,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:43:13,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629123454] [2021-11-07 01:43:13,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:13,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:13,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:13,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:13,216 INFO L87 Difference]: Start difference. First operand 43613 states and 78603 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:15,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:15,191 INFO L93 Difference]: Finished difference Result 87619 states and 157877 transitions. [2021-11-07 01:43:15,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:43:15,191 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 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 84 [2021-11-07 01:43:15,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:15,255 INFO L225 Difference]: With dead ends: 87619 [2021-11-07 01:43:15,255 INFO L226 Difference]: Without dead ends: 44304 [2021-11-07 01:43:15,285 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 164 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 01:43:15,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44304 states. [2021-11-07 01:43:17,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44304 to 43613. [2021-11-07 01:43:17,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43613 states, 43607 states have (on average 1.7995963950741853) internal successors, (78475), 43612 states have internal predecessors, (78475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:17,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43613 states to 43613 states and 78475 transitions. [2021-11-07 01:43:17,563 INFO L78 Accepts]: Start accepts. Automaton has 43613 states and 78475 transitions. Word has length 84 [2021-11-07 01:43:17,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:17,564 INFO L470 AbstractCegarLoop]: Abstraction has 43613 states and 78475 transitions. [2021-11-07 01:43:17,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:17,564 INFO L276 IsEmpty]: Start isEmpty. Operand 43613 states and 78475 transitions. [2021-11-07 01:43:17,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:43:17,578 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:17,578 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:17,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:43:17,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:43:17,779 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 01:43:17,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:17,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1671247200, now seen corresponding path program 1 times [2021-11-07 01:43:17,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:43:17,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1254586065] [2021-11-07 01:43:17,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:17,780 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:43:17,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:43:17,781 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:43:17,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cf58645-147c-4d40-9a0e-66cf87882bea/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:43:18,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:18,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:43:18,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:43:18,822 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 01:43:18,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:43:19,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:19,019 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:43:19,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1254586065] [2021-11-07 01:43:19,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1254586065] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:19,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:19,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:43:19,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336528560] [2021-11-07 01:43:19,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:43:19,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:43:19,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:43:19,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:43:19,021 INFO L87 Difference]: Start difference. First operand 43613 states and 78475 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:22,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:22,390 INFO L93 Difference]: Finished difference Result 122349 states and 219903 transitions. [2021-11-07 01:43:22,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:43:22,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-11-07 01:43:22,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:22,526 INFO L225 Difference]: With dead ends: 122349 [2021-11-07 01:43:22,527 INFO L226 Difference]: Without dead ends: 78994 [2021-11-07 01:43:22,555 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 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 01:43:22,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78994 states.