./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec27_product27.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_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/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_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec27_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/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_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/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 7f7652bf269245a8144605490a4a891295a82bf8357d2cf3971e290586b4e5c1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:04:33,397 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:04:33,399 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:04:33,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:04:33,434 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:04:33,438 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:04:33,441 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:04:33,445 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:04:33,447 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:04:33,452 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:04:33,453 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:04:33,455 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:04:33,456 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:04:33,458 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:04:33,460 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:04:33,462 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:04:33,463 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:04:33,464 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:04:33,469 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:04:33,476 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:04:33,478 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:04:33,479 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:04:33,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:04:33,483 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:04:33,491 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:04:33,492 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:04:33,492 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:04:33,494 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:04:33,495 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:04:33,496 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:04:33,496 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:04:33,497 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:04:33,499 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:04:33,500 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:04:33,501 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:04:33,501 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:04:33,502 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:04:33,502 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:04:33,503 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:04:33,503 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:04:33,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:04:33,505 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:04:33,552 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:04:33,552 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:04:33,554 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:04:33,554 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:04:33,554 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:04:33,554 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:04:33,554 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:04:33,554 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:04:33,555 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:04:33,555 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:04:33,556 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:04:33,556 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:04:33,556 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:04:33,556 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:04:33,557 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:04:33,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:04:33,558 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:04:33,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:04:33,558 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:04:33,558 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:04:33,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:04:33,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:04:33,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:04:33,559 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:04:33,559 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:04:33,560 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:04:33,560 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:04:33,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:04:33,560 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:04:33,562 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:04:33,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:04:33,562 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:04:33,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:04:33,563 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:04:33,563 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:04:33,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:04:33,563 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:04:33,563 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:04:33,563 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:04:33,564 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_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f7652bf269245a8144605490a4a891295a82bf8357d2cf3971e290586b4e5c1 [2021-11-07 02:04:33,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:04:33,884 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:04:33,887 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:04:33,888 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:04:33,889 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:04:33,890 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec27_product27.cil.c [2021-11-07 02:04:33,955 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/data/311a199c0/5dce5c86d80946ea920ede0c424ec808/FLAG469f751a9 [2021-11-07 02:04:34,574 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:04:34,574 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/sv-benchmarks/c/product-lines/email_spec27_product27.cil.c [2021-11-07 02:04:34,607 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/data/311a199c0/5dce5c86d80946ea920ede0c424ec808/FLAG469f751a9 [2021-11-07 02:04:34,832 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/data/311a199c0/5dce5c86d80946ea920ede0c424ec808 [2021-11-07 02:04:34,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:04:34,836 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:04:34,851 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:04:34,851 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:04:34,854 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:04:34,855 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:04:34" (1/1) ... [2021-11-07 02:04:34,856 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4baf6c12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:34, skipping insertion in model container [2021-11-07 02:04:34,856 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:04:34" (1/1) ... [2021-11-07 02:04:34,865 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:04:34,943 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:04:35,518 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_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/sv-benchmarks/c/product-lines/email_spec27_product27.cil.c[57688,57701] [2021-11-07 02:04:35,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:04:35,595 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 02:04:35,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@f9efcec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:35, skipping insertion in model container [2021-11-07 02:04:35,604 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:04:35,605 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:04:35,607 INFO L168 Benchmark]: Toolchain (without parser) took 770.03 ms. Allocated memory is still 104.9 MB. Free memory was 60.8 MB in the beginning and 65.0 MB in the end (delta: -4.3 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. [2021-11-07 02:04:35,609 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 104.9 MB. Free memory is still 80.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:04:35,611 INFO L168 Benchmark]: CACSL2BoogieTranslator took 754.34 ms. Allocated memory is still 104.9 MB. Free memory was 60.5 MB in the beginning and 65.0 MB in the end (delta: -4.5 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. [2021-11-07 02:04:35,613 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 104.9 MB. Free memory is still 80.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 754.34 ms. Allocated memory is still 104.9 MB. Free memory was 60.5 MB in the beginning and 65.0 MB in the end (delta: -4.5 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 196]: 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_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/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_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec27_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/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_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/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 7f7652bf269245a8144605490a4a891295a82bf8357d2cf3971e290586b4e5c1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:04:37,730 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:04:37,732 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:04:37,789 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:04:37,790 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:04:37,794 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:04:37,795 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:04:37,799 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:04:37,803 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:04:37,810 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:04:37,811 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:04:37,813 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:04:37,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:04:37,815 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:04:37,818 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:04:37,821 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:04:37,823 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:04:37,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:04:37,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:04:37,838 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:04:37,840 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:04:37,842 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:04:37,844 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:04:37,846 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:04:37,855 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:04:37,855 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:04:37,856 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:04:37,858 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:04:37,858 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:04:37,859 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:04:37,859 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:04:37,860 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:04:37,862 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:04:37,863 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:04:37,864 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:04:37,864 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:04:37,865 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:04:37,865 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:04:37,866 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:04:37,867 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:04:37,868 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:04:37,869 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:04:37,913 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:04:37,914 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:04:37,915 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:04:37,915 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:04:37,915 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:04:37,916 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:04:37,916 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:04:37,916 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:04:37,917 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:04:37,918 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:04:37,919 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:04:37,919 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:04:37,920 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:04:37,920 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:04:37,920 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:04:37,920 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:04:37,920 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:04:37,920 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:04:37,921 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:04:37,921 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:04:37,921 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:04:37,921 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:04:37,921 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:04:37,922 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:04:37,922 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:04:37,922 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:04:37,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:04:37,922 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:04:37,922 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:04:37,923 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:04:37,923 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:04:37,923 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:04:37,923 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:04:37,923 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:04:37,924 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:04:37,924 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_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f7652bf269245a8144605490a4a891295a82bf8357d2cf3971e290586b4e5c1 [2021-11-07 02:04:38,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:04:38,312 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:04:38,316 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:04:38,318 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:04:38,318 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:04:38,319 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec27_product27.cil.c [2021-11-07 02:04:38,397 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/data/e5f5f58ac/b0d6b234aee2435fb71dae8bc53cc809/FLAGa9541732f [2021-11-07 02:04:39,103 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:04:39,103 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/sv-benchmarks/c/product-lines/email_spec27_product27.cil.c [2021-11-07 02:04:39,131 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/data/e5f5f58ac/b0d6b234aee2435fb71dae8bc53cc809/FLAGa9541732f [2021-11-07 02:04:39,277 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/data/e5f5f58ac/b0d6b234aee2435fb71dae8bc53cc809 [2021-11-07 02:04:39,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:04:39,281 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:04:39,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:04:39,291 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:04:39,294 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:04:39,296 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:04:39" (1/1) ... [2021-11-07 02:04:39,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6aa09175 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:39, skipping insertion in model container [2021-11-07 02:04:39,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:04:39" (1/1) ... [2021-11-07 02:04:39,307 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:04:39,386 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:04:40,048 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_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/sv-benchmarks/c/product-lines/email_spec27_product27.cil.c[57688,57701] [2021-11-07 02:04:40,102 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:04:40,126 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:04:40,145 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:04:40,277 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_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/sv-benchmarks/c/product-lines/email_spec27_product27.cil.c[57688,57701] [2021-11-07 02:04:40,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:04:40,305 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:04:40,390 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_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/sv-benchmarks/c/product-lines/email_spec27_product27.cil.c[57688,57701] [2021-11-07 02:04:40,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:04:40,435 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:04:40,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:40 WrapperNode [2021-11-07 02:04:40,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:04:40,436 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:04:40,436 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:04:40,437 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:04:40,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:40" (1/1) ... [2021-11-07 02:04:40,478 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:40" (1/1) ... [2021-11-07 02:04:40,664 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:04:40,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:04:40,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:04:40,665 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:04:40,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:40" (1/1) ... [2021-11-07 02:04:40,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:40" (1/1) ... [2021-11-07 02:04:40,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:40" (1/1) ... [2021-11-07 02:04:40,709 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:40" (1/1) ... [2021-11-07 02:04:40,774 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:40" (1/1) ... [2021-11-07 02:04:40,821 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:40" (1/1) ... [2021-11-07 02:04:40,830 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:40" (1/1) ... [2021-11-07 02:04:40,869 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:04:40,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:04:40,873 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:04:40,874 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:04:40,875 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:40" (1/1) ... [2021-11-07 02:04:40,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:04:40,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:04:40,908 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:04:40,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:04:40,957 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 02:04:40,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:04:40,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:04:40,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:04:40,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:04:46,483 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:04:46,484 INFO L299 CfgBuilder]: Removed 709 assume(true) statements. [2021-11-07 02:04:46,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:04:46 BoogieIcfgContainer [2021-11-07 02:04:46,488 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:04:46,490 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:04:46,490 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:04:46,493 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:04:46,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:04:39" (1/3) ... [2021-11-07 02:04:46,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cf6d6ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:04:46, skipping insertion in model container [2021-11-07 02:04:46,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:04:40" (2/3) ... [2021-11-07 02:04:46,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cf6d6ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:04:46, skipping insertion in model container [2021-11-07 02:04:46,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:04:46" (3/3) ... [2021-11-07 02:04:46,497 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec27_product27.cil.c [2021-11-07 02:04:46,502 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:04:46,502 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 02:04:46,554 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:04:46,561 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 02:04:46,561 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 02:04:46,619 INFO L276 IsEmpty]: Start isEmpty. Operand has 1042 states, 1035 states have (on average 1.736231884057971) internal successors, (1797), 1041 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:46,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 02:04:46,643 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:46,644 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:46,644 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 02:04:46,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:46,650 INFO L85 PathProgramCache]: Analyzing trace with hash 735378655, now seen corresponding path program 1 times [2021-11-07 02:04:46,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:46,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [233873353] [2021-11-07 02:04:46,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:46,665 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:46,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:46,668 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:46,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:04:47,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:47,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:04:47,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:47,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:47,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:47,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:47,429 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:47,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [233873353] [2021-11-07 02:04:47,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [233873353] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:47,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:47,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:04:47,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974962126] [2021-11-07 02:04:47,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:04:47,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:47,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:04:47,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:04:47,454 INFO L87 Difference]: Start difference. First operand has 1042 states, 1035 states have (on average 1.736231884057971) internal successors, (1797), 1041 states have internal predecessors, (1797), 0 states have call successors, (0), 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 25.5) internal successors, (51), 2 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:47,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:47,539 INFO L93 Difference]: Finished difference Result 1795 states and 3064 transitions. [2021-11-07 02:04:47,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:04:47,544 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 25.5) internal successors, (51), 2 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 02:04:47,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:47,575 INFO L225 Difference]: With dead ends: 1795 [2021-11-07 02:04:47,575 INFO L226 Difference]: Without dead ends: 950 [2021-11-07 02:04:47,584 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:04:47,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2021-11-07 02:04:47,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 950. [2021-11-07 02:04:47,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 944 states have (on average 1.7372881355932204) internal successors, (1640), 949 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:47,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1640 transitions. [2021-11-07 02:04:47,711 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1640 transitions. Word has length 51 [2021-11-07 02:04:47,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:47,711 INFO L470 AbstractCegarLoop]: Abstraction has 950 states and 1640 transitions. [2021-11-07 02:04:47,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 25.5) internal successors, (51), 2 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:47,712 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1640 transitions. [2021-11-07 02:04:47,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 02:04:47,717 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:47,717 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:47,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:47,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:47,932 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 02:04:47,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:47,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1590499988, now seen corresponding path program 1 times [2021-11-07 02:04:47,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:47,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1583714264] [2021-11-07 02:04:47,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:47,935 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:47,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:47,936 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:47,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:04:48,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:48,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:04:48,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:48,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:48,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:48,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:48,661 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:48,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1583714264] [2021-11-07 02:04:48,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1583714264] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:48,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:48,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:04:48,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519437733] [2021-11-07 02:04:48,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:04:48,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:48,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:04:48,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:04:48,666 INFO L87 Difference]: Start difference. First operand 950 states and 1640 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:48,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:48,860 INFO L93 Difference]: Finished difference Result 2820 states and 4872 transitions. [2021-11-07 02:04:48,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:04:48,860 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 02:04:48,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:48,875 INFO L225 Difference]: With dead ends: 2820 [2021-11-07 02:04:48,875 INFO L226 Difference]: Without dead ends: 1885 [2021-11-07 02:04:48,878 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:04:48,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1885 states. [2021-11-07 02:04:48,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1885 to 949. [2021-11-07 02:04:48,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 943 states have (on average 1.733828207847296) internal successors, (1635), 948 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:48,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1635 transitions. [2021-11-07 02:04:48,935 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1635 transitions. Word has length 52 [2021-11-07 02:04:48,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:48,936 INFO L470 AbstractCegarLoop]: Abstraction has 949 states and 1635 transitions. [2021-11-07 02:04:48,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:48,936 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1635 transitions. [2021-11-07 02:04:48,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 02:04:48,941 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:48,941 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] [2021-11-07 02:04:48,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:49,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:49,159 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 02:04:49,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:49,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1665791342, now seen corresponding path program 1 times [2021-11-07 02:04:49,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:49,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1660966902] [2021-11-07 02:04:49,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:49,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:49,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:49,163 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:49,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:04:49,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:49,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:04:49,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:49,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:49,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:49,942 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:49,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1660966902] [2021-11-07 02:04:49,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1660966902] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:49,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:49,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:04:49,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896455451] [2021-11-07 02:04:49,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:04:49,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:49,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:04:49,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:04:49,946 INFO L87 Difference]: Start difference. First operand 949 states and 1635 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:50,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:50,280 INFO L93 Difference]: Finished difference Result 3713 states and 6402 transitions. [2021-11-07 02:04:50,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:04:50,281 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 02:04:50,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:50,298 INFO L225 Difference]: With dead ends: 3713 [2021-11-07 02:04:50,299 INFO L226 Difference]: Without dead ends: 2782 [2021-11-07 02:04:50,301 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:04:50,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2782 states. [2021-11-07 02:04:50,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2782 to 948. [2021-11-07 02:04:50,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 942 states have (on average 1.7314225053078556) internal successors, (1631), 947 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:50,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1631 transitions. [2021-11-07 02:04:50,375 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1631 transitions. Word has length 54 [2021-11-07 02:04:50,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:50,388 INFO L470 AbstractCegarLoop]: Abstraction has 948 states and 1631 transitions. [2021-11-07 02:04:50,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:50,390 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1631 transitions. [2021-11-07 02:04:50,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 02:04:50,394 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:50,394 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:50,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:50,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:50,609 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 02:04:50,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:50,610 INFO L85 PathProgramCache]: Analyzing trace with hash 2124428539, now seen corresponding path program 1 times [2021-11-07 02:04:50,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:50,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1239564177] [2021-11-07 02:04:50,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:50,612 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:50,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:50,616 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:50,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:04:51,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:51,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:04:51,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:51,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:51,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:51,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:51,457 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:51,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1239564177] [2021-11-07 02:04:51,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1239564177] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:51,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:51,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:04:51,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030745547] [2021-11-07 02:04:51,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:04:51,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:51,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:04:51,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:04:51,462 INFO L87 Difference]: Start difference. First operand 948 states and 1631 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:51,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:51,565 INFO L93 Difference]: Finished difference Result 1893 states and 3259 transitions. [2021-11-07 02:04:51,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:04:51,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 02:04:51,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:51,572 INFO L225 Difference]: With dead ends: 1893 [2021-11-07 02:04:51,572 INFO L226 Difference]: Without dead ends: 953 [2021-11-07 02:04:51,574 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:04:51,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-11-07 02:04:51,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 948. [2021-11-07 02:04:51,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 942 states have (on average 1.7282377919320595) internal successors, (1628), 947 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:51,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1628 transitions. [2021-11-07 02:04:51,653 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1628 transitions. Word has length 55 [2021-11-07 02:04:51,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:51,655 INFO L470 AbstractCegarLoop]: Abstraction has 948 states and 1628 transitions. [2021-11-07 02:04:51,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:51,655 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1628 transitions. [2021-11-07 02:04:51,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 02:04:51,657 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:51,658 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] [2021-11-07 02:04:51,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:51,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:51,873 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 02:04:51,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:51,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1264340602, now seen corresponding path program 1 times [2021-11-07 02:04:51,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:51,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1553342581] [2021-11-07 02:04:51,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:51,875 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:51,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:51,876 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:51,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:04:52,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:52,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:04:52,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:52,481 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 02:04:52,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:52,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:52,636 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:52,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1553342581] [2021-11-07 02:04:52,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1553342581] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:52,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:52,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:04:52,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826189609] [2021-11-07 02:04:52,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:04:52,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:52,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:04:52,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:04:52,645 INFO L87 Difference]: Start difference. First operand 948 states and 1628 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:53,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:53,013 INFO L93 Difference]: Finished difference Result 3700 states and 6378 transitions. [2021-11-07 02:04:53,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:04:53,014 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-07 02:04:53,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:53,031 INFO L225 Difference]: With dead ends: 3700 [2021-11-07 02:04:53,031 INFO L226 Difference]: Without dead ends: 2778 [2021-11-07 02:04:53,035 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:04:53,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2778 states. [2021-11-07 02:04:53,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2778 to 948. [2021-11-07 02:04:53,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 942 states have (on average 1.7250530785562632) internal successors, (1625), 947 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:53,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1625 transitions. [2021-11-07 02:04:53,128 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1625 transitions. Word has length 56 [2021-11-07 02:04:53,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:53,129 INFO L470 AbstractCegarLoop]: Abstraction has 948 states and 1625 transitions. [2021-11-07 02:04:53,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:53,129 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1625 transitions. [2021-11-07 02:04:53,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 02:04:53,131 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:53,131 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 02:04:53,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:53,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:53,347 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 02:04:53,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:53,348 INFO L85 PathProgramCache]: Analyzing trace with hash 2050013867, now seen corresponding path program 1 times [2021-11-07 02:04:53,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:53,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1386634704] [2021-11-07 02:04:53,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:53,349 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:53,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:53,350 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:53,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:04:53,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:53,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:04:53,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:53,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:53,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:54,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:54,048 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:54,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1386634704] [2021-11-07 02:04:54,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1386634704] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:54,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:54,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:04:54,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089917836] [2021-11-07 02:04:54,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:04:54,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:54,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:04:54,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:04:54,051 INFO L87 Difference]: Start difference. First operand 948 states and 1625 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:54,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:54,205 INFO L93 Difference]: Finished difference Result 2531 states and 4333 transitions. [2021-11-07 02:04:54,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:04:54,206 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 02:04:54,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:54,217 INFO L225 Difference]: With dead ends: 2531 [2021-11-07 02:04:54,217 INFO L226 Difference]: Without dead ends: 1870 [2021-11-07 02:04:54,219 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 02:04:54,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2021-11-07 02:04:54,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1209. [2021-11-07 02:04:54,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 1203 states have (on average 1.7497921862011638) internal successors, (2105), 1208 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:54,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 2105 transitions. [2021-11-07 02:04:54,314 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 2105 transitions. Word has length 58 [2021-11-07 02:04:54,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:54,315 INFO L470 AbstractCegarLoop]: Abstraction has 1209 states and 2105 transitions. [2021-11-07 02:04:54,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:54,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 2105 transitions. [2021-11-07 02:04:54,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 02:04:54,317 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:54,317 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:54,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-07 02:04:54,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:54,531 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 02:04:54,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:54,532 INFO L85 PathProgramCache]: Analyzing trace with hash 919548634, now seen corresponding path program 1 times [2021-11-07 02:04:54,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:54,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521584096] [2021-11-07 02:04:54,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:54,533 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:54,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:54,534 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:54,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:04:54,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:54,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:04:54,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:55,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:55,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:55,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:55,256 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:55,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521584096] [2021-11-07 02:04:55,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521584096] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:55,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:55,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:04:55,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366816723] [2021-11-07 02:04:55,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:04:55,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:55,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:04:55,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:04:55,258 INFO L87 Difference]: Start difference. First operand 1209 states and 2105 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:55,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:55,427 INFO L93 Difference]: Finished difference Result 3204 states and 5574 transitions. [2021-11-07 02:04:55,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:04:55,427 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 02:04:55,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:55,440 INFO L225 Difference]: With dead ends: 3204 [2021-11-07 02:04:55,441 INFO L226 Difference]: Without dead ends: 2079 [2021-11-07 02:04:55,444 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:04:55,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2079 states. [2021-11-07 02:04:55,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2079 to 1418. [2021-11-07 02:04:55,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1418 states, 1412 states have (on average 1.7620396600566572) internal successors, (2488), 1417 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:55,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 2488 transitions. [2021-11-07 02:04:55,569 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 2488 transitions. Word has length 70 [2021-11-07 02:04:55,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:55,571 INFO L470 AbstractCegarLoop]: Abstraction has 1418 states and 2488 transitions. [2021-11-07 02:04:55,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:55,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 2488 transitions. [2021-11-07 02:04:55,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 02:04:55,574 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:55,574 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:55,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:55,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:55,788 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 02:04:55,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:55,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1632842213, now seen corresponding path program 1 times [2021-11-07 02:04:55,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:55,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1442863368] [2021-11-07 02:04:55,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:55,790 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:55,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:55,791 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:55,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:04:56,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:56,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:04:56,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:56,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:56,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:56,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:56,578 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:56,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1442863368] [2021-11-07 02:04:56,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1442863368] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:56,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:56,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:04:56,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529890472] [2021-11-07 02:04:56,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:04:56,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:56,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:04:56,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:04:56,581 INFO L87 Difference]: Start difference. First operand 1418 states and 2488 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:56,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:56,794 INFO L93 Difference]: Finished difference Result 3863 states and 6788 transitions. [2021-11-07 02:04:56,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:04:56,795 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 02:04:56,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:56,810 INFO L225 Difference]: With dead ends: 3863 [2021-11-07 02:04:56,810 INFO L226 Difference]: Without dead ends: 2537 [2021-11-07 02:04:56,814 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:04:56,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2021-11-07 02:04:56,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 1876. [2021-11-07 02:04:56,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1870 states have (on average 1.7807486631016043) internal successors, (3330), 1875 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:56,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 3330 transitions. [2021-11-07 02:04:56,947 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 3330 transitions. Word has length 71 [2021-11-07 02:04:56,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:56,947 INFO L470 AbstractCegarLoop]: Abstraction has 1876 states and 3330 transitions. [2021-11-07 02:04:56,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:56,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 3330 transitions. [2021-11-07 02:04:56,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 02:04:56,951 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:56,951 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:56,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:57,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:57,171 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 02:04:57,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:57,172 INFO L85 PathProgramCache]: Analyzing trace with hash 908269292, now seen corresponding path program 1 times [2021-11-07 02:04:57,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:57,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1856329644] [2021-11-07 02:04:57,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:57,173 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:57,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:57,174 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:57,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:04:57,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:57,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:04:57,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:57,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:57,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:58,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:58,083 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:58,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1856329644] [2021-11-07 02:04:58,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1856329644] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:58,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:58,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:04:58,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386436133] [2021-11-07 02:04:58,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:04:58,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:58,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:04:58,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:04:58,089 INFO L87 Difference]: Start difference. First operand 1876 states and 3330 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:58,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:58,296 INFO L93 Difference]: Finished difference Result 5217 states and 9283 transitions. [2021-11-07 02:04:58,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:04:58,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 02:04:58,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:58,318 INFO L225 Difference]: With dead ends: 5217 [2021-11-07 02:04:58,318 INFO L226 Difference]: Without dead ends: 3441 [2021-11-07 02:04:58,322 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:04:58,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3441 states. [2021-11-07 02:04:58,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3441 to 2780. [2021-11-07 02:04:58,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2780 states, 2774 states have (on average 1.7999279019466474) internal successors, (4993), 2779 states have internal predecessors, (4993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:58,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2780 states to 2780 states and 4993 transitions. [2021-11-07 02:04:58,516 INFO L78 Accepts]: Start accepts. Automaton has 2780 states and 4993 transitions. Word has length 72 [2021-11-07 02:04:58,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:04:58,517 INFO L470 AbstractCegarLoop]: Abstraction has 2780 states and 4993 transitions. [2021-11-07 02:04:58,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:58,517 INFO L276 IsEmpty]: Start isEmpty. Operand 2780 states and 4993 transitions. [2021-11-07 02:04:58,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 02:04:58,522 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:04:58,522 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:04:58,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:04:58,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:04:58,737 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 02:04:58,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:04:58,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1228966252, now seen corresponding path program 1 times [2021-11-07 02:04:58,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:04:58,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1705576742] [2021-11-07 02:04:58,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:04:58,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:04:58,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:04:58,740 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:04:58,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:04:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:04:59,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:04:59,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:04:59,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:59,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:04:59,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:04:59,530 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:04:59,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1705576742] [2021-11-07 02:04:59,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1705576742] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:04:59,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:04:59,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:04:59,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138004530] [2021-11-07 02:04:59,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:04:59,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:04:59,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:04:59,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:04:59,532 INFO L87 Difference]: Start difference. First operand 2780 states and 4993 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:59,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:59,820 INFO L93 Difference]: Finished difference Result 7665 states and 13791 transitions. [2021-11-07 02:04:59,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:04:59,821 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 02:04:59,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:59,866 INFO L225 Difference]: With dead ends: 7665 [2021-11-07 02:04:59,866 INFO L226 Difference]: Without dead ends: 5019 [2021-11-07 02:04:59,871 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:04:59,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5019 states. [2021-11-07 02:05:00,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5019 to 4358. [2021-11-07 02:05:00,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4358 states, 4352 states have (on average 1.8138786764705883) internal successors, (7894), 4357 states have internal predecessors, (7894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:00,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4358 states to 4358 states and 7894 transitions. [2021-11-07 02:05:00,208 INFO L78 Accepts]: Start accepts. Automaton has 4358 states and 7894 transitions. Word has length 73 [2021-11-07 02:05:00,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:00,208 INFO L470 AbstractCegarLoop]: Abstraction has 4358 states and 7894 transitions. [2021-11-07 02:05:00,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:00,209 INFO L276 IsEmpty]: Start isEmpty. Operand 4358 states and 7894 transitions. [2021-11-07 02:05:00,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 02:05:00,217 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:00,217 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:00,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:00,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:00,431 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 02:05:00,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:00,432 INFO L85 PathProgramCache]: Analyzing trace with hash 881154971, now seen corresponding path program 1 times [2021-11-07 02:05:00,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:00,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1165506438] [2021-11-07 02:05:00,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:00,433 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:00,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:00,434 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:00,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:05:01,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:01,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:05:01,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:01,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:01,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:01,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:01,340 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:01,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1165506438] [2021-11-07 02:05:01,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1165506438] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:01,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:01,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:05:01,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375992242] [2021-11-07 02:05:01,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:05:01,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:01,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:05:01,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:05:01,343 INFO L87 Difference]: Start difference. First operand 4358 states and 7894 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:01,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:01,749 INFO L93 Difference]: Finished difference Result 12115 states and 21977 transitions. [2021-11-07 02:05:01,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:05:01,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 02:05:01,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:01,771 INFO L225 Difference]: With dead ends: 12115 [2021-11-07 02:05:01,772 INFO L226 Difference]: Without dead ends: 7925 [2021-11-07 02:05:01,778 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:05:01,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7925 states. [2021-11-07 02:05:02,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7925 to 7264. [2021-11-07 02:05:02,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7264 states, 7258 states have (on average 1.8229539818131717) internal successors, (13231), 7263 states have internal predecessors, (13231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:02,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7264 states to 7264 states and 13231 transitions. [2021-11-07 02:05:02,149 INFO L78 Accepts]: Start accepts. Automaton has 7264 states and 13231 transitions. Word has length 74 [2021-11-07 02:05:02,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:02,150 INFO L470 AbstractCegarLoop]: Abstraction has 7264 states and 13231 transitions. [2021-11-07 02:05:02,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:02,150 INFO L276 IsEmpty]: Start isEmpty. Operand 7264 states and 13231 transitions. [2021-11-07 02:05:02,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 02:05:02,157 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:02,158 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:02,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:02,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:02,371 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 02:05:02,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:02,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1000131781, now seen corresponding path program 1 times [2021-11-07 02:05:02,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:02,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1980932248] [2021-11-07 02:05:02,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:02,373 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:02,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:02,374 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:02,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:05:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:02,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:05:02,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:03,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:03,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:03,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:03,306 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:03,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1980932248] [2021-11-07 02:05:03,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1980932248] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:03,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:03,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:05:03,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698999009] [2021-11-07 02:05:03,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:05:03,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:03,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:05:03,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:05:03,308 INFO L87 Difference]: Start difference. First operand 7264 states and 13231 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:03,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:03,720 INFO L93 Difference]: Finished difference Result 21159 states and 38599 transitions. [2021-11-07 02:05:03,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:05:03,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 02:05:03,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:03,758 INFO L225 Difference]: With dead ends: 21159 [2021-11-07 02:05:03,758 INFO L226 Difference]: Without dead ends: 14071 [2021-11-07 02:05:03,769 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:05:03,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14071 states. [2021-11-07 02:05:04,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14071 to 13410. [2021-11-07 02:05:04,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13410 states, 13404 states have (on average 1.8287078484034616) internal successors, (24512), 13409 states have internal predecessors, (24512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:04,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13410 states to 13410 states and 24512 transitions. [2021-11-07 02:05:04,621 INFO L78 Accepts]: Start accepts. Automaton has 13410 states and 24512 transitions. Word has length 75 [2021-11-07 02:05:04,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:04,621 INFO L470 AbstractCegarLoop]: Abstraction has 13410 states and 24512 transitions. [2021-11-07 02:05:04,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:04,622 INFO L276 IsEmpty]: Start isEmpty. Operand 13410 states and 24512 transitions. [2021-11-07 02:05:04,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 02:05:04,634 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:04,634 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] [2021-11-07 02:05:04,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-07 02:05:04,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:04,847 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 02:05:04,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:04,848 INFO L85 PathProgramCache]: Analyzing trace with hash -925474805, now seen corresponding path program 1 times [2021-11-07 02:05:04,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:04,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1209111230] [2021-11-07 02:05:04,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:04,848 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:04,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:04,849 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:04,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:05:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:05,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:05:05,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:05,691 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:05:05,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:05,902 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:05:05,902 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:05,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1209111230] [2021-11-07 02:05:05,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1209111230] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:05,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:05,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:05:05,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392815289] [2021-11-07 02:05:05,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:05:05,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:05,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:05:05,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:05:05,904 INFO L87 Difference]: Start difference. First operand 13410 states and 24512 transitions. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:09,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:09,279 INFO L93 Difference]: Finished difference Result 33327 states and 60901 transitions. [2021-11-07 02:05:09,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:05:09,280 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 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 02:05:09,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:09,322 INFO L225 Difference]: With dead ends: 33327 [2021-11-07 02:05:09,322 INFO L226 Difference]: Without dead ends: 20214 [2021-11-07 02:05:09,337 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:05:09,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20214 states. [2021-11-07 02:05:09,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20214 to 13377. [2021-11-07 02:05:09,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13377 states, 13371 states have (on average 1.823349038964924) internal successors, (24380), 13376 states have internal predecessors, (24380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:10,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13377 states to 13377 states and 24380 transitions. [2021-11-07 02:05:10,024 INFO L78 Accepts]: Start accepts. Automaton has 13377 states and 24380 transitions. Word has length 76 [2021-11-07 02:05:10,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:10,024 INFO L470 AbstractCegarLoop]: Abstraction has 13377 states and 24380 transitions. [2021-11-07 02:05:10,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:10,025 INFO L276 IsEmpty]: Start isEmpty. Operand 13377 states and 24380 transitions. [2021-11-07 02:05:10,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 02:05:10,035 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:10,035 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 02:05:10,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 02:05:10,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:10,250 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 02:05:10,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:10,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1674300980, now seen corresponding path program 1 times [2021-11-07 02:05:10,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:10,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [929728495] [2021-11-07 02:05:10,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:10,251 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:10,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:10,252 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:10,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:05:11,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:11,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:05:11,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:11,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:11,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:11,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:11,410 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:11,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [929728495] [2021-11-07 02:05:11,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [929728495] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:11,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:11,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:05:11,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314716586] [2021-11-07 02:05:11,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:05:11,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:11,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:05:11,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:05:11,412 INFO L87 Difference]: Start difference. First operand 13377 states and 24380 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 02:05:12,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:12,480 INFO L93 Difference]: Finished difference Result 39330 states and 71753 transitions. [2021-11-07 02:05:12,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:05:12,480 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 02:05:12,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:12,531 INFO L225 Difference]: With dead ends: 39330 [2021-11-07 02:05:12,531 INFO L226 Difference]: Without dead ends: 26136 [2021-11-07 02:05:12,548 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 02:05:12,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26136 states. [2021-11-07 02:05:13,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26136 to 25475. [2021-11-07 02:05:13,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25475 states, 25469 states have (on average 1.8254741057756487) internal successors, (46493), 25474 states have internal predecessors, (46493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:13,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25475 states to 25475 states and 46493 transitions. [2021-11-07 02:05:13,919 INFO L78 Accepts]: Start accepts. Automaton has 25475 states and 46493 transitions. Word has length 76 [2021-11-07 02:05:13,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:13,920 INFO L470 AbstractCegarLoop]: Abstraction has 25475 states and 46493 transitions. [2021-11-07 02:05:13,920 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 02:05:13,920 INFO L276 IsEmpty]: Start isEmpty. Operand 25475 states and 46493 transitions. [2021-11-07 02:05:13,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 02:05:13,931 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:13,931 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 02:05:13,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-07 02:05:14,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:14,147 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 02:05:14,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:14,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1609033484, now seen corresponding path program 1 times [2021-11-07 02:05:14,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:14,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1850247617] [2021-11-07 02:05:14,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:14,148 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:14,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:14,149 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:14,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:05:14,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:14,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:05:14,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:14,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:14,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:15,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:15,112 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:15,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1850247617] [2021-11-07 02:05:15,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1850247617] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:15,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:15,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:05:15,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967901372] [2021-11-07 02:05:15,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:05:15,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:15,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:05:15,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:05:15,115 INFO L87 Difference]: Start difference. First operand 25475 states and 46493 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 02:05:16,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:16,965 INFO L93 Difference]: Finished difference Result 70263 states and 127828 transitions. [2021-11-07 02:05:16,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:05:16,966 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 02:05:16,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:17,031 INFO L225 Difference]: With dead ends: 70263 [2021-11-07 02:05:17,032 INFO L226 Difference]: Without dead ends: 45018 [2021-11-07 02:05:17,055 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 02:05:17,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45018 states. [2021-11-07 02:05:19,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45018 to 44357. [2021-11-07 02:05:19,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44357 states, 44351 states have (on average 1.814570133706117) internal successors, (80478), 44356 states have internal predecessors, (80478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:19,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44357 states to 44357 states and 80478 transitions. [2021-11-07 02:05:19,485 INFO L78 Accepts]: Start accepts. Automaton has 44357 states and 80478 transitions. Word has length 77 [2021-11-07 02:05:19,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:19,485 INFO L470 AbstractCegarLoop]: Abstraction has 44357 states and 80478 transitions. [2021-11-07 02:05:19,486 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 02:05:19,486 INFO L276 IsEmpty]: Start isEmpty. Operand 44357 states and 80478 transitions. [2021-11-07 02:05:19,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 02:05:19,500 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:19,500 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] [2021-11-07 02:05:19,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 02:05:19,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:19,715 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 02:05:19,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:19,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1012751493, now seen corresponding path program 1 times [2021-11-07 02:05:19,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:19,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [334397080] [2021-11-07 02:05:19,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:19,717 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:19,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:19,718 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:19,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:05:20,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:20,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:05:20,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:20,704 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:05:20,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:20,970 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:05:20,970 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:20,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [334397080] [2021-11-07 02:05:20,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [334397080] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:20,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:20,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:05:20,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726698370] [2021-11-07 02:05:20,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:05:20,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:20,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:05:20,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:05:20,973 INFO L87 Difference]: Start difference. First operand 44357 states and 80478 transitions. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:28,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:28,170 INFO L93 Difference]: Finished difference Result 172696 states and 313213 transitions. [2021-11-07 02:05:28,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:05:28,171 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 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 02:05:28,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:28,593 INFO L225 Difference]: With dead ends: 172696 [2021-11-07 02:05:28,593 INFO L226 Difference]: Without dead ends: 128635 [2021-11-07 02:05:28,675 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:05:28,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128635 states. [2021-11-07 02:05:32,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128635 to 44099. [2021-11-07 02:05:32,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44099 states, 44093 states have (on average 1.8017825958768965) internal successors, (79446), 44098 states have internal predecessors, (79446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:32,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44099 states to 44099 states and 79446 transitions. [2021-11-07 02:05:32,512 INFO L78 Accepts]: Start accepts. Automaton has 44099 states and 79446 transitions. Word has length 78 [2021-11-07 02:05:32,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:32,512 INFO L470 AbstractCegarLoop]: Abstraction has 44099 states and 79446 transitions. [2021-11-07 02:05:32,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:32,513 INFO L276 IsEmpty]: Start isEmpty. Operand 44099 states and 79446 transitions. [2021-11-07 02:05:32,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 02:05:32,520 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:32,520 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] [2021-11-07 02:05:32,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:32,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:32,721 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 02:05:32,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:32,721 INFO L85 PathProgramCache]: Analyzing trace with hash 579058215, now seen corresponding path program 1 times [2021-11-07 02:05:32,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:32,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1403184835] [2021-11-07 02:05:32,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:32,722 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:32,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:32,723 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:32,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:05:33,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:33,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:05:33,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:33,645 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:33,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:33,797 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:33,797 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:33,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1403184835] [2021-11-07 02:05:33,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1403184835] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:33,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:33,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:05:33,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787268587] [2021-11-07 02:05:33,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:05:33,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:33,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:05:33,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:05:33,799 INFO L87 Difference]: Start difference. First operand 44099 states and 79446 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:35,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:35,832 INFO L93 Difference]: Finished difference Result 88557 states and 159496 transitions. [2021-11-07 02:05:35,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:05:35,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 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 02:05:35,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:35,901 INFO L225 Difference]: With dead ends: 88557 [2021-11-07 02:05:35,901 INFO L226 Difference]: Without dead ends: 44760 [2021-11-07 02:05:35,922 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:05:35,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44760 states. [2021-11-07 02:05:38,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44760 to 44099. [2021-11-07 02:05:38,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44099 states, 44093 states have (on average 1.7988796407593042) internal successors, (79318), 44098 states have internal predecessors, (79318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:38,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44099 states to 44099 states and 79318 transitions. [2021-11-07 02:05:38,323 INFO L78 Accepts]: Start accepts. Automaton has 44099 states and 79318 transitions. Word has length 78 [2021-11-07 02:05:38,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:38,323 INFO L470 AbstractCegarLoop]: Abstraction has 44099 states and 79318 transitions. [2021-11-07 02:05:38,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:38,323 INFO L276 IsEmpty]: Start isEmpty. Operand 44099 states and 79318 transitions. [2021-11-07 02:05:38,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 02:05:38,330 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:38,331 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 02:05:38,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:38,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:38,531 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 02:05:38,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:38,532 INFO L85 PathProgramCache]: Analyzing trace with hash -460514662, now seen corresponding path program 1 times [2021-11-07 02:05:38,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:38,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [913212214] [2021-11-07 02:05:38,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:38,532 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:38,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:38,533 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:38,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23e976a4-0042-4a11-bf5f-5bee8dd58c2a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:05:39,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:39,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:05:39,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:39,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:39,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:39,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:05:39,612 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:39,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [913212214] [2021-11-07 02:05:39,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [913212214] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:39,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:39,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:05:39,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282317712] [2021-11-07 02:05:39,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:05:39,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:39,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:05:39,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:05:39,614 INFO L87 Difference]: Start difference. First operand 44099 states and 79318 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 02:05:43,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:43,233 INFO L93 Difference]: Finished difference Result 123799 states and 222418 transitions. [2021-11-07 02:05:43,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:05:43,233 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 02:05:43,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:43,377 INFO L225 Difference]: With dead ends: 123799 [2021-11-07 02:05:43,378 INFO L226 Difference]: Without dead ends: 79962 [2021-11-07 02:05:43,406 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 02:05:43,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79962 states.