./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec11_product18.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_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/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_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/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_7804b904-1541-4498-a221-830246868080/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 58fd69d2f74506159a7a57598b08a18ff098ebf1233f7e6688a335d4e30dd566 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:11:12,426 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:11:12,428 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:11:12,467 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:11:12,468 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:11:12,469 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:11:12,472 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:11:12,475 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:11:12,478 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:11:12,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:11:12,481 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:11:12,483 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:11:12,484 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:11:12,485 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:11:12,488 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:11:12,490 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:11:12,491 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:11:12,493 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:11:12,496 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:11:12,500 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:11:12,502 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:11:12,512 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:11:12,514 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:11:12,516 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:11:12,521 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:11:12,524 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:11:12,525 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:11:12,526 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:11:12,528 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:11:12,530 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:11:12,531 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:11:12,532 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:11:12,535 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:11:12,536 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:11:12,538 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:11:12,539 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:11:12,540 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:11:12,540 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:11:12,540 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:11:12,542 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:11:12,543 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:11:12,544 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:11:12,597 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:11:12,602 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:11:12,604 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:11:12,605 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:11:12,605 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:11:12,605 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:11:12,605 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:11:12,606 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:11:12,606 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:11:12,606 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:11:12,608 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:11:12,608 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:11:12,608 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:11:12,609 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:11:12,609 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:11:12,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:11:12,610 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:11:12,611 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:11:12,611 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:11:12,611 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:11:12,611 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:11:12,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:11:12,612 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:11:12,612 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:11:12,613 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:11:12,613 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:11:12,613 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:11:12,613 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:11:12,614 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:11:12,616 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:11:12,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:11:12,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:11:12,617 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:11:12,617 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:11:12,618 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:11:12,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:11:12,618 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:11:12,618 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:11:12,619 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:11:12,619 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_7804b904-1541-4498-a221-830246868080/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 58fd69d2f74506159a7a57598b08a18ff098ebf1233f7e6688a335d4e30dd566 [2021-11-07 02:11:12,993 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:11:13,019 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:11:13,022 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:11:13,024 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:11:13,025 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:11:13,026 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec11_product18.cil.c [2021-11-07 02:11:13,102 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/data/ced4e93ec/42b6da2aea6b44bbbc6fc5eee81affbf/FLAG3f107df65 [2021-11-07 02:11:13,903 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:11:13,903 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/sv-benchmarks/c/product-lines/email_spec11_product18.cil.c [2021-11-07 02:11:13,930 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/data/ced4e93ec/42b6da2aea6b44bbbc6fc5eee81affbf/FLAG3f107df65 [2021-11-07 02:11:14,020 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/data/ced4e93ec/42b6da2aea6b44bbbc6fc5eee81affbf [2021-11-07 02:11:14,023 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:11:14,025 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:11:14,027 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:11:14,028 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:11:14,032 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:11:14,033 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:11:14" (1/1) ... [2021-11-07 02:11:14,034 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bf9e3d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:14, skipping insertion in model container [2021-11-07 02:11:14,035 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:11:14" (1/1) ... [2021-11-07 02:11:14,044 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:11:14,148 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:11:14,909 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_7804b904-1541-4498-a221-830246868080/sv-benchmarks/c/product-lines/email_spec11_product18.cil.c[57905,57918] [2021-11-07 02:11:14,954 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:11:14,975 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 02:11:14,977 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1eb110db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:14, skipping insertion in model container [2021-11-07 02:11:14,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:11:14,977 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:11:14,981 INFO L168 Benchmark]: Toolchain (without parser) took 953.45 ms. Allocated memory is still 117.4 MB. Free memory was 76.5 MB in the beginning and 79.1 MB in the end (delta: -2.5 MB). Peak memory consumption was 13.0 MB. Max. memory is 16.1 GB. [2021-11-07 02:11:14,983 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 117.4 MB. Free memory was 95.2 MB in the beginning and 95.2 MB in the end (delta: 52.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:11:14,986 INFO L168 Benchmark]: CACSL2BoogieTranslator took 950.09 ms. Allocated memory is still 117.4 MB. Free memory was 76.3 MB in the beginning and 79.4 MB in the end (delta: -3.1 MB). Peak memory consumption was 13.0 MB. Max. memory is 16.1 GB. [2021-11-07 02:11:14,989 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 117.4 MB. Free memory was 95.2 MB in the beginning and 95.2 MB in the end (delta: 52.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 950.09 ms. Allocated memory is still 117.4 MB. Free memory was 76.3 MB in the beginning and 79.4 MB in the end (delta: -3.1 MB). Peak memory consumption was 13.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1960]: 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_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/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_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/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_7804b904-1541-4498-a221-830246868080/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 58fd69d2f74506159a7a57598b08a18ff098ebf1233f7e6688a335d4e30dd566 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:11:17,736 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:11:17,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:11:17,774 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:11:17,775 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:11:17,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:11:17,779 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:11:17,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:11:17,784 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:11:17,786 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:11:17,788 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:11:17,790 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:11:17,790 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:11:17,792 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:11:17,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:11:17,797 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:11:17,798 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:11:17,800 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:11:17,803 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:11:17,806 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:11:17,808 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:11:17,810 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:11:17,812 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:11:17,813 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:11:17,818 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:11:17,818 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:11:17,819 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:11:17,820 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:11:17,821 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:11:17,822 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:11:17,823 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:11:17,824 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:11:17,825 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:11:17,827 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:11:17,835 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:11:17,835 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:11:17,836 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:11:17,837 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:11:17,837 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:11:17,838 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:11:17,839 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:11:17,843 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:11:17,888 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:11:17,889 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:11:17,890 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:11:17,890 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:11:17,890 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:11:17,891 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:11:17,891 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:11:17,891 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:11:17,891 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:11:17,892 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:11:17,893 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:11:17,893 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:11:17,893 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:11:17,893 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:11:17,893 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:11:17,894 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:11:17,894 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:11:17,894 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:11:17,894 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:11:17,895 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:11:17,895 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:11:17,895 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:11:17,895 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:11:17,896 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:11:17,896 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:11:17,896 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:11:17,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:11:17,896 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:11:17,897 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:11:17,897 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:11:17,897 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:11:17,897 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:11:17,898 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:11:17,898 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:11:17,898 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:11:17,898 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_7804b904-1541-4498-a221-830246868080/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 58fd69d2f74506159a7a57598b08a18ff098ebf1233f7e6688a335d4e30dd566 [2021-11-07 02:11:18,354 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:11:18,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:11:18,395 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:11:18,397 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:11:18,399 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:11:18,400 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec11_product18.cil.c [2021-11-07 02:11:18,471 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/data/e25501b52/f9334754ad7449b88c15a6ca4f945d5c/FLAG5a98b3327 [2021-11-07 02:11:19,261 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:11:19,263 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/sv-benchmarks/c/product-lines/email_spec11_product18.cil.c [2021-11-07 02:11:19,297 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/data/e25501b52/f9334754ad7449b88c15a6ca4f945d5c/FLAG5a98b3327 [2021-11-07 02:11:19,398 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/data/e25501b52/f9334754ad7449b88c15a6ca4f945d5c [2021-11-07 02:11:19,404 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:11:19,408 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:11:19,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:11:19,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:11:19,416 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:11:19,418 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:11:19" (1/1) ... [2021-11-07 02:11:19,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5aa38fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:19, skipping insertion in model container [2021-11-07 02:11:19,420 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:11:19" (1/1) ... [2021-11-07 02:11:19,431 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:11:19,580 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:11:20,341 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_7804b904-1541-4498-a221-830246868080/sv-benchmarks/c/product-lines/email_spec11_product18.cil.c[57905,57918] [2021-11-07 02:11:20,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:11:20,400 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:11:20,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:11:20,605 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_7804b904-1541-4498-a221-830246868080/sv-benchmarks/c/product-lines/email_spec11_product18.cil.c[57905,57918] [2021-11-07 02:11:20,631 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:11:20,639 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:11:20,747 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_7804b904-1541-4498-a221-830246868080/sv-benchmarks/c/product-lines/email_spec11_product18.cil.c[57905,57918] [2021-11-07 02:11:20,760 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:11:20,820 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:11:20,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:20 WrapperNode [2021-11-07 02:11:20,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:11:20,823 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:11:20,823 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:11:20,823 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:11:20,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:20" (1/1) ... [2021-11-07 02:11:20,910 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:20" (1/1) ... [2021-11-07 02:11:21,013 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:11:21,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:11:21,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:11:21,030 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:11:21,040 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:20" (1/1) ... [2021-11-07 02:11:21,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:20" (1/1) ... [2021-11-07 02:11:21,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:20" (1/1) ... [2021-11-07 02:11:21,066 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:20" (1/1) ... [2021-11-07 02:11:21,122 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:20" (1/1) ... [2021-11-07 02:11:21,166 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:20" (1/1) ... [2021-11-07 02:11:21,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:20" (1/1) ... [2021-11-07 02:11:21,197 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:11:21,204 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:11:21,205 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:11:21,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:11:21,207 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:20" (1/1) ... [2021-11-07 02:11:21,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:11:21,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:11:21,247 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:11:21,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:11:21,318 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 02:11:21,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:11:21,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:11:21,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:11:21,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:11:25,967 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:11:25,973 INFO L299 CfgBuilder]: Removed 259 assume(true) statements. [2021-11-07 02:11:25,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:11:25 BoogieIcfgContainer [2021-11-07 02:11:25,979 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:11:25,981 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:11:25,982 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:11:25,986 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:11:25,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:11:19" (1/3) ... [2021-11-07 02:11:25,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2854f488 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:11:25, skipping insertion in model container [2021-11-07 02:11:26,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:20" (2/3) ... [2021-11-07 02:11:26,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2854f488 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:11:26, skipping insertion in model container [2021-11-07 02:11:26,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:11:25" (3/3) ... [2021-11-07 02:11:26,015 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec11_product18.cil.c [2021-11-07 02:11:26,021 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:11:26,022 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 02:11:26,090 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:11:26,098 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 02:11:26,098 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 02:11:26,128 INFO L276 IsEmpty]: Start isEmpty. Operand has 397 states, 394 states have (on average 1.7614213197969544) internal successors, (694), 396 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:26,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 02:11:26,144 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:26,145 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:11:26,146 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:11:26,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:26,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1400822452, now seen corresponding path program 1 times [2021-11-07 02:11:26,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:11:26,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1030797161] [2021-11-07 02:11:26,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:26,173 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:11:26,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:11:26,177 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:11:26,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:11:26,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:26,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:11:26,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:26,938 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 02:11:26,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:27,090 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 02:11:27,091 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:27,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1030797161] [2021-11-07 02:11:27,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1030797161] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:27,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:11:27,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:11:27,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976381232] [2021-11-07 02:11:27,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:11:27,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:27,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:11:27,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:11:27,128 INFO L87 Difference]: Start difference. First operand has 397 states, 394 states have (on average 1.7614213197969544) internal successors, (694), 396 states have internal predecessors, (694), 0 states have call successors, (0), 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 22.5) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:27,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:27,248 INFO L93 Difference]: Finished difference Result 552 states and 947 transitions. [2021-11-07 02:11:27,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:11:27,250 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 02:11:27,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:27,287 INFO L225 Difference]: With dead ends: 552 [2021-11-07 02:11:27,287 INFO L226 Difference]: Without dead ends: 386 [2021-11-07 02:11:27,292 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 88 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 02:11:27,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-11-07 02:11:27,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 386. [2021-11-07 02:11:27,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 384 states have (on average 1.75) internal successors, (672), 385 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:27,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 672 transitions. [2021-11-07 02:11:27,392 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 672 transitions. Word has length 45 [2021-11-07 02:11:27,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:27,392 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 672 transitions. [2021-11-07 02:11:27,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:27,393 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 672 transitions. [2021-11-07 02:11:27,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 02:11:27,398 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:27,398 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:11:27,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:27,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:11:27,623 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:11:27,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:27,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1356033473, now seen corresponding path program 1 times [2021-11-07 02:11:27,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:11:27,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [23859769] [2021-11-07 02:11:27,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:27,626 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:11:27,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:11:27,629 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:11:27,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:11:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:28,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:11:28,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:28,203 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 02:11:28,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:28,353 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 02:11:28,353 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:28,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [23859769] [2021-11-07 02:11:28,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [23859769] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:28,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:11:28,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:11:28,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827964050] [2021-11-07 02:11:28,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:11:28,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:28,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:11:28,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:11:28,364 INFO L87 Difference]: Start difference. First operand 386 states and 672 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:28,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:28,527 INFO L93 Difference]: Finished difference Result 1128 states and 1968 transitions. [2021-11-07 02:11:28,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:11:28,527 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-07 02:11:28,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:28,535 INFO L225 Difference]: With dead ends: 1128 [2021-11-07 02:11:28,535 INFO L226 Difference]: Without dead ends: 757 [2021-11-07 02:11:28,542 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 88 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 02:11:28,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-11-07 02:11:28,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 385. [2021-11-07 02:11:28,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 383 states have (on average 1.7415143603133159) internal successors, (667), 384 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:28,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 667 transitions. [2021-11-07 02:11:28,607 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 667 transitions. Word has length 46 [2021-11-07 02:11:28,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:28,608 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 667 transitions. [2021-11-07 02:11:28,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:28,609 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 667 transitions. [2021-11-07 02:11:28,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 02:11:28,622 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:28,623 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:11:28,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:28,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:11:28,824 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:11:28,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:28,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1649076071, now seen corresponding path program 1 times [2021-11-07 02:11:28,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:11:28,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1406558776] [2021-11-07 02:11:28,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:28,827 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:11:28,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:11:28,828 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:11:28,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:11:29,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:29,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:11:29,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:29,540 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 02:11:29,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:29,743 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 02:11:29,745 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:29,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1406558776] [2021-11-07 02:11:29,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1406558776] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:29,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:11:29,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:11:29,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516931217] [2021-11-07 02:11:29,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:11:29,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:29,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:11:29,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:11:29,754 INFO L87 Difference]: Start difference. First operand 385 states and 667 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:30,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:30,064 INFO L93 Difference]: Finished difference Result 1457 states and 2530 transitions. [2021-11-07 02:11:30,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:11:30,065 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 02:11:30,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:30,077 INFO L225 Difference]: With dead ends: 1457 [2021-11-07 02:11:30,077 INFO L226 Difference]: Without dead ends: 1090 [2021-11-07 02:11:30,079 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 90 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 02:11:30,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-11-07 02:11:30,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 384. [2021-11-07 02:11:30,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 382 states have (on average 1.7356020942408377) internal successors, (663), 383 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:30,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 663 transitions. [2021-11-07 02:11:30,121 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 663 transitions. Word has length 48 [2021-11-07 02:11:30,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:30,122 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 663 transitions. [2021-11-07 02:11:30,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:30,124 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 663 transitions. [2021-11-07 02:11:30,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 02:11:30,127 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:30,128 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:11:30,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:30,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:11:30,347 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:11:30,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:30,347 INFO L85 PathProgramCache]: Analyzing trace with hash 140592614, now seen corresponding path program 1 times [2021-11-07 02:11:30,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:11:30,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1723378558] [2021-11-07 02:11:30,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:30,349 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:11:30,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:11:30,352 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:11:30,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:11:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:30,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:11:30,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:31,031 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 02:11:31,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:31,232 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 02:11:31,232 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:31,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1723378558] [2021-11-07 02:11:31,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1723378558] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:31,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:11:31,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:11:31,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437773680] [2021-11-07 02:11:31,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:11:31,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:31,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:11:31,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:11:31,236 INFO L87 Difference]: Start difference. First operand 384 states and 663 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:31,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:31,307 INFO L93 Difference]: Finished difference Result 765 states and 1323 transitions. [2021-11-07 02:11:31,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:11:31,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 02:11:31,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:31,312 INFO L225 Difference]: With dead ends: 765 [2021-11-07 02:11:31,312 INFO L226 Difference]: Without dead ends: 389 [2021-11-07 02:11:31,313 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:11:31,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-11-07 02:11:31,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 384. [2021-11-07 02:11:31,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 382 states have (on average 1.7277486910994764) internal successors, (660), 383 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:31,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 660 transitions. [2021-11-07 02:11:31,347 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 660 transitions. Word has length 49 [2021-11-07 02:11:31,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:31,347 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 660 transitions. [2021-11-07 02:11:31,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:31,348 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 660 transitions. [2021-11-07 02:11:31,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 02:11:31,349 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:31,350 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] [2021-11-07 02:11:31,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:31,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:11:31,574 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:11:31,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:31,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1941161649, now seen corresponding path program 1 times [2021-11-07 02:11:31,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:11:31,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [126967077] [2021-11-07 02:11:31,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:31,576 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:11:31,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:11:31,578 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:11:31,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:11:32,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:32,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:11:32,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:32,287 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 02:11:32,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:32,451 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 02:11:32,456 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:32,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [126967077] [2021-11-07 02:11:32,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [126967077] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:32,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:11:32,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:11:32,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071483854] [2021-11-07 02:11:32,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:11:32,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:32,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:11:32,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:11:32,462 INFO L87 Difference]: Start difference. First operand 384 states and 660 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:32,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:32,751 INFO L93 Difference]: Finished difference Result 1444 states and 2506 transitions. [2021-11-07 02:11:32,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:11:32,752 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-07 02:11:32,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:32,762 INFO L225 Difference]: With dead ends: 1444 [2021-11-07 02:11:32,763 INFO L226 Difference]: Without dead ends: 1086 [2021-11-07 02:11:32,764 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 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 02:11:32,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-11-07 02:11:32,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 384. [2021-11-07 02:11:32,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 382 states have (on average 1.719895287958115) internal successors, (657), 383 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:32,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 657 transitions. [2021-11-07 02:11:32,807 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 657 transitions. Word has length 50 [2021-11-07 02:11:32,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:32,807 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 657 transitions. [2021-11-07 02:11:32,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:32,808 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 657 transitions. [2021-11-07 02:11:32,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 02:11:32,811 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:32,811 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 02:11:32,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:33,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:11:33,026 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:11:33,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:33,027 INFO L85 PathProgramCache]: Analyzing trace with hash 91475862, now seen corresponding path program 1 times [2021-11-07 02:11:33,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:11:33,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [265601505] [2021-11-07 02:11:33,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:33,028 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:11:33,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:11:33,029 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:11:33,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:11:33,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:33,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:11:33,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:33,719 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 02:11:33,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:33,866 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 02:11:33,867 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:33,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [265601505] [2021-11-07 02:11:33,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [265601505] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:33,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:11:33,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:11:33,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120035634] [2021-11-07 02:11:33,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:11:33,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:33,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:11:33,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:11:33,869 INFO L87 Difference]: Start difference. First operand 384 states and 657 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:34,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:34,018 INFO L93 Difference]: Finished difference Result 886 states and 1518 transitions. [2021-11-07 02:11:34,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:11:34,019 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 02:11:34,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:34,025 INFO L225 Difference]: With dead ends: 886 [2021-11-07 02:11:34,025 INFO L226 Difference]: Without dead ends: 742 [2021-11-07 02:11:34,026 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 02:11:34,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-11-07 02:11:34,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 598. [2021-11-07 02:11:34,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 596 states have (on average 1.7583892617449663) internal successors, (1048), 597 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:34,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1048 transitions. [2021-11-07 02:11:34,083 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1048 transitions. Word has length 52 [2021-11-07 02:11:34,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:34,083 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 1048 transitions. [2021-11-07 02:11:34,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:34,084 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1048 transitions. [2021-11-07 02:11:34,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 02:11:34,085 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:34,086 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:11:34,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:34,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:11:34,305 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:11:34,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:34,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1568595547, now seen corresponding path program 1 times [2021-11-07 02:11:34,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:11:34,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543915436] [2021-11-07 02:11:34,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:34,307 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:11:34,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:11:34,308 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:11:34,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:11:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:34,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:11:34,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:35,064 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 02:11:35,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:35,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:11:35,278 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:35,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1543915436] [2021-11-07 02:11:35,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1543915436] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:35,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:11:35,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:11:35,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041567159] [2021-11-07 02:11:35,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:11:35,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:35,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:11:35,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:11:35,281 INFO L87 Difference]: Start difference. First operand 598 states and 1048 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:35,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:35,380 INFO L93 Difference]: Finished difference Result 1418 states and 2492 transitions. [2021-11-07 02:11:35,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:11:35,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 02:11:35,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:35,387 INFO L225 Difference]: With dead ends: 1418 [2021-11-07 02:11:35,388 INFO L226 Difference]: Without dead ends: 904 [2021-11-07 02:11:35,390 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:11:35,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-11-07 02:11:35,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 760. [2021-11-07 02:11:35,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 758 states have (on average 1.770448548812665) internal successors, (1342), 759 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:35,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 1342 transitions. [2021-11-07 02:11:35,477 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 1342 transitions. Word has length 64 [2021-11-07 02:11:35,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:35,480 INFO L470 AbstractCegarLoop]: Abstraction has 760 states and 1342 transitions. [2021-11-07 02:11:35,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:35,480 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 1342 transitions. [2021-11-07 02:11:35,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 02:11:35,482 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:35,482 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:11:35,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-07 02:11:35,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:11:35,697 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:11:35,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:35,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1165983322, now seen corresponding path program 1 times [2021-11-07 02:11:35,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:11:35,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1653514563] [2021-11-07 02:11:35,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:35,699 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:11:35,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:11:35,700 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:11:35,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:11:36,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:36,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:11:36,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:36,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:11:36,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:36,633 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 02:11:36,634 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:36,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1653514563] [2021-11-07 02:11:36,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1653514563] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:36,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:11:36,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:11:36,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653676152] [2021-11-07 02:11:36,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:11:36,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:36,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:11:36,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:11:36,641 INFO L87 Difference]: Start difference. First operand 760 states and 1342 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:36,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:36,766 INFO L93 Difference]: Finished difference Result 1936 states and 3439 transitions. [2021-11-07 02:11:36,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:11:36,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 02:11:36,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:36,777 INFO L225 Difference]: With dead ends: 1936 [2021-11-07 02:11:36,777 INFO L226 Difference]: Without dead ends: 1268 [2021-11-07 02:11:36,780 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:11:36,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2021-11-07 02:11:36,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 1124. [2021-11-07 02:11:36,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1122 states have (on average 1.7878787878787878) internal successors, (2006), 1123 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:36,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 2006 transitions. [2021-11-07 02:11:36,916 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 2006 transitions. Word has length 65 [2021-11-07 02:11:36,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:36,916 INFO L470 AbstractCegarLoop]: Abstraction has 1124 states and 2006 transitions. [2021-11-07 02:11:36,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:36,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 2006 transitions. [2021-11-07 02:11:36,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 02:11:36,920 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:36,920 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:11:36,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:37,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:11:37,145 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:11:37,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:37,146 INFO L85 PathProgramCache]: Analyzing trace with hash 390986551, now seen corresponding path program 1 times [2021-11-07 02:11:37,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:11:37,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1534760593] [2021-11-07 02:11:37,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:37,147 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:11:37,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:11:37,148 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:11:37,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:11:37,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:37,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:11:37,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:37,933 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 02:11:37,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:38,152 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 02:11:38,152 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:38,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1534760593] [2021-11-07 02:11:38,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1534760593] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:38,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:11:38,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:11:38,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464984569] [2021-11-07 02:11:38,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:11:38,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:38,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:11:38,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:11:38,155 INFO L87 Difference]: Start difference. First operand 1124 states and 2006 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:38,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:38,346 INFO L93 Difference]: Finished difference Result 3008 states and 5400 transitions. [2021-11-07 02:11:38,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:11:38,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 02:11:38,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:38,362 INFO L225 Difference]: With dead ends: 3008 [2021-11-07 02:11:38,362 INFO L226 Difference]: Without dead ends: 1984 [2021-11-07 02:11:38,367 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:11:38,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2021-11-07 02:11:38,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1840. [2021-11-07 02:11:38,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1840 states, 1838 states have (on average 1.8025027203482045) internal successors, (3313), 1839 states have internal predecessors, (3313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:38,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 3313 transitions. [2021-11-07 02:11:38,552 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 3313 transitions. Word has length 66 [2021-11-07 02:11:38,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:38,552 INFO L470 AbstractCegarLoop]: Abstraction has 1840 states and 3313 transitions. [2021-11-07 02:11:38,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:38,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 3313 transitions. [2021-11-07 02:11:38,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 02:11:38,557 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:38,557 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:11:38,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:38,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:11:38,775 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:11:38,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:38,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1611877815, now seen corresponding path program 1 times [2021-11-07 02:11:38,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:11:38,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1001390672] [2021-11-07 02:11:38,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:38,777 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:11:38,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:11:38,779 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:11:38,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:11:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:39,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:11:39,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:39,635 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 02:11:39,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:39,837 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 02:11:39,837 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:39,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1001390672] [2021-11-07 02:11:39,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1001390672] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:39,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:11:39,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:11:39,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433524708] [2021-11-07 02:11:39,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:11:39,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:39,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:11:39,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:11:39,840 INFO L87 Difference]: Start difference. First operand 1840 states and 3313 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:40,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:40,105 INFO L93 Difference]: Finished difference Result 4892 states and 8840 transitions. [2021-11-07 02:11:40,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:11:40,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 02:11:40,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:40,131 INFO L225 Difference]: With dead ends: 4892 [2021-11-07 02:11:40,131 INFO L226 Difference]: Without dead ends: 3186 [2021-11-07 02:11:40,135 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:11:40,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3186 states. [2021-11-07 02:11:40,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3186 to 3042. [2021-11-07 02:11:40,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3042 states, 3040 states have (on average 1.8098684210526317) internal successors, (5502), 3041 states have internal predecessors, (5502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:40,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3042 states to 3042 states and 5502 transitions. [2021-11-07 02:11:40,425 INFO L78 Accepts]: Start accepts. Automaton has 3042 states and 5502 transitions. Word has length 67 [2021-11-07 02:11:40,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:40,426 INFO L470 AbstractCegarLoop]: Abstraction has 3042 states and 5502 transitions. [2021-11-07 02:11:40,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:40,426 INFO L276 IsEmpty]: Start isEmpty. Operand 3042 states and 5502 transitions. [2021-11-07 02:11:40,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 02:11:40,441 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:40,441 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:11:40,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:40,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:11:40,659 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:11:40,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:40,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1959710938, now seen corresponding path program 1 times [2021-11-07 02:11:40,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:11:40,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1546962974] [2021-11-07 02:11:40,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:40,661 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:11:40,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:11:40,663 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:11:40,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:11:41,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:41,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:11:41,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:41,441 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 02:11:41,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:41,646 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 02:11:41,646 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:41,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1546962974] [2021-11-07 02:11:41,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1546962974] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:41,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:11:41,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:11:41,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103350425] [2021-11-07 02:11:41,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:11:41,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:41,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:11:41,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:11:41,649 INFO L87 Difference]: Start difference. First operand 3042 states and 5502 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:42,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:42,101 INFO L93 Difference]: Finished difference Result 8214 states and 14890 transitions. [2021-11-07 02:11:42,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:11:42,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 02:11:42,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:42,143 INFO L225 Difference]: With dead ends: 8214 [2021-11-07 02:11:42,143 INFO L226 Difference]: Without dead ends: 5340 [2021-11-07 02:11:42,149 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:11:42,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5340 states. [2021-11-07 02:11:42,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5340 to 5196. [2021-11-07 02:11:42,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5196 states, 5194 states have (on average 1.8126684636118597) internal successors, (9415), 5195 states have internal predecessors, (9415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:42,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5196 states to 5196 states and 9415 transitions. [2021-11-07 02:11:42,632 INFO L78 Accepts]: Start accepts. Automaton has 5196 states and 9415 transitions. Word has length 68 [2021-11-07 02:11:42,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:42,633 INFO L470 AbstractCegarLoop]: Abstraction has 5196 states and 9415 transitions. [2021-11-07 02:11:42,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:42,634 INFO L276 IsEmpty]: Start isEmpty. Operand 5196 states and 9415 transitions. [2021-11-07 02:11:42,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 02:11:42,640 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:42,641 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:11:42,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:42,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:11:42,864 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:11:42,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:42,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1840332486, now seen corresponding path program 1 times [2021-11-07 02:11:42,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:11:42,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1222761311] [2021-11-07 02:11:42,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:42,866 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:11:42,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:11:42,867 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:11:42,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:11:43,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:43,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:11:43,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:43,728 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 02:11:43,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:43,940 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 02:11:43,941 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:43,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1222761311] [2021-11-07 02:11:43,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1222761311] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:43,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:11:43,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:11:43,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117767050] [2021-11-07 02:11:43,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:11:43,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:43,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:11:43,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:11:43,943 INFO L87 Difference]: Start difference. First operand 5196 states and 9415 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:44,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:44,645 INFO L93 Difference]: Finished difference Result 15134 states and 27471 transitions. [2021-11-07 02:11:44,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:11:44,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 02:11:44,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:44,718 INFO L225 Difference]: With dead ends: 15134 [2021-11-07 02:11:44,718 INFO L226 Difference]: Without dead ends: 10110 [2021-11-07 02:11:44,727 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:11:44,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10110 states. [2021-11-07 02:11:45,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10110 to 9966. [2021-11-07 02:11:45,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9966 states, 9964 states have (on average 1.81372942593336) internal successors, (18072), 9965 states have internal predecessors, (18072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:45,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9966 states to 9966 states and 18072 transitions. [2021-11-07 02:11:45,556 INFO L78 Accepts]: Start accepts. Automaton has 9966 states and 18072 transitions. Word has length 69 [2021-11-07 02:11:45,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:45,556 INFO L470 AbstractCegarLoop]: Abstraction has 9966 states and 18072 transitions. [2021-11-07 02:11:45,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:45,557 INFO L276 IsEmpty]: Start isEmpty. Operand 9966 states and 18072 transitions. [2021-11-07 02:11:45,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 02:11:45,566 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:45,566 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] [2021-11-07 02:11:45,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:45,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:11:45,781 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:11:45,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:45,782 INFO L85 PathProgramCache]: Analyzing trace with hash 353959158, now seen corresponding path program 1 times [2021-11-07 02:11:45,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:11:45,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1576397096] [2021-11-07 02:11:45,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:45,783 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:11:45,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:11:45,785 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:11:45,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:11:46,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:46,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:11:46,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:46,878 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 02:11:46,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:47,159 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 02:11:47,159 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:47,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1576397096] [2021-11-07 02:11:47,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1576397096] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:47,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:11:47,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:11:47,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699751557] [2021-11-07 02:11:47,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:11:47,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:47,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:11:47,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:11:47,162 INFO L87 Difference]: Start difference. First operand 9966 states and 18072 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:50,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:50,174 INFO L93 Difference]: Finished difference Result 24529 states and 44495 transitions. [2021-11-07 02:11:50,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:11:50,175 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 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 02:11:50,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:50,229 INFO L225 Difference]: With dead ends: 24529 [2021-11-07 02:11:50,229 INFO L226 Difference]: Without dead ends: 14813 [2021-11-07 02:11:50,246 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 134 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 02:11:50,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14813 states. [2021-11-07 02:11:51,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14813 to 9933. [2021-11-07 02:11:51,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9933 states, 9931 states have (on average 1.8064646057798812) internal successors, (17940), 9932 states have internal predecessors, (17940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:51,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9933 states to 9933 states and 17940 transitions. [2021-11-07 02:11:51,242 INFO L78 Accepts]: Start accepts. Automaton has 9933 states and 17940 transitions. Word has length 70 [2021-11-07 02:11:51,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:51,243 INFO L470 AbstractCegarLoop]: Abstraction has 9933 states and 17940 transitions. [2021-11-07 02:11:51,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:51,244 INFO L276 IsEmpty]: Start isEmpty. Operand 9933 states and 17940 transitions. [2021-11-07 02:11:51,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 02:11:51,254 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:51,254 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 02:11:51,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:51,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:11:51,481 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:11:51,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:51,482 INFO L85 PathProgramCache]: Analyzing trace with hash 998555159, now seen corresponding path program 1 times [2021-11-07 02:11:51,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:11:51,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [662160943] [2021-11-07 02:11:51,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:51,483 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:11:51,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:11:51,484 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:11:51,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:11:52,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:52,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:11:52,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:52,637 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 02:11:52,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:52,849 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 02:11:52,850 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:52,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [662160943] [2021-11-07 02:11:52,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [662160943] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:52,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:11:52,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:11:52,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703357306] [2021-11-07 02:11:52,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:11:52,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:52,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:11:52,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:11:52,853 INFO L87 Difference]: Start difference. First operand 9933 states and 17940 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 02:11:53,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:53,825 INFO L93 Difference]: Finished difference Result 29049 states and 52529 transitions. [2021-11-07 02:11:53,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:11:53,826 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 02:11:53,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:53,884 INFO L225 Difference]: With dead ends: 29049 [2021-11-07 02:11:53,885 INFO L226 Difference]: Without dead ends: 19295 [2021-11-07 02:11:53,903 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 02:11:53,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19295 states. [2021-11-07 02:11:55,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19295 to 19151. [2021-11-07 02:11:55,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19151 states, 19149 states have (on average 1.8058906470311766) internal successors, (34581), 19150 states have internal predecessors, (34581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:55,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19151 states to 19151 states and 34581 transitions. [2021-11-07 02:11:55,529 INFO L78 Accepts]: Start accepts. Automaton has 19151 states and 34581 transitions. Word has length 70 [2021-11-07 02:11:55,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:55,530 INFO L470 AbstractCegarLoop]: Abstraction has 19151 states and 34581 transitions. [2021-11-07 02:11:55,530 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 02:11:55,530 INFO L276 IsEmpty]: Start isEmpty. Operand 19151 states and 34581 transitions. [2021-11-07 02:11:55,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 02:11:55,542 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:55,543 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:11:55,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:55,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:11:55,757 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:11:55,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:55,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1854509244, now seen corresponding path program 1 times [2021-11-07 02:11:55,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:11:55,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1534512658] [2021-11-07 02:11:55,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:55,759 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:11:55,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:11:55,760 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:11:55,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:11:56,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:56,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:11:56,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:56,851 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 02:11:56,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:57,095 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 02:11:57,095 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:57,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1534512658] [2021-11-07 02:11:57,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1534512658] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:57,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:11:57,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:11:57,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373506602] [2021-11-07 02:11:57,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:11:57,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:57,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:11:57,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:11:57,098 INFO L87 Difference]: Start difference. First operand 19151 states and 34581 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 02:11:58,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:58,976 INFO L93 Difference]: Finished difference Result 56889 states and 102766 transitions. [2021-11-07 02:11:58,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:11:58,977 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 02:11:58,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:59,081 INFO L225 Difference]: With dead ends: 56889 [2021-11-07 02:11:59,081 INFO L226 Difference]: Without dead ends: 37921 [2021-11-07 02:11:59,108 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 02:11:59,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37921 states. [2021-11-07 02:12:01,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37921 to 37777. [2021-11-07 02:12:01,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37777 states, 37775 states have (on average 1.8032561217736598) internal successors, (68118), 37776 states have internal predecessors, (68118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:02,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37777 states to 37777 states and 68118 transitions. [2021-11-07 02:12:02,106 INFO L78 Accepts]: Start accepts. Automaton has 37777 states and 68118 transitions. Word has length 71 [2021-11-07 02:12:02,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:02,107 INFO L470 AbstractCegarLoop]: Abstraction has 37777 states and 68118 transitions. [2021-11-07 02:12:02,107 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 02:12:02,107 INFO L276 IsEmpty]: Start isEmpty. Operand 37777 states and 68118 transitions. [2021-11-07 02:12:02,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 02:12:02,119 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:02,119 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] [2021-11-07 02:12:02,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:02,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:12:02,333 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:12:02,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:02,333 INFO L85 PathProgramCache]: Analyzing trace with hash -2033361680, now seen corresponding path program 1 times [2021-11-07 02:12:02,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:02,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1500971026] [2021-11-07 02:12:02,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:02,334 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:02,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:02,335 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:02,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:12:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:03,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:12:03,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:03,354 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 02:12:03,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:03,610 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 02:12:03,610 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:12:03,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1500971026] [2021-11-07 02:12:03,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1500971026] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:12:03,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:12:03,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:12:03,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913455766] [2021-11-07 02:12:03,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:12:03,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:12:03,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:12:03,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:12:03,613 INFO L87 Difference]: Start difference. First operand 37777 states and 68118 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:11,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:11,505 INFO L93 Difference]: Finished difference Result 146517 states and 264040 transitions. [2021-11-07 02:12:11,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:12:11,506 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 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 02:12:11,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:11,809 INFO L225 Difference]: With dead ends: 146517 [2021-11-07 02:12:11,810 INFO L226 Difference]: Without dead ends: 108989 [2021-11-07 02:12:11,860 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 138 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 02:12:12,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108989 states. [2021-11-07 02:12:14,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108989 to 37519. [2021-11-07 02:12:15,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37519 states, 37517 states have (on average 1.7881493722845643) internal successors, (67086), 37518 states have internal predecessors, (67086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:15,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37519 states to 37519 states and 67086 transitions. [2021-11-07 02:12:15,098 INFO L78 Accepts]: Start accepts. Automaton has 37519 states and 67086 transitions. Word has length 72 [2021-11-07 02:12:15,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:15,099 INFO L470 AbstractCegarLoop]: Abstraction has 37519 states and 67086 transitions. [2021-11-07 02:12:15,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:15,099 INFO L276 IsEmpty]: Start isEmpty. Operand 37519 states and 67086 transitions. [2021-11-07 02:12:15,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 02:12:15,111 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:15,111 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] [2021-11-07 02:12:15,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-07 02:12:15,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:12:15,325 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:12:15,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:15,326 INFO L85 PathProgramCache]: Analyzing trace with hash 703274002, now seen corresponding path program 1 times [2021-11-07 02:12:15,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:15,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2018753061] [2021-11-07 02:12:15,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:15,327 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:15,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:15,329 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:15,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:12:16,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:16,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:12:16,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:16,358 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 02:12:16,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:16,578 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 02:12:16,578 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:12:16,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2018753061] [2021-11-07 02:12:16,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2018753061] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:12:16,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:12:16,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:12:16,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83116344] [2021-11-07 02:12:16,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:12:16,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:12:16,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:12:16,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:12:16,582 INFO L87 Difference]: Start difference. First operand 37519 states and 67086 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:18,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:18,804 INFO L93 Difference]: Finished difference Result 74927 states and 133986 transitions. [2021-11-07 02:12:18,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:12:18,807 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 02:12:18,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:18,870 INFO L225 Difference]: With dead ends: 74927 [2021-11-07 02:12:18,870 INFO L226 Difference]: Without dead ends: 37663 [2021-11-07 02:12:18,894 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 140 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 02:12:18,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37663 states. [2021-11-07 02:12:21,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37663 to 37519. [2021-11-07 02:12:21,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37519 states, 37517 states have (on average 1.7847375856278487) internal successors, (66958), 37518 states have internal predecessors, (66958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:21,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37519 states to 37519 states and 66958 transitions. [2021-11-07 02:12:21,301 INFO L78 Accepts]: Start accepts. Automaton has 37519 states and 66958 transitions. Word has length 72 [2021-11-07 02:12:21,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:21,302 INFO L470 AbstractCegarLoop]: Abstraction has 37519 states and 66958 transitions. [2021-11-07 02:12:21,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:21,302 INFO L276 IsEmpty]: Start isEmpty. Operand 37519 states and 66958 transitions. [2021-11-07 02:12:21,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 02:12:21,311 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:21,312 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 02:12:21,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:21,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:12:21,532 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:12:21,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:21,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1868125957, now seen corresponding path program 1 times [2021-11-07 02:12:21,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:21,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1709494458] [2021-11-07 02:12:21,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:21,533 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:21,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:21,534 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:21,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:12:22,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:22,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:12:22,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:22,794 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 02:12:22,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:22,989 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 02:12:22,989 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:12:22,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1709494458] [2021-11-07 02:12:22,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1709494458] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:12:22,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:12:22,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:12:22,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59735600] [2021-11-07 02:12:22,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:12:22,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:12:22,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:12:22,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:12:22,991 INFO L87 Difference]: Start difference. First operand 37519 states and 66958 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 02:12:26,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:26,516 INFO L93 Difference]: Finished difference Result 104153 states and 185516 transitions. [2021-11-07 02:12:26,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:12:26,517 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 02:12:26,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:26,638 INFO L225 Difference]: With dead ends: 104153 [2021-11-07 02:12:26,638 INFO L226 Difference]: Without dead ends: 66849 [2021-11-07 02:12:26,667 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 02:12:26,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66849 states. [2021-11-07 02:12:30,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66849 to 66705. [2021-11-07 02:12:30,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66705 states, 66703 states have (on average 1.7752574846708544) internal successors, (118415), 66704 states have internal predecessors, (118415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:30,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66705 states to 66705 states and 118415 transitions. [2021-11-07 02:12:30,992 INFO L78 Accepts]: Start accepts. Automaton has 66705 states and 118415 transitions. Word has length 72 [2021-11-07 02:12:30,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:30,992 INFO L470 AbstractCegarLoop]: Abstraction has 66705 states and 118415 transitions. [2021-11-07 02:12:30,992 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 02:12:30,992 INFO L276 IsEmpty]: Start isEmpty. Operand 66705 states and 118415 transitions. [2021-11-07 02:12:31,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 02:12:31,003 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:31,003 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] [2021-11-07 02:12:31,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:31,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:12:31,217 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:12:31,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:31,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1193061364, now seen corresponding path program 1 times [2021-11-07 02:12:31,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:31,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [824807010] [2021-11-07 02:12:31,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:31,218 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:31,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:31,219 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:31,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:12:32,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:32,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:12:32,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:32,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:32,621 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:32,621 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:12:32,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [824807010] [2021-11-07 02:12:32,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [824807010] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:12:32,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1519449472] [2021-11-07 02:12:32,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:32,626 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:12:32,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:12:32,628 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:12:32,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7804b904-1541-4498-a221-830246868080/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 02:12:33,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:33,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:12:33,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:34,130 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:12:34,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:34,443 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:12:34,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1519449472] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:12:34,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:12:34,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 02:12:34,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557242728] [2021-11-07 02:12:34,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:12:34,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:12:34,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:12:34,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:12:34,446 INFO L87 Difference]: Start difference. First operand 66705 states and 118415 transitions. Second operand has 10 states, 10 states have (on average 11.1) internal successors, (111), 10 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)