./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_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_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/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_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/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_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/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 4d9d31939acfea5ee9b43b1f06257671943c7251c27c351c5e445aa6495fd098 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:21:00,967 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:21:00,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:21:01,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:21:01,016 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:21:01,018 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:21:01,020 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:21:01,024 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:21:01,026 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:21:01,028 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:21:01,029 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:21:01,031 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:21:01,032 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:21:01,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:21:01,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:21:01,038 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:21:01,039 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:21:01,040 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:21:01,043 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:21:01,047 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:21:01,049 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:21:01,052 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:21:01,054 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:21:01,055 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:21:01,060 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:21:01,061 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:21:01,062 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:21:01,063 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:21:01,064 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:21:01,066 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:21:01,067 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:21:01,068 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:21:01,069 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:21:01,071 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:21:01,072 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:21:01,073 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:21:01,074 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:21:01,075 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:21:01,075 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:21:01,077 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:21:01,078 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:21:01,079 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:21:01,109 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:21:01,113 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:21:01,114 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:21:01,114 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:21:01,115 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:21:01,115 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:21:01,115 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:21:01,115 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:21:01,116 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:21:01,116 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:21:01,116 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:21:01,116 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:21:01,117 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:21:01,117 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:21:01,117 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:21:01,118 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:21:01,119 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:21:01,119 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:21:01,119 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:21:01,119 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:21:01,120 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:21:01,120 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:21:01,120 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:21:01,120 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:21:01,121 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:21:01,121 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:21:01,121 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:21:01,121 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:21:01,122 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:21:01,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:21:01,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:21:01,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:21:01,123 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:21:01,123 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:21:01,124 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:21:01,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:21:01,124 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:21:01,124 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:21:01,125 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:21:01,125 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_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d9d31939acfea5ee9b43b1f06257671943c7251c27c351c5e445aa6495fd098 [2021-11-07 02:21:01,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:21:01,509 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:21:01,512 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:21:01,513 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:21:01,514 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:21:01,515 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c [2021-11-07 02:21:01,613 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/data/5c3b56354/a518e9cc92dd43cd87d0d6b143f0e795/FLAG8d13896b2 [2021-11-07 02:21:02,410 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:21:02,413 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c [2021-11-07 02:21:02,450 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/data/5c3b56354/a518e9cc92dd43cd87d0d6b143f0e795/FLAG8d13896b2 [2021-11-07 02:21:02,592 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/data/5c3b56354/a518e9cc92dd43cd87d0d6b143f0e795 [2021-11-07 02:21:02,595 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:21:02,597 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:21:02,600 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:21:02,600 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:21:02,604 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:21:02,605 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:21:02" (1/1) ... [2021-11-07 02:21:02,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a834da0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:02, skipping insertion in model container [2021-11-07 02:21:02,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:21:02" (1/1) ... [2021-11-07 02:21:02,614 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:21:02,707 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:21:03,099 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_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c[38051,38064] [2021-11-07 02:21:03,276 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:21:03,289 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 02:21:03,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6bd179d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:03, skipping insertion in model container [2021-11-07 02:21:03,290 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:21:03,290 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:21:03,293 INFO L168 Benchmark]: Toolchain (without parser) took 694.17 ms. Allocated memory is still 100.7 MB. Free memory was 59.5 MB in the beginning and 62.3 MB in the end (delta: -2.8 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.1 GB. [2021-11-07 02:21:03,294 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 100.7 MB. Free memory was 78.9 MB in the beginning and 78.9 MB in the end (delta: 60.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:21:03,296 INFO L168 Benchmark]: CACSL2BoogieTranslator took 690.48 ms. Allocated memory is still 100.7 MB. Free memory was 59.3 MB in the beginning and 62.3 MB in the end (delta: -3.0 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.1 GB. [2021-11-07 02:21:03,298 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 100.7 MB. Free memory was 78.9 MB in the beginning and 78.9 MB in the end (delta: 60.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 690.48 ms. Allocated memory is still 100.7 MB. Free memory was 59.3 MB in the beginning and 62.3 MB in the end (delta: -3.0 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1863]: 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_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/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_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/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_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/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 4d9d31939acfea5ee9b43b1f06257671943c7251c27c351c5e445aa6495fd098 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:21:05,650 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:21:05,654 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:21:05,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:21:05,709 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:21:05,715 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:21:05,718 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:21:05,727 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:21:05,730 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:21:05,741 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:21:05,742 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:21:05,744 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:21:05,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:21:05,748 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:21:05,750 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:21:05,752 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:21:05,753 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:21:05,755 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:21:05,757 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:21:05,763 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:21:05,769 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:21:05,771 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:21:05,772 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:21:05,775 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:21:05,780 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:21:05,782 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:21:05,783 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:21:05,785 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:21:05,786 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:21:05,787 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:21:05,787 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:21:05,788 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:21:05,790 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:21:05,791 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:21:05,793 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:21:05,793 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:21:05,794 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:21:05,795 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:21:05,795 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:21:05,797 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:21:05,798 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:21:05,799 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:21:05,847 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:21:05,847 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:21:05,848 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:21:05,849 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:21:05,849 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:21:05,849 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:21:05,850 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:21:05,850 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:21:05,850 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:21:05,852 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:21:05,853 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:21:05,853 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:21:05,853 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:21:05,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:21:05,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:21:05,854 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:21:05,854 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:21:05,855 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:21:05,855 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:21:05,855 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:21:05,855 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:21:05,855 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:21:05,856 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:21:05,856 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:21:05,856 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:21:05,856 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:21:05,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:21:05,857 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:21:05,857 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:21:05,857 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:21:05,858 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:21:05,858 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:21:05,858 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:21:05,858 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:21:05,859 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:21:05,859 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_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d9d31939acfea5ee9b43b1f06257671943c7251c27c351c5e445aa6495fd098 [2021-11-07 02:21:06,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:21:06,266 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:21:06,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:21:06,269 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:21:06,272 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:21:06,273 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c [2021-11-07 02:21:06,354 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/data/358f52f23/7dcf7f2053a0476babea079dbead42ed/FLAG396271347 [2021-11-07 02:21:07,163 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:21:07,163 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c [2021-11-07 02:21:07,194 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/data/358f52f23/7dcf7f2053a0476babea079dbead42ed/FLAG396271347 [2021-11-07 02:21:07,372 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/data/358f52f23/7dcf7f2053a0476babea079dbead42ed [2021-11-07 02:21:07,374 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:21:07,376 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:21:07,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:21:07,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:21:07,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:21:07,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:21:07" (1/1) ... [2021-11-07 02:21:07,383 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3262bf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:07, skipping insertion in model container [2021-11-07 02:21:07,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:21:07" (1/1) ... [2021-11-07 02:21:07,391 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:21:07,464 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:21:07,877 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_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c[38051,38064] [2021-11-07 02:21:08,006 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:21:08,031 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:21:08,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:21:08,130 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_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c[38051,38064] [2021-11-07 02:21:08,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:21:08,180 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:21:08,289 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_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/sv-benchmarks/c/product-lines/elevator_spec2_product18.cil.c[38051,38064] [2021-11-07 02:21:08,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:21:08,357 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:21:08,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:08 WrapperNode [2021-11-07 02:21:08,358 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:21:08,359 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:21:08,359 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:21:08,359 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:21:08,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:08" (1/1) ... [2021-11-07 02:21:08,418 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:08" (1/1) ... [2021-11-07 02:21:08,767 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:21:08,768 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:21:08,768 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:21:08,769 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:21:08,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:08" (1/1) ... [2021-11-07 02:21:08,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:08" (1/1) ... [2021-11-07 02:21:08,823 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:08" (1/1) ... [2021-11-07 02:21:08,823 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:08" (1/1) ... [2021-11-07 02:21:09,117 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:08" (1/1) ... [2021-11-07 02:21:09,296 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:08" (1/1) ... [2021-11-07 02:21:09,312 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:08" (1/1) ... [2021-11-07 02:21:09,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:21:09,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:21:09,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:21:09,350 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:21:09,351 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:08" (1/1) ... [2021-11-07 02:21:09,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:21:09,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:21:09,383 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:21:09,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:21:09,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:21:09,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:21:09,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:21:09,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:21:23,641 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:21:23,642 INFO L299 CfgBuilder]: Removed 1029 assume(true) statements. [2021-11-07 02:21:23,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:21:23 BoogieIcfgContainer [2021-11-07 02:21:23,649 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:21:23,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:21:23,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:21:23,654 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:21:23,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:21:07" (1/3) ... [2021-11-07 02:21:23,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d46bf65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:21:23, skipping insertion in model container [2021-11-07 02:21:23,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:21:08" (2/3) ... [2021-11-07 02:21:23,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d46bf65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:21:23, skipping insertion in model container [2021-11-07 02:21:23,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:21:23" (3/3) ... [2021-11-07 02:21:23,658 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product18.cil.c [2021-11-07 02:21:23,663 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:21:23,664 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 02:21:23,732 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:21:23,740 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 02:21:23,740 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 02:21:23,837 INFO L276 IsEmpty]: Start isEmpty. Operand has 4644 states, 4638 states have (on average 1.8993100474342388) internal successors, (8809), 4643 states have internal predecessors, (8809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:23,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 02:21:23,848 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:23,849 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] [2021-11-07 02:21:23,850 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:21:23,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:23,856 INFO L85 PathProgramCache]: Analyzing trace with hash 380750393, now seen corresponding path program 1 times [2021-11-07 02:21:23,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:23,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [835389379] [2021-11-07 02:21:23,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:23,873 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:23,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:23,879 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:23,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:21:24,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:24,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:21:24,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:24,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:24,530 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 02:21:24,531 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:24,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [835389379] [2021-11-07 02:21:24,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [835389379] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:24,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:24,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:21:24,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373398147] [2021-11-07 02:21:24,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:21:24,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:24,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:21:24,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:21:24,574 INFO L87 Difference]: Start difference. First operand has 4644 states, 4638 states have (on average 1.8993100474342388) internal successors, (8809), 4643 states have internal predecessors, (8809), 0 states have call successors, (0), 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 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:24,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:24,778 INFO L93 Difference]: Finished difference Result 4663 states and 8832 transitions. [2021-11-07 02:21:24,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:21:24,779 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2021-11-07 02:21:24,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:24,833 INFO L225 Difference]: With dead ends: 4663 [2021-11-07 02:21:24,834 INFO L226 Difference]: Without dead ends: 4640 [2021-11-07 02:21:24,841 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 52 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 02:21:24,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4640 states. [2021-11-07 02:21:25,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4640 to 4640. [2021-11-07 02:21:25,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4640 states, 4635 states have (on average 1.8979503775620281) internal successors, (8797), 4639 states have internal predecessors, (8797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:25,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4640 states to 4640 states and 8797 transitions. [2021-11-07 02:21:25,196 INFO L78 Accepts]: Start accepts. Automaton has 4640 states and 8797 transitions. Word has length 27 [2021-11-07 02:21:25,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:25,197 INFO L470 AbstractCegarLoop]: Abstraction has 4640 states and 8797 transitions. [2021-11-07 02:21:25,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:25,198 INFO L276 IsEmpty]: Start isEmpty. Operand 4640 states and 8797 transitions. [2021-11-07 02:21:25,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 02:21:25,208 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:25,209 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] [2021-11-07 02:21:25,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:25,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:25,423 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:21:25,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:25,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1229286641, now seen corresponding path program 1 times [2021-11-07 02:21:25,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:25,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051902867] [2021-11-07 02:21:25,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:25,426 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:25,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:25,427 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:25,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:21:25,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:25,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:21:25,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:25,847 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 02:21:25,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:25,947 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 02:21:25,948 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:25,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051902867] [2021-11-07 02:21:25,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051902867] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:25,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:25,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:21:25,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430490419] [2021-11-07 02:21:25,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:21:25,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:25,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:21:25,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:21:25,953 INFO L87 Difference]: Start difference. First operand 4640 states and 8797 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:26,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:26,210 INFO L93 Difference]: Finished difference Result 9267 states and 17575 transitions. [2021-11-07 02:21:26,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:21:26,211 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 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 29 [2021-11-07 02:21:26,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:26,246 INFO L225 Difference]: With dead ends: 9267 [2021-11-07 02:21:26,246 INFO L226 Difference]: Without dead ends: 4640 [2021-11-07 02:21:26,256 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 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 02:21:26,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4640 states. [2021-11-07 02:21:26,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4640 to 4640. [2021-11-07 02:21:26,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4640 states, 4635 states have (on average 1.896655879180151) internal successors, (8791), 4639 states have internal predecessors, (8791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:26,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4640 states to 4640 states and 8791 transitions. [2021-11-07 02:21:26,428 INFO L78 Accepts]: Start accepts. Automaton has 4640 states and 8791 transitions. Word has length 29 [2021-11-07 02:21:26,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:26,428 INFO L470 AbstractCegarLoop]: Abstraction has 4640 states and 8791 transitions. [2021-11-07 02:21:26,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:26,429 INFO L276 IsEmpty]: Start isEmpty. Operand 4640 states and 8791 transitions. [2021-11-07 02:21:26,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 02:21:26,430 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:26,431 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] [2021-11-07 02:21:26,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:26,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:26,648 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:21:26,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:26,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1347733051, now seen corresponding path program 1 times [2021-11-07 02:21:26,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:26,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1690223230] [2021-11-07 02:21:26,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:26,652 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:26,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:26,653 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:26,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:21:27,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:27,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:21:27,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:27,144 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 02:21:27,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:27,251 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 02:21:27,251 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:27,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1690223230] [2021-11-07 02:21:27,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1690223230] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:27,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:27,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:21:27,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464156070] [2021-11-07 02:21:27,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:21:27,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:27,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:21:27,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:21:27,255 INFO L87 Difference]: Start difference. First operand 4640 states and 8791 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:27,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:27,704 INFO L93 Difference]: Finished difference Result 9231 states and 17498 transitions. [2021-11-07 02:21:27,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:21:27,706 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 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 34 [2021-11-07 02:21:27,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:27,740 INFO L225 Difference]: With dead ends: 9231 [2021-11-07 02:21:27,740 INFO L226 Difference]: Without dead ends: 4613 [2021-11-07 02:21:27,748 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 62 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 02:21:27,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4613 states. [2021-11-07 02:21:27,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4613 to 4613. [2021-11-07 02:21:27,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4613 states, 4608 states have (on average 1.8956163194444444) internal successors, (8735), 4612 states have internal predecessors, (8735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:27,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 8735 transitions. [2021-11-07 02:21:27,950 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 8735 transitions. Word has length 34 [2021-11-07 02:21:27,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:27,950 INFO L470 AbstractCegarLoop]: Abstraction has 4613 states and 8735 transitions. [2021-11-07 02:21:27,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:27,953 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 8735 transitions. [2021-11-07 02:21:27,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 02:21:27,954 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:27,955 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] [2021-11-07 02:21:27,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:28,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:28,170 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:21:28,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:28,174 INFO L85 PathProgramCache]: Analyzing trace with hash -306910237, now seen corresponding path program 1 times [2021-11-07 02:21:28,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:28,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1371791433] [2021-11-07 02:21:28,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:28,175 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:28,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:28,177 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:28,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:21:28,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:28,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:21:28,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:28,677 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 02:21:28,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:28,795 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 02:21:28,795 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:28,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1371791433] [2021-11-07 02:21:28,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1371791433] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:28,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:28,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:21:28,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607378944] [2021-11-07 02:21:28,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:21:28,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:28,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:21:28,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:21:28,799 INFO L87 Difference]: Start difference. First operand 4613 states and 8735 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:29,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:29,144 INFO L93 Difference]: Finished difference Result 9204 states and 17442 transitions. [2021-11-07 02:21:29,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:21:29,145 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 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 35 [2021-11-07 02:21:29,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:29,178 INFO L225 Difference]: With dead ends: 9204 [2021-11-07 02:21:29,178 INFO L226 Difference]: Without dead ends: 4613 [2021-11-07 02:21:29,186 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 66 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 02:21:29,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4613 states. [2021-11-07 02:21:29,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4613 to 4613. [2021-11-07 02:21:29,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4613 states, 4608 states have (on average 1.8943142361111112) internal successors, (8729), 4612 states have internal predecessors, (8729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:29,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 8729 transitions. [2021-11-07 02:21:29,429 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 8729 transitions. Word has length 35 [2021-11-07 02:21:29,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:29,430 INFO L470 AbstractCegarLoop]: Abstraction has 4613 states and 8729 transitions. [2021-11-07 02:21:29,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:29,430 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 8729 transitions. [2021-11-07 02:21:29,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 02:21:29,432 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:29,433 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] [2021-11-07 02:21:29,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:29,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:29,656 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:21:29,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:29,656 INFO L85 PathProgramCache]: Analyzing trace with hash -492095310, now seen corresponding path program 1 times [2021-11-07 02:21:29,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:29,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [855540122] [2021-11-07 02:21:29,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:29,658 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:29,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:29,659 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:29,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:21:30,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:30,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:21:30,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:30,239 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 02:21:30,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:30,394 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 02:21:30,395 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:30,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [855540122] [2021-11-07 02:21:30,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [855540122] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:30,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:30,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:21:30,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942281149] [2021-11-07 02:21:30,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:21:30,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:30,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:21:30,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:21:30,397 INFO L87 Difference]: Start difference. First operand 4613 states and 8729 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 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 02:21:30,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:30,825 INFO L93 Difference]: Finished difference Result 9198 states and 17425 transitions. [2021-11-07 02:21:30,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:21:30,826 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 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 40 [2021-11-07 02:21:30,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:30,870 INFO L225 Difference]: With dead ends: 9198 [2021-11-07 02:21:30,871 INFO L226 Difference]: Without dead ends: 4610 [2021-11-07 02:21:30,948 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:21:30,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4610 states. [2021-11-07 02:21:31,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4610 to 4610. [2021-11-07 02:21:31,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 4605 states have (on average 1.8938110749185668) internal successors, (8721), 4609 states have internal predecessors, (8721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:31,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 8721 transitions. [2021-11-07 02:21:31,129 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 8721 transitions. Word has length 40 [2021-11-07 02:21:31,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:31,130 INFO L470 AbstractCegarLoop]: Abstraction has 4610 states and 8721 transitions. [2021-11-07 02:21:31,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 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 02:21:31,130 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 8721 transitions. [2021-11-07 02:21:31,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 02:21:31,131 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:31,132 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:21:31,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:31,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:31,345 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:21:31,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:31,345 INFO L85 PathProgramCache]: Analyzing trace with hash -2106017566, now seen corresponding path program 1 times [2021-11-07 02:21:31,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:31,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1645751329] [2021-11-07 02:21:31,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:31,347 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:31,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:31,348 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:31,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:21:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:31,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:21:31,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:32,082 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 02:21:32,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:32,260 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 02:21:32,260 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:32,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1645751329] [2021-11-07 02:21:32,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1645751329] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:32,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:32,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 02:21:32,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737047869] [2021-11-07 02:21:32,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:21:32,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:32,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:21:32,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:21:32,263 INFO L87 Difference]: Start difference. First operand 4610 states and 8721 transitions. Second operand has 4 states, 4 states have (on average 17.5) 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 02:21:32,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:32,971 INFO L93 Difference]: Finished difference Result 12926 states and 24481 transitions. [2021-11-07 02:21:32,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:21:32,972 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) 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 41 [2021-11-07 02:21:32,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:33,004 INFO L225 Difference]: With dead ends: 12926 [2021-11-07 02:21:33,004 INFO L226 Difference]: Without dead ends: 10579 [2021-11-07 02:21:33,012 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 78 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 02:21:33,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10579 states. [2021-11-07 02:21:33,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10579 to 6170. [2021-11-07 02:21:33,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6170 states, 6165 states have (on average 1.8940794809407948) internal successors, (11677), 6169 states have internal predecessors, (11677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:33,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6170 states to 6170 states and 11677 transitions. [2021-11-07 02:21:33,418 INFO L78 Accepts]: Start accepts. Automaton has 6170 states and 11677 transitions. Word has length 41 [2021-11-07 02:21:33,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:33,419 INFO L470 AbstractCegarLoop]: Abstraction has 6170 states and 11677 transitions. [2021-11-07 02:21:33,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) 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 02:21:33,419 INFO L276 IsEmpty]: Start isEmpty. Operand 6170 states and 11677 transitions. [2021-11-07 02:21:33,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 02:21:33,424 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:33,424 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:21:33,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:33,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:33,638 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:21:33,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:33,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1676293061, now seen corresponding path program 1 times [2021-11-07 02:21:33,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:33,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [671936767] [2021-11-07 02:21:33,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:33,644 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:33,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:33,645 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:33,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:21:34,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:34,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:21:34,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:34,322 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 02:21:34,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:34,543 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 02:21:34,544 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:34,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [671936767] [2021-11-07 02:21:34,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [671936767] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:34,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:34,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 02:21:34,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227587365] [2021-11-07 02:21:34,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:21:34,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:34,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:21:34,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:21:34,546 INFO L87 Difference]: Start difference. First operand 6170 states and 11677 transitions. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:35,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:35,459 INFO L93 Difference]: Finished difference Result 11826 states and 22158 transitions. [2021-11-07 02:21:35,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:21:35,460 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 02:21:35,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:35,479 INFO L225 Difference]: With dead ends: 11826 [2021-11-07 02:21:35,479 INFO L226 Difference]: Without dead ends: 6821 [2021-11-07 02:21:35,486 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:21:35,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6821 states. [2021-11-07 02:21:35,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6821 to 4579. [2021-11-07 02:21:35,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4579 states, 4574 states have (on average 1.885439440314823) internal successors, (8624), 4578 states have internal predecessors, (8624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:35,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4579 states to 4579 states and 8624 transitions. [2021-11-07 02:21:35,722 INFO L78 Accepts]: Start accepts. Automaton has 4579 states and 8624 transitions. Word has length 54 [2021-11-07 02:21:35,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:35,722 INFO L470 AbstractCegarLoop]: Abstraction has 4579 states and 8624 transitions. [2021-11-07 02:21:35,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:35,723 INFO L276 IsEmpty]: Start isEmpty. Operand 4579 states and 8624 transitions. [2021-11-07 02:21:35,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 02:21:35,725 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:35,725 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:21:35,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:35,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:35,947 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:21:35,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:35,948 INFO L85 PathProgramCache]: Analyzing trace with hash -920679150, now seen corresponding path program 1 times [2021-11-07 02:21:35,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:35,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [383394118] [2021-11-07 02:21:35,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:35,949 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:35,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:35,956 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:35,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:21:36,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:36,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:21:36,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:36,696 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 02:21:36,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:36,898 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 02:21:36,899 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:36,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [383394118] [2021-11-07 02:21:36,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [383394118] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:36,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:36,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:21:36,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302870186] [2021-11-07 02:21:36,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:21:36,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:36,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:21:36,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:21:36,901 INFO L87 Difference]: Start difference. First operand 4579 states and 8624 transitions. Second operand has 5 states, 5 states have (on average 11.0) 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 02:21:40,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:40,141 INFO L93 Difference]: Finished difference Result 18412 states and 34625 transitions. [2021-11-07 02:21:40,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:21:40,142 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) 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 55 [2021-11-07 02:21:40,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:40,188 INFO L225 Difference]: With dead ends: 18412 [2021-11-07 02:21:40,188 INFO L226 Difference]: Without dead ends: 13876 [2021-11-07 02:21:40,199 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:21:40,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13876 states. [2021-11-07 02:21:40,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13876 to 4587. [2021-11-07 02:21:40,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4587 states, 4582 states have (on average 1.8838934962898297) internal successors, (8632), 4586 states have internal predecessors, (8632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:40,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4587 states to 4587 states and 8632 transitions. [2021-11-07 02:21:40,517 INFO L78 Accepts]: Start accepts. Automaton has 4587 states and 8632 transitions. Word has length 55 [2021-11-07 02:21:40,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:40,517 INFO L470 AbstractCegarLoop]: Abstraction has 4587 states and 8632 transitions. [2021-11-07 02:21:40,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) 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 02:21:40,518 INFO L276 IsEmpty]: Start isEmpty. Operand 4587 states and 8632 transitions. [2021-11-07 02:21:40,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 02:21:40,520 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:40,520 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:21:40,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:40,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:40,736 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:21:40,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:40,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1154382262, now seen corresponding path program 1 times [2021-11-07 02:21:40,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:40,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2094742791] [2021-11-07 02:21:40,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:40,737 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:40,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:40,738 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:40,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:21:41,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:41,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:21:41,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:41,393 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 02:21:41,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:41,548 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 02:21:41,548 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:41,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2094742791] [2021-11-07 02:21:41,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2094742791] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:41,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:41,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:21:41,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818155649] [2021-11-07 02:21:41,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:21:41,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:41,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:21:41,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:21:41,551 INFO L87 Difference]: Start difference. First operand 4587 states and 8632 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:49,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:49,495 INFO L93 Difference]: Finished difference Result 12889 states and 24198 transitions. [2021-11-07 02:21:49,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:21:49,495 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-07 02:21:49,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:49,524 INFO L225 Difference]: With dead ends: 12889 [2021-11-07 02:21:49,525 INFO L226 Difference]: Without dead ends: 9640 [2021-11-07 02:21:49,534 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:21:49,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9640 states. [2021-11-07 02:21:50,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9640 to 8593. [2021-11-07 02:21:50,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8593 states, 8588 states have (on average 1.8861201676758268) internal successors, (16198), 8592 states have internal predecessors, (16198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:50,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8593 states to 8593 states and 16198 transitions. [2021-11-07 02:21:50,055 INFO L78 Accepts]: Start accepts. Automaton has 8593 states and 16198 transitions. Word has length 56 [2021-11-07 02:21:50,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:50,057 INFO L470 AbstractCegarLoop]: Abstraction has 8593 states and 16198 transitions. [2021-11-07 02:21:50,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:50,057 INFO L276 IsEmpty]: Start isEmpty. Operand 8593 states and 16198 transitions. [2021-11-07 02:21:50,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 02:21:50,060 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:50,061 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:21:50,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:50,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:50,276 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:21:50,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:50,276 INFO L85 PathProgramCache]: Analyzing trace with hash -482526514, now seen corresponding path program 1 times [2021-11-07 02:21:50,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:50,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [739459914] [2021-11-07 02:21:50,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:50,277 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:50,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:50,279 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:50,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:21:50,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:50,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:21:50,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:51,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:51,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:51,234 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 02:21:51,234 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:51,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [739459914] [2021-11-07 02:21:51,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [739459914] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:51,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:51,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:21:51,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192496140] [2021-11-07 02:21:51,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:21:51,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:51,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:21:51,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:21:51,236 INFO L87 Difference]: Start difference. First operand 8593 states and 16198 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:53,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:53,707 INFO L93 Difference]: Finished difference Result 16787 states and 31464 transitions. [2021-11-07 02:21:53,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:21:53,707 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 02:21:53,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:53,730 INFO L225 Difference]: With dead ends: 16787 [2021-11-07 02:21:53,730 INFO L226 Difference]: Without dead ends: 9524 [2021-11-07 02:21:53,740 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:21:53,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9524 states. [2021-11-07 02:21:54,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9524 to 8525. [2021-11-07 02:21:54,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8525 states, 8520 states have (on average 1.8748826291079812) internal successors, (15974), 8524 states have internal predecessors, (15974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:54,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8525 states to 8525 states and 15974 transitions. [2021-11-07 02:21:54,191 INFO L78 Accepts]: Start accepts. Automaton has 8525 states and 15974 transitions. Word has length 57 [2021-11-07 02:21:54,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:54,192 INFO L470 AbstractCegarLoop]: Abstraction has 8525 states and 15974 transitions. [2021-11-07 02:21:54,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:54,192 INFO L276 IsEmpty]: Start isEmpty. Operand 8525 states and 15974 transitions. [2021-11-07 02:21:54,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 02:21:54,194 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:54,195 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:21:54,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:54,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:54,411 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:21:54,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:54,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1526979166, now seen corresponding path program 1 times [2021-11-07 02:21:54,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:54,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1952037368] [2021-11-07 02:21:54,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:54,412 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:54,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:54,413 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:54,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:21:54,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:54,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:21:54,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:55,155 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 02:21:55,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:55,356 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 02:21:55,357 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:55,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1952037368] [2021-11-07 02:21:55,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1952037368] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:55,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:55,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:21:55,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743796478] [2021-11-07 02:21:55,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:21:55,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:55,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:21:55,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:21:55,359 INFO L87 Difference]: Start difference. First operand 8525 states and 15974 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:57,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:57,626 INFO L93 Difference]: Finished difference Result 62283 states and 116983 transitions. [2021-11-07 02:21:57,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:21:57,626 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 02:21:57,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:57,755 INFO L225 Difference]: With dead ends: 62283 [2021-11-07 02:21:57,755 INFO L226 Difference]: Without dead ends: 53797 [2021-11-07 02:21:57,776 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:21:57,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53797 states. [2021-11-07 02:21:58,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53797 to 16094. [2021-11-07 02:21:58,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16094 states, 16089 states have (on average 1.875691466219156) internal successors, (30178), 16093 states have internal predecessors, (30178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:59,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16094 states to 16094 states and 30178 transitions. [2021-11-07 02:21:59,025 INFO L78 Accepts]: Start accepts. Automaton has 16094 states and 30178 transitions. Word has length 58 [2021-11-07 02:21:59,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:59,025 INFO L470 AbstractCegarLoop]: Abstraction has 16094 states and 30178 transitions. [2021-11-07 02:21:59,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:59,026 INFO L276 IsEmpty]: Start isEmpty. Operand 16094 states and 30178 transitions. [2021-11-07 02:21:59,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 02:21:59,028 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:59,028 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:21:59,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:59,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:59,243 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:21:59,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:59,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1392965660, now seen corresponding path program 1 times [2021-11-07 02:21:59,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:59,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [332827915] [2021-11-07 02:21:59,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:59,245 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:59,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:59,247 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:59,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:21:59,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:59,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:21:59,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:59,968 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 02:21:59,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:00,127 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 02:22:00,127 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:00,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [332827915] [2021-11-07 02:22:00,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [332827915] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:00,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:00,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:22:00,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836979367] [2021-11-07 02:22:00,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:22:00,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:00,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:22:00,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:00,129 INFO L87 Difference]: Start difference. First operand 16094 states and 30178 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:01,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:01,957 INFO L93 Difference]: Finished difference Result 58531 states and 109973 transitions. [2021-11-07 02:22:01,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:22:01,958 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 02:22:01,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:02,036 INFO L225 Difference]: With dead ends: 58531 [2021-11-07 02:22:02,036 INFO L226 Difference]: Without dead ends: 46911 [2021-11-07 02:22:02,055 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:22:02,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46911 states. [2021-11-07 02:22:03,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46911 to 27157. [2021-11-07 02:22:03,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27157 states, 27152 states have (on average 1.8775044195639363) internal successors, (50978), 27156 states have internal predecessors, (50978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:03,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27157 states to 27157 states and 50978 transitions. [2021-11-07 02:22:03,610 INFO L78 Accepts]: Start accepts. Automaton has 27157 states and 50978 transitions. Word has length 58 [2021-11-07 02:22:03,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:03,611 INFO L470 AbstractCegarLoop]: Abstraction has 27157 states and 50978 transitions. [2021-11-07 02:22:03,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:03,611 INFO L276 IsEmpty]: Start isEmpty. Operand 27157 states and 50978 transitions. [2021-11-07 02:22:03,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 02:22:03,614 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:03,614 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:03,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:03,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:03,830 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:22:03,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:03,831 INFO L85 PathProgramCache]: Analyzing trace with hash 174664870, now seen corresponding path program 1 times [2021-11-07 02:22:03,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:03,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2097035307] [2021-11-07 02:22:03,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:03,832 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:03,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:03,833 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:03,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:22:04,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:04,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:22:04,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:04,627 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 02:22:04,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:04,901 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 02:22:04,901 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:04,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2097035307] [2021-11-07 02:22:04,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2097035307] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:04,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:04,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:22:04,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991286791] [2021-11-07 02:22:04,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:22:04,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:04,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:22:04,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:22:04,905 INFO L87 Difference]: Start difference. First operand 27157 states and 50978 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:13,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:13,038 INFO L93 Difference]: Finished difference Result 171319 states and 322317 transitions. [2021-11-07 02:22:13,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:22:13,039 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 02:22:13,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:13,338 INFO L225 Difference]: With dead ends: 171319 [2021-11-07 02:22:13,338 INFO L226 Difference]: Without dead ends: 148636 [2021-11-07 02:22:13,379 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:22:13,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148636 states. [2021-11-07 02:22:16,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148636 to 47111. [2021-11-07 02:22:16,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47111 states, 47106 states have (on average 1.8793784231308113) internal successors, (88530), 47110 states have internal predecessors, (88530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:16,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47111 states to 47111 states and 88530 transitions. [2021-11-07 02:22:16,553 INFO L78 Accepts]: Start accepts. Automaton has 47111 states and 88530 transitions. Word has length 60 [2021-11-07 02:22:16,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:16,553 INFO L470 AbstractCegarLoop]: Abstraction has 47111 states and 88530 transitions. [2021-11-07 02:22:16,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:16,553 INFO L276 IsEmpty]: Start isEmpty. Operand 47111 states and 88530 transitions. [2021-11-07 02:22:16,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 02:22:16,557 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:16,557 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 02:22:16,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:16,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:16,762 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:22:16,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:16,762 INFO L85 PathProgramCache]: Analyzing trace with hash 756564839, now seen corresponding path program 1 times [2021-11-07 02:22:16,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:16,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2033783310] [2021-11-07 02:22:16,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:16,763 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:16,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:16,765 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:16,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:22:17,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:17,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:22:17,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:17,502 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 02:22:17,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:17,620 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 02:22:17,620 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:17,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2033783310] [2021-11-07 02:22:17,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2033783310] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:17,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:17,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:22:17,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048214403] [2021-11-07 02:22:17,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:22:17,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:17,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:22:17,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:17,621 INFO L87 Difference]: Start difference. First operand 47111 states and 88530 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 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 02:22:21,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:21,817 INFO L93 Difference]: Finished difference Result 116423 states and 218165 transitions. [2021-11-07 02:22:21,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:22:21,817 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 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 67 [2021-11-07 02:22:21,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:21,922 INFO L225 Difference]: With dead ends: 116423 [2021-11-07 02:22:21,922 INFO L226 Difference]: Without dead ends: 71146 [2021-11-07 02:22:21,951 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 130 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 02:22:22,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71146 states. [2021-11-07 02:22:24,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71146 to 46871. [2021-11-07 02:22:24,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46871 states, 46866 states have (on average 1.8703110997311483) internal successors, (87654), 46870 states have internal predecessors, (87654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:24,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46871 states to 46871 states and 87654 transitions. [2021-11-07 02:22:24,331 INFO L78 Accepts]: Start accepts. Automaton has 46871 states and 87654 transitions. Word has length 67 [2021-11-07 02:22:24,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:24,331 INFO L470 AbstractCegarLoop]: Abstraction has 46871 states and 87654 transitions. [2021-11-07 02:22:24,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 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 02:22:24,331 INFO L276 IsEmpty]: Start isEmpty. Operand 46871 states and 87654 transitions. [2021-11-07 02:22:24,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 02:22:24,333 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:24,333 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 02:22:24,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:24,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:24,535 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:22:24,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:24,535 INFO L85 PathProgramCache]: Analyzing trace with hash 834275882, now seen corresponding path program 1 times [2021-11-07 02:22:24,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:24,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [960758363] [2021-11-07 02:22:24,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:24,536 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:24,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:24,538 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:24,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:22:25,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:25,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:22:25,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:25,212 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 02:22:25,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:25,363 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 02:22:25,363 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:25,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [960758363] [2021-11-07 02:22:25,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [960758363] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:25,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:25,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:22:25,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619805999] [2021-11-07 02:22:25,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:22:25,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:25,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:22:25,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:25,365 INFO L87 Difference]: Start difference. First operand 46871 states and 87654 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:27,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:27,565 INFO L93 Difference]: Finished difference Result 89415 states and 167186 transitions. [2021-11-07 02:22:27,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:22:27,566 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 02:22:27,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:27,616 INFO L225 Difference]: With dead ends: 89415 [2021-11-07 02:22:27,616 INFO L226 Difference]: Without dead ends: 46886 [2021-11-07 02:22:27,637 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 130 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 02:22:27,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46886 states. [2021-11-07 02:22:29,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46886 to 46871. [2021-11-07 02:22:29,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46871 states, 46866 states have (on average 1.8647633678999702) internal successors, (87394), 46870 states have internal predecessors, (87394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:29,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46871 states to 46871 states and 87394 transitions. [2021-11-07 02:22:29,666 INFO L78 Accepts]: Start accepts. Automaton has 46871 states and 87394 transitions. Word has length 67 [2021-11-07 02:22:29,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:29,666 INFO L470 AbstractCegarLoop]: Abstraction has 46871 states and 87394 transitions. [2021-11-07 02:22:29,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:29,667 INFO L276 IsEmpty]: Start isEmpty. Operand 46871 states and 87394 transitions. [2021-11-07 02:22:29,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 02:22:29,669 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:29,669 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 02:22:29,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:29,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:29,870 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:22:29,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:29,870 INFO L85 PathProgramCache]: Analyzing trace with hash 66754689, now seen corresponding path program 1 times [2021-11-07 02:22:29,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:29,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [138167010] [2021-11-07 02:22:29,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:29,871 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:29,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:29,871 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:29,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a11d55db-f22c-4fdc-9749-1ad7ca9a5a22/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:22:30,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:30,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:22:30,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:30,732 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 02:22:30,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:30,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:30,942 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:30,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [138167010] [2021-11-07 02:22:30,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [138167010] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:30,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:30,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:22:30,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314565851] [2021-11-07 02:22:30,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:22:30,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:30,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:22:30,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:22:30,943 INFO L87 Difference]: Start difference. First operand 46871 states and 87394 transitions. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 5 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)