./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec4_product27.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/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_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec4_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/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_0405f270-07ca-4ccc-96a8-53c54e9b573a/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 4373ae32f100aa418b32a7018bfdec5c3f7ae719a7f9b296410b14fba54a4baf --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:58:31,044 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:58:31,047 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:58:31,084 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:58:31,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:58:31,106 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:58:31,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:58:31,111 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:58:31,114 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:58:31,116 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:58:31,117 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:58:31,119 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:58:31,120 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:58:31,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:58:31,123 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:58:31,125 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:58:31,126 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:58:31,128 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:58:31,130 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:58:31,133 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:58:31,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:58:31,137 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:58:31,139 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:58:31,140 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:58:31,145 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:58:31,145 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:58:31,146 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:58:31,147 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:58:31,148 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:58:31,149 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:58:31,150 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:58:31,151 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:58:31,152 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:58:31,153 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:58:31,155 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:58:31,155 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:58:31,156 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:58:31,157 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:58:31,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:58:31,158 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:58:31,159 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:58:31,160 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:58:31,191 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:58:31,191 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:58:31,192 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:58:31,192 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:58:31,193 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:58:31,193 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:58:31,193 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:58:31,193 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:58:31,194 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:58:31,194 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:58:31,194 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:58:31,194 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:58:31,195 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:58:31,195 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:58:31,195 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:58:31,196 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:58:31,196 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:58:31,197 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:58:31,197 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:58:31,197 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:58:31,197 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:58:31,198 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:58:31,198 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:58:31,198 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:58:31,198 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:58:31,199 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:58:31,199 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:58:31,199 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:58:31,199 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:58:31,200 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:58:31,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:58:31,200 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:58:31,201 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:58:31,201 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:58:31,201 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:58:31,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:58:31,202 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:58:31,202 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:58:31,202 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:58:31,202 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_0405f270-07ca-4ccc-96a8-53c54e9b573a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4373ae32f100aa418b32a7018bfdec5c3f7ae719a7f9b296410b14fba54a4baf [2021-11-07 01:58:31,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:58:31,465 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:58:31,468 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:58:31,469 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:58:31,470 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:58:31,471 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec4_product27.cil.c [2021-11-07 01:58:31,553 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/data/c23fde5bf/eed1193ceec84fcea674343045fbd4fb/FLAGca59b983e [2021-11-07 01:58:32,170 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:58:32,171 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/sv-benchmarks/c/product-lines/email_spec4_product27.cil.c [2021-11-07 01:58:32,211 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/data/c23fde5bf/eed1193ceec84fcea674343045fbd4fb/FLAGca59b983e [2021-11-07 01:58:32,385 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/data/c23fde5bf/eed1193ceec84fcea674343045fbd4fb [2021-11-07 01:58:32,387 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:58:32,389 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:58:32,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:58:32,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:58:32,406 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:58:32,407 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:58:32" (1/1) ... [2021-11-07 01:58:32,408 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63c78729 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:32, skipping insertion in model container [2021-11-07 01:58:32,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:58:32" (1/1) ... [2021-11-07 01:58:32,416 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:58:32,507 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:58:32,690 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_0405f270-07ca-4ccc-96a8-53c54e9b573a/sv-benchmarks/c/product-lines/email_spec4_product27.cil.c[1542,1555] [2021-11-07 01:58:33,181 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:58:33,195 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:58:33,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6d2d0d9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:33, skipping insertion in model container [2021-11-07 01:58:33,196 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:58:33,196 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:58:33,199 INFO L168 Benchmark]: Toolchain (without parser) took 808.15 ms. Allocated memory was 117.4 MB in the beginning and 169.9 MB in the end (delta: 52.4 MB). Free memory was 85.9 MB in the beginning and 131.0 MB in the end (delta: -45.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:58:33,200 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 117.4 MB. Free memory was 74.6 MB in the beginning and 74.5 MB in the end (delta: 53.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:58:33,201 INFO L168 Benchmark]: CACSL2BoogieTranslator took 805.87 ms. Allocated memory was 117.4 MB in the beginning and 169.9 MB in the end (delta: 52.4 MB). Free memory was 85.7 MB in the beginning and 131.0 MB in the end (delta: -45.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:58:33,204 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 117.4 MB. Free memory was 74.6 MB in the beginning and 74.5 MB in the end (delta: 53.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 805.87 ms. Allocated memory was 117.4 MB in the beginning and 169.9 MB in the end (delta: 52.4 MB). Free memory was 85.7 MB in the beginning and 131.0 MB in the end (delta: -45.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1977]: 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_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/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_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec4_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/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_0405f270-07ca-4ccc-96a8-53c54e9b573a/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 4373ae32f100aa418b32a7018bfdec5c3f7ae719a7f9b296410b14fba54a4baf --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:58:35,856 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:58:35,860 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:58:35,918 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:58:35,919 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:58:35,929 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:58:35,931 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:58:35,936 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:58:35,940 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:58:35,952 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:58:35,954 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:58:35,956 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:58:35,957 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:58:35,960 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:58:35,963 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:58:35,969 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:58:35,971 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:58:35,973 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:58:35,975 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:58:35,985 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:58:35,988 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:58:35,990 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:58:35,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:58:35,994 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:58:35,998 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:58:35,999 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:58:35,999 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:58:36,001 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:58:36,001 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:58:36,003 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:58:36,003 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:58:36,004 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:58:36,006 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:58:36,007 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:58:36,008 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:58:36,008 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:58:36,009 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:58:36,010 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:58:36,010 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:58:36,011 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:58:36,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:58:36,013 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:58:36,044 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:58:36,045 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:58:36,046 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:58:36,046 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:58:36,047 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:58:36,047 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:58:36,047 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:58:36,047 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:58:36,048 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:58:36,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:58:36,050 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:58:36,051 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:58:36,051 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:58:36,051 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:58:36,051 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:58:36,052 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:58:36,052 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:58:36,052 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:58:36,052 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:58:36,052 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:58:36,053 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:58:36,053 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:58:36,053 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:58:36,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:58:36,053 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:58:36,054 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:58:36,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:58:36,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:58:36,054 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:58:36,055 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:58:36,055 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:58:36,055 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:58:36,055 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:58:36,055 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:58:36,056 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:58:36,056 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_0405f270-07ca-4ccc-96a8-53c54e9b573a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4373ae32f100aa418b32a7018bfdec5c3f7ae719a7f9b296410b14fba54a4baf [2021-11-07 01:58:36,486 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:58:36,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:58:36,524 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:58:36,526 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:58:36,527 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:58:36,528 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec4_product27.cil.c [2021-11-07 01:58:36,601 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/data/61959f835/dfc55f910063403c8cc398f5d5b2fab1/FLAG13111b64d [2021-11-07 01:58:37,384 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:58:37,385 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/sv-benchmarks/c/product-lines/email_spec4_product27.cil.c [2021-11-07 01:58:37,419 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/data/61959f835/dfc55f910063403c8cc398f5d5b2fab1/FLAG13111b64d [2021-11-07 01:58:37,540 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/data/61959f835/dfc55f910063403c8cc398f5d5b2fab1 [2021-11-07 01:58:37,550 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:58:37,552 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:58:37,554 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:58:37,554 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:58:37,558 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:58:37,559 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:58:37" (1/1) ... [2021-11-07 01:58:37,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@481b2f28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:37, skipping insertion in model container [2021-11-07 01:58:37,562 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:58:37" (1/1) ... [2021-11-07 01:58:37,570 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:58:37,664 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:58:37,894 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_0405f270-07ca-4ccc-96a8-53c54e9b573a/sv-benchmarks/c/product-lines/email_spec4_product27.cil.c[1542,1555] [2021-11-07 01:58:38,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:58:38,346 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:58:38,386 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:58:38,390 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/sv-benchmarks/c/product-lines/email_spec4_product27.cil.c[1542,1555] [2021-11-07 01:58:38,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:58:38,553 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:58:38,568 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_0405f270-07ca-4ccc-96a8-53c54e9b573a/sv-benchmarks/c/product-lines/email_spec4_product27.cil.c[1542,1555] [2021-11-07 01:58:38,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:58:38,699 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:58:38,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:38 WrapperNode [2021-11-07 01:58:38,700 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:58:38,701 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:58:38,702 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:58:38,702 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:58:38,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:38" (1/1) ... [2021-11-07 01:58:38,795 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:38" (1/1) ... [2021-11-07 01:58:38,998 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:58:38,999 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:58:38,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:58:38,999 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:58:39,009 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:38" (1/1) ... [2021-11-07 01:58:39,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:38" (1/1) ... [2021-11-07 01:58:39,037 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:38" (1/1) ... [2021-11-07 01:58:39,041 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:38" (1/1) ... [2021-11-07 01:58:39,124 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:38" (1/1) ... [2021-11-07 01:58:39,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:38" (1/1) ... [2021-11-07 01:58:39,180 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:38" (1/1) ... [2021-11-07 01:58:39,214 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:58:39,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:58:39,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:58:39,250 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:58:39,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:38" (1/1) ... [2021-11-07 01:58:39,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:58:39,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:58:39,291 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:58:39,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:58:39,331 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:58:39,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:58:39,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:58:39,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:58:39,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:58:45,732 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:58:45,732 INFO L299 CfgBuilder]: Removed 697 assume(true) statements. [2021-11-07 01:58:45,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:58:45 BoogieIcfgContainer [2021-11-07 01:58:45,737 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:58:45,740 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:58:45,740 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:58:45,744 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:58:45,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:58:37" (1/3) ... [2021-11-07 01:58:45,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26c19000 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:58:45, skipping insertion in model container [2021-11-07 01:58:45,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:38" (2/3) ... [2021-11-07 01:58:45,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26c19000 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:58:45, skipping insertion in model container [2021-11-07 01:58:45,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:58:45" (3/3) ... [2021-11-07 01:58:45,748 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec4_product27.cil.c [2021-11-07 01:58:45,754 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:58:45,754 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:58:45,817 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:58:45,831 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:58:45,831 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:58:45,892 INFO L276 IsEmpty]: Start isEmpty. Operand has 988 states, 981 states have (on average 1.72782874617737) internal successors, (1695), 987 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:45,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 01:58:45,906 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:45,907 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] [2021-11-07 01:58:45,908 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:58:45,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:45,914 INFO L85 PathProgramCache]: Analyzing trace with hash -55816793, now seen corresponding path program 1 times [2021-11-07 01:58:45,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:45,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [603042398] [2021-11-07 01:58:45,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:45,934 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:45,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:45,938 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:45,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:58:46,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:46,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:58:46,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:46,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:46,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:46,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:46,819 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:46,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [603042398] [2021-11-07 01:58:46,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [603042398] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:46,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:58:46,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:58:46,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118230595] [2021-11-07 01:58:46,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:58:46,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:46,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:58:46,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:58:46,866 INFO L87 Difference]: Start difference. First operand has 988 states, 981 states have (on average 1.72782874617737) internal successors, (1695), 987 states have internal predecessors, (1695), 0 states have call successors, (0), 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 21.5) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:47,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:47,081 INFO L93 Difference]: Finished difference Result 1687 states and 2860 transitions. [2021-11-07 01:58:47,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:58:47,082 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-11-07 01:58:47,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:47,108 INFO L225 Difference]: With dead ends: 1687 [2021-11-07 01:58:47,108 INFO L226 Difference]: Without dead ends: 828 [2021-11-07 01:58:47,117 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:58:47,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-11-07 01:58:47,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2021-11-07 01:58:47,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 822 states have (on average 1.7274939172749393) internal successors, (1420), 827 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:47,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1420 transitions. [2021-11-07 01:58:47,248 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1420 transitions. Word has length 43 [2021-11-07 01:58:47,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:47,249 INFO L470 AbstractCegarLoop]: Abstraction has 828 states and 1420 transitions. [2021-11-07 01:58:47,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:47,250 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1420 transitions. [2021-11-07 01:58:47,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 01:58:47,255 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:47,255 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:58:47,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 01:58:47,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:47,473 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:58:47,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:47,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1409544284, now seen corresponding path program 1 times [2021-11-07 01:58:47,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:47,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1724436397] [2021-11-07 01:58:47,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:47,475 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:47,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:47,477 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:47,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:58:47,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:47,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:58:47,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:48,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:48,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:48,260 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 01:58:48,260 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:48,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1724436397] [2021-11-07 01:58:48,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1724436397] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:48,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:58:48,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:58:48,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460973782] [2021-11-07 01:58:48,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:58:48,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:48,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:58:48,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:58:48,266 INFO L87 Difference]: Start difference. First operand 828 states and 1420 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:48,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:48,449 INFO L93 Difference]: Finished difference Result 2454 states and 4212 transitions. [2021-11-07 01:58:48,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:58:48,449 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 01:58:48,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:48,464 INFO L225 Difference]: With dead ends: 2454 [2021-11-07 01:58:48,464 INFO L226 Difference]: Without dead ends: 1641 [2021-11-07 01:58:48,467 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:58:48,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2021-11-07 01:58:48,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 827. [2021-11-07 01:58:48,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 821 states have (on average 1.7235079171741778) internal successors, (1415), 826 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:48,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1415 transitions. [2021-11-07 01:58:48,531 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1415 transitions. Word has length 44 [2021-11-07 01:58:48,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:48,532 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1415 transitions. [2021-11-07 01:58:48,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:48,532 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1415 transitions. [2021-11-07 01:58:48,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 01:58:48,547 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:48,547 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:58:48,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:48,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:48,748 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:58:48,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:48,749 INFO L85 PathProgramCache]: Analyzing trace with hash 198067510, now seen corresponding path program 1 times [2021-11-07 01:58:48,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:48,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1833803134] [2021-11-07 01:58:48,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:48,751 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:48,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:48,754 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:48,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:58:49,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:49,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:58:49,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:49,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:49,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:49,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:49,527 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:49,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1833803134] [2021-11-07 01:58:49,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1833803134] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:49,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:58:49,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:58:49,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785396262] [2021-11-07 01:58:49,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:58:49,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:49,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:58:49,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:58:49,535 INFO L87 Difference]: Start difference. First operand 827 states and 1415 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:49,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:49,933 INFO L93 Difference]: Finished difference Result 3225 states and 5522 transitions. [2021-11-07 01:58:49,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:58:49,934 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-07 01:58:49,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:49,953 INFO L225 Difference]: With dead ends: 3225 [2021-11-07 01:58:49,953 INFO L226 Difference]: Without dead ends: 2416 [2021-11-07 01:58:49,955 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:58:49,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-11-07 01:58:50,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 826. [2021-11-07 01:58:50,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 820 states have (on average 1.7207317073170731) internal successors, (1411), 825 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:50,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1411 transitions. [2021-11-07 01:58:50,039 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1411 transitions. Word has length 46 [2021-11-07 01:58:50,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:50,039 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 1411 transitions. [2021-11-07 01:58:50,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:50,040 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1411 transitions. [2021-11-07 01:58:50,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 01:58:50,042 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:50,042 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] [2021-11-07 01:58:50,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:50,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:50,257 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:58:50,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:50,258 INFO L85 PathProgramCache]: Analyzing trace with hash 307192259, now seen corresponding path program 1 times [2021-11-07 01:58:50,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:50,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1487255298] [2021-11-07 01:58:50,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:50,259 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:50,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:50,263 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:50,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:58:50,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:50,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:58:50,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:50,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:50,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:51,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:51,013 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:51,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1487255298] [2021-11-07 01:58:51,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1487255298] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:51,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:58:51,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:58:51,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303038228] [2021-11-07 01:58:51,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:58:51,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:51,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:58:51,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:58:51,017 INFO L87 Difference]: Start difference. First operand 826 states and 1411 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:51,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:51,147 INFO L93 Difference]: Finished difference Result 1649 states and 2819 transitions. [2021-11-07 01:58:51,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:58:51,148 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 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 47 [2021-11-07 01:58:51,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:51,154 INFO L225 Difference]: With dead ends: 1649 [2021-11-07 01:58:51,154 INFO L226 Difference]: Without dead ends: 831 [2021-11-07 01:58:51,156 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:58:51,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2021-11-07 01:58:51,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 826. [2021-11-07 01:58:51,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 820 states have (on average 1.7170731707317073) internal successors, (1408), 825 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:51,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1408 transitions. [2021-11-07 01:58:51,218 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1408 transitions. Word has length 47 [2021-11-07 01:58:51,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:51,218 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 1408 transitions. [2021-11-07 01:58:51,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:51,220 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1408 transitions. [2021-11-07 01:58:51,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:58:51,221 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:51,221 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:58:51,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:51,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:51,437 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:58:51,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:51,437 INFO L85 PathProgramCache]: Analyzing trace with hash 894540110, now seen corresponding path program 1 times [2021-11-07 01:58:51,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:51,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [186831309] [2021-11-07 01:58:51,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:51,438 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:51,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:51,439 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:51,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:58:51,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:51,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:58:51,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:52,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:52,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:52,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:52,179 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:52,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [186831309] [2021-11-07 01:58:52,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [186831309] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:52,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:58:52,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:58:52,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952315643] [2021-11-07 01:58:52,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:58:52,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:52,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:58:52,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:58:52,182 INFO L87 Difference]: Start difference. First operand 826 states and 1408 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:52,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:52,638 INFO L93 Difference]: Finished difference Result 3212 states and 5498 transitions. [2021-11-07 01:58:52,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:58:52,639 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 01:58:52,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:52,657 INFO L225 Difference]: With dead ends: 3212 [2021-11-07 01:58:52,657 INFO L226 Difference]: Without dead ends: 2412 [2021-11-07 01:58:52,659 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:58:52,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-11-07 01:58:52,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 826. [2021-11-07 01:58:52,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 820 states have (on average 1.7134146341463414) internal successors, (1405), 825 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:52,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1405 transitions. [2021-11-07 01:58:52,750 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1405 transitions. Word has length 48 [2021-11-07 01:58:52,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:52,750 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 1405 transitions. [2021-11-07 01:58:52,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:52,751 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1405 transitions. [2021-11-07 01:58:52,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 01:58:52,753 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:52,754 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:58:52,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:52,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:52,968 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:58:52,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:52,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1931962509, now seen corresponding path program 1 times [2021-11-07 01:58:52,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:52,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [343036682] [2021-11-07 01:58:52,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:52,970 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:52,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:52,971 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:52,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:58:53,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:53,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:58:53,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:53,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:53,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:53,706 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:53,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [343036682] [2021-11-07 01:58:53,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [343036682] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:53,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:58:53,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:58:53,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477514878] [2021-11-07 01:58:53,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:58:53,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:53,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:58:53,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:58:53,709 INFO L87 Difference]: Start difference. First operand 826 states and 1405 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:53,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:53,872 INFO L93 Difference]: Finished difference Result 2165 states and 3673 transitions. [2021-11-07 01:58:53,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:58:53,872 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-07 01:58:53,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:53,884 INFO L225 Difference]: With dead ends: 2165 [2021-11-07 01:58:53,884 INFO L226 Difference]: Without dead ends: 1626 [2021-11-07 01:58:53,885 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:58:53,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2021-11-07 01:58:53,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 1087. [2021-11-07 01:58:53,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1081 states have (on average 1.7437557816836262) internal successors, (1885), 1086 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:53,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 1885 transitions. [2021-11-07 01:58:53,984 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 1885 transitions. Word has length 50 [2021-11-07 01:58:53,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:53,985 INFO L470 AbstractCegarLoop]: Abstraction has 1087 states and 1885 transitions. [2021-11-07 01:58:53,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:53,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 1885 transitions. [2021-11-07 01:58:53,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:58:53,988 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:53,988 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:58:54,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:54,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:54,204 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:58:54,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:54,205 INFO L85 PathProgramCache]: Analyzing trace with hash -806506846, now seen corresponding path program 1 times [2021-11-07 01:58:54,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:54,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721715432] [2021-11-07 01:58:54,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:54,206 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:54,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:54,207 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:54,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:58:54,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:54,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:58:54,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:54,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:54,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:55,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:55,016 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:55,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721715432] [2021-11-07 01:58:55,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721715432] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:55,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:58:55,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:58:55,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084848318] [2021-11-07 01:58:55,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:58:55,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:55,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:58:55,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:58:55,018 INFO L87 Difference]: Start difference. First operand 1087 states and 1885 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:55,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:55,164 INFO L93 Difference]: Finished difference Result 2838 states and 4914 transitions. [2021-11-07 01:58:55,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:58:55,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 01:58:55,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:55,176 INFO L225 Difference]: With dead ends: 2838 [2021-11-07 01:58:55,177 INFO L226 Difference]: Without dead ends: 1835 [2021-11-07 01:58:55,179 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:58:55,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1835 states. [2021-11-07 01:58:55,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1835 to 1296. [2021-11-07 01:58:55,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1290 states have (on average 1.758139534883721) internal successors, (2268), 1295 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:55,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 2268 transitions. [2021-11-07 01:58:55,313 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 2268 transitions. Word has length 62 [2021-11-07 01:58:55,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:55,314 INFO L470 AbstractCegarLoop]: Abstraction has 1296 states and 2268 transitions. [2021-11-07 01:58:55,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:55,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 2268 transitions. [2021-11-07 01:58:55,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:58:55,316 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:55,317 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:58:55,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:55,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:55,532 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:58:55,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:55,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1821842147, now seen corresponding path program 1 times [2021-11-07 01:58:55,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:55,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857215246] [2021-11-07 01:58:55,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:55,533 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:55,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:55,535 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:55,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:58:56,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:56,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:58:56,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:56,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:56,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:56,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:56,404 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:56,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857215246] [2021-11-07 01:58:56,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857215246] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:56,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:58:56,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:58:56,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807082318] [2021-11-07 01:58:56,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:58:56,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:56,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:58:56,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:58:56,407 INFO L87 Difference]: Start difference. First operand 1296 states and 2268 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:56,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:56,634 INFO L93 Difference]: Finished difference Result 3497 states and 6128 transitions. [2021-11-07 01:58:56,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:58:56,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 01:58:56,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:56,651 INFO L225 Difference]: With dead ends: 3497 [2021-11-07 01:58:56,651 INFO L226 Difference]: Without dead ends: 2293 [2021-11-07 01:58:56,655 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:58:56,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2021-11-07 01:58:56,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 1754. [2021-11-07 01:58:56,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1754 states, 1748 states have (on average 1.7791762013729977) internal successors, (3110), 1753 states have internal predecessors, (3110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:56,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1754 states to 1754 states and 3110 transitions. [2021-11-07 01:58:56,818 INFO L78 Accepts]: Start accepts. Automaton has 1754 states and 3110 transitions. Word has length 63 [2021-11-07 01:58:56,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:56,819 INFO L470 AbstractCegarLoop]: Abstraction has 1754 states and 3110 transitions. [2021-11-07 01:58:56,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:56,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1754 states and 3110 transitions. [2021-11-07 01:58:56,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:58:56,822 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:56,823 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:58:56,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-07 01:58:57,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:57,039 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:58:57,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:57,040 INFO L85 PathProgramCache]: Analyzing trace with hash 451396788, now seen corresponding path program 1 times [2021-11-07 01:58:57,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:57,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1344462543] [2021-11-07 01:58:57,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:57,041 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:57,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:57,042 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:57,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:58:57,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:57,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:58:57,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:57,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:57,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:57,968 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 01:58:57,968 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:57,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1344462543] [2021-11-07 01:58:57,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1344462543] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:57,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:58:57,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:58:57,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865095287] [2021-11-07 01:58:57,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:58:57,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:57,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:58:57,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:58:57,970 INFO L87 Difference]: Start difference. First operand 1754 states and 3110 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:58,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:58,208 INFO L93 Difference]: Finished difference Result 4851 states and 8623 transitions. [2021-11-07 01:58:58,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:58:58,208 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 01:58:58,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:58,230 INFO L225 Difference]: With dead ends: 4851 [2021-11-07 01:58:58,230 INFO L226 Difference]: Without dead ends: 3197 [2021-11-07 01:58:58,233 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:58:58,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3197 states. [2021-11-07 01:58:58,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3197 to 2658. [2021-11-07 01:58:58,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2658 states, 2652 states have (on average 1.7997737556561086) internal successors, (4773), 2657 states have internal predecessors, (4773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:58,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2658 states to 2658 states and 4773 transitions. [2021-11-07 01:58:58,439 INFO L78 Accepts]: Start accepts. Automaton has 2658 states and 4773 transitions. Word has length 64 [2021-11-07 01:58:58,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:58:58,440 INFO L470 AbstractCegarLoop]: Abstraction has 2658 states and 4773 transitions. [2021-11-07 01:58:58,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:58,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2658 states and 4773 transitions. [2021-11-07 01:58:58,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:58:58,444 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:58:58,444 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:58:58,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:58:58,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:58:58,661 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:58:58,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:58:58,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1105180468, now seen corresponding path program 1 times [2021-11-07 01:58:58,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:58:58,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [369526763] [2021-11-07 01:58:58,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:58:58,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:58:58,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:58:58,663 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:58:58,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:58:59,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:59,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:58:59,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:59,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:58:59,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:58:59,543 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 01:58:59,544 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:58:59,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [369526763] [2021-11-07 01:58:59,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [369526763] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:58:59,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:58:59,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:58:59,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305569326] [2021-11-07 01:58:59,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:58:59,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:58:59,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:58:59,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:58:59,546 INFO L87 Difference]: Start difference. First operand 2658 states and 4773 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:58:59,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:58:59,874 INFO L93 Difference]: Finished difference Result 7299 states and 13131 transitions. [2021-11-07 01:58:59,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:58:59,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 01:58:59,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:58:59,910 INFO L225 Difference]: With dead ends: 7299 [2021-11-07 01:58:59,910 INFO L226 Difference]: Without dead ends: 4775 [2021-11-07 01:58:59,916 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:58:59,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4775 states. [2021-11-07 01:59:00,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4775 to 4236. [2021-11-07 01:59:00,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4236 states, 4230 states have (on average 1.8141843971631206) internal successors, (7674), 4235 states have internal predecessors, (7674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:00,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4236 states to 4236 states and 7674 transitions. [2021-11-07 01:59:00,227 INFO L78 Accepts]: Start accepts. Automaton has 4236 states and 7674 transitions. Word has length 65 [2021-11-07 01:59:00,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:00,227 INFO L470 AbstractCegarLoop]: Abstraction has 4236 states and 7674 transitions. [2021-11-07 01:59:00,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:00,227 INFO L276 IsEmpty]: Start isEmpty. Operand 4236 states and 7674 transitions. [2021-11-07 01:59:00,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:59:00,239 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:00,239 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:00,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:00,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:00,454 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:59:00,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:00,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1150625891, now seen corresponding path program 1 times [2021-11-07 01:59:00,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:00,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769031923] [2021-11-07 01:59:00,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:00,455 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:00,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:00,456 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:00,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:59:00,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:00,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:59:00,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:01,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:01,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:01,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:01,305 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:01,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769031923] [2021-11-07 01:59:01,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769031923] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:01,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:01,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:59:01,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844661671] [2021-11-07 01:59:01,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:59:01,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:01,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:59:01,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:59:01,307 INFO L87 Difference]: Start difference. First operand 4236 states and 7674 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:01,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:01,721 INFO L93 Difference]: Finished difference Result 11749 states and 21317 transitions. [2021-11-07 01:59:01,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:59:01,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 01:59:01,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:01,758 INFO L225 Difference]: With dead ends: 11749 [2021-11-07 01:59:01,758 INFO L226 Difference]: Without dead ends: 7681 [2021-11-07 01:59:01,764 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:59:01,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7681 states. [2021-11-07 01:59:02,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7681 to 7142. [2021-11-07 01:59:02,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7142 states, 7136 states have (on average 1.8232903587443947) internal successors, (13011), 7141 states have internal predecessors, (13011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:02,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7142 states to 7142 states and 13011 transitions. [2021-11-07 01:59:02,323 INFO L78 Accepts]: Start accepts. Automaton has 7142 states and 13011 transitions. Word has length 66 [2021-11-07 01:59:02,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:02,324 INFO L470 AbstractCegarLoop]: Abstraction has 7142 states and 13011 transitions. [2021-11-07 01:59:02,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:02,325 INFO L276 IsEmpty]: Start isEmpty. Operand 7142 states and 13011 transitions. [2021-11-07 01:59:02,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:59:02,334 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:02,334 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:02,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:02,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:02,548 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:59:02,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:02,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1226088451, now seen corresponding path program 1 times [2021-11-07 01:59:02,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:02,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1809155350] [2021-11-07 01:59:02,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:02,549 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:02,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:02,550 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:02,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:59:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:03,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:59:03,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:03,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:03,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:03,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:03,461 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:03,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1809155350] [2021-11-07 01:59:03,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1809155350] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:03,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:03,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:59:03,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256667513] [2021-11-07 01:59:03,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:59:03,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:03,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:59:03,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:59:03,464 INFO L87 Difference]: Start difference. First operand 7142 states and 13011 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:04,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:04,074 INFO L93 Difference]: Finished difference Result 20793 states and 37939 transitions. [2021-11-07 01:59:04,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:59:04,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 01:59:04,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:04,179 INFO L225 Difference]: With dead ends: 20793 [2021-11-07 01:59:04,179 INFO L226 Difference]: Without dead ends: 13827 [2021-11-07 01:59:04,189 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:59:04,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13827 states. [2021-11-07 01:59:04,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13827 to 13288. [2021-11-07 01:59:04,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13288 states, 13282 states have (on average 1.8289414244842643) internal successors, (24292), 13287 states have internal predecessors, (24292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:05,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13288 states to 13288 states and 24292 transitions. [2021-11-07 01:59:05,004 INFO L78 Accepts]: Start accepts. Automaton has 13288 states and 24292 transitions. Word has length 67 [2021-11-07 01:59:05,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:05,004 INFO L470 AbstractCegarLoop]: Abstraction has 13288 states and 24292 transitions. [2021-11-07 01:59:05,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:05,005 INFO L276 IsEmpty]: Start isEmpty. Operand 13288 states and 24292 transitions. [2021-11-07 01:59:05,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:59:05,012 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:05,012 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:05,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:05,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:05,228 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:59:05,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:05,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1286184147, now seen corresponding path program 1 times [2021-11-07 01:59:05,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:05,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1405142104] [2021-11-07 01:59:05,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:05,229 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:05,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:05,230 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:05,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:59:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:05,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:59:05,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:05,991 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:59:05,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:59:06,174 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:06,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1405142104] [2021-11-07 01:59:06,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1405142104] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:06,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:06,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:59:06,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410488660] [2021-11-07 01:59:06,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:59:06,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:06,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:59:06,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:59:06,176 INFO L87 Difference]: Start difference. First operand 13288 states and 24292 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:09,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:09,533 INFO L93 Difference]: Finished difference Result 32961 states and 60241 transitions. [2021-11-07 01:59:09,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:59:09,533 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:59:09,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:09,596 INFO L225 Difference]: With dead ends: 32961 [2021-11-07 01:59:09,597 INFO L226 Difference]: Without dead ends: 19970 [2021-11-07 01:59:09,615 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:59:09,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19970 states. [2021-11-07 01:59:10,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19970 to 13255. [2021-11-07 01:59:10,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13255 states, 13249 states have (on average 1.8235338516114423) internal successors, (24160), 13254 states have internal predecessors, (24160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:10,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13255 states to 13255 states and 24160 transitions. [2021-11-07 01:59:10,391 INFO L78 Accepts]: Start accepts. Automaton has 13255 states and 24160 transitions. Word has length 68 [2021-11-07 01:59:10,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:10,392 INFO L470 AbstractCegarLoop]: Abstraction has 13255 states and 24160 transitions. [2021-11-07 01:59:10,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:10,392 INFO L276 IsEmpty]: Start isEmpty. Operand 13255 states and 24160 transitions. [2021-11-07 01:59:10,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:59:10,399 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:10,399 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:10,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:10,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:10,612 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:59:10,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:10,613 INFO L85 PathProgramCache]: Analyzing trace with hash -911097964, now seen corresponding path program 1 times [2021-11-07 01:59:10,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:10,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1499863604] [2021-11-07 01:59:10,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:10,613 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:10,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:10,614 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:10,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:59:11,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:11,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:59:11,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:11,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:11,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:11,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:11,584 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:11,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1499863604] [2021-11-07 01:59:11,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1499863604] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:11,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:11,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:59:11,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727936014] [2021-11-07 01:59:11,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:59:11,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:11,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:59:11,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:59:11,587 INFO L87 Difference]: Start difference. First operand 13255 states and 24160 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:12,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:12,565 INFO L93 Difference]: Finished difference Result 38964 states and 71093 transitions. [2021-11-07 01:59:12,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:59:12,566 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:59:12,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:12,624 INFO L225 Difference]: With dead ends: 38964 [2021-11-07 01:59:12,624 INFO L226 Difference]: Without dead ends: 25892 [2021-11-07 01:59:12,644 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:59:12,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25892 states. [2021-11-07 01:59:14,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25892 to 25353. [2021-11-07 01:59:14,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25353 states, 25347 states have (on average 1.8255809365999922) internal successors, (46273), 25352 states have internal predecessors, (46273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:14,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25353 states to 25353 states and 46273 transitions. [2021-11-07 01:59:14,372 INFO L78 Accepts]: Start accepts. Automaton has 25353 states and 46273 transitions. Word has length 68 [2021-11-07 01:59:14,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:14,372 INFO L470 AbstractCegarLoop]: Abstraction has 25353 states and 46273 transitions. [2021-11-07 01:59:14,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:14,372 INFO L276 IsEmpty]: Start isEmpty. Operand 25353 states and 46273 transitions. [2021-11-07 01:59:14,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:59:14,380 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:14,380 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:14,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:14,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:14,587 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:59:14,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:14,587 INFO L85 PathProgramCache]: Analyzing trace with hash 437171412, now seen corresponding path program 1 times [2021-11-07 01:59:14,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:14,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190964059] [2021-11-07 01:59:14,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:14,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:14,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:14,589 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:14,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:59:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:15,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:59:15,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:15,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:15,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:15,527 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:15,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1190964059] [2021-11-07 01:59:15,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1190964059] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:15,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:15,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:59:15,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254839951] [2021-11-07 01:59:15,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:59:15,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:15,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:59:15,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:59:15,529 INFO L87 Difference]: Start difference. First operand 25353 states and 46273 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:17,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:17,448 INFO L93 Difference]: Finished difference Result 69897 states and 127168 transitions. [2021-11-07 01:59:17,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:59:17,449 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:59:17,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:17,548 INFO L225 Difference]: With dead ends: 69897 [2021-11-07 01:59:17,548 INFO L226 Difference]: Without dead ends: 44774 [2021-11-07 01:59:17,580 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:59:17,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44774 states. [2021-11-07 01:59:20,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44774 to 44235. [2021-11-07 01:59:20,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44235 states, 44229 states have (on average 1.8146012797033622) internal successors, (80258), 44234 states have internal predecessors, (80258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:20,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44235 states to 44235 states and 80258 transitions. [2021-11-07 01:59:20,230 INFO L78 Accepts]: Start accepts. Automaton has 44235 states and 80258 transitions. Word has length 69 [2021-11-07 01:59:20,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:20,231 INFO L470 AbstractCegarLoop]: Abstraction has 44235 states and 80258 transitions. [2021-11-07 01:59:20,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:20,231 INFO L276 IsEmpty]: Start isEmpty. Operand 44235 states and 80258 transitions. [2021-11-07 01:59:20,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:59:20,239 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:20,239 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:20,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:20,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:20,452 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:59:20,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:20,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1777749171, now seen corresponding path program 1 times [2021-11-07 01:59:20,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:20,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [344963734] [2021-11-07 01:59:20,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:20,454 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:20,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:20,455 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:20,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:59:21,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:21,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:59:21,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:21,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:59:21,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:21,509 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:59:21,510 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:21,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [344963734] [2021-11-07 01:59:21,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [344963734] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:21,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:21,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:59:21,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566630279] [2021-11-07 01:59:21,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:59:21,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:21,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:59:21,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:59:21,512 INFO L87 Difference]: Start difference. First operand 44235 states and 80258 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:29,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:29,356 INFO L93 Difference]: Finished difference Result 172208 states and 312333 transitions. [2021-11-07 01:59:29,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:59:29,357 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 01:59:29,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:29,635 INFO L225 Difference]: With dead ends: 172208 [2021-11-07 01:59:29,636 INFO L226 Difference]: Without dead ends: 128269 [2021-11-07 01:59:29,692 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:59:29,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128269 states. [2021-11-07 01:59:33,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128269 to 43977. [2021-11-07 01:59:33,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43977 states, 43971 states have (on average 1.801778444884128) internal successors, (79226), 43976 states have internal predecessors, (79226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:33,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43977 states to 43977 states and 79226 transitions. [2021-11-07 01:59:33,535 INFO L78 Accepts]: Start accepts. Automaton has 43977 states and 79226 transitions. Word has length 70 [2021-11-07 01:59:33,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:33,536 INFO L470 AbstractCegarLoop]: Abstraction has 43977 states and 79226 transitions. [2021-11-07 01:59:33,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:33,536 INFO L276 IsEmpty]: Start isEmpty. Operand 43977 states and 79226 transitions. [2021-11-07 01:59:33,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:59:33,545 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:33,545 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:33,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:33,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:33,760 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:59:33,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:33,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1234119953, now seen corresponding path program 1 times [2021-11-07 01:59:33,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:33,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [180849880] [2021-11-07 01:59:33,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:33,761 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:33,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:33,762 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:33,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:59:34,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:34,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:59:34,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:34,602 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:34,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:34,761 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:34,761 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:34,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [180849880] [2021-11-07 01:59:34,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [180849880] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:34,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:34,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:59:34,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184088154] [2021-11-07 01:59:34,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:59:34,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:34,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:59:34,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:59:34,767 INFO L87 Difference]: Start difference. First operand 43977 states and 79226 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:37,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:37,167 INFO L93 Difference]: Finished difference Result 88191 states and 158836 transitions. [2021-11-07 01:59:37,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:59:37,167 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 01:59:37,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:37,234 INFO L225 Difference]: With dead ends: 88191 [2021-11-07 01:59:37,234 INFO L226 Difference]: Without dead ends: 44516 [2021-11-07 01:59:37,261 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:59:37,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44516 states. [2021-11-07 01:59:39,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44516 to 43977. [2021-11-07 01:59:39,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43977 states, 43971 states have (on average 1.7988674353551204) internal successors, (79098), 43976 states have internal predecessors, (79098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:39,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43977 states to 43977 states and 79098 transitions. [2021-11-07 01:59:39,613 INFO L78 Accepts]: Start accepts. Automaton has 43977 states and 79098 transitions. Word has length 70 [2021-11-07 01:59:39,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:39,613 INFO L470 AbstractCegarLoop]: Abstraction has 43977 states and 79098 transitions. [2021-11-07 01:59:39,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:39,614 INFO L276 IsEmpty]: Start isEmpty. Operand 43977 states and 79098 transitions. [2021-11-07 01:59:39,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:59:39,619 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:39,619 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:39,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:59:39,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:59:39,820 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:59:39,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:39,820 INFO L85 PathProgramCache]: Analyzing trace with hash 921654882, now seen corresponding path program 1 times [2021-11-07 01:59:39,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:59:39,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [280091887] [2021-11-07 01:59:39,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:39,821 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:59:39,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:59:39,822 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:59:39,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0405f270-07ca-4ccc-96a8-53c54e9b573a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:59:40,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:40,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:59:40,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:59:40,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:40,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:59:40,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:40,893 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:59:40,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [280091887] [2021-11-07 01:59:40,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [280091887] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:40,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:40,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:59:40,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175726976] [2021-11-07 01:59:40,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:59:40,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:59:40,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:59:40,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:59:40,897 INFO L87 Difference]: Start difference. First operand 43977 states and 79098 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:44,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:44,864 INFO L93 Difference]: Finished difference Result 123433 states and 221758 transitions. [2021-11-07 01:59:44,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:59:44,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 01:59:44,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:45,019 INFO L225 Difference]: With dead ends: 123433 [2021-11-07 01:59:45,019 INFO L226 Difference]: Without dead ends: 79718 [2021-11-07 01:59:45,053 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:59:45,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79718 states.