./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec8_product20.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_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/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_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec8_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/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_b02e90d0-4693-4428-962d-e5fc2f3efc9c/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 14180d3cb690799ed57b4096de70e545e9154e30692708de4df58b96eb76a2f0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:49:28,945 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:49:28,947 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:49:28,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:49:28,978 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:49:28,979 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:49:28,981 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:49:28,983 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:49:28,985 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:49:28,987 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:49:28,988 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:49:28,989 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:49:28,989 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:49:28,991 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:49:28,992 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:49:28,994 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:49:28,995 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:49:28,996 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:49:28,998 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:49:29,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:49:29,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:49:29,009 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:49:29,010 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:49:29,011 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:49:29,015 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:49:29,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:49:29,015 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:49:29,016 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:49:29,017 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:49:29,018 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:49:29,018 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:49:29,019 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:49:29,020 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:49:29,021 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:49:29,029 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:49:29,030 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:49:29,031 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:49:29,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:49:29,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:49:29,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:49:29,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:49:29,034 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:49:29,087 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:49:29,088 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:49:29,089 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:49:29,089 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:49:29,090 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:49:29,090 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:49:29,090 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:49:29,090 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:49:29,090 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:49:29,091 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:49:29,097 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:49:29,098 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:49:29,098 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:49:29,098 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:49:29,098 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:49:29,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:49:29,099 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:49:29,100 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:49:29,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:49:29,100 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:49:29,100 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:49:29,100 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:49:29,101 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:49:29,101 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:49:29,101 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:49:29,101 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:49:29,101 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:49:29,102 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:49:29,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:49:29,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:49:29,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:49:29,104 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:49:29,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:49:29,104 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:49:29,105 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:49:29,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:49:29,105 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:49:29,105 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:49:29,105 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:49:29,105 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_b02e90d0-4693-4428-962d-e5fc2f3efc9c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14180d3cb690799ed57b4096de70e545e9154e30692708de4df58b96eb76a2f0 [2021-11-07 01:49:29,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:49:29,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:49:29,381 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:49:29,382 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:49:29,383 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:49:29,384 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec8_product20.cil.c [2021-11-07 01:49:29,451 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/data/b0a8a146e/2a555d142d0f4a03b51f1e43ed99ca17/FLAG55f422e91 [2021-11-07 01:49:30,080 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:49:30,081 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/sv-benchmarks/c/product-lines/email_spec8_product20.cil.c [2021-11-07 01:49:30,112 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/data/b0a8a146e/2a555d142d0f4a03b51f1e43ed99ca17/FLAG55f422e91 [2021-11-07 01:49:30,346 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/data/b0a8a146e/2a555d142d0f4a03b51f1e43ed99ca17 [2021-11-07 01:49:30,349 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:49:30,350 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:49:30,352 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:49:30,352 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:49:30,355 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:49:30,356 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:49:30" (1/1) ... [2021-11-07 01:49:30,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ff649bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:30, skipping insertion in model container [2021-11-07 01:49:30,357 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:49:30" (1/1) ... [2021-11-07 01:49:30,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:49:30,423 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:49:30,837 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_b02e90d0-4693-4428-962d-e5fc2f3efc9c/sv-benchmarks/c/product-lines/email_spec8_product20.cil.c[19452,19465] [2021-11-07 01:49:31,082 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:49:31,102 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 01:49:31,103 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@622bcc36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:31, skipping insertion in model container [2021-11-07 01:49:31,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:49:31,103 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:49:31,105 INFO L168 Benchmark]: Toolchain (without parser) took 753.60 ms. Allocated memory is still 102.8 MB. Free memory was 69.1 MB in the beginning and 66.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:49:31,107 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 102.8 MB. Free memory is still 55.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:49:31,108 INFO L168 Benchmark]: CACSL2BoogieTranslator took 751.04 ms. Allocated memory is still 102.8 MB. Free memory was 68.9 MB in the beginning and 66.1 MB in the end (delta: 2.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:49:31,110 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 102.8 MB. Free memory is still 55.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 751.04 ms. Allocated memory is still 102.8 MB. Free memory was 68.9 MB in the beginning and 66.1 MB in the end (delta: 2.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 77]: 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_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/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_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec8_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/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_b02e90d0-4693-4428-962d-e5fc2f3efc9c/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 14180d3cb690799ed57b4096de70e545e9154e30692708de4df58b96eb76a2f0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:49:33,288 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:49:33,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:49:33,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:49:33,330 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:49:33,333 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:49:33,335 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:49:33,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:49:33,340 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:49:33,341 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:49:33,342 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:49:33,344 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:49:33,344 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:49:33,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:49:33,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:49:33,349 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:49:33,350 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:49:33,351 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:49:33,353 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:49:33,355 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:49:33,357 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:49:33,359 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:49:33,362 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:49:33,365 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:49:33,379 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:49:33,380 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:49:33,380 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:49:33,382 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:49:33,382 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:49:33,383 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:49:33,384 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:49:33,385 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:49:33,386 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:49:33,387 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:49:33,401 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:49:33,402 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:49:33,403 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:49:33,404 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:49:33,404 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:49:33,406 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:49:33,406 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:49:33,407 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:49:33,445 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:49:33,445 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:49:33,447 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:49:33,447 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:49:33,447 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:49:33,447 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:49:33,448 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:49:33,448 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:49:33,448 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:49:33,450 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:49:33,450 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:49:33,451 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:49:33,451 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:49:33,451 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:49:33,451 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:49:33,452 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:49:33,452 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:49:33,452 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:49:33,452 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:49:33,452 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:49:33,453 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:49:33,453 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:49:33,453 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:49:33,453 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:49:33,453 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:49:33,454 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:49:33,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:49:33,454 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:49:33,454 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:49:33,455 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:49:33,455 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:49:33,455 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:49:33,455 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:49:33,456 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:49:33,456 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:49:33,456 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_b02e90d0-4693-4428-962d-e5fc2f3efc9c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14180d3cb690799ed57b4096de70e545e9154e30692708de4df58b96eb76a2f0 [2021-11-07 01:49:33,816 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:49:33,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:49:33,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:49:33,848 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:49:33,849 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:49:33,850 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec8_product20.cil.c [2021-11-07 01:49:33,912 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/data/ee4d739fa/48de43fa30a04be481d36056ee4dd827/FLAG1a3b383de [2021-11-07 01:49:34,539 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:49:34,540 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/sv-benchmarks/c/product-lines/email_spec8_product20.cil.c [2021-11-07 01:49:34,567 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/data/ee4d739fa/48de43fa30a04be481d36056ee4dd827/FLAG1a3b383de [2021-11-07 01:49:34,742 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/data/ee4d739fa/48de43fa30a04be481d36056ee4dd827 [2021-11-07 01:49:34,750 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:49:34,751 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:49:34,754 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:49:34,754 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:49:34,758 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:49:34,759 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:49:34" (1/1) ... [2021-11-07 01:49:34,761 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a90744f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:34, skipping insertion in model container [2021-11-07 01:49:34,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:49:34" (1/1) ... [2021-11-07 01:49:34,769 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:49:34,855 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:49:35,292 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_b02e90d0-4693-4428-962d-e5fc2f3efc9c/sv-benchmarks/c/product-lines/email_spec8_product20.cil.c[19452,19465] [2021-11-07 01:49:35,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:49:35,517 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:49:35,537 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:49:35,571 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_b02e90d0-4693-4428-962d-e5fc2f3efc9c/sv-benchmarks/c/product-lines/email_spec8_product20.cil.c[19452,19465] [2021-11-07 01:49:35,667 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:49:35,690 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:49:35,733 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_b02e90d0-4693-4428-962d-e5fc2f3efc9c/sv-benchmarks/c/product-lines/email_spec8_product20.cil.c[19452,19465] [2021-11-07 01:49:35,824 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:49:35,870 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:49:35,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:35 WrapperNode [2021-11-07 01:49:35,871 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:49:35,872 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:49:35,872 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:49:35,872 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:49:35,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:35" (1/1) ... [2021-11-07 01:49:35,920 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:35" (1/1) ... [2021-11-07 01:49:36,026 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:49:36,027 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:49:36,027 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:49:36,027 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:49:36,035 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:35" (1/1) ... [2021-11-07 01:49:36,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:35" (1/1) ... [2021-11-07 01:49:36,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:35" (1/1) ... [2021-11-07 01:49:36,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:35" (1/1) ... [2021-11-07 01:49:36,137 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:35" (1/1) ... [2021-11-07 01:49:36,179 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:35" (1/1) ... [2021-11-07 01:49:36,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:35" (1/1) ... [2021-11-07 01:49:36,214 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:49:36,215 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:49:36,215 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:49:36,215 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:49:36,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:35" (1/1) ... [2021-11-07 01:49:36,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:49:36,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:49:36,244 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:49:36,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:49:36,290 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:49:36,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:49:36,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:49:36,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:49:36,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:49:41,714 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:49:41,714 INFO L299 CfgBuilder]: Removed 541 assume(true) statements. [2021-11-07 01:49:41,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:49:41 BoogieIcfgContainer [2021-11-07 01:49:41,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:49:41,723 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:49:41,738 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:49:41,741 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:49:41,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:49:34" (1/3) ... [2021-11-07 01:49:41,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@622d8e0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:49:41, skipping insertion in model container [2021-11-07 01:49:41,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:49:35" (2/3) ... [2021-11-07 01:49:41,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@622d8e0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:49:41, skipping insertion in model container [2021-11-07 01:49:41,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:49:41" (3/3) ... [2021-11-07 01:49:41,744 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec8_product20.cil.c [2021-11-07 01:49:41,748 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:49:41,749 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:49:41,833 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:49:41,840 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 01:49:41,840 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:49:41,878 INFO L276 IsEmpty]: Start isEmpty. Operand has 842 states, 835 states have (on average 1.7604790419161678) internal successors, (1470), 841 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:41,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 01:49:41,896 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:41,897 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 01:49:41,898 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 01:49:41,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:41,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1964609838, now seen corresponding path program 1 times [2021-11-07 01:49:41,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:41,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [79402790] [2021-11-07 01:49:41,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:41,917 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:41,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:41,920 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:41,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:49:42,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:42,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:49:42,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:42,523 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 01:49:42,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:42,641 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 01:49:42,642 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:42,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [79402790] [2021-11-07 01:49:42,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [79402790] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:42,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:42,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:49:42,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471019186] [2021-11-07 01:49:42,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:49:42,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:42,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:49:42,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:49:42,666 INFO L87 Difference]: Start difference. First operand has 842 states, 835 states have (on average 1.7604790419161678) internal successors, (1470), 841 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:42,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:42,767 INFO L93 Difference]: Finished difference Result 1399 states and 2417 transitions. [2021-11-07 01:49:42,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:49:42,769 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 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 01:49:42,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:42,795 INFO L225 Difference]: With dead ends: 1399 [2021-11-07 01:49:42,796 INFO L226 Difference]: Without dead ends: 754 [2021-11-07 01:49:42,804 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 86 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 01:49:42,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2021-11-07 01:49:42,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 754. [2021-11-07 01:49:42,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 748 states have (on average 1.7553475935828877) internal successors, (1313), 753 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:42,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1313 transitions. [2021-11-07 01:49:42,954 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1313 transitions. Word has length 44 [2021-11-07 01:49:42,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:42,955 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 1313 transitions. [2021-11-07 01:49:42,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:42,955 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1313 transitions. [2021-11-07 01:49:42,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:49:42,964 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:42,964 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:42,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:43,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:43,179 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 01:49:43,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:43,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1101286922, now seen corresponding path program 1 times [2021-11-07 01:49:43,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:43,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1912491317] [2021-11-07 01:49:43,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:43,182 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:43,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:43,183 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:43,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:49:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:43,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:49:43,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:43,764 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 01:49:43,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:43,914 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 01:49:43,914 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:43,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1912491317] [2021-11-07 01:49:43,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1912491317] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:43,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:43,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:49:43,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412074523] [2021-11-07 01:49:43,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:49:43,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:43,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:49:43,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:49:43,922 INFO L87 Difference]: Start difference. First operand 754 states and 1313 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:44,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:44,059 INFO L93 Difference]: Finished difference Result 2232 states and 3891 transitions. [2021-11-07 01:49:44,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:49:44,060 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 01:49:44,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:44,070 INFO L225 Difference]: With dead ends: 2232 [2021-11-07 01:49:44,070 INFO L226 Difference]: Without dead ends: 1493 [2021-11-07 01:49:44,072 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 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 01:49:44,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2021-11-07 01:49:44,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 753. [2021-11-07 01:49:44,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 747 states have (on average 1.751004016064257) internal successors, (1308), 752 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:44,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 1308 transitions. [2021-11-07 01:49:44,137 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 1308 transitions. Word has length 45 [2021-11-07 01:49:44,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:44,138 INFO L470 AbstractCegarLoop]: Abstraction has 753 states and 1308 transitions. [2021-11-07 01:49:44,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:44,139 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 1308 transitions. [2021-11-07 01:49:44,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 01:49:44,145 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:44,146 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 01:49:44,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:44,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:44,355 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 01:49:44,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:44,356 INFO L85 PathProgramCache]: Analyzing trace with hash -2094754704, now seen corresponding path program 1 times [2021-11-07 01:49:44,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:44,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [724261513] [2021-11-07 01:49:44,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:44,358 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:44,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:44,359 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:44,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:49:44,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:44,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:49:44,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:44,911 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 01:49:44,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:45,056 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 01:49:45,056 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:45,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [724261513] [2021-11-07 01:49:45,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [724261513] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:45,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:45,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:49:45,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511218934] [2021-11-07 01:49:45,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:49:45,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:45,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:49:45,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:49:45,059 INFO L87 Difference]: Start difference. First operand 753 states and 1308 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:45,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:45,380 INFO L93 Difference]: Finished difference Result 2929 states and 5094 transitions. [2021-11-07 01:49:45,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:49:45,381 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-07 01:49:45,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:45,395 INFO L225 Difference]: With dead ends: 2929 [2021-11-07 01:49:45,395 INFO L226 Difference]: Without dead ends: 2194 [2021-11-07 01:49:45,397 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 88 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 01:49:45,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2194 states. [2021-11-07 01:49:45,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2194 to 752. [2021-11-07 01:49:45,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 746 states have (on average 1.7479892761394102) internal successors, (1304), 751 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:45,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1304 transitions. [2021-11-07 01:49:45,451 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1304 transitions. Word has length 47 [2021-11-07 01:49:45,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:45,452 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 1304 transitions. [2021-11-07 01:49:45,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:45,452 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1304 transitions. [2021-11-07 01:49:45,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:49:45,454 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:45,454 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 01:49:45,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:45,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:45,672 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 01:49:45,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:45,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1288112515, now seen corresponding path program 1 times [2021-11-07 01:49:45,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:45,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [216708630] [2021-11-07 01:49:45,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:45,675 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:45,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:45,676 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:45,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:49:46,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:46,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:49:46,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:46,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:46,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:46,413 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 01:49:46,413 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:46,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [216708630] [2021-11-07 01:49:46,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [216708630] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:46,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:46,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:49:46,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065378073] [2021-11-07 01:49:46,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:49:46,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:46,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:49:46,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:49:46,417 INFO L87 Difference]: Start difference. First operand 752 states and 1304 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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 01:49:46,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:46,500 INFO L93 Difference]: Finished difference Result 1501 states and 2605 transitions. [2021-11-07 01:49:46,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:49:46,501 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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 48 [2021-11-07 01:49:46,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:46,506 INFO L225 Difference]: With dead ends: 1501 [2021-11-07 01:49:46,506 INFO L226 Difference]: Without dead ends: 757 [2021-11-07 01:49:46,507 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 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 01:49:46,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-11-07 01:49:46,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 752. [2021-11-07 01:49:46,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 746 states have (on average 1.7439678284182305) internal successors, (1301), 751 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:46,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1301 transitions. [2021-11-07 01:49:46,564 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1301 transitions. Word has length 48 [2021-11-07 01:49:46,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:46,564 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 1301 transitions. [2021-11-07 01:49:46,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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 01:49:46,564 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1301 transitions. [2021-11-07 01:49:46,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:49:46,566 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:46,566 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:46,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:46,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:46,780 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 01:49:46,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:46,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1978940584, now seen corresponding path program 1 times [2021-11-07 01:49:46,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:46,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2124094395] [2021-11-07 01:49:46,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:46,782 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:46,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:46,782 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:46,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:49:47,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:47,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:49:47,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:47,325 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 01:49:47,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:47,482 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 01:49:47,483 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:47,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2124094395] [2021-11-07 01:49:47,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2124094395] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:47,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:47,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:49:47,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376997924] [2021-11-07 01:49:47,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:49:47,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:47,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:49:47,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:49:47,486 INFO L87 Difference]: Start difference. First operand 752 states and 1301 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:47,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:47,843 INFO L93 Difference]: Finished difference Result 2916 states and 5070 transitions. [2021-11-07 01:49:47,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:49:47,843 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 01:49:47,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:47,858 INFO L225 Difference]: With dead ends: 2916 [2021-11-07 01:49:47,859 INFO L226 Difference]: Without dead ends: 2190 [2021-11-07 01:49:47,860 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 92 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 01:49:47,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2190 states. [2021-11-07 01:49:47,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2190 to 752. [2021-11-07 01:49:47,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 746 states have (on average 1.739946380697051) internal successors, (1298), 751 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:47,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1298 transitions. [2021-11-07 01:49:47,929 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1298 transitions. Word has length 49 [2021-11-07 01:49:47,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:47,930 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 1298 transitions. [2021-11-07 01:49:47,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:47,931 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1298 transitions. [2021-11-07 01:49:47,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:49:47,933 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:47,933 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:47,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:48,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:48,148 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 01:49:48,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:48,148 INFO L85 PathProgramCache]: Analyzing trace with hash 593791443, now seen corresponding path program 1 times [2021-11-07 01:49:48,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:48,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1194276906] [2021-11-07 01:49:48,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:48,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:48,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:48,150 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:48,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:49:48,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:48,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:49:48,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:48,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:48,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:48,796 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 01:49:48,796 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:48,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1194276906] [2021-11-07 01:49:48,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1194276906] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:48,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:48,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:49:48,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493837482] [2021-11-07 01:49:48,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:49:48,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:48,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:49:48,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:49:48,798 INFO L87 Difference]: Start difference. First operand 752 states and 1298 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:48,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:48,945 INFO L93 Difference]: Finished difference Result 1947 states and 3359 transitions. [2021-11-07 01:49:48,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:49:48,946 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 01:49:48,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:48,955 INFO L225 Difference]: With dead ends: 1947 [2021-11-07 01:49:48,956 INFO L226 Difference]: Without dead ends: 1478 [2021-11-07 01:49:48,957 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 98 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 01:49:48,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2021-11-07 01:49:49,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1009. [2021-11-07 01:49:49,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1003 states have (on average 1.765702891326022) internal successors, (1771), 1008 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:49,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 1771 transitions. [2021-11-07 01:49:49,051 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 1771 transitions. Word has length 51 [2021-11-07 01:49:49,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:49,051 INFO L470 AbstractCegarLoop]: Abstraction has 1009 states and 1771 transitions. [2021-11-07 01:49:49,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:49,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 1771 transitions. [2021-11-07 01:49:49,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:49:49,054 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:49,054 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 01:49:49,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:49,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:49,269 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 01:49:49,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:49,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1413731236, now seen corresponding path program 1 times [2021-11-07 01:49:49,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:49,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [233477429] [2021-11-07 01:49:49,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:49,271 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:49,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:49,272 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:49,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:49:49,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:49,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:49:49,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:49,845 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 01:49:49,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:49,968 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 01:49:49,968 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:49,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [233477429] [2021-11-07 01:49:49,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [233477429] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:49,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:49,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:49:49,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550928812] [2021-11-07 01:49:49,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:49:49,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:49,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:49:49,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:49,970 INFO L87 Difference]: Start difference. First operand 1009 states and 1771 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 01:49:50,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:50,136 INFO L93 Difference]: Finished difference Result 2608 states and 4579 transitions. [2021-11-07 01:49:50,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:49:50,137 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 01:49:50,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:50,147 INFO L225 Difference]: With dead ends: 2608 [2021-11-07 01:49:50,148 INFO L226 Difference]: Without dead ends: 1683 [2021-11-07 01:49:50,149 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 01:49:50,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2021-11-07 01:49:50,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1214. [2021-11-07 01:49:50,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1208 states have (on average 1.7773178807947019) internal successors, (2147), 1213 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:50,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 2147 transitions. [2021-11-07 01:49:50,244 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 2147 transitions. Word has length 63 [2021-11-07 01:49:50,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:50,245 INFO L470 AbstractCegarLoop]: Abstraction has 1214 states and 2147 transitions. [2021-11-07 01:49:50,245 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 01:49:50,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 2147 transitions. [2021-11-07 01:49:50,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:49:50,247 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:50,248 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 01:49:50,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:50,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:50,466 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 01:49:50,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:50,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1288171395, now seen corresponding path program 1 times [2021-11-07 01:49:50,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:50,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937793136] [2021-11-07 01:49:50,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:50,467 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:50,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:50,468 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:50,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:49:50,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:50,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:49:50,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:51,068 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 01:49:51,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:51,222 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 01:49:51,222 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:51,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [937793136] [2021-11-07 01:49:51,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [937793136] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:51,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:51,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:49:51,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034353595] [2021-11-07 01:49:51,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:49:51,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:51,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:49:51,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:51,228 INFO L87 Difference]: Start difference. First operand 1214 states and 2147 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 01:49:51,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:51,392 INFO L93 Difference]: Finished difference Result 3255 states and 5772 transitions. [2021-11-07 01:49:51,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:49:51,392 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 01:49:51,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:51,405 INFO L225 Difference]: With dead ends: 3255 [2021-11-07 01:49:51,406 INFO L226 Difference]: Without dead ends: 2133 [2021-11-07 01:49:51,408 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 01:49:51,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2021-11-07 01:49:51,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 1664. [2021-11-07 01:49:51,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1658 states have (on average 1.7943305186972256) internal successors, (2975), 1663 states have internal predecessors, (2975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:51,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 2975 transitions. [2021-11-07 01:49:51,531 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 2975 transitions. Word has length 64 [2021-11-07 01:49:51,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:51,531 INFO L470 AbstractCegarLoop]: Abstraction has 1664 states and 2975 transitions. [2021-11-07 01:49:51,532 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 01:49:51,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 2975 transitions. [2021-11-07 01:49:51,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:49:51,535 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:51,535 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 01:49:51,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:51,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:51,749 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 01:49:51,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:51,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1754038226, now seen corresponding path program 1 times [2021-11-07 01:49:51,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:51,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [211649158] [2021-11-07 01:49:51,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:51,751 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:51,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:51,751 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:51,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:49:52,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:52,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:49:52,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:52,375 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 01:49:52,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:52,513 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 01:49:52,513 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:52,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [211649158] [2021-11-07 01:49:52,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [211649158] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:52,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:52,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:49:52,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791264359] [2021-11-07 01:49:52,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:49:52,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:52,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:49:52,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:52,516 INFO L87 Difference]: Start difference. First operand 1664 states and 2975 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 01:49:52,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:52,730 INFO L93 Difference]: Finished difference Result 4585 states and 8225 transitions. [2021-11-07 01:49:52,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:49:52,731 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 01:49:52,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:52,749 INFO L225 Difference]: With dead ends: 4585 [2021-11-07 01:49:52,749 INFO L226 Difference]: Without dead ends: 3021 [2021-11-07 01:49:52,752 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 01:49:52,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3021 states. [2021-11-07 01:49:52,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3021 to 2552. [2021-11-07 01:49:52,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2546 states have (on average 1.8106834249803614) internal successors, (4610), 2551 states have internal predecessors, (4610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:52,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 4610 transitions. [2021-11-07 01:49:52,981 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 4610 transitions. Word has length 65 [2021-11-07 01:49:52,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:52,982 INFO L470 AbstractCegarLoop]: Abstraction has 2552 states and 4610 transitions. [2021-11-07 01:49:52,982 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 01:49:52,982 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 4610 transitions. [2021-11-07 01:49:52,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:49:52,986 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:52,986 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 01:49:53,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:53,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:53,201 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 01:49:53,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:53,202 INFO L85 PathProgramCache]: Analyzing trace with hash 546495826, now seen corresponding path program 1 times [2021-11-07 01:49:53,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:53,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [998573136] [2021-11-07 01:49:53,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:53,203 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:53,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:53,204 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:53,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:49:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:53,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:49:53,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:53,893 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 01:49:53,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:54,058 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 01:49:54,058 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:54,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [998573136] [2021-11-07 01:49:54,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [998573136] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:54,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:54,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:49:54,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047890702] [2021-11-07 01:49:54,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:49:54,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:54,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:49:54,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:54,061 INFO L87 Difference]: Start difference. First operand 2552 states and 4610 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 01:49:54,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:54,319 INFO L93 Difference]: Finished difference Result 6985 states and 12649 transitions. [2021-11-07 01:49:54,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:49:54,320 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 01:49:54,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:54,347 INFO L225 Difference]: With dead ends: 6985 [2021-11-07 01:49:54,347 INFO L226 Difference]: Without dead ends: 4567 [2021-11-07 01:49:54,351 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 01:49:54,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4567 states. [2021-11-07 01:49:54,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4567 to 4098. [2021-11-07 01:49:54,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4098 states, 4092 states have (on average 1.8218475073313782) internal successors, (7455), 4097 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:54,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4098 states to 4098 states and 7455 transitions. [2021-11-07 01:49:54,635 INFO L78 Accepts]: Start accepts. Automaton has 4098 states and 7455 transitions. Word has length 66 [2021-11-07 01:49:54,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:54,635 INFO L470 AbstractCegarLoop]: Abstraction has 4098 states and 7455 transitions. [2021-11-07 01:49:54,636 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 01:49:54,636 INFO L276 IsEmpty]: Start isEmpty. Operand 4098 states and 7455 transitions. [2021-11-07 01:49:54,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:49:54,644 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:54,644 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:54,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:54,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:54,866 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 01:49:54,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:54,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1955303939, now seen corresponding path program 1 times [2021-11-07 01:49:54,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:54,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089245265] [2021-11-07 01:49:54,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:54,868 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:54,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:54,868 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:54,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:49:55,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:55,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:49:55,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:55,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:55,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:55,676 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 01:49:55,677 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:55,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089245265] [2021-11-07 01:49:55,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089245265] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:55,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:55,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:49:55,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234311391] [2021-11-07 01:49:55,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:49:55,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:55,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:49:55,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:55,681 INFO L87 Difference]: Start difference. First operand 4098 states and 7455 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 01:49:56,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:56,098 INFO L93 Difference]: Finished difference Result 11339 states and 20667 transitions. [2021-11-07 01:49:56,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:49:56,099 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 01:49:56,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:56,141 INFO L225 Difference]: With dead ends: 11339 [2021-11-07 01:49:56,142 INFO L226 Difference]: Without dead ends: 7409 [2021-11-07 01:49:56,147 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 01:49:56,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7409 states. [2021-11-07 01:49:56,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7409 to 6940. [2021-11-07 01:49:56,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6940 states, 6934 states have (on average 1.8286703201615229) internal successors, (12680), 6939 states have internal predecessors, (12680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:56,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6940 states to 6940 states and 12680 transitions. [2021-11-07 01:49:56,606 INFO L78 Accepts]: Start accepts. Automaton has 6940 states and 12680 transitions. Word has length 67 [2021-11-07 01:49:56,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:56,606 INFO L470 AbstractCegarLoop]: Abstraction has 6940 states and 12680 transitions. [2021-11-07 01:49:56,607 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 01:49:56,607 INFO L276 IsEmpty]: Start isEmpty. Operand 6940 states and 12680 transitions. [2021-11-07 01:49:56,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:49:56,612 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:56,612 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 01:49:56,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:56,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:56,828 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 01:49:56,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:56,828 INFO L85 PathProgramCache]: Analyzing trace with hash -323997, now seen corresponding path program 1 times [2021-11-07 01:49:56,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:56,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1938152815] [2021-11-07 01:49:56,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:56,829 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:56,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:56,830 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:56,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:49:57,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:57,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:49:57,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:57,536 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 01:49:57,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:57,713 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 01:49:57,713 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:57,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1938152815] [2021-11-07 01:49:57,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1938152815] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:57,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:57,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:49:57,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895421251] [2021-11-07 01:49:57,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:49:57,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:57,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:49:57,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:57,716 INFO L87 Difference]: Start difference. First operand 6940 states and 12680 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 01:49:58,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:58,277 INFO L93 Difference]: Finished difference Result 20323 states and 37184 transitions. [2021-11-07 01:49:58,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:49:58,278 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 01:49:58,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:58,331 INFO L225 Difference]: With dead ends: 20323 [2021-11-07 01:49:58,331 INFO L226 Difference]: Without dead ends: 13555 [2021-11-07 01:49:58,341 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 01:49:58,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13555 states. [2021-11-07 01:49:59,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13555 to 13086. [2021-11-07 01:49:59,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13086 states, 13080 states have (on average 1.831880733944954) internal successors, (23961), 13085 states have internal predecessors, (23961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:59,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13086 states to 13086 states and 23961 transitions. [2021-11-07 01:49:59,141 INFO L78 Accepts]: Start accepts. Automaton has 13086 states and 23961 transitions. Word has length 68 [2021-11-07 01:49:59,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:59,142 INFO L470 AbstractCegarLoop]: Abstraction has 13086 states and 23961 transitions. [2021-11-07 01:49:59,142 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 01:49:59,142 INFO L276 IsEmpty]: Start isEmpty. Operand 13086 states and 23961 transitions. [2021-11-07 01:49:59,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:49:59,157 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:59,158 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:59,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:59,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:59,378 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 01:49:59,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:59,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1572089971, now seen corresponding path program 1 times [2021-11-07 01:49:59,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:59,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [930308708] [2021-11-07 01:49:59,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:59,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:59,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:59,381 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:59,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:49:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:59,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:49:59,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:00,133 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 01:50:00,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:00,338 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 01:50:00,338 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:00,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [930308708] [2021-11-07 01:50:00,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [930308708] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:00,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:00,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:50:00,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086754809] [2021-11-07 01:50:00,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:50:00,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:00,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:50:00,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:50:00,340 INFO L87 Difference]: Start difference. First operand 13086 states and 23961 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:03,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:03,538 INFO L93 Difference]: Finished difference Result 32427 states and 59374 transitions. [2021-11-07 01:50:03,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:50:03,539 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:50:03,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:03,593 INFO L225 Difference]: With dead ends: 32427 [2021-11-07 01:50:03,593 INFO L226 Difference]: Without dead ends: 19634 [2021-11-07 01:50:03,611 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 132 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 01:50:03,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19634 states. [2021-11-07 01:50:04,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19634 to 13053. [2021-11-07 01:50:04,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13053 states, 13047 states have (on average 1.826396872844332) internal successors, (23829), 13052 states have internal predecessors, (23829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:04,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13053 states to 13053 states and 23829 transitions. [2021-11-07 01:50:04,287 INFO L78 Accepts]: Start accepts. Automaton has 13053 states and 23829 transitions. Word has length 69 [2021-11-07 01:50:04,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:04,288 INFO L470 AbstractCegarLoop]: Abstraction has 13053 states and 23829 transitions. [2021-11-07 01:50:04,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:04,288 INFO L276 IsEmpty]: Start isEmpty. Operand 13053 states and 23829 transitions. [2021-11-07 01:50:04,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:50:04,295 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:04,296 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 01:50:04,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:04,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:04,511 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 01:50:04,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:04,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1828593422, now seen corresponding path program 1 times [2021-11-07 01:50:04,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:04,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093953419] [2021-11-07 01:50:04,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:04,512 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:04,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:04,513 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:04,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:50:05,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:05,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:50:05,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:05,426 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 01:50:05,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:05,605 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 01:50:05,605 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:05,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093953419] [2021-11-07 01:50:05,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093953419] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:05,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:05,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:50:05,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220280377] [2021-11-07 01:50:05,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:50:05,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:05,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:50:05,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:50:05,607 INFO L87 Difference]: Start difference. First operand 13053 states and 23829 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 01:50:06,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:06,666 INFO L93 Difference]: Finished difference Result 38366 states and 70114 transitions. [2021-11-07 01:50:06,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:50:06,666 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 01:50:06,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:06,730 INFO L225 Difference]: With dead ends: 38366 [2021-11-07 01:50:06,731 INFO L226 Difference]: Without dead ends: 25492 [2021-11-07 01:50:06,748 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 01:50:06,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25492 states. [2021-11-07 01:50:07,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25492 to 25023. [2021-11-07 01:50:07,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25023 states, 25017 states have (on average 1.8274773154255106) internal successors, (45718), 25022 states have internal predecessors, (45718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:07,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25023 states to 25023 states and 45718 transitions. [2021-11-07 01:50:07,906 INFO L78 Accepts]: Start accepts. Automaton has 25023 states and 45718 transitions. Word has length 69 [2021-11-07 01:50:07,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:07,906 INFO L470 AbstractCegarLoop]: Abstraction has 25023 states and 45718 transitions. [2021-11-07 01:50:07,907 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 01:50:07,907 INFO L276 IsEmpty]: Start isEmpty. Operand 25023 states and 45718 transitions. [2021-11-07 01:50:07,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:50:07,916 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:07,916 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 01:50:07,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:08,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:08,132 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 01:50:08,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:08,132 INFO L85 PathProgramCache]: Analyzing trace with hash 850318885, now seen corresponding path program 1 times [2021-11-07 01:50:08,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:08,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [947729983] [2021-11-07 01:50:08,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:08,133 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:08,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:08,134 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:08,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:50:08,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:08,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:50:08,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:08,913 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 01:50:08,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:09,067 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 01:50:09,067 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:09,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [947729983] [2021-11-07 01:50:09,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [947729983] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:09,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:09,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:50:09,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402991341] [2021-11-07 01:50:09,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:50:09,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:09,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:50:09,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:50:09,070 INFO L87 Difference]: Start difference. First operand 25023 states and 45718 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 01:50:10,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:10,922 INFO L93 Difference]: Finished difference Result 68915 states and 125517 transitions. [2021-11-07 01:50:10,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:50:10,922 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 01:50:10,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:11,048 INFO L225 Difference]: With dead ends: 68915 [2021-11-07 01:50:11,048 INFO L226 Difference]: Without dead ends: 44118 [2021-11-07 01:50:11,089 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 01:50:11,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44118 states. [2021-11-07 01:50:13,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44118 to 43649. [2021-11-07 01:50:13,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43649 states, 43643 states have (on average 1.815984235730816) internal successors, (79255), 43648 states have internal predecessors, (79255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:13,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43649 states to 43649 states and 79255 transitions. [2021-11-07 01:50:13,549 INFO L78 Accepts]: Start accepts. Automaton has 43649 states and 79255 transitions. Word has length 70 [2021-11-07 01:50:13,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:13,550 INFO L470 AbstractCegarLoop]: Abstraction has 43649 states and 79255 transitions. [2021-11-07 01:50:13,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:13,550 INFO L276 IsEmpty]: Start isEmpty. Operand 43649 states and 79255 transitions. [2021-11-07 01:50:13,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:50:13,560 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:13,560 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:50:13,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:13,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:13,777 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 01:50:13,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:13,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1079437625, now seen corresponding path program 1 times [2021-11-07 01:50:13,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:13,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [778607820] [2021-11-07 01:50:13,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:13,779 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:13,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:13,780 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:13,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:50:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:14,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:50:14,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:14,722 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 01:50:14,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:14,953 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 01:50:14,953 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:14,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [778607820] [2021-11-07 01:50:14,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [778607820] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:14,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:14,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:50:14,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537126102] [2021-11-07 01:50:14,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:50:14,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:14,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:50:14,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:50:14,955 INFO L87 Difference]: Start difference. First operand 43649 states and 79255 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:21,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:21,878 INFO L93 Difference]: Finished difference Result 169876 states and 308342 transitions. [2021-11-07 01:50:21,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:50:21,879 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:50:21,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:22,381 INFO L225 Difference]: With dead ends: 169876 [2021-11-07 01:50:22,381 INFO L226 Difference]: Without dead ends: 126519 [2021-11-07 01:50:22,435 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:50:22,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126519 states. [2021-11-07 01:50:25,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126519 to 43391. [2021-11-07 01:50:25,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43391 states, 43385 states have (on average 1.802996427336637) internal successors, (78223), 43390 states have internal predecessors, (78223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:25,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43391 states to 43391 states and 78223 transitions. [2021-11-07 01:50:25,920 INFO L78 Accepts]: Start accepts. Automaton has 43391 states and 78223 transitions. Word has length 71 [2021-11-07 01:50:25,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:25,920 INFO L470 AbstractCegarLoop]: Abstraction has 43391 states and 78223 transitions. [2021-11-07 01:50:25,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:25,920 INFO L276 IsEmpty]: Start isEmpty. Operand 43391 states and 78223 transitions. [2021-11-07 01:50:25,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:50:25,930 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:25,931 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:50:25,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:26,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:26,139 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 01:50:26,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:26,139 INFO L85 PathProgramCache]: Analyzing trace with hash 752074199, now seen corresponding path program 1 times [2021-11-07 01:50:26,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:26,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1218089033] [2021-11-07 01:50:26,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:26,140 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:26,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:26,141 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:26,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:50:26,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:26,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:50:26,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:26,951 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 01:50:26,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:27,100 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 01:50:27,100 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:27,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1218089033] [2021-11-07 01:50:27,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1218089033] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:27,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:27,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:50:27,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611038511] [2021-11-07 01:50:27,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:50:27,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:27,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:50:27,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:50:27,103 INFO L87 Difference]: Start difference. First operand 43391 states and 78223 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:29,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:29,101 INFO L93 Difference]: Finished difference Result 86953 states and 156737 transitions. [2021-11-07 01:50:29,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:50:29,101 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:50:29,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:29,185 INFO L225 Difference]: With dead ends: 86953 [2021-11-07 01:50:29,185 INFO L226 Difference]: Without dead ends: 43860 [2021-11-07 01:50:29,215 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 138 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 01:50:29,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43860 states. [2021-11-07 01:50:31,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43860 to 43391. [2021-11-07 01:50:31,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43391 states, 43385 states have (on average 1.800046098882102) internal successors, (78095), 43390 states have internal predecessors, (78095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:31,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43391 states to 43391 states and 78095 transitions. [2021-11-07 01:50:31,551 INFO L78 Accepts]: Start accepts. Automaton has 43391 states and 78095 transitions. Word has length 71 [2021-11-07 01:50:31,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:31,552 INFO L470 AbstractCegarLoop]: Abstraction has 43391 states and 78095 transitions. [2021-11-07 01:50:31,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:31,552 INFO L276 IsEmpty]: Start isEmpty. Operand 43391 states and 78095 transitions. [2021-11-07 01:50:31,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:50:31,558 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:31,558 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:50:31,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:31,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:31,762 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 01:50:31,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:31,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1524593220, now seen corresponding path program 1 times [2021-11-07 01:50:31,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:31,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [525305092] [2021-11-07 01:50:31,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:31,764 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:31,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:31,764 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:31,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b02e90d0-4693-4428-962d-e5fc2f3efc9c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:50:32,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:32,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:50:32,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:32,655 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 01:50:32,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:32,823 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 01:50:32,823 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:32,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [525305092] [2021-11-07 01:50:32,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [525305092] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:32,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:32,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:50:32,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363810427] [2021-11-07 01:50:32,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:50:32,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:32,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:50:32,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:50:32,827 INFO L87 Difference]: Start difference. First operand 43391 states and 78095 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:36,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:36,355 INFO L93 Difference]: Finished difference Result 121683 states and 218763 transitions. [2021-11-07 01:50:36,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:50:36,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:50:36,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:36,493 INFO L225 Difference]: With dead ends: 121683 [2021-11-07 01:50:36,493 INFO L226 Difference]: Without dead ends: 78550 [2021-11-07 01:50:36,520 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:50:36,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78550 states.