./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec11_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_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/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_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/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_112034d7-7ab2-47d6-a5dc-b71edb8f6273/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 b9d5581bc5c458c0b8250652569dd3286beeda44b685a7a0cdda121612582c0c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:06:38,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:06:38,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:06:38,825 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:06:38,826 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:06:38,832 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:06:38,835 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:06:38,840 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:06:38,843 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:06:38,852 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:06:38,854 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:06:38,857 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:06:38,857 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:06:38,861 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:06:38,865 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:06:38,872 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:06:38,876 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:06:38,878 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:06:38,880 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:06:38,887 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:06:38,894 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:06:38,896 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:06:38,901 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:06:38,902 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:06:38,910 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:06:38,911 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:06:38,912 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:06:38,914 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:06:38,915 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:06:38,917 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:06:38,918 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:06:38,920 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:06:38,922 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:06:38,924 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:06:38,926 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:06:38,926 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:06:38,927 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:06:38,928 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:06:38,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:06:38,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:06:38,930 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:06:38,931 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:06:38,988 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:06:38,989 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:06:38,990 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:06:38,991 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:06:38,991 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:06:38,992 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:06:38,992 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:06:38,992 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:06:39,000 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:06:39,001 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:06:39,002 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:06:39,003 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:06:39,003 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:06:39,003 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:06:39,003 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:06:39,004 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:06:39,005 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:06:39,005 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:06:39,005 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:06:39,006 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:06:39,006 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:06:39,006 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:06:39,006 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:06:39,007 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:06:39,007 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:06:39,007 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:06:39,007 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:06:39,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:06:39,008 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:06:39,010 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:06:39,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:06:39,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:06:39,011 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:06:39,012 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:06:39,012 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:06:39,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:06:39,012 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:06:39,013 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:06:39,013 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:06:39,013 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_112034d7-7ab2-47d6-a5dc-b71edb8f6273/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b9d5581bc5c458c0b8250652569dd3286beeda44b685a7a0cdda121612582c0c [2021-11-07 02:06:39,374 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:06:39,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:06:39,411 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:06:39,412 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:06:39,413 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:06:39,414 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec11_product20.cil.c [2021-11-07 02:06:39,496 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/data/d998591d8/affdfb01b89a424ab2fa5f7ddcd4618c/FLAG73ba3b59e [2021-11-07 02:06:40,373 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:06:40,376 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/sv-benchmarks/c/product-lines/email_spec11_product20.cil.c [2021-11-07 02:06:40,406 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/data/d998591d8/affdfb01b89a424ab2fa5f7ddcd4618c/FLAG73ba3b59e [2021-11-07 02:06:40,492 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/data/d998591d8/affdfb01b89a424ab2fa5f7ddcd4618c [2021-11-07 02:06:40,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:06:40,497 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:06:40,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:06:40,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:06:40,503 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:06:40,504 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:06:40" (1/1) ... [2021-11-07 02:06:40,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@798f4e56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:40, skipping insertion in model container [2021-11-07 02:06:40,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:06:40" (1/1) ... [2021-11-07 02:06:40,518 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:06:40,589 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:06:40,833 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_112034d7-7ab2-47d6-a5dc-b71edb8f6273/sv-benchmarks/c/product-lines/email_spec11_product20.cil.c[1543,1556] [2021-11-07 02:06:41,310 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:06:41,325 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 02:06:41,326 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@48999304 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:41, skipping insertion in model container [2021-11-07 02:06:41,326 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:06:41,327 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:06:41,329 INFO L168 Benchmark]: Toolchain (without parser) took 831.15 ms. Allocated memory is still 111.1 MB. Free memory was 70.8 MB in the beginning and 73.0 MB in the end (delta: -2.1 MB). Peak memory consumption was 12.9 MB. Max. memory is 16.1 GB. [2021-11-07 02:06:41,330 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 111.1 MB. Free memory is still 89.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:06:41,331 INFO L168 Benchmark]: CACSL2BoogieTranslator took 827.85 ms. Allocated memory is still 111.1 MB. Free memory was 70.6 MB in the beginning and 73.0 MB in the end (delta: -2.3 MB). Peak memory consumption was 12.9 MB. Max. memory is 16.1 GB. [2021-11-07 02:06:41,333 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 111.1 MB. Free memory is still 89.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 827.85 ms. Allocated memory is still 111.1 MB. Free memory was 70.6 MB in the beginning and 73.0 MB in the end (delta: -2.3 MB). Peak memory consumption was 12.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1522]: 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_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/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_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/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_112034d7-7ab2-47d6-a5dc-b71edb8f6273/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 b9d5581bc5c458c0b8250652569dd3286beeda44b685a7a0cdda121612582c0c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:06:44,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:06:44,059 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:06:44,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:06:44,112 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:06:44,114 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:06:44,116 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:06:44,119 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:06:44,121 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:06:44,123 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:06:44,125 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:06:44,127 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:06:44,127 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:06:44,129 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:06:44,131 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:06:44,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:06:44,134 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:06:44,136 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:06:44,138 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:06:44,141 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:06:44,149 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:06:44,154 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:06:44,158 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:06:44,161 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:06:44,171 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:06:44,172 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:06:44,172 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:06:44,178 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:06:44,178 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:06:44,180 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:06:44,180 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:06:44,181 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:06:44,184 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:06:44,185 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:06:44,187 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:06:44,188 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:06:44,189 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:06:44,189 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:06:44,189 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:06:44,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:06:44,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:06:44,194 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:06:44,256 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:06:44,257 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:06:44,258 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:06:44,259 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:06:44,259 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:06:44,259 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:06:44,260 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:06:44,260 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:06:44,260 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:06:44,262 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:06:44,263 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:06:44,264 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:06:44,264 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:06:44,264 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:06:44,265 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:06:44,265 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:06:44,265 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:06:44,265 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:06:44,266 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:06:44,266 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:06:44,266 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:06:44,267 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:06:44,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:06:44,267 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:06:44,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:06:44,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:06:44,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:06:44,269 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:06:44,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:06:44,269 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:06:44,269 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:06:44,270 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:06:44,270 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:06:44,270 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:06:44,271 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:06:44,271 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_112034d7-7ab2-47d6-a5dc-b71edb8f6273/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b9d5581bc5c458c0b8250652569dd3286beeda44b685a7a0cdda121612582c0c [2021-11-07 02:06:44,804 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:06:44,842 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:06:44,846 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:06:44,847 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:06:44,848 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:06:44,851 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec11_product20.cil.c [2021-11-07 02:06:44,942 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/data/44955f912/9f29e3be3eef4c6785d81d29f657e82a/FLAGcfe48c3e0 [2021-11-07 02:06:45,904 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:06:45,905 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/sv-benchmarks/c/product-lines/email_spec11_product20.cil.c [2021-11-07 02:06:45,945 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/data/44955f912/9f29e3be3eef4c6785d81d29f657e82a/FLAGcfe48c3e0 [2021-11-07 02:06:45,984 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/data/44955f912/9f29e3be3eef4c6785d81d29f657e82a [2021-11-07 02:06:45,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:06:45,991 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:06:45,996 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:06:45,996 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:06:46,001 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:06:46,006 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:06:45" (1/1) ... [2021-11-07 02:06:46,008 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63cb9a36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:46, skipping insertion in model container [2021-11-07 02:06:46,008 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:06:45" (1/1) ... [2021-11-07 02:06:46,018 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:06:46,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:06:46,305 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_112034d7-7ab2-47d6-a5dc-b71edb8f6273/sv-benchmarks/c/product-lines/email_spec11_product20.cil.c[1543,1556] [2021-11-07 02:06:46,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:06:46,778 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:06:46,809 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:06:46,821 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_112034d7-7ab2-47d6-a5dc-b71edb8f6273/sv-benchmarks/c/product-lines/email_spec11_product20.cil.c[1543,1556] [2021-11-07 02:06:46,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:06:46,947 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:06:46,961 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_112034d7-7ab2-47d6-a5dc-b71edb8f6273/sv-benchmarks/c/product-lines/email_spec11_product20.cil.c[1543,1556] [2021-11-07 02:06:47,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:06:47,167 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:06:47,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:47 WrapperNode [2021-11-07 02:06:47,168 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:06:47,170 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:06:47,170 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:06:47,171 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:06:47,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:47" (1/1) ... [2021-11-07 02:06:47,252 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:47" (1/1) ... [2021-11-07 02:06:47,421 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:06:47,422 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:06:47,422 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:06:47,422 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:06:47,433 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:47" (1/1) ... [2021-11-07 02:06:47,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:47" (1/1) ... [2021-11-07 02:06:47,460 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:47" (1/1) ... [2021-11-07 02:06:47,461 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:47" (1/1) ... [2021-11-07 02:06:47,541 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:47" (1/1) ... [2021-11-07 02:06:47,614 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:47" (1/1) ... [2021-11-07 02:06:47,625 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:47" (1/1) ... [2021-11-07 02:06:47,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:06:47,651 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:06:47,651 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:06:47,651 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:06:47,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:47" (1/1) ... [2021-11-07 02:06:47,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:06:47,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:06:47,715 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:06:47,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:06:47,807 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 02:06:47,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:06:47,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:06:47,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:06:47,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:06:53,641 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:06:53,641 INFO L299 CfgBuilder]: Removed 541 assume(true) statements. [2021-11-07 02:06:53,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:06:53 BoogieIcfgContainer [2021-11-07 02:06:53,646 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:06:53,649 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:06:53,650 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:06:53,653 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:06:53,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:06:45" (1/3) ... [2021-11-07 02:06:53,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c01a60e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:06:53, skipping insertion in model container [2021-11-07 02:06:53,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:47" (2/3) ... [2021-11-07 02:06:53,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c01a60e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:06:53, skipping insertion in model container [2021-11-07 02:06:53,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:06:53" (3/3) ... [2021-11-07 02:06:53,658 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec11_product20.cil.c [2021-11-07 02:06:53,665 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:06:53,665 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 02:06:53,740 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:06:53,748 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 02:06:53,748 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 02:06:53,797 INFO L276 IsEmpty]: Start isEmpty. Operand has 830 states, 823 states have (on average 1.7569866342648846) internal successors, (1446), 829 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:53,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 02:06:53,832 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:53,833 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:53,834 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:06:53,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:53,841 INFO L85 PathProgramCache]: Analyzing trace with hash -634054842, now seen corresponding path program 1 times [2021-11-07 02:06:53,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:53,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [424127485] [2021-11-07 02:06:53,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:53,864 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:53,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:53,871 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:53,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:06:54,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:54,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:06:54,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:54,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:54,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:54,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:54,908 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:54,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [424127485] [2021-11-07 02:06:54,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [424127485] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:54,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:54,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:06:54,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666453494] [2021-11-07 02:06:54,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:06:54,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:54,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:06:54,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:06:54,947 INFO L87 Difference]: Start difference. First operand has 830 states, 823 states have (on average 1.7569866342648846) internal successors, (1446), 829 states have internal predecessors, (1446), 0 states have call successors, (0), 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 27.5) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:55,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:55,074 INFO L93 Difference]: Finished difference Result 1375 states and 2369 transitions. [2021-11-07 02:06:55,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:06:55,077 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 02:06:55,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:55,111 INFO L225 Difference]: With dead ends: 1375 [2021-11-07 02:06:55,111 INFO L226 Difference]: Without dead ends: 812 [2021-11-07 02:06:55,122 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:06:55,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-11-07 02:06:55,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 812. [2021-11-07 02:06:55,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 806 states have (on average 1.7456575682382134) internal successors, (1407), 811 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:55,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1407 transitions. [2021-11-07 02:06:55,274 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1407 transitions. Word has length 55 [2021-11-07 02:06:55,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:55,275 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 1407 transitions. [2021-11-07 02:06:55,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 27.5) internal successors, (55), 2 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:55,276 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1407 transitions. [2021-11-07 02:06:55,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 02:06:55,287 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:55,288 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:55,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 02:06:55,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:55,489 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:06:55,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:55,490 INFO L85 PathProgramCache]: Analyzing trace with hash -381549298, now seen corresponding path program 1 times [2021-11-07 02:06:55,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:55,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1478903916] [2021-11-07 02:06:55,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:55,492 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:55,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:55,496 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:55,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:06:56,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:56,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:06:56,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:56,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:56,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:56,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:56,407 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:56,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1478903916] [2021-11-07 02:06:56,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1478903916] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:56,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:56,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:06:56,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413561934] [2021-11-07 02:06:56,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:06:56,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:56,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:06:56,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:06:56,416 INFO L87 Difference]: Start difference. First operand 812 states and 1407 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:56,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:56,631 INFO L93 Difference]: Finished difference Result 2406 states and 4173 transitions. [2021-11-07 02:06:56,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:06:56,633 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-07 02:06:56,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:56,653 INFO L225 Difference]: With dead ends: 2406 [2021-11-07 02:06:56,653 INFO L226 Difference]: Without dead ends: 1609 [2021-11-07 02:06:56,657 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:06:56,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2021-11-07 02:06:56,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 811. [2021-11-07 02:06:56,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 805 states have (on average 1.7416149068322981) internal successors, (1402), 810 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:56,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1402 transitions. [2021-11-07 02:06:56,758 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1402 transitions. Word has length 56 [2021-11-07 02:06:56,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:56,760 INFO L470 AbstractCegarLoop]: Abstraction has 811 states and 1402 transitions. [2021-11-07 02:06:56,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:56,761 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1402 transitions. [2021-11-07 02:06:56,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 02:06:56,775 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:56,776 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:56,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:56,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:56,993 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:06:56,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:56,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1539433192, now seen corresponding path program 1 times [2021-11-07 02:06:56,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:56,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [292484085] [2021-11-07 02:06:56,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:56,996 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:56,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:56,998 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:57,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:06:57,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:57,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:06:57,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:57,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:57,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:58,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:58,026 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:58,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [292484085] [2021-11-07 02:06:58,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [292484085] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:58,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:58,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:06:58,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574154210] [2021-11-07 02:06:58,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:06:58,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:58,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:06:58,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:06:58,030 INFO L87 Difference]: Start difference. First operand 811 states and 1402 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 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 02:06:58,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:58,443 INFO L93 Difference]: Finished difference Result 3161 states and 5470 transitions. [2021-11-07 02:06:58,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:06:58,444 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 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 58 [2021-11-07 02:06:58,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:58,463 INFO L225 Difference]: With dead ends: 3161 [2021-11-07 02:06:58,464 INFO L226 Difference]: Without dead ends: 2368 [2021-11-07 02:06:58,466 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:06:58,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2368 states. [2021-11-07 02:06:58,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2368 to 810. [2021-11-07 02:06:58,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 804 states have (on average 1.7388059701492538) internal successors, (1398), 809 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:58,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1398 transitions. [2021-11-07 02:06:58,564 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1398 transitions. Word has length 58 [2021-11-07 02:06:58,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:58,565 INFO L470 AbstractCegarLoop]: Abstraction has 810 states and 1398 transitions. [2021-11-07 02:06:58,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 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 02:06:58,565 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1398 transitions. [2021-11-07 02:06:58,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 02:06:58,568 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:58,568 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] [2021-11-07 02:06:58,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:58,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:58,790 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:06:58,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:58,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1537446901, now seen corresponding path program 1 times [2021-11-07 02:06:58,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:58,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1123878339] [2021-11-07 02:06:58,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:58,793 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:58,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:58,795 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:58,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:06:59,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:59,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:06:59,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:59,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:59,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:59,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:59,748 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:59,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1123878339] [2021-11-07 02:06:59,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1123878339] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:59,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:59,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:06:59,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611114977] [2021-11-07 02:06:59,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:06:59,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:59,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:06:59,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:06:59,752 INFO L87 Difference]: Start difference. First operand 810 states and 1398 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:59,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:59,881 INFO L93 Difference]: Finished difference Result 1617 states and 2793 transitions. [2021-11-07 02:06:59,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:06:59,882 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-07 02:06:59,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:59,889 INFO L225 Difference]: With dead ends: 1617 [2021-11-07 02:06:59,889 INFO L226 Difference]: Without dead ends: 815 [2021-11-07 02:06:59,891 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:06:59,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2021-11-07 02:06:59,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 810. [2021-11-07 02:06:59,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 804 states have (on average 1.7350746268656716) internal successors, (1395), 809 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:59,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1395 transitions. [2021-11-07 02:06:59,958 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1395 transitions. Word has length 59 [2021-11-07 02:06:59,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:59,961 INFO L470 AbstractCegarLoop]: Abstraction has 810 states and 1395 transitions. [2021-11-07 02:06:59,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:59,961 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1395 transitions. [2021-11-07 02:06:59,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 02:06:59,965 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:59,965 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:59,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:00,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:00,184 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:07:00,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:00,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1288711424, now seen corresponding path program 1 times [2021-11-07 02:07:00,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:00,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1800577287] [2021-11-07 02:07:00,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:00,186 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:00,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:00,192 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:00,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:07:00,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:00,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:07:00,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:00,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:00,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:01,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:01,169 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:01,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1800577287] [2021-11-07 02:07:01,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1800577287] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:01,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:01,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:07:01,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159379305] [2021-11-07 02:07:01,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:07:01,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:01,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:07:01,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:07:01,175 INFO L87 Difference]: Start difference. First operand 810 states and 1395 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:01,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:01,610 INFO L93 Difference]: Finished difference Result 3148 states and 5446 transitions. [2021-11-07 02:07:01,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:07:01,611 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 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 60 [2021-11-07 02:07:01,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:01,630 INFO L225 Difference]: With dead ends: 3148 [2021-11-07 02:07:01,630 INFO L226 Difference]: Without dead ends: 2364 [2021-11-07 02:07:01,632 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:07:01,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2021-11-07 02:07:01,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 810. [2021-11-07 02:07:01,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 804 states have (on average 1.7313432835820894) internal successors, (1392), 809 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:01,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1392 transitions. [2021-11-07 02:07:01,726 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1392 transitions. Word has length 60 [2021-11-07 02:07:01,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:01,727 INFO L470 AbstractCegarLoop]: Abstraction has 810 states and 1392 transitions. [2021-11-07 02:07:01,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:01,728 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1392 transitions. [2021-11-07 02:07:01,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 02:07:01,730 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:01,730 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:01,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:01,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:01,944 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:07:01,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:01,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1796850085, now seen corresponding path program 1 times [2021-11-07 02:07:01,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:01,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [131030666] [2021-11-07 02:07:01,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:01,946 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:01,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:01,947 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:01,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:07:02,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:02,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:02,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:02,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:02,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:02,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:02,880 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:02,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [131030666] [2021-11-07 02:07:02,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [131030666] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:02,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:02,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:07:02,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042806451] [2021-11-07 02:07:02,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:07:02,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:02,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:07:02,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:07:02,882 INFO L87 Difference]: Start difference. First operand 810 states and 1392 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:03,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:03,038 INFO L93 Difference]: Finished difference Result 2121 states and 3641 transitions. [2021-11-07 02:07:03,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:07:03,039 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 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 62 [2021-11-07 02:07:03,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:03,051 INFO L225 Difference]: With dead ends: 2121 [2021-11-07 02:07:03,052 INFO L226 Difference]: Without dead ends: 1594 [2021-11-07 02:07:03,054 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:07:03,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2021-11-07 02:07:03,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1067. [2021-11-07 02:07:03,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1061 states have (on average 1.7577756833176248) internal successors, (1865), 1066 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:03,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1865 transitions. [2021-11-07 02:07:03,166 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1865 transitions. Word has length 62 [2021-11-07 02:07:03,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:03,167 INFO L470 AbstractCegarLoop]: Abstraction has 1067 states and 1865 transitions. [2021-11-07 02:07:03,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:03,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1865 transitions. [2021-11-07 02:07:03,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 02:07:03,170 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:03,170 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:03,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:03,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:03,389 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:07:03,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:03,389 INFO L85 PathProgramCache]: Analyzing trace with hash 957012788, now seen corresponding path program 1 times [2021-11-07 02:07:03,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:03,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [306214677] [2021-11-07 02:07:03,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:03,390 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:03,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:03,391 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:03,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:07:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:04,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:04,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:04,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:04,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:04,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:04,529 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:04,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [306214677] [2021-11-07 02:07:04,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [306214677] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:04,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:04,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:07:04,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33656253] [2021-11-07 02:07:04,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:04,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:04,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:04,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:04,532 INFO L87 Difference]: Start difference. First operand 1067 states and 1865 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:04,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:04,692 INFO L93 Difference]: Finished difference Result 2782 states and 4861 transitions. [2021-11-07 02:07:04,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:04,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 02:07:04,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:04,707 INFO L225 Difference]: With dead ends: 2782 [2021-11-07 02:07:04,708 INFO L226 Difference]: Without dead ends: 1799 [2021-11-07 02:07:04,711 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:04,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2021-11-07 02:07:04,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 1272. [2021-11-07 02:07:04,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1266 states have (on average 1.7701421800947867) internal successors, (2241), 1271 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:04,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 2241 transitions. [2021-11-07 02:07:04,849 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 2241 transitions. Word has length 74 [2021-11-07 02:07:04,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:04,851 INFO L470 AbstractCegarLoop]: Abstraction has 1272 states and 2241 transitions. [2021-11-07 02:07:04,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:04,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 2241 transitions. [2021-11-07 02:07:04,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 02:07:04,854 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:04,854 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:04,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:05,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:05,070 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:07:05,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:05,070 INFO L85 PathProgramCache]: Analyzing trace with hash -164172299, now seen corresponding path program 1 times [2021-11-07 02:07:05,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:05,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1029622870] [2021-11-07 02:07:05,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:05,071 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:05,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:05,078 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:05,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:07:05,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:05,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:05,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:05,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:05,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:06,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:06,147 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:06,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1029622870] [2021-11-07 02:07:06,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1029622870] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:06,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:06,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:07:06,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550089857] [2021-11-07 02:07:06,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:06,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:06,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:06,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:06,150 INFO L87 Difference]: Start difference. First operand 1272 states and 2241 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:06,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:06,343 INFO L93 Difference]: Finished difference Result 3429 states and 6054 transitions. [2021-11-07 02:07:06,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:06,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 02:07:06,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:06,360 INFO L225 Difference]: With dead ends: 3429 [2021-11-07 02:07:06,361 INFO L226 Difference]: Without dead ends: 2249 [2021-11-07 02:07:06,366 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:06,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2249 states. [2021-11-07 02:07:06,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2249 to 1722. [2021-11-07 02:07:06,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1722 states, 1716 states have (on average 1.7884615384615385) internal successors, (3069), 1721 states have internal predecessors, (3069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:06,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1722 states to 1722 states and 3069 transitions. [2021-11-07 02:07:06,548 INFO L78 Accepts]: Start accepts. Automaton has 1722 states and 3069 transitions. Word has length 75 [2021-11-07 02:07:06,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:06,550 INFO L470 AbstractCegarLoop]: Abstraction has 1722 states and 3069 transitions. [2021-11-07 02:07:06,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:06,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1722 states and 3069 transitions. [2021-11-07 02:07:06,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 02:07:06,563 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:06,563 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:06,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:06,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:06,783 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:07:06,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:06,784 INFO L85 PathProgramCache]: Analyzing trace with hash -456497594, now seen corresponding path program 1 times [2021-11-07 02:07:06,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:06,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1026262887] [2021-11-07 02:07:06,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:06,785 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:06,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:06,789 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:06,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:07:07,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:07,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:07,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:07,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:07,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:07,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:07,973 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:07,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1026262887] [2021-11-07 02:07:07,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1026262887] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:07,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:07,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:07:07,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917769431] [2021-11-07 02:07:07,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:07,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:07,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:07,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:07,975 INFO L87 Difference]: Start difference. First operand 1722 states and 3069 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:08,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:08,276 INFO L93 Difference]: Finished difference Result 4759 states and 8507 transitions. [2021-11-07 02:07:08,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:08,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 02:07:08,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:08,300 INFO L225 Difference]: With dead ends: 4759 [2021-11-07 02:07:08,301 INFO L226 Difference]: Without dead ends: 3137 [2021-11-07 02:07:08,304 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:08,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3137 states. [2021-11-07 02:07:08,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3137 to 2610. [2021-11-07 02:07:08,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2610 states, 2604 states have (on average 1.8064516129032258) internal successors, (4704), 2609 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:08,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2610 states to 2610 states and 4704 transitions. [2021-11-07 02:07:08,553 INFO L78 Accepts]: Start accepts. Automaton has 2610 states and 4704 transitions. Word has length 76 [2021-11-07 02:07:08,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:08,554 INFO L470 AbstractCegarLoop]: Abstraction has 2610 states and 4704 transitions. [2021-11-07 02:07:08,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:08,554 INFO L276 IsEmpty]: Start isEmpty. Operand 2610 states and 4704 transitions. [2021-11-07 02:07:08,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 02:07:08,561 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:08,562 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:08,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:08,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:08,776 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:07:08,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:08,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1860868294, now seen corresponding path program 1 times [2021-11-07 02:07:08,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:08,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1993213439] [2021-11-07 02:07:08,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:08,777 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:08,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:08,778 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:08,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:07:09,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:09,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:09,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:09,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:09,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:09,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:09,822 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:09,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1993213439] [2021-11-07 02:07:09,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1993213439] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:09,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:09,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:07:09,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852932806] [2021-11-07 02:07:09,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:09,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:09,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:09,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:09,825 INFO L87 Difference]: Start difference. First operand 2610 states and 4704 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:10,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:10,202 INFO L93 Difference]: Finished difference Result 7159 states and 12931 transitions. [2021-11-07 02:07:10,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:10,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 02:07:10,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:10,239 INFO L225 Difference]: With dead ends: 7159 [2021-11-07 02:07:10,240 INFO L226 Difference]: Without dead ends: 4683 [2021-11-07 02:07:10,244 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:10,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4683 states. [2021-11-07 02:07:10,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4683 to 4156. [2021-11-07 02:07:10,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4156 states, 4150 states have (on average 1.8190361445783132) internal successors, (7549), 4155 states have internal predecessors, (7549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:10,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4156 states to 4156 states and 7549 transitions. [2021-11-07 02:07:10,609 INFO L78 Accepts]: Start accepts. Automaton has 4156 states and 7549 transitions. Word has length 77 [2021-11-07 02:07:10,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:10,610 INFO L470 AbstractCegarLoop]: Abstraction has 4156 states and 7549 transitions. [2021-11-07 02:07:10,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:10,610 INFO L276 IsEmpty]: Start isEmpty. Operand 4156 states and 7549 transitions. [2021-11-07 02:07:10,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 02:07:10,619 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:10,620 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:10,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:10,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:10,836 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:07:10,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:10,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1442006155, now seen corresponding path program 1 times [2021-11-07 02:07:10,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:10,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [467381399] [2021-11-07 02:07:10,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:10,838 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:10,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:10,839 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:10,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:07:11,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:11,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:11,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:11,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:11,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:11,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:11,951 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:11,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [467381399] [2021-11-07 02:07:11,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [467381399] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:11,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:11,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:07:11,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750050404] [2021-11-07 02:07:11,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:11,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:11,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:11,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:11,954 INFO L87 Difference]: Start difference. First operand 4156 states and 7549 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:12,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:12,483 INFO L93 Difference]: Finished difference Result 11513 states and 20949 transitions. [2021-11-07 02:07:12,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:12,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-07 02:07:12,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:12,540 INFO L225 Difference]: With dead ends: 11513 [2021-11-07 02:07:12,540 INFO L226 Difference]: Without dead ends: 7525 [2021-11-07 02:07:12,548 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:12,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7525 states. [2021-11-07 02:07:13,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7525 to 6998. [2021-11-07 02:07:13,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6998 states, 6992 states have (on average 1.8269450800915332) internal successors, (12774), 6997 states have internal predecessors, (12774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:13,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6998 states to 6998 states and 12774 transitions. [2021-11-07 02:07:13,172 INFO L78 Accepts]: Start accepts. Automaton has 6998 states and 12774 transitions. Word has length 78 [2021-11-07 02:07:13,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:13,173 INFO L470 AbstractCegarLoop]: Abstraction has 6998 states and 12774 transitions. [2021-11-07 02:07:13,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:13,175 INFO L276 IsEmpty]: Start isEmpty. Operand 6998 states and 12774 transitions. [2021-11-07 02:07:13,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 02:07:13,272 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:13,272 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:13,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:13,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:13,484 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:07:13,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:13,484 INFO L85 PathProgramCache]: Analyzing trace with hash -503987435, now seen corresponding path program 1 times [2021-11-07 02:07:13,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:13,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [285283262] [2021-11-07 02:07:13,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:13,485 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:13,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:13,486 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:13,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:07:14,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:14,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:14,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:14,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:14,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:14,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:14,584 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:14,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [285283262] [2021-11-07 02:07:14,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [285283262] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:14,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:14,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:07:14,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782502177] [2021-11-07 02:07:14,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:14,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:14,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:14,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:14,586 INFO L87 Difference]: Start difference. First operand 6998 states and 12774 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:15,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:15,252 INFO L93 Difference]: Finished difference Result 20497 states and 37466 transitions. [2021-11-07 02:07:15,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:15,253 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 02:07:15,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:15,303 INFO L225 Difference]: With dead ends: 20497 [2021-11-07 02:07:15,303 INFO L226 Difference]: Without dead ends: 13671 [2021-11-07 02:07:15,317 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:15,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13671 states. [2021-11-07 02:07:16,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13671 to 13144. [2021-11-07 02:07:16,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13144 states, 13138 states have (on average 1.8309483939716853) internal successors, (24055), 13143 states have internal predecessors, (24055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:16,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13144 states to 13144 states and 24055 transitions. [2021-11-07 02:07:16,235 INFO L78 Accepts]: Start accepts. Automaton has 13144 states and 24055 transitions. Word has length 79 [2021-11-07 02:07:16,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:16,236 INFO L470 AbstractCegarLoop]: Abstraction has 13144 states and 24055 transitions. [2021-11-07 02:07:16,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:16,236 INFO L276 IsEmpty]: Start isEmpty. Operand 13144 states and 24055 transitions. [2021-11-07 02:07:16,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 02:07:16,253 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:16,254 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:16,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:16,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:16,474 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:07:16,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:16,474 INFO L85 PathProgramCache]: Analyzing trace with hash -106055931, now seen corresponding path program 1 times [2021-11-07 02:07:16,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:16,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1509881209] [2021-11-07 02:07:16,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:16,476 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:16,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:16,477 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:16,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:07:17,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:17,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:07:17,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:17,441 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:07:17,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:17,694 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:07:17,694 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:17,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1509881209] [2021-11-07 02:07:17,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1509881209] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:17,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:17,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:07:17,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509534370] [2021-11-07 02:07:17,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:07:17,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:17,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:07:17,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:07:17,697 INFO L87 Difference]: Start difference. First operand 13144 states and 24055 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:21,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:21,125 INFO L93 Difference]: Finished difference Result 32601 states and 59656 transitions. [2021-11-07 02:07:21,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:07:21,125 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 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 80 [2021-11-07 02:07:21,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:21,191 INFO L225 Difference]: With dead ends: 32601 [2021-11-07 02:07:21,191 INFO L226 Difference]: Without dead ends: 19750 [2021-11-07 02:07:21,212 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:07:21,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19750 states. [2021-11-07 02:07:22,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19750 to 13111. [2021-11-07 02:07:22,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13111 states, 13105 states have (on average 1.8254864555513164) internal successors, (23923), 13110 states have internal predecessors, (23923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:22,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13111 states to 13111 states and 23923 transitions. [2021-11-07 02:07:22,263 INFO L78 Accepts]: Start accepts. Automaton has 13111 states and 23923 transitions. Word has length 80 [2021-11-07 02:07:22,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:22,264 INFO L470 AbstractCegarLoop]: Abstraction has 13111 states and 23923 transitions. [2021-11-07 02:07:22,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:22,264 INFO L276 IsEmpty]: Start isEmpty. Operand 13111 states and 23923 transitions. [2021-11-07 02:07:22,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 02:07:22,277 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:22,277 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:22,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:22,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:22,497 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:07:22,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:22,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1427312934, now seen corresponding path program 1 times [2021-11-07 02:07:22,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:22,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1590633327] [2021-11-07 02:07:22,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:22,498 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:22,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:22,499 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:22,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:07:23,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:23,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:23,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:23,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:23,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:24,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:24,029 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:24,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1590633327] [2021-11-07 02:07:24,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1590633327] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:24,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:24,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:07:24,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416064829] [2021-11-07 02:07:24,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:24,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:24,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:24,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:24,031 INFO L87 Difference]: Start difference. First operand 13111 states and 23923 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:25,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:25,256 INFO L93 Difference]: Finished difference Result 38540 states and 70396 transitions. [2021-11-07 02:07:25,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:25,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2021-11-07 02:07:25,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:25,327 INFO L225 Difference]: With dead ends: 38540 [2021-11-07 02:07:25,327 INFO L226 Difference]: Without dead ends: 25608 [2021-11-07 02:07:25,346 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:25,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25608 states. [2021-11-07 02:07:26,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25608 to 25081. [2021-11-07 02:07:26,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25081 states, 25075 states have (on average 1.826999002991027) internal successors, (45812), 25080 states have internal predecessors, (45812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:26,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25081 states to 25081 states and 45812 transitions. [2021-11-07 02:07:26,662 INFO L78 Accepts]: Start accepts. Automaton has 25081 states and 45812 transitions. Word has length 80 [2021-11-07 02:07:26,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:26,663 INFO L470 AbstractCegarLoop]: Abstraction has 25081 states and 45812 transitions. [2021-11-07 02:07:26,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:26,663 INFO L276 IsEmpty]: Start isEmpty. Operand 25081 states and 45812 transitions. [2021-11-07 02:07:26,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 02:07:26,683 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:26,683 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:26,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:26,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:26,900 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:07:26,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:26,900 INFO L85 PathProgramCache]: Analyzing trace with hash -40964589, now seen corresponding path program 1 times [2021-11-07 02:07:26,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:26,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [655023321] [2021-11-07 02:07:26,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:26,901 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:26,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:26,903 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:26,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:07:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:27,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:27,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:27,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:27,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:28,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:28,243 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:28,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [655023321] [2021-11-07 02:07:28,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [655023321] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:28,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:28,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:07:28,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088729336] [2021-11-07 02:07:28,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:28,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:28,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:28,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:28,246 INFO L87 Difference]: Start difference. First operand 25081 states and 45812 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:30,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:30,677 INFO L93 Difference]: Finished difference Result 69089 states and 125799 transitions. [2021-11-07 02:07:30,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:30,678 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-11-07 02:07:30,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:30,780 INFO L225 Difference]: With dead ends: 69089 [2021-11-07 02:07:30,781 INFO L226 Difference]: Without dead ends: 44234 [2021-11-07 02:07:30,837 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:30,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44234 states. [2021-11-07 02:07:33,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44234 to 43707. [2021-11-07 02:07:33,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43707 states, 43701 states have (on average 1.8157250406169194) internal successors, (79349), 43706 states have internal predecessors, (79349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:33,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43707 states to 43707 states and 79349 transitions. [2021-11-07 02:07:33,474 INFO L78 Accepts]: Start accepts. Automaton has 43707 states and 79349 transitions. Word has length 81 [2021-11-07 02:07:33,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:33,475 INFO L470 AbstractCegarLoop]: Abstraction has 43707 states and 79349 transitions. [2021-11-07 02:07:33,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:33,475 INFO L276 IsEmpty]: Start isEmpty. Operand 43707 states and 79349 transitions. [2021-11-07 02:07:33,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 02:07:33,495 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:33,495 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:33,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:33,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:33,708 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:07:33,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:33,708 INFO L85 PathProgramCache]: Analyzing trace with hash 537781887, now seen corresponding path program 1 times [2021-11-07 02:07:33,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:33,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [842831778] [2021-11-07 02:07:33,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:33,709 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:33,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:33,710 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:33,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:07:34,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:34,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:07:34,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:34,683 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:07:34,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:34,903 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:07:34,903 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:34,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [842831778] [2021-11-07 02:07:34,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [842831778] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:34,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:34,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:07:34,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009732499] [2021-11-07 02:07:34,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:07:34,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:34,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:07:34,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:07:34,905 INFO L87 Difference]: Start difference. First operand 43707 states and 79349 transitions. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:42,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:42,233 INFO L93 Difference]: Finished difference Result 170108 states and 308718 transitions. [2021-11-07 02:07:42,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:07:42,234 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 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 82 [2021-11-07 02:07:42,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:42,488 INFO L225 Difference]: With dead ends: 170108 [2021-11-07 02:07:42,488 INFO L226 Difference]: Without dead ends: 126693 [2021-11-07 02:07:42,528 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:07:42,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126693 states. [2021-11-07 02:07:45,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126693 to 43449. [2021-11-07 02:07:45,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43449 states, 43443 states have (on average 1.8027530327095274) internal successors, (78317), 43448 states have internal predecessors, (78317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:45,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43449 states to 43449 states and 78317 transitions. [2021-11-07 02:07:45,618 INFO L78 Accepts]: Start accepts. Automaton has 43449 states and 78317 transitions. Word has length 82 [2021-11-07 02:07:45,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:45,618 INFO L470 AbstractCegarLoop]: Abstraction has 43449 states and 78317 transitions. [2021-11-07 02:07:45,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:45,619 INFO L276 IsEmpty]: Start isEmpty. Operand 43449 states and 78317 transitions. [2021-11-07 02:07:45,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 02:07:45,628 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:45,629 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:45,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-07 02:07:45,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:45,844 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:07:45,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:45,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1431788767, now seen corresponding path program 1 times [2021-11-07 02:07:45,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:45,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1295796579] [2021-11-07 02:07:45,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:45,845 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:45,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:45,847 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:45,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:07:46,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:46,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:46,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:46,755 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:46,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:46,930 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:46,931 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:46,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1295796579] [2021-11-07 02:07:46,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1295796579] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:46,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:46,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:07:46,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563377083] [2021-11-07 02:07:46,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:07:46,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:46,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:07:46,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:07:46,933 INFO L87 Difference]: Start difference. First operand 43449 states and 78317 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:49,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:49,039 INFO L93 Difference]: Finished difference Result 87127 states and 157019 transitions. [2021-11-07 02:07:49,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:49,040 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 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 82 [2021-11-07 02:07:49,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:49,100 INFO L225 Difference]: With dead ends: 87127 [2021-11-07 02:07:49,100 INFO L226 Difference]: Without dead ends: 43976 [2021-11-07 02:07:49,124 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:07:49,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43976 states. [2021-11-07 02:07:51,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43976 to 43449. [2021-11-07 02:07:51,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43449 states, 43443 states have (on average 1.7998066431876252) internal successors, (78189), 43448 states have internal predecessors, (78189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:51,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43449 states to 43449 states and 78189 transitions. [2021-11-07 02:07:51,193 INFO L78 Accepts]: Start accepts. Automaton has 43449 states and 78189 transitions. Word has length 82 [2021-11-07 02:07:51,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:51,194 INFO L470 AbstractCegarLoop]: Abstraction has 43449 states and 78189 transitions. [2021-11-07 02:07:51,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:51,194 INFO L276 IsEmpty]: Start isEmpty. Operand 43449 states and 78189 transitions. [2021-11-07 02:07:51,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 02:07:51,206 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:51,206 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:51,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:51,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:51,407 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:07:51,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:51,407 INFO L85 PathProgramCache]: Analyzing trace with hash 111663252, now seen corresponding path program 1 times [2021-11-07 02:07:51,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:51,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1408076095] [2021-11-07 02:07:51,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:51,408 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:51,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:51,408 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:51,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:07:52,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:52,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:52,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:52,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:52,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:52,523 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 02:07:52,523 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:52,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1408076095] [2021-11-07 02:07:52,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1408076095] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:52,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:52,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:07:52,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366106528] [2021-11-07 02:07:52,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:52,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:52,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:52,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:52,528 INFO L87 Difference]: Start difference. First operand 43449 states and 78189 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:55,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:55,661 INFO L93 Difference]: Finished difference Result 121857 states and 219045 transitions. [2021-11-07 02:07:55,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:55,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 02:07:55,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:55,778 INFO L225 Difference]: With dead ends: 121857 [2021-11-07 02:07:55,778 INFO L226 Difference]: Without dead ends: 78666 [2021-11-07 02:07:55,804 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:55,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78666 states. [2021-11-07 02:07:59,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78666 to 78139. [2021-11-07 02:07:59,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78139 states, 78133 states have (on average 1.793633931885375) internal successors, (140142), 78138 states have internal predecessors, (140142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:59,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78139 states to 78139 states and 140142 transitions. [2021-11-07 02:07:59,813 INFO L78 Accepts]: Start accepts. Automaton has 78139 states and 140142 transitions. Word has length 82 [2021-11-07 02:07:59,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:59,814 INFO L470 AbstractCegarLoop]: Abstraction has 78139 states and 140142 transitions. [2021-11-07 02:07:59,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:59,814 INFO L276 IsEmpty]: Start isEmpty. Operand 78139 states and 140142 transitions. [2021-11-07 02:07:59,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 02:07:59,826 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:59,827 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:59,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-07 02:08:00,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:00,027 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:08:00,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:00,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1834920603, now seen corresponding path program 1 times [2021-11-07 02:08:00,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:00,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864177909] [2021-11-07 02:08:00,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:00,028 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:00,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:00,029 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:00,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:08:00,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:00,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:08:00,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:01,029 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:01,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:01,274 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:01,274 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:01,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864177909] [2021-11-07 02:08:01,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864177909] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:01,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [735476276] [2021-11-07 02:08:01,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:01,275 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:01,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:01,281 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:01,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_112034d7-7ab2-47d6-a5dc-b71edb8f6273/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process