./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec6_product26.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_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/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_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec6_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/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_7b783815-d316-438a-bbdf-79205de5613a/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 e80e5ec358c01b9328a945ffeac50362818d778d67430de128e75eb1cc0d9bc1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:55:10,908 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:55:10,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:55:10,958 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:55:10,959 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:55:10,963 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:55:10,965 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:55:10,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:55:10,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:55:10,977 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:55:10,979 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:55:10,981 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:55:10,981 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:55:10,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:55:10,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:55:10,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:55:10,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:55:10,995 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:55:10,997 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:55:11,006 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:55:11,009 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:55:11,010 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:55:11,014 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:55:11,015 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:55:11,024 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:55:11,025 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:55:11,025 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:55:11,027 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:55:11,028 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:55:11,029 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:55:11,030 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:55:11,031 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:55:11,033 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:55:11,035 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:55:11,036 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:55:11,037 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:55:11,038 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:55:11,038 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:55:11,038 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:55:11,039 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:55:11,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:55:11,041 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:55:11,094 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:55:11,095 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:55:11,096 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:55:11,097 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:55:11,097 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:55:11,097 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:55:11,097 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:55:11,098 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:55:11,098 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:55:11,098 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:55:11,099 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:55:11,099 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:55:11,100 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:55:11,100 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:55:11,100 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:55:11,101 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:55:11,101 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:55:11,102 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:55:11,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:55:11,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:55:11,102 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:55:11,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:55:11,103 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:55:11,103 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:55:11,103 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:55:11,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:55:11,104 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:55:11,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:55:11,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:55:11,106 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:55:11,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:55:11,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:55:11,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:55:11,107 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:55:11,107 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:55:11,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:55:11,108 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:55:11,108 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:55:11,108 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:55:11,108 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_7b783815-d316-438a-bbdf-79205de5613a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e80e5ec358c01b9328a945ffeac50362818d778d67430de128e75eb1cc0d9bc1 [2021-11-07 01:55:11,390 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:55:11,420 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:55:11,422 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:55:11,424 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:55:11,424 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:55:11,425 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec6_product26.cil.c [2021-11-07 01:55:11,508 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/data/b44b075e9/33439941d46c432daab202083f20a820/FLAG063a8fcd2 [2021-11-07 01:55:12,098 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:55:12,099 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/sv-benchmarks/c/product-lines/email_spec6_product26.cil.c [2021-11-07 01:55:12,129 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/data/b44b075e9/33439941d46c432daab202083f20a820/FLAG063a8fcd2 [2021-11-07 01:55:12,344 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/data/b44b075e9/33439941d46c432daab202083f20a820 [2021-11-07 01:55:12,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:55:12,347 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:55:12,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:55:12,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:55:12,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:55:12,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:55:12" (1/1) ... [2021-11-07 01:55:12,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17069b3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:12, skipping insertion in model container [2021-11-07 01:55:12,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:55:12" (1/1) ... [2021-11-07 01:55:12,373 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:55:12,472 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:55:13,016 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_7b783815-d316-438a-bbdf-79205de5613a/sv-benchmarks/c/product-lines/email_spec6_product26.cil.c[51398,51411] [2021-11-07 01:55:13,099 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:55:13,118 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:55:13,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@458cfd7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:13, skipping insertion in model container [2021-11-07 01:55:13,119 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:55:13,120 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:55:13,122 INFO L168 Benchmark]: Toolchain (without parser) took 773.50 ms. Allocated memory was 83.9 MB in the beginning and 100.7 MB in the end (delta: 16.8 MB). Free memory was 47.8 MB in the beginning and 62.9 MB in the end (delta: -15.2 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:55:13,124 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 83.9 MB. Free memory was 52.8 MB in the beginning and 52.7 MB in the end (delta: 26.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:55:13,126 INFO L168 Benchmark]: CACSL2BoogieTranslator took 757.86 ms. Allocated memory was 83.9 MB in the beginning and 100.7 MB in the end (delta: 16.8 MB). Free memory was 47.6 MB in the beginning and 62.9 MB in the end (delta: -15.4 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:55:13,129 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 83.9 MB. Free memory was 52.8 MB in the beginning and 52.7 MB in the end (delta: 26.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 757.86 ms. Allocated memory was 83.9 MB in the beginning and 100.7 MB in the end (delta: 16.8 MB). Free memory was 47.6 MB in the beginning and 62.9 MB in the end (delta: -15.4 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 77]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/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_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec6_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/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_7b783815-d316-438a-bbdf-79205de5613a/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 e80e5ec358c01b9328a945ffeac50362818d778d67430de128e75eb1cc0d9bc1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:55:15,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:55:15,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:55:15,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:55:15,542 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:55:15,546 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:55:15,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:55:15,557 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:55:15,561 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:55:15,569 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:55:15,570 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:55:15,572 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:55:15,573 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:55:15,575 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:55:15,577 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:55:15,580 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:55:15,582 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:55:15,584 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:55:15,588 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:55:15,594 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:55:15,597 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:55:15,599 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:55:15,602 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:55:15,605 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:55:15,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:55:15,616 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:55:15,617 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:55:15,619 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:55:15,620 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:55:15,621 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:55:15,621 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:55:15,622 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:55:15,625 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:55:15,626 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:55:15,627 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:55:15,627 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:55:15,629 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:55:15,629 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:55:15,629 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:55:15,631 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:55:15,632 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:55:15,633 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:55:15,678 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:55:15,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:55:15,680 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:55:15,680 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:55:15,681 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:55:15,681 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:55:15,681 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:55:15,681 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:55:15,681 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:55:15,683 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:55:15,684 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:55:15,684 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:55:15,685 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:55:15,685 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:55:15,685 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:55:15,685 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:55:15,686 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:55:15,686 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:55:15,686 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:55:15,686 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:55:15,687 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:55:15,687 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:55:15,687 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:55:15,687 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:55:15,687 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:55:15,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:55:15,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:55:15,688 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:55:15,688 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:55:15,689 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:55:15,689 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:55:15,689 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:55:15,689 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:55:15,690 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:55:15,690 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:55:15,690 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_7b783815-d316-438a-bbdf-79205de5613a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e80e5ec358c01b9328a945ffeac50362818d778d67430de128e75eb1cc0d9bc1 [2021-11-07 01:55:16,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:55:16,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:55:16,108 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:55:16,109 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:55:16,110 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:55:16,111 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec6_product26.cil.c [2021-11-07 01:55:16,168 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/data/660625f05/f7f7764b435e4eb491e06c0cfa3e0320/FLAG15c83caaf [2021-11-07 01:55:16,885 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:55:16,886 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/sv-benchmarks/c/product-lines/email_spec6_product26.cil.c [2021-11-07 01:55:16,920 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/data/660625f05/f7f7764b435e4eb491e06c0cfa3e0320/FLAG15c83caaf [2021-11-07 01:55:17,052 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/data/660625f05/f7f7764b435e4eb491e06c0cfa3e0320 [2021-11-07 01:55:17,055 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:55:17,056 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:55:17,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:55:17,059 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:55:17,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:55:17,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:55:17" (1/1) ... [2021-11-07 01:55:17,064 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a01e4f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:17, skipping insertion in model container [2021-11-07 01:55:17,064 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:55:17" (1/1) ... [2021-11-07 01:55:17,072 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:55:17,176 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:55:17,742 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_7b783815-d316-438a-bbdf-79205de5613a/sv-benchmarks/c/product-lines/email_spec6_product26.cil.c[51398,51411] [2021-11-07 01:55:17,793 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:55:17,809 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:55:17,832 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:55:17,960 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_7b783815-d316-438a-bbdf-79205de5613a/sv-benchmarks/c/product-lines/email_spec6_product26.cil.c[51398,51411] [2021-11-07 01:55:17,994 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:55:18,004 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:55:18,107 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_7b783815-d316-438a-bbdf-79205de5613a/sv-benchmarks/c/product-lines/email_spec6_product26.cil.c[51398,51411] [2021-11-07 01:55:18,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:55:18,184 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:55:18,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:18 WrapperNode [2021-11-07 01:55:18,185 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:55:18,186 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:55:18,186 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:55:18,186 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:55:18,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:18" (1/1) ... [2021-11-07 01:55:18,247 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:18" (1/1) ... [2021-11-07 01:55:18,422 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:55:18,423 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:55:18,423 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:55:18,423 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:55:18,432 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:18" (1/1) ... [2021-11-07 01:55:18,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:18" (1/1) ... [2021-11-07 01:55:18,480 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:18" (1/1) ... [2021-11-07 01:55:18,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:18" (1/1) ... [2021-11-07 01:55:18,563 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:18" (1/1) ... [2021-11-07 01:55:18,606 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:18" (1/1) ... [2021-11-07 01:55:18,616 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:18" (1/1) ... [2021-11-07 01:55:18,636 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:55:18,637 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:55:18,637 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:55:18,637 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:55:18,638 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:18" (1/1) ... [2021-11-07 01:55:18,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:55:18,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:55:18,683 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:55:18,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:55:18,739 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:55:18,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:55:18,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:55:18,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:55:18,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:55:25,238 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:55:25,238 INFO L299 CfgBuilder]: Removed 749 assume(true) statements. [2021-11-07 01:55:25,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:55:25 BoogieIcfgContainer [2021-11-07 01:55:25,243 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:55:25,245 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:55:25,246 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:55:25,248 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:55:25,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:55:17" (1/3) ... [2021-11-07 01:55:25,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ea3f632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:55:25, skipping insertion in model container [2021-11-07 01:55:25,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:18" (2/3) ... [2021-11-07 01:55:25,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ea3f632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:55:25, skipping insertion in model container [2021-11-07 01:55:25,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:55:25" (3/3) ... [2021-11-07 01:55:25,252 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec6_product26.cil.c [2021-11-07 01:55:25,258 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:55:25,259 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:55:25,332 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:55:25,341 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:55:25,342 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:55:25,392 INFO L276 IsEmpty]: Start isEmpty. Operand has 1080 states, 1073 states have (on average 1.7287977632805218) internal successors, (1855), 1079 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:25,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:55:25,432 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:25,433 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:55:25,434 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:25,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:25,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1497011974, now seen corresponding path program 1 times [2021-11-07 01:55:25,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:25,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1443545254] [2021-11-07 01:55:25,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:25,458 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:25,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:25,465 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:25,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:55:26,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:26,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:55:26,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:26,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:26,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:26,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:26,406 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:26,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1443545254] [2021-11-07 01:55:26,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1443545254] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:26,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:26,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:55:26,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615759144] [2021-11-07 01:55:26,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:55:26,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:26,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:55:26,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:55:26,443 INFO L87 Difference]: Start difference. First operand has 1080 states, 1073 states have (on average 1.7287977632805218) internal successors, (1855), 1079 states have internal predecessors, (1855), 0 states have call successors, (0), 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 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:26,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:26,559 INFO L93 Difference]: Finished difference Result 1871 states and 3180 transitions. [2021-11-07 01:55:26,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:55:26,561 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-07 01:55:26,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:26,593 INFO L225 Difference]: With dead ends: 1871 [2021-11-07 01:55:26,593 INFO L226 Difference]: Without dead ends: 942 [2021-11-07 01:55:26,603 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:55:26,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2021-11-07 01:55:26,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 942. [2021-11-07 01:55:26,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 936 states have (on average 1.7286324786324787) internal successors, (1618), 941 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:26,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 1618 transitions. [2021-11-07 01:55:26,743 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 1618 transitions. Word has length 53 [2021-11-07 01:55:26,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:26,744 INFO L470 AbstractCegarLoop]: Abstraction has 942 states and 1618 transitions. [2021-11-07 01:55:26,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:26,744 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 1618 transitions. [2021-11-07 01:55:26,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 01:55:26,748 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:26,748 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:55:26,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 01:55:26,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:26,958 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:26,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:26,959 INFO L85 PathProgramCache]: Analyzing trace with hash -64164497, now seen corresponding path program 1 times [2021-11-07 01:55:26,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:26,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1270197177] [2021-11-07 01:55:26,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:26,961 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:26,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:26,963 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:26,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:55:27,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:27,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:55:27,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:27,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:27,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:27,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:27,849 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:27,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1270197177] [2021-11-07 01:55:27,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1270197177] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:27,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:27,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:55:27,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562838203] [2021-11-07 01:55:27,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:55:27,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:27,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:55:27,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:55:27,858 INFO L87 Difference]: Start difference. First operand 942 states and 1618 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:28,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:28,027 INFO L93 Difference]: Finished difference Result 2796 states and 4806 transitions. [2021-11-07 01:55:28,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:55:28,028 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 01:55:28,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:28,041 INFO L225 Difference]: With dead ends: 2796 [2021-11-07 01:55:28,042 INFO L226 Difference]: Without dead ends: 1869 [2021-11-07 01:55:28,044 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:55:28,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2021-11-07 01:55:28,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 941. [2021-11-07 01:55:28,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 935 states have (on average 1.7251336898395722) internal successors, (1613), 940 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:28,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 1613 transitions. [2021-11-07 01:55:28,106 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 1613 transitions. Word has length 54 [2021-11-07 01:55:28,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:28,106 INFO L470 AbstractCegarLoop]: Abstraction has 941 states and 1613 transitions. [2021-11-07 01:55:28,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:28,107 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 1613 transitions. [2021-11-07 01:55:28,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 01:55:28,109 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:28,110 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 01:55:28,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:28,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:28,323 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:28,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:28,324 INFO L85 PathProgramCache]: Analyzing trace with hash -723617335, now seen corresponding path program 1 times [2021-11-07 01:55:28,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:28,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [717052941] [2021-11-07 01:55:28,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:28,326 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:28,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:28,333 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:28,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:55:28,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:28,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:55:28,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:28,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:28,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:29,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:29,203 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:29,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [717052941] [2021-11-07 01:55:29,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [717052941] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:29,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:29,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:55:29,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832077652] [2021-11-07 01:55:29,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:55:29,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:29,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:55:29,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:55:29,206 INFO L87 Difference]: Start difference. First operand 941 states and 1613 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:29,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:29,636 INFO L93 Difference]: Finished difference Result 3681 states and 6314 transitions. [2021-11-07 01:55:29,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:55:29,637 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 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 01:55:29,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:29,655 INFO L225 Difference]: With dead ends: 3681 [2021-11-07 01:55:29,655 INFO L226 Difference]: Without dead ends: 2758 [2021-11-07 01:55:29,658 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:55:29,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2758 states. [2021-11-07 01:55:29,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2758 to 940. [2021-11-07 01:55:29,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 934 states have (on average 1.722698072805139) internal successors, (1609), 939 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:29,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1609 transitions. [2021-11-07 01:55:29,734 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1609 transitions. Word has length 56 [2021-11-07 01:55:29,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:29,735 INFO L470 AbstractCegarLoop]: Abstraction has 940 states and 1609 transitions. [2021-11-07 01:55:29,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:29,737 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1609 transitions. [2021-11-07 01:55:29,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:55:29,739 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:29,739 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:55:29,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:29,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:29,966 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:29,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:29,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1940064790, now seen corresponding path program 1 times [2021-11-07 01:55:29,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:29,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145085475] [2021-11-07 01:55:29,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:29,968 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:29,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:29,972 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:29,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:55:30,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:30,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:55:30,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:30,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:30,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:30,761 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 01:55:30,761 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:30,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145085475] [2021-11-07 01:55:30,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145085475] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:30,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:30,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:55:30,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107398051] [2021-11-07 01:55:30,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:55:30,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:30,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:55:30,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:55:30,765 INFO L87 Difference]: Start difference. First operand 940 states and 1609 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:30,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:30,865 INFO L93 Difference]: Finished difference Result 1877 states and 3215 transitions. [2021-11-07 01:55:30,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:55:30,865 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 01:55:30,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:30,872 INFO L225 Difference]: With dead ends: 1877 [2021-11-07 01:55:30,872 INFO L226 Difference]: Without dead ends: 945 [2021-11-07 01:55:30,874 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:55:30,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-11-07 01:55:30,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 940. [2021-11-07 01:55:30,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 934 states have (on average 1.7194860813704498) internal successors, (1606), 939 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:30,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1606 transitions. [2021-11-07 01:55:30,949 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1606 transitions. Word has length 57 [2021-11-07 01:55:30,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:30,950 INFO L470 AbstractCegarLoop]: Abstraction has 940 states and 1606 transitions. [2021-11-07 01:55:30,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:30,950 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1606 transitions. [2021-11-07 01:55:30,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:55:30,952 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:30,952 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 01:55:30,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:31,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:31,167 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:31,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:31,168 INFO L85 PathProgramCache]: Analyzing trace with hash 918130657, now seen corresponding path program 1 times [2021-11-07 01:55:31,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:31,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [367901760] [2021-11-07 01:55:31,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:31,170 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:31,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:31,171 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:31,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:55:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:31,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:55:31,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:31,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:31,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:32,042 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:32,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [367901760] [2021-11-07 01:55:32,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [367901760] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:32,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:32,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:55:32,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723158103] [2021-11-07 01:55:32,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:55:32,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:32,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:55:32,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:55:32,045 INFO L87 Difference]: Start difference. First operand 940 states and 1606 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:32,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:32,433 INFO L93 Difference]: Finished difference Result 3668 states and 6290 transitions. [2021-11-07 01:55:32,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:55:32,433 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 01:55:32,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:32,451 INFO L225 Difference]: With dead ends: 3668 [2021-11-07 01:55:32,451 INFO L226 Difference]: Without dead ends: 2754 [2021-11-07 01:55:32,454 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:55:32,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2754 states. [2021-11-07 01:55:32,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2754 to 940. [2021-11-07 01:55:32,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 934 states have (on average 1.7162740899357602) internal successors, (1603), 939 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:32,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1603 transitions. [2021-11-07 01:55:32,562 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1603 transitions. Word has length 58 [2021-11-07 01:55:32,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:32,563 INFO L470 AbstractCegarLoop]: Abstraction has 940 states and 1603 transitions. [2021-11-07 01:55:32,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:32,563 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1603 transitions. [2021-11-07 01:55:32,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:55:32,565 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:32,565 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 01:55:32,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:32,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:32,787 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:32,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:32,788 INFO L85 PathProgramCache]: Analyzing trace with hash -852958266, now seen corresponding path program 1 times [2021-11-07 01:55:32,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:32,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2108370411] [2021-11-07 01:55:32,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:32,789 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:32,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:32,790 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:32,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:55:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:33,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:55:33,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:33,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:33,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:33,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:33,565 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:33,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2108370411] [2021-11-07 01:55:33,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2108370411] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:33,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:33,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:55:33,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138983294] [2021-11-07 01:55:33,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:55:33,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:33,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:55:33,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:55:33,567 INFO L87 Difference]: Start difference. First operand 940 states and 1603 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:33,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:33,737 INFO L93 Difference]: Finished difference Result 2507 states and 4267 transitions. [2021-11-07 01:55:33,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:55:33,738 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 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 60 [2021-11-07 01:55:33,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:33,750 INFO L225 Difference]: With dead ends: 2507 [2021-11-07 01:55:33,750 INFO L226 Difference]: Without dead ends: 1854 [2021-11-07 01:55:33,752 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:55:33,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2021-11-07 01:55:33,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1201. [2021-11-07 01:55:33,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1195 states have (on average 1.7430962343096235) internal successors, (2083), 1200 states have internal predecessors, (2083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:33,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 2083 transitions. [2021-11-07 01:55:33,854 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 2083 transitions. Word has length 60 [2021-11-07 01:55:33,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:33,855 INFO L470 AbstractCegarLoop]: Abstraction has 1201 states and 2083 transitions. [2021-11-07 01:55:33,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:33,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 2083 transitions. [2021-11-07 01:55:33,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:55:33,858 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:33,858 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:55:33,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:34,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:34,079 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:34,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:34,080 INFO L85 PathProgramCache]: Analyzing trace with hash -603321291, now seen corresponding path program 1 times [2021-11-07 01:55:34,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:34,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1130212778] [2021-11-07 01:55:34,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:34,081 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:34,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:34,082 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:34,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:55:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:34,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:55:34,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:34,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:34,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:34,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:34,979 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:34,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1130212778] [2021-11-07 01:55:34,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1130212778] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:34,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:34,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:55:34,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989016895] [2021-11-07 01:55:34,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:55:34,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:34,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:55:34,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:55:34,982 INFO L87 Difference]: Start difference. First operand 1201 states and 2083 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:35,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:35,166 INFO L93 Difference]: Finished difference Result 3180 states and 5508 transitions. [2021-11-07 01:55:35,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:55:35,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:55:35,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:35,180 INFO L225 Difference]: With dead ends: 3180 [2021-11-07 01:55:35,180 INFO L226 Difference]: Without dead ends: 2063 [2021-11-07 01:55:35,184 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:55:35,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-11-07 01:55:35,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1410. [2021-11-07 01:55:35,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1404 states have (on average 1.7564102564102564) internal successors, (2466), 1409 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:35,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 2466 transitions. [2021-11-07 01:55:35,335 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 2466 transitions. Word has length 72 [2021-11-07 01:55:35,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:35,337 INFO L470 AbstractCegarLoop]: Abstraction has 1410 states and 2466 transitions. [2021-11-07 01:55:35,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:35,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 2466 transitions. [2021-11-07 01:55:35,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:55:35,340 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:35,340 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] [2021-11-07 01:55:35,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:35,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:35,554 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:35,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:35,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1024599242, now seen corresponding path program 1 times [2021-11-07 01:55:35,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:35,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [884245126] [2021-11-07 01:55:35,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:35,555 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:35,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:35,556 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:35,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:55:36,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:36,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:55:36,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:36,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:36,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:36,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:36,406 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:36,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [884245126] [2021-11-07 01:55:36,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [884245126] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:36,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:36,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:55:36,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936048220] [2021-11-07 01:55:36,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:55:36,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:36,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:55:36,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:55:36,409 INFO L87 Difference]: Start difference. First operand 1410 states and 2466 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:36,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:36,622 INFO L93 Difference]: Finished difference Result 3839 states and 6722 transitions. [2021-11-07 01:55:36,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:55:36,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-11-07 01:55:36,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:36,639 INFO L225 Difference]: With dead ends: 3839 [2021-11-07 01:55:36,639 INFO L226 Difference]: Without dead ends: 2521 [2021-11-07 01:55:36,643 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:55:36,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2021-11-07 01:55:36,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 1868. [2021-11-07 01:55:36,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1862 states have (on average 1.7765843179377014) internal successors, (3308), 1867 states have internal predecessors, (3308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:36,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 3308 transitions. [2021-11-07 01:55:36,788 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 3308 transitions. Word has length 73 [2021-11-07 01:55:36,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:36,789 INFO L470 AbstractCegarLoop]: Abstraction has 1868 states and 3308 transitions. [2021-11-07 01:55:36,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:36,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 3308 transitions. [2021-11-07 01:55:36,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:55:36,798 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:36,798 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 01:55:36,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:37,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:37,014 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:37,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:37,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1442132935, now seen corresponding path program 1 times [2021-11-07 01:55:37,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:37,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [580634133] [2021-11-07 01:55:37,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:37,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:37,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:37,017 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:37,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:55:37,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:37,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:55:37,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:37,720 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 01:55:37,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:37,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:37,903 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:37,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [580634133] [2021-11-07 01:55:37,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [580634133] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:37,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:37,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:55:37,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968591315] [2021-11-07 01:55:37,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:55:37,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:37,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:55:37,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:55:37,906 INFO L87 Difference]: Start difference. First operand 1868 states and 3308 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 01:55:38,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:38,123 INFO L93 Difference]: Finished difference Result 5193 states and 9217 transitions. [2021-11-07 01:55:38,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:55:38,124 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 01:55:38,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:38,146 INFO L225 Difference]: With dead ends: 5193 [2021-11-07 01:55:38,146 INFO L226 Difference]: Without dead ends: 3425 [2021-11-07 01:55:38,150 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 01:55:38,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3425 states. [2021-11-07 01:55:38,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3425 to 2772. [2021-11-07 01:55:38,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2772 states, 2766 states have (on average 1.797180043383948) internal successors, (4971), 2771 states have internal predecessors, (4971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:38,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2772 states to 2772 states and 4971 transitions. [2021-11-07 01:55:38,360 INFO L78 Accepts]: Start accepts. Automaton has 2772 states and 4971 transitions. Word has length 74 [2021-11-07 01:55:38,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:38,361 INFO L470 AbstractCegarLoop]: Abstraction has 2772 states and 4971 transitions. [2021-11-07 01:55:38,361 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 01:55:38,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2772 states and 4971 transitions. [2021-11-07 01:55:38,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:55:38,367 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:38,367 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 01:55:38,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:38,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:38,583 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:38,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:38,584 INFO L85 PathProgramCache]: Analyzing trace with hash 394266183, now seen corresponding path program 1 times [2021-11-07 01:55:38,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:38,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1904965839] [2021-11-07 01:55:38,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:38,584 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:38,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:38,585 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:38,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:55:39,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:39,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:55:39,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:39,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:39,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:39,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:39,514 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:39,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1904965839] [2021-11-07 01:55:39,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1904965839] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:39,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:39,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:55:39,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413102886] [2021-11-07 01:55:39,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:55:39,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:39,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:55:39,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:55:39,516 INFO L87 Difference]: Start difference. First operand 2772 states and 4971 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 01:55:39,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:39,829 INFO L93 Difference]: Finished difference Result 7641 states and 13725 transitions. [2021-11-07 01:55:39,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:55:39,830 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 01:55:39,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:39,876 INFO L225 Difference]: With dead ends: 7641 [2021-11-07 01:55:39,876 INFO L226 Difference]: Without dead ends: 5003 [2021-11-07 01:55:39,881 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 01:55:39,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5003 states. [2021-11-07 01:55:40,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5003 to 4350. [2021-11-07 01:55:40,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4350 states, 4344 states have (on average 1.8121546961325967) internal successors, (7872), 4349 states have internal predecessors, (7872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:40,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4350 states to 4350 states and 7872 transitions. [2021-11-07 01:55:40,190 INFO L78 Accepts]: Start accepts. Automaton has 4350 states and 7872 transitions. Word has length 75 [2021-11-07 01:55:40,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:40,191 INFO L470 AbstractCegarLoop]: Abstraction has 4350 states and 7872 transitions. [2021-11-07 01:55:40,191 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 01:55:40,191 INFO L276 IsEmpty]: Start isEmpty. Operand 4350 states and 7872 transitions. [2021-11-07 01:55:40,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:55:40,200 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:40,200 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 01:55:40,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:40,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:40,416 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:40,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:40,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1155074230, now seen corresponding path program 1 times [2021-11-07 01:55:40,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:40,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [228778466] [2021-11-07 01:55:40,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:40,417 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:40,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:40,419 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:40,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:55:41,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:41,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:55:41,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:41,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:41,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:41,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:41,421 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:41,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [228778466] [2021-11-07 01:55:41,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [228778466] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:41,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:41,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:55:41,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011802926] [2021-11-07 01:55:41,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:55:41,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:41,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:55:41,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:55:41,424 INFO L87 Difference]: Start difference. First operand 4350 states and 7872 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 01:55:41,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:41,894 INFO L93 Difference]: Finished difference Result 12091 states and 21911 transitions. [2021-11-07 01:55:41,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:55:41,895 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 01:55:41,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:41,917 INFO L225 Difference]: With dead ends: 12091 [2021-11-07 01:55:41,917 INFO L226 Difference]: Without dead ends: 7909 [2021-11-07 01:55:41,924 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 01:55:41,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7909 states. [2021-11-07 01:55:42,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7909 to 7256. [2021-11-07 01:55:42,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7256 states, 7250 states have (on average 1.8219310344827586) internal successors, (13209), 7255 states have internal predecessors, (13209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:42,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7256 states to 7256 states and 13209 transitions. [2021-11-07 01:55:42,426 INFO L78 Accepts]: Start accepts. Automaton has 7256 states and 13209 transitions. Word has length 76 [2021-11-07 01:55:42,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:42,428 INFO L470 AbstractCegarLoop]: Abstraction has 7256 states and 13209 transitions. [2021-11-07 01:55:42,428 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 01:55:42,429 INFO L276 IsEmpty]: Start isEmpty. Operand 7256 states and 13209 transitions. [2021-11-07 01:55:42,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:55:42,438 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:42,438 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 01:55:42,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:42,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:42,653 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:42,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:42,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1419737174, now seen corresponding path program 1 times [2021-11-07 01:55:42,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:42,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639006303] [2021-11-07 01:55:42,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:42,655 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:42,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:42,656 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:42,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:55:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:43,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:55:43,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:43,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:43,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:43,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:43,610 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:43,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639006303] [2021-11-07 01:55:43,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639006303] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:43,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:43,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:55:43,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105574101] [2021-11-07 01:55:43,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:55:43,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:43,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:55:43,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:55:43,611 INFO L87 Difference]: Start difference. First operand 7256 states and 13209 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 01:55:44,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:44,189 INFO L93 Difference]: Finished difference Result 21135 states and 38533 transitions. [2021-11-07 01:55:44,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:55:44,190 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 01:55:44,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:44,231 INFO L225 Difference]: With dead ends: 21135 [2021-11-07 01:55:44,231 INFO L226 Difference]: Without dead ends: 14055 [2021-11-07 01:55:44,240 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 01:55:44,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14055 states. [2021-11-07 01:55:44,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14055 to 13402. [2021-11-07 01:55:44,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13402 states, 13396 states have (on average 1.8281576590026873) internal successors, (24490), 13401 states have internal predecessors, (24490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:44,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13402 states to 13402 states and 24490 transitions. [2021-11-07 01:55:44,917 INFO L78 Accepts]: Start accepts. Automaton has 13402 states and 24490 transitions. Word has length 77 [2021-11-07 01:55:44,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:44,918 INFO L470 AbstractCegarLoop]: Abstraction has 13402 states and 24490 transitions. [2021-11-07 01:55:44,918 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 01:55:44,918 INFO L276 IsEmpty]: Start isEmpty. Operand 13402 states and 24490 transitions. [2021-11-07 01:55:44,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:55:44,930 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:44,930 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] [2021-11-07 01:55:44,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:45,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:45,142 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:45,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:45,142 INFO L85 PathProgramCache]: Analyzing trace with hash 150647078, now seen corresponding path program 1 times [2021-11-07 01:55:45,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:45,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1070636582] [2021-11-07 01:55:45,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:45,144 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:45,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:45,146 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:45,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:55:45,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:45,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:55:45,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:46,003 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:55:46,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:46,207 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:55:46,207 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:46,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1070636582] [2021-11-07 01:55:46,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1070636582] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:46,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:46,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:55:46,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397793454] [2021-11-07 01:55:46,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:55:46,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:46,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:55:46,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:55:46,209 INFO L87 Difference]: Start difference. First operand 13402 states and 24490 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:49,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:49,618 INFO L93 Difference]: Finished difference Result 33303 states and 60835 transitions. [2021-11-07 01:55:49,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:55:49,618 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-07 01:55:49,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:49,665 INFO L225 Difference]: With dead ends: 33303 [2021-11-07 01:55:49,665 INFO L226 Difference]: Without dead ends: 20198 [2021-11-07 01:55:49,683 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:55:49,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20198 states. [2021-11-07 01:55:50,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20198 to 13369. [2021-11-07 01:55:50,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13369 states, 13363 states have (on average 1.8227942827209458) internal successors, (24358), 13368 states have internal predecessors, (24358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:50,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13369 states to 13369 states and 24358 transitions. [2021-11-07 01:55:50,589 INFO L78 Accepts]: Start accepts. Automaton has 13369 states and 24358 transitions. Word has length 78 [2021-11-07 01:55:50,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:50,589 INFO L470 AbstractCegarLoop]: Abstraction has 13369 states and 24358 transitions. [2021-11-07 01:55:50,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:50,590 INFO L276 IsEmpty]: Start isEmpty. Operand 13369 states and 24358 transitions. [2021-11-07 01:55:50,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:55:50,601 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:50,601 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 01:55:50,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:50,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:50,826 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:50,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:50,826 INFO L85 PathProgramCache]: Analyzing trace with hash 2083198631, now seen corresponding path program 1 times [2021-11-07 01:55:50,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:50,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [188331224] [2021-11-07 01:55:50,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:50,827 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:50,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:50,828 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:50,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:55:51,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:51,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:55:51,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:51,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:51,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:51,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:51,941 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:51,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [188331224] [2021-11-07 01:55:51,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [188331224] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:51,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:51,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:55:51,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119152030] [2021-11-07 01:55:51,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:55:51,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:51,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:55:51,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:55:51,942 INFO L87 Difference]: Start difference. First operand 13369 states and 24358 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 01:55:52,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:52,998 INFO L93 Difference]: Finished difference Result 39306 states and 71687 transitions. [2021-11-07 01:55:52,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:55:52,999 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 01:55:52,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:53,070 INFO L225 Difference]: With dead ends: 39306 [2021-11-07 01:55:53,070 INFO L226 Difference]: Without dead ends: 26120 [2021-11-07 01:55:53,095 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 01:55:53,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26120 states. [2021-11-07 01:55:54,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26120 to 25467. [2021-11-07 01:55:54,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25467 states, 25461 states have (on average 1.8251836141549822) internal successors, (46471), 25466 states have internal predecessors, (46471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:54,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25467 states to 25467 states and 46471 transitions. [2021-11-07 01:55:54,363 INFO L78 Accepts]: Start accepts. Automaton has 25467 states and 46471 transitions. Word has length 78 [2021-11-07 01:55:54,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:54,364 INFO L470 AbstractCegarLoop]: Abstraction has 25467 states and 46471 transitions. [2021-11-07 01:55:54,364 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 01:55:54,364 INFO L276 IsEmpty]: Start isEmpty. Operand 25467 states and 46471 transitions. [2021-11-07 01:55:54,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:55:54,379 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:54,379 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 01:55:54,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-07 01:55:54,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:54,595 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:55:54,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:54,596 INFO L85 PathProgramCache]: Analyzing trace with hash 566655975, now seen corresponding path program 1 times [2021-11-07 01:55:54,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:54,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [945492176] [2021-11-07 01:55:54,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:54,597 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:54,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:54,597 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:54,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:55:55,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:55,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:55:55,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:55,529 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 01:55:55,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:55,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:55:55,740 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:55,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [945492176] [2021-11-07 01:55:55,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [945492176] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:55,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:55,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:55:55,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376345442] [2021-11-07 01:55:55,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:55:55,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:55,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:55:55,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:55:55,741 INFO L87 Difference]: Start difference. First operand 25467 states and 46471 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 01:55:57,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:57,794 INFO L93 Difference]: Finished difference Result 70239 states and 127762 transitions. [2021-11-07 01:55:57,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:55:57,794 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 01:55:57,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:57,898 INFO L225 Difference]: With dead ends: 70239 [2021-11-07 01:55:57,899 INFO L226 Difference]: Without dead ends: 45002 [2021-11-07 01:55:57,930 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 01:55:57,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45002 states. [2021-11-07 01:56:00,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45002 to 44349. [2021-11-07 01:56:00,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44349 states, 44343 states have (on average 1.8144013711296034) internal successors, (80456), 44348 states have internal predecessors, (80456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:00,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44349 states to 44349 states and 80456 transitions. [2021-11-07 01:56:00,262 INFO L78 Accepts]: Start accepts. Automaton has 44349 states and 80456 transitions. Word has length 79 [2021-11-07 01:56:00,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:00,263 INFO L470 AbstractCegarLoop]: Abstraction has 44349 states and 80456 transitions. [2021-11-07 01:56:00,263 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 01:56:00,263 INFO L276 IsEmpty]: Start isEmpty. Operand 44349 states and 80456 transitions. [2021-11-07 01:56:00,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 01:56:00,288 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:00,289 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] [2021-11-07 01:56:00,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:00,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:56:00,504 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:56:00,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:00,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1229687008, now seen corresponding path program 1 times [2021-11-07 01:56:00,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:00,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [887652989] [2021-11-07 01:56:00,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:00,506 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:00,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:00,508 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:00,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:56:01,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:01,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:56:01,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:01,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:56:01,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:01,734 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:56:01,734 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:01,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [887652989] [2021-11-07 01:56:01,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [887652989] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:01,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:56:01,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:56:01,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441014052] [2021-11-07 01:56:01,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:56:01,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:01,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:56:01,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:56:01,737 INFO L87 Difference]: Start difference. First operand 44349 states and 80456 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:08,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:08,868 INFO L93 Difference]: Finished difference Result 172664 states and 313125 transitions. [2021-11-07 01:56:08,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:56:08,869 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 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 01:56:08,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:09,186 INFO L225 Difference]: With dead ends: 172664 [2021-11-07 01:56:09,186 INFO L226 Difference]: Without dead ends: 128611 [2021-11-07 01:56:09,427 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:56:09,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128611 states. [2021-11-07 01:56:12,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128611 to 44091. [2021-11-07 01:56:12,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44091 states, 44085 states have (on average 1.8016105251219237) internal successors, (79424), 44090 states have internal predecessors, (79424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:12,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44091 states to 44091 states and 79424 transitions. [2021-11-07 01:56:12,458 INFO L78 Accepts]: Start accepts. Automaton has 44091 states and 79424 transitions. Word has length 80 [2021-11-07 01:56:12,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:12,458 INFO L470 AbstractCegarLoop]: Abstraction has 44091 states and 79424 transitions. [2021-11-07 01:56:12,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:12,458 INFO L276 IsEmpty]: Start isEmpty. Operand 44091 states and 79424 transitions. [2021-11-07 01:56:12,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 01:56:12,473 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:12,473 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] [2021-11-07 01:56:12,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:12,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:56:12,689 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:56:12,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:12,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1397099454, now seen corresponding path program 1 times [2021-11-07 01:56:12,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:12,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [414814933] [2021-11-07 01:56:12,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:12,690 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:12,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:12,691 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:12,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:56:13,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:13,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:56:13,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:13,607 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:13,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:13,800 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:13,800 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:13,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [414814933] [2021-11-07 01:56:13,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [414814933] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:13,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:56:13,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:56:13,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417015690] [2021-11-07 01:56:13,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:56:13,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:13,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:56:13,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:56:13,802 INFO L87 Difference]: Start difference. First operand 44091 states and 79424 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:15,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:15,952 INFO L93 Difference]: Finished difference Result 88533 states and 159430 transitions. [2021-11-07 01:56:15,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:56:15,952 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 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 01:56:15,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:16,014 INFO L225 Difference]: With dead ends: 88533 [2021-11-07 01:56:16,014 INFO L226 Difference]: Without dead ends: 44744 [2021-11-07 01:56:16,037 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:56:16,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44744 states. [2021-11-07 01:56:18,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44744 to 44091. [2021-11-07 01:56:18,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44091 states, 44085 states have (on average 1.798707043211977) internal successors, (79296), 44090 states have internal predecessors, (79296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:18,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44091 states to 44091 states and 79296 transitions. [2021-11-07 01:56:18,305 INFO L78 Accepts]: Start accepts. Automaton has 44091 states and 79296 transitions. Word has length 80 [2021-11-07 01:56:18,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:18,306 INFO L470 AbstractCegarLoop]: Abstraction has 44091 states and 79296 transitions. [2021-11-07 01:56:18,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:18,306 INFO L276 IsEmpty]: Start isEmpty. Operand 44091 states and 79296 transitions. [2021-11-07 01:56:18,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 01:56:18,316 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:18,317 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:56:18,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:18,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:56:18,517 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:56:18,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:18,518 INFO L85 PathProgramCache]: Analyzing trace with hash 300745717, now seen corresponding path program 1 times [2021-11-07 01:56:18,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:18,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1408484315] [2021-11-07 01:56:18,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:18,519 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:18,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:18,519 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:18,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b783815-d316-438a-bbdf-79205de5613a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:56:19,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:19,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:56:19,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:19,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:19,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:19,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:56:19,629 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:19,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1408484315] [2021-11-07 01:56:19,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1408484315] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:19,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:56:19,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:56:19,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924324838] [2021-11-07 01:56:19,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:56:19,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:19,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:56:19,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:56:19,631 INFO L87 Difference]: Start difference. First operand 44091 states and 79296 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 01:56:22,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:22,977 INFO L93 Difference]: Finished difference Result 123775 states and 222352 transitions. [2021-11-07 01:56:22,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:56:22,978 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 01:56:22,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:23,103 INFO L225 Difference]: With dead ends: 123775 [2021-11-07 01:56:23,103 INFO L226 Difference]: Without dead ends: 79946 [2021-11-07 01:56:23,129 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 01:56:23,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79946 states.