./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec11_product22.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_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/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_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/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_84584f01-1060-4fcb-8642-2b96d553be7a/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 25d1aac916acb353bef6b5512adabc0f3abdf00fe5619505211974e4efa18990 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:41:08,758 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:41:08,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:41:08,804 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:41:08,805 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:41:08,810 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:41:08,814 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:41:08,819 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:41:08,823 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:41:08,832 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:41:08,833 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:41:08,835 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:41:08,836 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:41:08,839 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:41:08,842 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:41:08,848 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:41:08,849 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:41:08,851 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:41:08,853 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:41:08,855 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:41:08,857 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:41:08,864 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:41:08,867 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:41:08,868 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:41:08,878 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:41:08,879 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:41:08,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:41:08,881 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:41:08,882 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:41:08,884 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:41:08,884 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:41:08,885 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:41:08,888 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:41:08,889 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:41:08,891 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:41:08,891 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:41:08,892 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:41:08,893 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:41:08,893 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:41:08,894 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:41:08,895 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:41:08,896 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:41:08,953 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:41:08,954 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:41:08,955 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:41:08,956 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:41:08,956 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:41:08,956 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:41:08,956 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:41:08,956 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:41:08,957 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:41:08,957 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:41:08,958 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:41:08,958 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:41:08,959 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:41:08,959 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:41:08,959 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:41:08,960 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:41:08,960 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:41:08,961 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:41:08,961 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:41:08,961 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:41:08,961 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:41:08,961 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:41:08,962 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:41:08,962 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:41:08,962 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:41:08,962 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:41:08,963 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:41:08,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:41:08,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:41:08,963 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:41:08,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:41:08,964 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:41:08,964 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:41:08,965 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:41:08,965 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:41:08,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:41:08,965 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:41:08,966 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:41:08,966 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:41:08,966 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_84584f01-1060-4fcb-8642-2b96d553be7a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25d1aac916acb353bef6b5512adabc0f3abdf00fe5619505211974e4efa18990 [2021-11-07 01:41:09,320 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:41:09,363 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:41:09,366 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:41:09,367 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:41:09,368 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:41:09,369 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec11_product22.cil.c [2021-11-07 01:41:09,456 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/data/8c0e88e7b/80212bd5105548eb8d0fd5b5824ebc24/FLAG0cfb487ed [2021-11-07 01:41:10,275 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:41:10,275 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/sv-benchmarks/c/product-lines/email_spec11_product22.cil.c [2021-11-07 01:41:10,301 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/data/8c0e88e7b/80212bd5105548eb8d0fd5b5824ebc24/FLAG0cfb487ed [2021-11-07 01:41:10,435 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/data/8c0e88e7b/80212bd5105548eb8d0fd5b5824ebc24 [2021-11-07 01:41:10,438 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:41:10,447 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:41:10,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:41:10,449 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:41:10,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:41:10,456 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:41:10" (1/1) ... [2021-11-07 01:41:10,458 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39a51f15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:10, skipping insertion in model container [2021-11-07 01:41:10,460 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:41:10" (1/1) ... [2021-11-07 01:41:10,470 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:41:10,574 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:41:11,073 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_84584f01-1060-4fcb-8642-2b96d553be7a/sv-benchmarks/c/product-lines/email_spec11_product22.cil.c[40875,40888] [2021-11-07 01:41:11,196 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:41:11,210 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 01:41:11,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6251e8eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:11, skipping insertion in model container [2021-11-07 01:41:11,212 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:41:11,213 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:41:11,215 INFO L168 Benchmark]: Toolchain (without parser) took 767.47 ms. Allocated memory is still 119.5 MB. Free memory was 80.4 MB in the beginning and 79.7 MB in the end (delta: 711.2 kB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:41:11,217 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 119.5 MB. Free memory was 89.0 MB in the beginning and 88.9 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:41:11,219 INFO L168 Benchmark]: CACSL2BoogieTranslator took 764.03 ms. Allocated memory is still 119.5 MB. Free memory was 80.2 MB in the beginning and 79.7 MB in the end (delta: 508.4 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:41:11,221 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 119.5 MB. Free memory was 89.0 MB in the beginning and 88.9 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 764.03 ms. Allocated memory is still 119.5 MB. Free memory was 80.2 MB in the beginning and 79.7 MB in the end (delta: 508.4 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2148]: 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_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/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_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/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_84584f01-1060-4fcb-8642-2b96d553be7a/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 25d1aac916acb353bef6b5512adabc0f3abdf00fe5619505211974e4efa18990 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:41:13,485 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:41:13,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:41:13,518 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:41:13,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:41:13,520 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:41:13,522 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:41:13,524 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:41:13,527 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:41:13,528 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:41:13,529 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:41:13,532 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:41:13,533 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:41:13,538 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:41:13,541 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:41:13,543 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:41:13,545 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:41:13,549 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:41:13,554 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:41:13,562 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:41:13,567 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:41:13,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:41:13,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:41:13,573 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:41:13,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:41:13,578 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:41:13,579 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:41:13,583 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:41:13,586 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:41:13,588 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:41:13,589 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:41:13,590 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:41:13,591 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:41:13,593 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:41:13,594 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:41:13,595 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:41:13,596 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:41:13,596 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:41:13,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:41:13,598 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:41:13,599 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:41:13,604 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:41:13,646 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:41:13,647 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:41:13,648 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:41:13,648 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:41:13,649 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:41:13,649 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:41:13,649 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:41:13,649 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:41:13,650 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:41:13,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:41:13,652 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:41:13,652 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:41:13,652 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:41:13,653 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:41:13,653 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:41:13,653 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:41:13,653 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:41:13,654 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:41:13,654 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:41:13,654 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:41:13,654 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:41:13,654 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:41:13,655 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:41:13,655 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:41:13,655 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:41:13,655 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:41:13,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:41:13,656 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:41:13,656 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:41:13,656 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:41:13,656 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:41:13,657 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:41:13,657 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:41:13,657 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:41:13,658 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:41:13,658 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_84584f01-1060-4fcb-8642-2b96d553be7a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25d1aac916acb353bef6b5512adabc0f3abdf00fe5619505211974e4efa18990 [2021-11-07 01:41:14,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:41:14,089 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:41:14,092 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:41:14,093 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:41:14,095 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:41:14,096 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec11_product22.cil.c [2021-11-07 01:41:14,175 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/data/f4243a1de/fc7c210d6d6c4481b8fbd37e5f86acb8/FLAG679c69300 [2021-11-07 01:41:14,931 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:41:14,931 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/sv-benchmarks/c/product-lines/email_spec11_product22.cil.c [2021-11-07 01:41:14,970 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/data/f4243a1de/fc7c210d6d6c4481b8fbd37e5f86acb8/FLAG679c69300 [2021-11-07 01:41:15,134 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/data/f4243a1de/fc7c210d6d6c4481b8fbd37e5f86acb8 [2021-11-07 01:41:15,137 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:41:15,138 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:41:15,143 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:41:15,143 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:41:15,147 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:41:15,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:41:15" (1/1) ... [2021-11-07 01:41:15,148 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eda50e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:15, skipping insertion in model container [2021-11-07 01:41:15,149 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:41:15" (1/1) ... [2021-11-07 01:41:15,157 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:41:15,258 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:41:15,715 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_84584f01-1060-4fcb-8642-2b96d553be7a/sv-benchmarks/c/product-lines/email_spec11_product22.cil.c[40875,40888] [2021-11-07 01:41:15,860 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:41:15,895 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:41:15,924 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:41:16,035 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_84584f01-1060-4fcb-8642-2b96d553be7a/sv-benchmarks/c/product-lines/email_spec11_product22.cil.c[40875,40888] [2021-11-07 01:41:16,089 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:41:16,109 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:41:16,199 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_84584f01-1060-4fcb-8642-2b96d553be7a/sv-benchmarks/c/product-lines/email_spec11_product22.cil.c[40875,40888] [2021-11-07 01:41:16,241 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:41:16,287 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:41:16,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:16 WrapperNode [2021-11-07 01:41:16,288 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:41:16,289 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:41:16,289 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:41:16,289 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:41:16,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:16" (1/1) ... [2021-11-07 01:41:16,346 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:16" (1/1) ... [2021-11-07 01:41:16,476 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:41:16,477 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:41:16,478 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:41:16,478 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:41:16,486 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:16" (1/1) ... [2021-11-07 01:41:16,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:16" (1/1) ... [2021-11-07 01:41:16,505 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:16" (1/1) ... [2021-11-07 01:41:16,505 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:16" (1/1) ... [2021-11-07 01:41:16,566 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:16" (1/1) ... [2021-11-07 01:41:16,594 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:16" (1/1) ... [2021-11-07 01:41:16,600 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:16" (1/1) ... [2021-11-07 01:41:16,625 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:41:16,626 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:41:16,629 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:41:16,629 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:41:16,630 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:16" (1/1) ... [2021-11-07 01:41:16,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:41:16,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:41:16,668 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:41:16,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:41:16,717 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:41:16,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:41:16,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:41:16,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:41:16,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:41:21,135 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:41:21,135 INFO L299 CfgBuilder]: Removed 323 assume(true) statements. [2021-11-07 01:41:21,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:41:21 BoogieIcfgContainer [2021-11-07 01:41:21,139 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:41:21,141 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:41:21,141 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:41:21,144 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:41:21,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:41:15" (1/3) ... [2021-11-07 01:41:21,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@413c122e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:41:21, skipping insertion in model container [2021-11-07 01:41:21,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:41:16" (2/3) ... [2021-11-07 01:41:21,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@413c122e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:41:21, skipping insertion in model container [2021-11-07 01:41:21,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:41:21" (3/3) ... [2021-11-07 01:41:21,147 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec11_product22.cil.c [2021-11-07 01:41:21,153 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:41:21,153 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 01:41:21,220 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:41:21,229 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 01:41:21,229 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 01:41:21,254 INFO L276 IsEmpty]: Start isEmpty. Operand has 475 states, 472 states have (on average 1.7394067796610169) internal successors, (821), 474 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:21,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:41:21,268 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:21,269 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] [2021-11-07 01:41:21,269 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:41:21,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:21,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1122672525, now seen corresponding path program 1 times [2021-11-07 01:41:21,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:21,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1691126736] [2021-11-07 01:41:21,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:21,291 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:21,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:21,294 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:21,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:41:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:21,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:41:21,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:22,044 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 01:41:22,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:22,195 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 01:41:22,196 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:22,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1691126736] [2021-11-07 01:41:22,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1691126736] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:22,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:22,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:41:22,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716533215] [2021-11-07 01:41:22,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:41:22,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:22,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:41:22,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:41:22,224 INFO L87 Difference]: Start difference. First operand has 475 states, 472 states have (on average 1.7394067796610169) internal successors, (821), 474 states have internal predecessors, (821), 0 states have call successors, (0), 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 26.0) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:22,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:22,294 INFO L93 Difference]: Finished difference Result 704 states and 1194 transitions. [2021-11-07 01:41:22,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:41:22,296 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 01:41:22,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:22,311 INFO L225 Difference]: With dead ends: 704 [2021-11-07 01:41:22,312 INFO L226 Difference]: Without dead ends: 432 [2021-11-07 01:41:22,316 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 102 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 01:41:22,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-11-07 01:41:22,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 432. [2021-11-07 01:41:22,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 430 states have (on average 1.7395348837209301) internal successors, (748), 431 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:22,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 748 transitions. [2021-11-07 01:41:22,406 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 748 transitions. Word has length 52 [2021-11-07 01:41:22,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:22,406 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 748 transitions. [2021-11-07 01:41:22,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:22,407 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 748 transitions. [2021-11-07 01:41:22,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:41:22,411 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:22,412 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 01:41:22,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:22,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:22,623 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:41:22,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:22,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1819587782, now seen corresponding path program 1 times [2021-11-07 01:41:22,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:22,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2069931638] [2021-11-07 01:41:22,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:22,626 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:22,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:22,627 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:22,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:41:23,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:23,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:41:23,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:23,194 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 01:41:23,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:23,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:23,369 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:23,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2069931638] [2021-11-07 01:41:23,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2069931638] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:23,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:23,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:41:23,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4456690] [2021-11-07 01:41:23,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:41:23,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:23,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:41:23,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:41:23,373 INFO L87 Difference]: Start difference. First operand 432 states and 748 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:23,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:23,528 INFO L93 Difference]: Finished difference Result 1266 states and 2196 transitions. [2021-11-07 01:41:23,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:41:23,529 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-07 01:41:23,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:23,538 INFO L225 Difference]: With dead ends: 1266 [2021-11-07 01:41:23,538 INFO L226 Difference]: Without dead ends: 849 [2021-11-07 01:41:23,544 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 102 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 01:41:23,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2021-11-07 01:41:23,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 431. [2021-11-07 01:41:23,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 429 states have (on average 1.731934731934732) internal successors, (743), 430 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:23,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 743 transitions. [2021-11-07 01:41:23,610 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 743 transitions. Word has length 53 [2021-11-07 01:41:23,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:23,612 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 743 transitions. [2021-11-07 01:41:23,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:23,612 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 743 transitions. [2021-11-07 01:41:23,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:41:23,626 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:23,627 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:23,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:23,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:23,841 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:41:23,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:23,842 INFO L85 PathProgramCache]: Analyzing trace with hash 514444192, now seen corresponding path program 1 times [2021-11-07 01:41:23,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:23,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1026118574] [2021-11-07 01:41:23,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:23,844 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:23,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:23,851 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:23,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:41:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:24,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:41:24,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:24,443 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 01:41:24,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:24,623 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 01:41:24,624 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:24,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1026118574] [2021-11-07 01:41:24,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1026118574] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:24,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:24,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:41:24,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34172702] [2021-11-07 01:41:24,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:41:24,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:24,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:41:24,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:41:24,626 INFO L87 Difference]: Start difference. First operand 431 states and 743 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 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 01:41:24,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:24,847 INFO L93 Difference]: Finished difference Result 1641 states and 2834 transitions. [2021-11-07 01:41:24,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:41:24,848 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 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 55 [2021-11-07 01:41:24,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:24,856 INFO L225 Difference]: With dead ends: 1641 [2021-11-07 01:41:24,856 INFO L226 Difference]: Without dead ends: 1228 [2021-11-07 01:41:24,857 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 104 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 01:41:24,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2021-11-07 01:41:24,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 430. [2021-11-07 01:41:24,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 428 states have (on average 1.7266355140186915) internal successors, (739), 429 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:24,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 739 transitions. [2021-11-07 01:41:24,893 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 739 transitions. Word has length 55 [2021-11-07 01:41:24,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:24,893 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 739 transitions. [2021-11-07 01:41:24,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 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 01:41:24,893 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 739 transitions. [2021-11-07 01:41:24,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 01:41:24,895 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:24,895 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 01:41:24,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-07 01:41:25,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:25,112 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:41:25,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:25,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1847295411, now seen corresponding path program 1 times [2021-11-07 01:41:25,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:25,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1118225686] [2021-11-07 01:41:25,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:25,114 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:25,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:25,115 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:25,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:41:25,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:25,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:41:25,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:25,692 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 01:41:25,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:25,849 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 01:41:25,849 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:25,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1118225686] [2021-11-07 01:41:25,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1118225686] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:25,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:25,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:41:25,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724723018] [2021-11-07 01:41:25,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:41:25,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:25,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:41:25,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:41:25,851 INFO L87 Difference]: Start difference. First operand 430 states and 739 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:25,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:25,916 INFO L93 Difference]: Finished difference Result 857 states and 1475 transitions. [2021-11-07 01:41:25,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:41:25,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 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 01:41:25,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:25,920 INFO L225 Difference]: With dead ends: 857 [2021-11-07 01:41:25,920 INFO L226 Difference]: Without dead ends: 435 [2021-11-07 01:41:25,921 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:41:25,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-11-07 01:41:25,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 430. [2021-11-07 01:41:25,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 428 states have (on average 1.719626168224299) internal successors, (736), 429 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:25,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 736 transitions. [2021-11-07 01:41:25,950 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 736 transitions. Word has length 56 [2021-11-07 01:41:25,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:25,950 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 736 transitions. [2021-11-07 01:41:25,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:25,951 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 736 transitions. [2021-11-07 01:41:25,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:41:25,952 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:25,952 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] [2021-11-07 01:41:25,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:26,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:26,170 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:41:26,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:26,171 INFO L85 PathProgramCache]: Analyzing trace with hash -125332856, now seen corresponding path program 1 times [2021-11-07 01:41:26,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:26,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [770191347] [2021-11-07 01:41:26,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:26,172 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:26,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:26,173 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:26,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:41:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:26,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:41:26,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:26,767 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 01:41:26,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:26,921 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 01:41:26,921 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:26,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [770191347] [2021-11-07 01:41:26,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [770191347] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:26,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:26,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:41:26,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008065969] [2021-11-07 01:41:26,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:41:26,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:26,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:41:26,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:41:26,924 INFO L87 Difference]: Start difference. First operand 430 states and 736 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:27,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:27,155 INFO L93 Difference]: Finished difference Result 1628 states and 2810 transitions. [2021-11-07 01:41:27,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:41:27,155 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 01:41:27,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:27,163 INFO L225 Difference]: With dead ends: 1628 [2021-11-07 01:41:27,163 INFO L226 Difference]: Without dead ends: 1224 [2021-11-07 01:41:27,164 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 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 01:41:27,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2021-11-07 01:41:27,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 430. [2021-11-07 01:41:27,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 428 states have (on average 1.7126168224299065) internal successors, (733), 429 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:27,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 733 transitions. [2021-11-07 01:41:27,202 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 733 transitions. Word has length 57 [2021-11-07 01:41:27,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:27,202 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 733 transitions. [2021-11-07 01:41:27,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:27,203 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 733 transitions. [2021-11-07 01:41:27,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:41:27,204 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:27,204 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:27,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:27,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:27,428 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:41:27,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:27,429 INFO L85 PathProgramCache]: Analyzing trace with hash -459559421, now seen corresponding path program 1 times [2021-11-07 01:41:27,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:27,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1377170732] [2021-11-07 01:41:27,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:27,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:27,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:27,432 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:27,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:41:27,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:27,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:41:27,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:28,054 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 01:41:28,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:28,211 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 01:41:28,212 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:28,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1377170732] [2021-11-07 01:41:28,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1377170732] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:28,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:28,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:41:28,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090281680] [2021-11-07 01:41:28,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:41:28,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:28,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:41:28,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:41:28,214 INFO L87 Difference]: Start difference. First operand 430 states and 733 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:28,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:28,291 INFO L93 Difference]: Finished difference Result 1020 states and 1739 transitions. [2021-11-07 01:41:28,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:41:28,291 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-07 01:41:28,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:28,297 INFO L225 Difference]: With dead ends: 1020 [2021-11-07 01:41:28,297 INFO L226 Difference]: Without dead ends: 834 [2021-11-07 01:41:28,298 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:41:28,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-11-07 01:41:28,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 648. [2021-11-07 01:41:28,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 646 states have (on average 1.7507739938080495) internal successors, (1131), 647 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:28,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1131 transitions. [2021-11-07 01:41:28,355 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1131 transitions. Word has length 59 [2021-11-07 01:41:28,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:28,355 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 1131 transitions. [2021-11-07 01:41:28,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:28,356 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1131 transitions. [2021-11-07 01:41:28,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:41:28,358 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:28,358 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:28,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:28,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:28,577 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:41:28,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:28,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1957993996, now seen corresponding path program 1 times [2021-11-07 01:41:28,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:28,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1577120537] [2021-11-07 01:41:28,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:28,579 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:28,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:28,580 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:28,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:41:29,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:29,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:41:29,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:29,262 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 01:41:29,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:29,409 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 01:41:29,409 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:29,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1577120537] [2021-11-07 01:41:29,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1577120537] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:29,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:29,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:41:29,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245837059] [2021-11-07 01:41:29,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:41:29,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:29,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:41:29,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:41:29,411 INFO L87 Difference]: Start difference. First operand 648 states and 1131 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:29,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:29,509 INFO L93 Difference]: Finished difference Result 1564 states and 2734 transitions. [2021-11-07 01:41:29,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:41:29,510 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:41:29,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:29,516 INFO L225 Difference]: With dead ends: 1564 [2021-11-07 01:41:29,517 INFO L226 Difference]: Without dead ends: 1000 [2021-11-07 01:41:29,518 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:41:29,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2021-11-07 01:41:29,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 814. [2021-11-07 01:41:29,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 812 states have (on average 1.7635467980295567) internal successors, (1432), 813 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:29,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1432 transitions. [2021-11-07 01:41:29,586 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1432 transitions. Word has length 71 [2021-11-07 01:41:29,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:29,586 INFO L470 AbstractCegarLoop]: Abstraction has 814 states and 1432 transitions. [2021-11-07 01:41:29,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:29,587 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1432 transitions. [2021-11-07 01:41:29,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:41:29,589 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:29,589 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 01:41:29,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:29,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:29,804 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:41:29,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:29,805 INFO L85 PathProgramCache]: Analyzing trace with hash 522268371, now seen corresponding path program 1 times [2021-11-07 01:41:29,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:29,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1423272790] [2021-11-07 01:41:29,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:29,806 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:29,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:29,811 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:29,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:41:30,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:30,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:41:30,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:30,609 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 01:41:30,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:30,835 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 01:41:30,836 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:30,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1423272790] [2021-11-07 01:41:30,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1423272790] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:30,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:30,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:41:30,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895339901] [2021-11-07 01:41:30,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:41:30,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:30,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:41:30,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:41:30,838 INFO L87 Difference]: Start difference. First operand 814 states and 1432 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 01:41:30,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:30,992 INFO L93 Difference]: Finished difference Result 2094 states and 3702 transitions. [2021-11-07 01:41:30,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:41:30,993 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 01:41:30,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:31,004 INFO L225 Difference]: With dead ends: 2094 [2021-11-07 01:41:31,004 INFO L226 Difference]: Without dead ends: 1372 [2021-11-07 01:41:31,007 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 01:41:31,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2021-11-07 01:41:31,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 1186. [2021-11-07 01:41:31,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1186 states, 1184 states have (on average 1.7820945945945945) internal successors, (2110), 1185 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:31,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 2110 transitions. [2021-11-07 01:41:31,133 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 2110 transitions. Word has length 72 [2021-11-07 01:41:31,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:31,134 INFO L470 AbstractCegarLoop]: Abstraction has 1186 states and 2110 transitions. [2021-11-07 01:41:31,134 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 01:41:31,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 2110 transitions. [2021-11-07 01:41:31,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:41:31,138 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:31,138 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 01:41:31,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:31,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:31,355 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:41:31,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:31,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1987313698, now seen corresponding path program 1 times [2021-11-07 01:41:31,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:31,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1820838766] [2021-11-07 01:41:31,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:31,356 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:31,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:31,356 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:31,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:41:31,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:31,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:41:31,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:32,085 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 01:41:32,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:32,257 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 01:41:32,257 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:32,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1820838766] [2021-11-07 01:41:32,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1820838766] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:32,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:32,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:41:32,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529692191] [2021-11-07 01:41:32,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:41:32,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:32,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:41:32,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:41:32,260 INFO L87 Difference]: Start difference. First operand 1186 states and 2110 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 01:41:32,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:32,451 INFO L93 Difference]: Finished difference Result 3190 states and 5705 transitions. [2021-11-07 01:41:32,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:41:32,452 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 01:41:32,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:32,466 INFO L225 Difference]: With dead ends: 3190 [2021-11-07 01:41:32,466 INFO L226 Difference]: Without dead ends: 2104 [2021-11-07 01:41:32,468 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 01:41:32,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-11-07 01:41:32,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1918. [2021-11-07 01:41:32,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1918 states, 1916 states have (on average 1.798016701461378) internal successors, (3445), 1917 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:32,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 3445 transitions. [2021-11-07 01:41:32,621 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 3445 transitions. Word has length 73 [2021-11-07 01:41:32,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:32,622 INFO L470 AbstractCegarLoop]: Abstraction has 1918 states and 3445 transitions. [2021-11-07 01:41:32,622 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 01:41:32,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 3445 transitions. [2021-11-07 01:41:32,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:41:32,627 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:32,627 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 01:41:32,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:32,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:32,843 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:41:32,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:32,843 INFO L85 PathProgramCache]: Analyzing trace with hash -955982430, now seen corresponding path program 1 times [2021-11-07 01:41:32,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:32,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639917210] [2021-11-07 01:41:32,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:32,844 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:32,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:32,846 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:32,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:41:33,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:33,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:41:33,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:33,612 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 01:41:33,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:33,794 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 01:41:33,795 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:33,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639917210] [2021-11-07 01:41:33,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639917210] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:33,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:33,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:41:33,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735074280] [2021-11-07 01:41:33,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:41:33,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:33,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:41:33,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:41:33,798 INFO L87 Difference]: Start difference. First operand 1918 states and 3445 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 01:41:34,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:34,093 INFO L93 Difference]: Finished difference Result 5122 states and 9229 transitions. [2021-11-07 01:41:34,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:41:34,093 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 01:41:34,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:34,117 INFO L225 Difference]: With dead ends: 5122 [2021-11-07 01:41:34,118 INFO L226 Difference]: Without dead ends: 3338 [2021-11-07 01:41:34,120 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 01:41:34,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2021-11-07 01:41:34,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 3152. [2021-11-07 01:41:34,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3152 states, 3150 states have (on average 1.8063492063492064) internal successors, (5690), 3151 states have internal predecessors, (5690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:34,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3152 states to 3152 states and 5690 transitions. [2021-11-07 01:41:34,446 INFO L78 Accepts]: Start accepts. Automaton has 3152 states and 5690 transitions. Word has length 74 [2021-11-07 01:41:34,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:34,446 INFO L470 AbstractCegarLoop]: Abstraction has 3152 states and 5690 transitions. [2021-11-07 01:41:34,447 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 01:41:34,447 INFO L276 IsEmpty]: Start isEmpty. Operand 3152 states and 5690 transitions. [2021-11-07 01:41:34,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:41:34,455 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:34,455 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 01:41:34,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:34,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:34,673 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:41:34,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:34,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1146769747, now seen corresponding path program 1 times [2021-11-07 01:41:34,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:34,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [8214838] [2021-11-07 01:41:34,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:34,674 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:34,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:34,675 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:34,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:41:35,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:35,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:41:35,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:35,474 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 01:41:35,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:35,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:41:35,641 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:35,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [8214838] [2021-11-07 01:41:35,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [8214838] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:35,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:35,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:41:35,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856452991] [2021-11-07 01:41:35,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:41:35,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:35,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:41:35,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:41:35,644 INFO L87 Difference]: Start difference. First operand 3152 states and 5690 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 01:41:36,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:36,047 INFO L93 Difference]: Finished difference Result 8540 states and 15447 transitions. [2021-11-07 01:41:36,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:41:36,048 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 01:41:36,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:36,088 INFO L225 Difference]: With dead ends: 8540 [2021-11-07 01:41:36,088 INFO L226 Difference]: Without dead ends: 5556 [2021-11-07 01:41:36,093 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 01:41:36,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5556 states. [2021-11-07 01:41:36,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5556 to 5370. [2021-11-07 01:41:36,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5370 states, 5368 states have (on average 1.8097988077496274) internal successors, (9715), 5369 states have internal predecessors, (9715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:36,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5370 states to 5370 states and 9715 transitions. [2021-11-07 01:41:36,570 INFO L78 Accepts]: Start accepts. Automaton has 5370 states and 9715 transitions. Word has length 75 [2021-11-07 01:41:36,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:36,571 INFO L470 AbstractCegarLoop]: Abstraction has 5370 states and 9715 transitions. [2021-11-07 01:41:36,571 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 01:41:36,572 INFO L276 IsEmpty]: Start isEmpty. Operand 5370 states and 9715 transitions. [2021-11-07 01:41:36,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:41:36,580 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:36,580 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 01:41:36,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:36,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:36,794 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:41:36,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:36,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1338544717, now seen corresponding path program 1 times [2021-11-07 01:41:36,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:36,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2000628208] [2021-11-07 01:41:36,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:36,796 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:36,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:36,797 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:36,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:41:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:37,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:41:37,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:37,558 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 01:41:37,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:37,768 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 01:41:37,768 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:37,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2000628208] [2021-11-07 01:41:37,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2000628208] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:37,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:37,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:41:37,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988704999] [2021-11-07 01:41:37,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:41:37,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:37,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:41:37,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:41:37,772 INFO L87 Difference]: Start difference. First operand 5370 states and 9715 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 01:41:38,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:38,399 INFO L93 Difference]: Finished difference Result 15520 states and 28133 transitions. [2021-11-07 01:41:38,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:41:38,399 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 01:41:38,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:38,449 INFO L225 Difference]: With dead ends: 15520 [2021-11-07 01:41:38,449 INFO L226 Difference]: Without dead ends: 10326 [2021-11-07 01:41:38,458 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 01:41:38,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10326 states. [2021-11-07 01:41:39,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10326 to 10140. [2021-11-07 01:41:39,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10140 states, 10138 states have (on average 1.8121917537975931) internal successors, (18372), 10139 states have internal predecessors, (18372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:39,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10140 states to 10140 states and 18372 transitions. [2021-11-07 01:41:39,322 INFO L78 Accepts]: Start accepts. Automaton has 10140 states and 18372 transitions. Word has length 76 [2021-11-07 01:41:39,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:39,323 INFO L470 AbstractCegarLoop]: Abstraction has 10140 states and 18372 transitions. [2021-11-07 01:41:39,323 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 01:41:39,323 INFO L276 IsEmpty]: Start isEmpty. Operand 10140 states and 18372 transitions. [2021-11-07 01:41:39,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:41:39,337 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:39,337 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] [2021-11-07 01:41:39,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:39,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:39,562 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:41:39,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:39,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1789572259, now seen corresponding path program 1 times [2021-11-07 01:41:39,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:39,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1889800827] [2021-11-07 01:41:39,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:39,564 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:39,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:39,565 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:39,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:41:40,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:40,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:41:40,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:40,407 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 01:41:40,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:40,650 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 01:41:40,650 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:40,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1889800827] [2021-11-07 01:41:40,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1889800827] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:40,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:40,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:41:40,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369777399] [2021-11-07 01:41:40,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:41:40,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:40,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:41:40,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:41:40,652 INFO L87 Difference]: Start difference. First operand 10140 states and 18372 transitions. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:43,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:43,671 INFO L93 Difference]: Finished difference Result 24979 states and 45269 transitions. [2021-11-07 01:41:43,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:41:43,672 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 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 01:41:43,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:43,720 INFO L225 Difference]: With dead ends: 24979 [2021-11-07 01:41:43,720 INFO L226 Difference]: Without dead ends: 15093 [2021-11-07 01:41:43,735 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 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 01:41:43,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15093 states. [2021-11-07 01:41:44,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15093 to 10107. [2021-11-07 01:41:44,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10107 states, 10105 states have (on average 1.805047006432459) internal successors, (18240), 10106 states have internal predecessors, (18240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:44,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10107 states to 10107 states and 18240 transitions. [2021-11-07 01:41:44,587 INFO L78 Accepts]: Start accepts. Automaton has 10107 states and 18240 transitions. Word has length 77 [2021-11-07 01:41:44,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:44,587 INFO L470 AbstractCegarLoop]: Abstraction has 10107 states and 18240 transitions. [2021-11-07 01:41:44,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:44,588 INFO L276 IsEmpty]: Start isEmpty. Operand 10107 states and 18240 transitions. [2021-11-07 01:41:44,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:41:44,603 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:44,603 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 01:41:44,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:44,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:44,818 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:41:44,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:44,819 INFO L85 PathProgramCache]: Analyzing trace with hash -762953406, now seen corresponding path program 1 times [2021-11-07 01:41:44,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:44,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1236541785] [2021-11-07 01:41:44,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:44,820 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:44,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:44,823 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:44,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:41:45,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:45,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:41:45,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:46,043 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 01:41:46,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:46,240 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 01:41:46,241 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:46,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1236541785] [2021-11-07 01:41:46,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1236541785] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:46,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:46,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:41:46,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144743096] [2021-11-07 01:41:46,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:41:46,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:46,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:41:46,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:41:46,244 INFO L87 Difference]: Start difference. First operand 10107 states and 18240 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 01:41:47,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:47,120 INFO L93 Difference]: Finished difference Result 29563 states and 53415 transitions. [2021-11-07 01:41:47,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:41:47,121 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 01:41:47,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:47,175 INFO L225 Difference]: With dead ends: 29563 [2021-11-07 01:41:47,176 INFO L226 Difference]: Without dead ends: 19639 [2021-11-07 01:41:47,191 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 01:41:47,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19639 states. [2021-11-07 01:41:48,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19639 to 19453. [2021-11-07 01:41:48,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19453 states, 19451 states have (on average 1.8047915274278958) internal successors, (35105), 19452 states have internal predecessors, (35105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:48,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19453 states to 19453 states and 35105 transitions. [2021-11-07 01:41:48,338 INFO L78 Accepts]: Start accepts. Automaton has 19453 states and 35105 transitions. Word has length 77 [2021-11-07 01:41:48,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:48,338 INFO L470 AbstractCegarLoop]: Abstraction has 19453 states and 35105 transitions. [2021-11-07 01:41:48,338 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 01:41:48,338 INFO L276 IsEmpty]: Start isEmpty. Operand 19453 states and 35105 transitions. [2021-11-07 01:41:48,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:41:48,351 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:48,351 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 01:41:48,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:48,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:48,567 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:41:48,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:48,567 INFO L85 PathProgramCache]: Analyzing trace with hash -2058800126, now seen corresponding path program 1 times [2021-11-07 01:41:48,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:48,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1168940629] [2021-11-07 01:41:48,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:48,568 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:48,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:48,569 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:48,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:41:49,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:49,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:41:49,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:49,362 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 01:41:49,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:49,514 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 01:41:49,514 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:49,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1168940629] [2021-11-07 01:41:49,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1168940629] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:49,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:49,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:41:49,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205459571] [2021-11-07 01:41:49,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:41:49,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:49,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:41:49,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:41:49,516 INFO L87 Difference]: Start difference. First operand 19453 states and 35105 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 01:41:51,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:51,127 INFO L93 Difference]: Finished difference Result 57787 states and 104324 transitions. [2021-11-07 01:41:51,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:41:51,127 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 01:41:51,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:51,225 INFO L225 Difference]: With dead ends: 57787 [2021-11-07 01:41:51,225 INFO L226 Difference]: Without dead ends: 38521 [2021-11-07 01:41:51,254 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 01:41:51,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38521 states. [2021-11-07 01:41:53,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38521 to 38335. [2021-11-07 01:41:53,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38335 states, 38333 states have (on average 1.8023634988130333) internal successors, (69090), 38334 states have internal predecessors, (69090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:41:53,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38335 states to 38335 states and 69090 transitions. [2021-11-07 01:41:53,166 INFO L78 Accepts]: Start accepts. Automaton has 38335 states and 69090 transitions. Word has length 78 [2021-11-07 01:41:53,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:53,167 INFO L470 AbstractCegarLoop]: Abstraction has 38335 states and 69090 transitions. [2021-11-07 01:41:53,167 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 01:41:53,167 INFO L276 IsEmpty]: Start isEmpty. Operand 38335 states and 69090 transitions. [2021-11-07 01:41:53,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:41:53,179 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:53,179 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] [2021-11-07 01:41:53,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:53,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:53,394 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:41:53,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:53,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1745045353, now seen corresponding path program 1 times [2021-11-07 01:41:53,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:53,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [659291008] [2021-11-07 01:41:53,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:53,396 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:53,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:53,397 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:53,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:41:54,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:54,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:41:54,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:54,367 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 01:41:54,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:54,572 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 01:41:54,572 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:54,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [659291008] [2021-11-07 01:41:54,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [659291008] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:54,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:54,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:41:54,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058823067] [2021-11-07 01:41:54,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:41:54,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:54,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:41:54,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:41:54,574 INFO L87 Difference]: Start difference. First operand 38335 states and 69090 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:01,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:01,668 INFO L93 Difference]: Finished difference Result 148737 states and 267907 transitions. [2021-11-07 01:42:01,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:42:01,668 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 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 01:42:01,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:01,955 INFO L225 Difference]: With dead ends: 148737 [2021-11-07 01:42:01,955 INFO L226 Difference]: Without dead ends: 110655 [2021-11-07 01:42:02,000 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 152 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 01:42:02,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110655 states. [2021-11-07 01:42:05,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110655 to 38077. [2021-11-07 01:42:05,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38077 states, 38075 states have (on average 1.7874720945502298) internal successors, (68058), 38076 states have internal predecessors, (68058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:05,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38077 states to 38077 states and 68058 transitions. [2021-11-07 01:42:05,320 INFO L78 Accepts]: Start accepts. Automaton has 38077 states and 68058 transitions. Word has length 79 [2021-11-07 01:42:05,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:05,320 INFO L470 AbstractCegarLoop]: Abstraction has 38077 states and 68058 transitions. [2021-11-07 01:42:05,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:05,320 INFO L276 IsEmpty]: Start isEmpty. Operand 38077 states and 68058 transitions. [2021-11-07 01:42:05,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:42:05,329 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:05,329 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] [2021-11-07 01:42:05,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:05,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:05,530 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:42:05,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:05,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1185455623, now seen corresponding path program 1 times [2021-11-07 01:42:05,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:05,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1988110512] [2021-11-07 01:42:05,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:05,531 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:05,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:05,532 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:05,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:42:06,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:06,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:42:06,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:06,424 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 01:42:06,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:06,600 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 01:42:06,600 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:06,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1988110512] [2021-11-07 01:42:06,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1988110512] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:06,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:06,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:42:06,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072271980] [2021-11-07 01:42:06,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:42:06,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:06,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:42:06,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:42:06,602 INFO L87 Difference]: Start difference. First operand 38077 states and 68058 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:08,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:08,298 INFO L93 Difference]: Finished difference Result 76081 states and 135992 transitions. [2021-11-07 01:42:08,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:42:08,298 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 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 01:42:08,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:08,362 INFO L225 Difference]: With dead ends: 76081 [2021-11-07 01:42:08,362 INFO L226 Difference]: Without dead ends: 38263 [2021-11-07 01:42:08,385 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 154 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 01:42:08,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38263 states. [2021-11-07 01:42:10,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38263 to 38077. [2021-11-07 01:42:10,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38077 states, 38075 states have (on average 1.7841103086014445) internal successors, (67930), 38076 states have internal predecessors, (67930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:10,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38077 states to 38077 states and 67930 transitions. [2021-11-07 01:42:10,568 INFO L78 Accepts]: Start accepts. Automaton has 38077 states and 67930 transitions. Word has length 79 [2021-11-07 01:42:10,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:10,569 INFO L470 AbstractCegarLoop]: Abstraction has 38077 states and 67930 transitions. [2021-11-07 01:42:10,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:42:10,569 INFO L276 IsEmpty]: Start isEmpty. Operand 38077 states and 67930 transitions. [2021-11-07 01:42:10,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:42:10,579 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:10,579 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 01:42:10,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:10,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:10,780 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:42:10,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:10,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1790283212, now seen corresponding path program 1 times [2021-11-07 01:42:10,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:10,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [385151825] [2021-11-07 01:42:10,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:10,781 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:10,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:10,782 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:10,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84584f01-1060-4fcb-8642-2b96d553be7a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:42:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:11,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:42:11,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:11,671 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 01:42:11,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:11,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:11,854 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:11,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [385151825] [2021-11-07 01:42:11,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [385151825] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:11,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:11,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:42:11,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974569556] [2021-11-07 01:42:11,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:42:11,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:11,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:42:11,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:42:11,856 INFO L87 Difference]: Start difference. First operand 38077 states and 67930 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 01:42:15,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:15,132 INFO L93 Difference]: Finished difference Result 105819 states and 188418 transitions. [2021-11-07 01:42:15,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:42:15,133 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 01:42:15,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:15,249 INFO L225 Difference]: With dead ends: 105819 [2021-11-07 01:42:15,249 INFO L226 Difference]: Without dead ends: 67961 [2021-11-07 01:42:15,278 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 01:42:15,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67961 states.