./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec4_product33.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_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/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_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec4_product33.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/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_9eabe366-36f6-4fec-9241-924ecb71d53b/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 7d58750164873693a8e41f270259eb299f067753793be4bdf6f5449bb7376f85 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:06:47,870 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:06:47,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:06:47,922 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:06:47,923 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:06:47,925 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:06:47,927 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:06:47,930 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:06:47,933 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:06:47,935 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:06:47,936 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:06:47,938 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:06:47,939 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:06:47,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:06:47,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:06:47,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:06:47,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:06:47,948 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:06:47,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:06:47,954 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:06:47,957 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:06:47,959 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:06:47,967 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:06:47,969 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:06:47,973 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:06:47,974 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:06:47,975 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:06:47,976 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:06:47,977 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:06:47,978 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:06:47,979 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:06:47,980 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:06:47,981 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:06:47,983 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:06:47,984 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:06:47,985 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:06:47,986 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:06:47,986 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:06:47,987 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:06:47,988 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:06:47,989 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:06:47,991 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:06:48,022 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:06:48,022 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:06:48,023 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:06:48,024 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:06:48,028 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:06:48,028 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:06:48,029 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:06:48,029 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:06:48,030 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:06:48,030 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:06:48,030 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:06:48,031 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:06:48,031 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:06:48,031 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:06:48,032 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:06:48,033 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:06:48,033 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:06:48,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:06:48,034 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:06:48,034 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:06:48,034 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:06:48,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:06:48,035 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:06:48,035 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:06:48,036 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:06:48,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:06:48,037 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:06:48,037 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:06:48,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:06:48,038 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:06:48,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:06:48,038 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:06:48,039 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:06:48,039 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:06:48,039 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:06:48,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:06:48,040 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:06:48,040 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:06:48,041 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:06:48,041 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_9eabe366-36f6-4fec-9241-924ecb71d53b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7d58750164873693a8e41f270259eb299f067753793be4bdf6f5449bb7376f85 [2021-11-07 02:06:48,405 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:06:48,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:06:48,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:06:48,450 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:06:48,450 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:06:48,451 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec4_product33.cil.c [2021-11-07 02:06:48,557 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/data/aa8ef4e3e/55444b65851d4a71b135a8e073b3c6d2/FLAG96fc1007c [2021-11-07 02:06:49,342 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:06:49,343 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/sv-benchmarks/c/product-lines/email_spec4_product33.cil.c [2021-11-07 02:06:49,386 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/data/aa8ef4e3e/55444b65851d4a71b135a8e073b3c6d2/FLAG96fc1007c [2021-11-07 02:06:49,498 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/data/aa8ef4e3e/55444b65851d4a71b135a8e073b3c6d2 [2021-11-07 02:06:49,501 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:06:49,504 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:06:49,507 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:06:49,508 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:06:49,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:06:49,513 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:06:49" (1/1) ... [2021-11-07 02:06:49,515 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@683042d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:49, skipping insertion in model container [2021-11-07 02:06:49,516 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:06:49" (1/1) ... [2021-11-07 02:06:49,524 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:06:49,614 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:06:49,947 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_9eabe366-36f6-4fec-9241-924ecb71d53b/sv-benchmarks/c/product-lines/email_spec4_product33.cil.c[11229,11242] [2021-11-07 02:06:50,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:06:50,410 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 02:06:50,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7a13e3e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:50, skipping insertion in model container [2021-11-07 02:06:50,410 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:06:50,411 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:06:50,414 INFO L168 Benchmark]: Toolchain (without parser) took 907.68 ms. Allocated memory is still 132.1 MB. Free memory was 96.7 MB in the beginning and 94.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:06:50,414 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 94.4 MB. Free memory is still 47.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:06:50,415 INFO L168 Benchmark]: CACSL2BoogieTranslator took 903.68 ms. Allocated memory is still 132.1 MB. Free memory was 96.4 MB in the beginning and 94.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:06:50,417 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 94.4 MB. Free memory is still 47.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 903.68 ms. Allocated memory is still 132.1 MB. Free memory was 96.4 MB in the beginning and 94.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 77]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/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_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec4_product33.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/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_9eabe366-36f6-4fec-9241-924ecb71d53b/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 7d58750164873693a8e41f270259eb299f067753793be4bdf6f5449bb7376f85 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:06:53,255 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:06:53,259 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:06:53,328 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:06:53,328 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:06:53,336 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:06:53,340 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:06:53,347 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:06:53,351 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:06:53,364 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:06:53,365 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:06:53,368 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:06:53,369 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:06:53,372 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:06:53,374 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:06:53,377 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:06:53,380 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:06:53,381 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:06:53,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:06:53,394 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:06:53,400 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:06:53,402 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:06:53,406 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:06:53,408 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:06:53,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:06:53,416 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:06:53,417 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:06:53,419 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:06:53,420 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:06:53,421 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:06:53,422 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:06:53,423 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:06:53,424 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:06:53,425 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:06:53,427 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:06:53,427 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:06:53,428 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:06:53,428 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:06:53,429 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:06:53,430 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:06:53,431 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:06:53,432 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:06:53,461 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:06:53,462 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:06:53,463 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:06:53,463 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:06:53,464 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:06:53,464 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:06:53,464 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:06:53,465 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:06:53,465 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:06:53,466 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:06:53,466 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:06:53,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:06:53,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:06:53,467 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:06:53,467 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:06:53,468 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:06:53,468 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:06:53,468 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:06:53,469 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:06:53,469 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:06:53,469 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:06:53,469 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:06:53,470 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:06:53,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:06:53,470 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:06:53,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:06:53,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:06:53,471 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:06:53,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:06:53,472 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:06:53,472 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:06:53,472 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:06:53,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:06:53,473 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:06:53,473 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:06:53,474 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_9eabe366-36f6-4fec-9241-924ecb71d53b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7d58750164873693a8e41f270259eb299f067753793be4bdf6f5449bb7376f85 [2021-11-07 02:06:54,005 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:06:54,051 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:06:54,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:06:54,057 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:06:54,058 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:06:54,061 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec4_product33.cil.c [2021-11-07 02:06:54,160 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/data/fdd0e33c7/3466a3cfc3564c84a907660c02ab8383/FLAG984c7666e [2021-11-07 02:06:55,152 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:06:55,152 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/sv-benchmarks/c/product-lines/email_spec4_product33.cil.c [2021-11-07 02:06:55,193 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/data/fdd0e33c7/3466a3cfc3564c84a907660c02ab8383/FLAG984c7666e [2021-11-07 02:06:55,245 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/data/fdd0e33c7/3466a3cfc3564c84a907660c02ab8383 [2021-11-07 02:06:55,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:06:55,252 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:06:55,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:06:55,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:06:55,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:06:55,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:06:55" (1/1) ... [2021-11-07 02:06:55,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31f0f56b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:55, skipping insertion in model container [2021-11-07 02:06:55,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:06:55" (1/1) ... [2021-11-07 02:06:55,271 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:06:55,381 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:06:55,763 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_9eabe366-36f6-4fec-9241-924ecb71d53b/sv-benchmarks/c/product-lines/email_spec4_product33.cil.c[11229,11242] [2021-11-07 02:06:56,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:06:56,230 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:06:56,275 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:06:56,321 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_9eabe366-36f6-4fec-9241-924ecb71d53b/sv-benchmarks/c/product-lines/email_spec4_product33.cil.c[11229,11242] [2021-11-07 02:06:56,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:06:56,476 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:06:56,526 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_9eabe366-36f6-4fec-9241-924ecb71d53b/sv-benchmarks/c/product-lines/email_spec4_product33.cil.c[11229,11242] [2021-11-07 02:06:56,618 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:06:56,661 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:06:56,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:56 WrapperNode [2021-11-07 02:06:56,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:06:56,663 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:06:56,663 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:06:56,663 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:06:56,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:56" (1/1) ... [2021-11-07 02:06:56,712 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:56" (1/1) ... [2021-11-07 02:06:56,852 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:06:56,853 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:06:56,853 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:06:56,853 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:06:56,863 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:56" (1/1) ... [2021-11-07 02:06:56,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:56" (1/1) ... [2021-11-07 02:06:56,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:56" (1/1) ... [2021-11-07 02:06:56,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:56" (1/1) ... [2021-11-07 02:06:56,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:56" (1/1) ... [2021-11-07 02:06:57,021 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:56" (1/1) ... [2021-11-07 02:06:57,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:56" (1/1) ... [2021-11-07 02:06:57,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:06:57,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:06:57,049 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:06:57,049 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:06:57,050 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:56" (1/1) ... [2021-11-07 02:06:57,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:06:57,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:06:57,087 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:06:57,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:06:57,144 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 02:06:57,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:06:57,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:06:57,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:06:57,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:07:02,422 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:07:02,423 INFO L299 CfgBuilder]: Removed 403 assume(true) statements. [2021-11-07 02:07:02,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:07:02 BoogieIcfgContainer [2021-11-07 02:07:02,427 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:07:02,429 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:07:02,429 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:07:02,433 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:07:02,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:06:55" (1/3) ... [2021-11-07 02:07:02,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10984e53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:07:02, skipping insertion in model container [2021-11-07 02:07:02,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:06:56" (2/3) ... [2021-11-07 02:07:02,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10984e53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:07:02, skipping insertion in model container [2021-11-07 02:07:02,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:07:02" (3/3) ... [2021-11-07 02:07:02,436 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec4_product33.cil.c [2021-11-07 02:07:02,443 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:07:02,443 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 02:07:02,505 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:07:02,512 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 02:07:02,512 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 02:07:02,558 INFO L276 IsEmpty]: Start isEmpty. Operand has 595 states, 592 states have (on average 1.7347972972972974) internal successors, (1027), 594 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:02,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 02:07:02,580 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:02,581 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:02,581 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:02,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:02,588 INFO L85 PathProgramCache]: Analyzing trace with hash 817966853, now seen corresponding path program 1 times [2021-11-07 02:07:02,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:02,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510331154] [2021-11-07 02:07:02,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:02,607 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:02,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:02,611 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:02,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:07:03,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:03,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:07:03,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:03,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:03,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:03,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:03,710 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:03,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510331154] [2021-11-07 02:07:03,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510331154] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:03,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:03,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:07:03,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820085043] [2021-11-07 02:07:03,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:07:03,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:03,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:07:03,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:07:03,742 INFO L87 Difference]: Start difference. First operand has 595 states, 592 states have (on average 1.7347972972972974) internal successors, (1027), 594 states have internal predecessors, (1027), 0 states have call successors, (0), 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 23.5) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:03,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:03,831 INFO L93 Difference]: Finished difference Result 944 states and 1606 transitions. [2021-11-07 02:07:03,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:07:03,834 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-07 02:07:03,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:03,865 INFO L225 Difference]: With dead ends: 944 [2021-11-07 02:07:03,865 INFO L226 Difference]: Without dead ends: 474 [2021-11-07 02:07:03,904 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:07:03,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-11-07 02:07:04,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 474. [2021-11-07 02:07:04,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 472 states have (on average 1.7415254237288136) internal successors, (822), 473 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:04,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 822 transitions. [2021-11-07 02:07:04,030 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 822 transitions. Word has length 47 [2021-11-07 02:07:04,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:04,030 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 822 transitions. [2021-11-07 02:07:04,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 23.5) internal successors, (47), 2 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:04,031 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 822 transitions. [2021-11-07 02:07:04,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 02:07:04,043 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:04,043 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:04,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:04,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:04,269 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:04,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:04,270 INFO L85 PathProgramCache]: Analyzing trace with hash 910502712, now seen corresponding path program 1 times [2021-11-07 02:07:04,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:04,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059299780] [2021-11-07 02:07:04,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:04,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:04,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:04,274 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:04,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:07:04,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:04,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:07:04,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:04,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:04,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:05,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:05,163 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:05,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2059299780] [2021-11-07 02:07:05,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2059299780] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:05,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:05,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:07:05,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748863124] [2021-11-07 02:07:05,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:07:05,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:05,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:07:05,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:07:05,168 INFO L87 Difference]: Start difference. First operand 474 states and 822 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:05,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:05,282 INFO L93 Difference]: Finished difference Result 1392 states and 2418 transitions. [2021-11-07 02:07:05,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:07:05,283 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 02:07:05,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:05,291 INFO L225 Difference]: With dead ends: 1392 [2021-11-07 02:07:05,291 INFO L226 Difference]: Without dead ends: 933 [2021-11-07 02:07:05,293 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:07:05,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2021-11-07 02:07:05,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 473. [2021-11-07 02:07:05,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 471 states have (on average 1.7346072186836519) internal successors, (817), 472 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:05,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 817 transitions. [2021-11-07 02:07:05,373 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 817 transitions. Word has length 48 [2021-11-07 02:07:05,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:05,375 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 817 transitions. [2021-11-07 02:07:05,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:05,376 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 817 transitions. [2021-11-07 02:07:05,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 02:07:05,387 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:05,387 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:05,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:05,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:05,600 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:05,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:05,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1530559726, now seen corresponding path program 1 times [2021-11-07 02:07:05,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:05,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2019096053] [2021-11-07 02:07:05,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:05,603 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:05,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:05,610 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:05,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:07:06,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:06,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:07:06,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:06,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:06,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:06,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:06,488 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:06,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2019096053] [2021-11-07 02:07:06,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2019096053] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:06,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:06,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:07:06,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075984965] [2021-11-07 02:07:06,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:07:06,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:06,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:07:06,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:07:06,492 INFO L87 Difference]: Start difference. First operand 473 states and 817 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:06,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:06,811 INFO L93 Difference]: Finished difference Result 1809 states and 3130 transitions. [2021-11-07 02:07:06,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:07:06,812 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-07 02:07:06,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:06,823 INFO L225 Difference]: With dead ends: 1809 [2021-11-07 02:07:06,824 INFO L226 Difference]: Without dead ends: 1354 [2021-11-07 02:07:06,825 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:07:06,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-11-07 02:07:06,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 472. [2021-11-07 02:07:06,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 470 states have (on average 1.7297872340425533) internal successors, (813), 471 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:06,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 813 transitions. [2021-11-07 02:07:06,873 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 813 transitions. Word has length 50 [2021-11-07 02:07:06,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:06,874 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 813 transitions. [2021-11-07 02:07:06,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:06,875 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 813 transitions. [2021-11-07 02:07:06,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 02:07:06,876 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:06,877 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:06,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:07,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:07,094 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:07,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:07,094 INFO L85 PathProgramCache]: Analyzing trace with hash 354128159, now seen corresponding path program 1 times [2021-11-07 02:07:07,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:07,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [851221481] [2021-11-07 02:07:07,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:07,096 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:07,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:07,101 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:07,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:07:07,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:07,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:07:07,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:07,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:07,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:07,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:07,913 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:07,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [851221481] [2021-11-07 02:07:07,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [851221481] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:07,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:07,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:07:07,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664874511] [2021-11-07 02:07:07,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:07:07,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:07,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:07:07,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:07:07,916 INFO L87 Difference]: Start difference. First operand 472 states and 813 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:08,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:08,014 INFO L93 Difference]: Finished difference Result 941 states and 1623 transitions. [2021-11-07 02:07:08,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:07:08,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 02:07:08,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:08,019 INFO L225 Difference]: With dead ends: 941 [2021-11-07 02:07:08,019 INFO L226 Difference]: Without dead ends: 477 [2021-11-07 02:07:08,021 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:07:08,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-11-07 02:07:08,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 472. [2021-11-07 02:07:08,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 470 states have (on average 1.7234042553191489) internal successors, (810), 471 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:08,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 810 transitions. [2021-11-07 02:07:08,057 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 810 transitions. Word has length 51 [2021-11-07 02:07:08,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:08,057 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 810 transitions. [2021-11-07 02:07:08,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:08,059 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 810 transitions. [2021-11-07 02:07:08,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 02:07:08,060 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:08,061 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 02:07:08,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:08,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:08,277 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:08,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:08,278 INFO L85 PathProgramCache]: Analyzing trace with hash -170849494, now seen corresponding path program 1 times [2021-11-07 02:07:08,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:08,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1173370989] [2021-11-07 02:07:08,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:08,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:08,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:08,281 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:08,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:07:08,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:08,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:07:08,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:08,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:08,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:09,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:09,097 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:09,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1173370989] [2021-11-07 02:07:09,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1173370989] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:09,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:09,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:07:09,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80676294] [2021-11-07 02:07:09,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:07:09,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:09,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:07:09,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:07:09,099 INFO L87 Difference]: Start difference. First operand 472 states and 810 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:09,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:09,387 INFO L93 Difference]: Finished difference Result 1796 states and 3106 transitions. [2021-11-07 02:07:09,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:07:09,388 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 02:07:09,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:09,398 INFO L225 Difference]: With dead ends: 1796 [2021-11-07 02:07:09,398 INFO L226 Difference]: Without dead ends: 1350 [2021-11-07 02:07:09,399 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:07:09,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-11-07 02:07:09,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 472. [2021-11-07 02:07:09,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 470 states have (on average 1.7170212765957447) internal successors, (807), 471 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:09,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 807 transitions. [2021-11-07 02:07:09,448 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 807 transitions. Word has length 52 [2021-11-07 02:07:09,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:09,449 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 807 transitions. [2021-11-07 02:07:09,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:09,449 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 807 transitions. [2021-11-07 02:07:09,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 02:07:09,451 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:09,451 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:09,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:09,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:09,664 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:09,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:09,666 INFO L85 PathProgramCache]: Analyzing trace with hash 397569743, now seen corresponding path program 1 times [2021-11-07 02:07:09,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:09,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1838815745] [2021-11-07 02:07:09,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:09,670 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:09,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:09,671 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:09,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:07:10,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:10,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:10,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:10,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:10,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:10,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:10,521 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:10,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1838815745] [2021-11-07 02:07:10,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1838815745] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:10,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:10,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:07:10,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656782015] [2021-11-07 02:07:10,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:07:10,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:10,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:07:10,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:07:10,524 INFO L87 Difference]: Start difference. First operand 472 states and 807 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:10,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:10,638 INFO L93 Difference]: Finished difference Result 1146 states and 1961 transitions. [2021-11-07 02:07:10,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:07:10,640 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 02:07:10,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:10,655 INFO L225 Difference]: With dead ends: 1146 [2021-11-07 02:07:10,656 INFO L226 Difference]: Without dead ends: 918 [2021-11-07 02:07:10,657 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:07:10,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2021-11-07 02:07:10,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 690. [2021-11-07 02:07:10,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 688 states have (on average 1.751453488372093) internal successors, (1205), 689 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:10,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1205 transitions. [2021-11-07 02:07:10,756 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1205 transitions. Word has length 54 [2021-11-07 02:07:10,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:10,757 INFO L470 AbstractCegarLoop]: Abstraction has 690 states and 1205 transitions. [2021-11-07 02:07:10,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:10,757 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1205 transitions. [2021-11-07 02:07:10,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 02:07:10,759 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:10,760 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:10,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:10,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:10,977 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:10,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:10,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1303136318, now seen corresponding path program 1 times [2021-11-07 02:07:10,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:10,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075071973] [2021-11-07 02:07:10,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:10,979 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:10,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:10,980 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:10,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:07:11,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:11,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:11,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:11,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:11,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:11,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:11,850 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:11,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075071973] [2021-11-07 02:07:11,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1075071973] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:11,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:11,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:07:11,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941693038] [2021-11-07 02:07:11,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:11,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:11,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:11,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:11,853 INFO L87 Difference]: Start difference. First operand 690 states and 1205 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:11,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:11,954 INFO L93 Difference]: Finished difference Result 1690 states and 2956 transitions. [2021-11-07 02:07:11,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:11,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 02:07:11,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:11,964 INFO L225 Difference]: With dead ends: 1690 [2021-11-07 02:07:11,964 INFO L226 Difference]: Without dead ends: 1084 [2021-11-07 02:07:11,967 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:11,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2021-11-07 02:07:12,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 856. [2021-11-07 02:07:12,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 854 states have (on average 1.7634660421545667) internal successors, (1506), 855 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:12,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1506 transitions. [2021-11-07 02:07:12,061 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1506 transitions. Word has length 66 [2021-11-07 02:07:12,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:12,088 INFO L470 AbstractCegarLoop]: Abstraction has 856 states and 1506 transitions. [2021-11-07 02:07:12,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:12,088 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1506 transitions. [2021-11-07 02:07:12,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 02:07:12,091 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:12,091 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:12,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:12,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:12,308 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:12,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:12,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1666427903, now seen corresponding path program 1 times [2021-11-07 02:07:12,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:12,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [582673125] [2021-11-07 02:07:12,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:12,310 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:12,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:12,311 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:12,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:07:12,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:12,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:12,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:13,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:13,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:13,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:13,237 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:13,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [582673125] [2021-11-07 02:07:13,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [582673125] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:13,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:13,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:07:13,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854712574] [2021-11-07 02:07:13,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:13,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:13,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:13,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:13,240 INFO L87 Difference]: Start difference. First operand 856 states and 1506 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:13,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:13,407 INFO L93 Difference]: Finished difference Result 2220 states and 3924 transitions. [2021-11-07 02:07:13,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:13,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 02:07:13,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:13,419 INFO L225 Difference]: With dead ends: 2220 [2021-11-07 02:07:13,420 INFO L226 Difference]: Without dead ends: 1456 [2021-11-07 02:07:13,421 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:13,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2021-11-07 02:07:13,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1228. [2021-11-07 02:07:13,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1226 states have (on average 1.7814029363784665) internal successors, (2184), 1227 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:13,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 2184 transitions. [2021-11-07 02:07:13,535 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 2184 transitions. Word has length 67 [2021-11-07 02:07:13,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:13,535 INFO L470 AbstractCegarLoop]: Abstraction has 1228 states and 2184 transitions. [2021-11-07 02:07:13,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:13,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 2184 transitions. [2021-11-07 02:07:13,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 02:07:13,539 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:13,539 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:13,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:13,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:13,756 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:13,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:13,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1029110448, now seen corresponding path program 1 times [2021-11-07 02:07:13,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:13,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1077452224] [2021-11-07 02:07:13,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:13,758 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:13,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:13,759 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:13,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:07:14,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:14,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:14,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:14,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:14,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:14,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:14,644 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:14,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1077452224] [2021-11-07 02:07:14,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1077452224] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:14,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:14,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:07:14,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570061536] [2021-11-07 02:07:14,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:14,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:14,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:14,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:14,647 INFO L87 Difference]: Start difference. First operand 1228 states and 2184 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:14,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:14,824 INFO L93 Difference]: Finished difference Result 3316 states and 5927 transitions. [2021-11-07 02:07:14,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:14,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 02:07:14,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:14,871 INFO L225 Difference]: With dead ends: 3316 [2021-11-07 02:07:14,872 INFO L226 Difference]: Without dead ends: 2188 [2021-11-07 02:07:14,877 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:14,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2021-11-07 02:07:15,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 1960. [2021-11-07 02:07:15,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1960 states, 1958 states have (on average 1.7972420837589378) internal successors, (3519), 1959 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:15,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1960 states to 1960 states and 3519 transitions. [2021-11-07 02:07:15,074 INFO L78 Accepts]: Start accepts. Automaton has 1960 states and 3519 transitions. Word has length 68 [2021-11-07 02:07:15,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:15,075 INFO L470 AbstractCegarLoop]: Abstraction has 1960 states and 3519 transitions. [2021-11-07 02:07:15,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:15,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1960 states and 3519 transitions. [2021-11-07 02:07:15,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 02:07:15,083 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:15,083 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:15,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:15,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:15,301 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:15,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:15,301 INFO L85 PathProgramCache]: Analyzing trace with hash -278677552, now seen corresponding path program 1 times [2021-11-07 02:07:15,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:15,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1168037797] [2021-11-07 02:07:15,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:15,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:15,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:15,304 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:15,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:07:15,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:15,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:15,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:16,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:16,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:16,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:16,250 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:16,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1168037797] [2021-11-07 02:07:16,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1168037797] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:16,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:16,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:07:16,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047549722] [2021-11-07 02:07:16,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:16,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:16,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:16,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:16,253 INFO L87 Difference]: Start difference. First operand 1960 states and 3519 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:16,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:16,518 INFO L93 Difference]: Finished difference Result 5248 states and 9451 transitions. [2021-11-07 02:07:16,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:16,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 02:07:16,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:16,543 INFO L225 Difference]: With dead ends: 5248 [2021-11-07 02:07:16,543 INFO L226 Difference]: Without dead ends: 3422 [2021-11-07 02:07:16,546 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:16,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3422 states. [2021-11-07 02:07:16,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3422 to 3194. [2021-11-07 02:07:16,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3194 states, 3192 states have (on average 1.805764411027569) internal successors, (5764), 3193 states have internal predecessors, (5764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:16,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3194 states to 3194 states and 5764 transitions. [2021-11-07 02:07:16,825 INFO L78 Accepts]: Start accepts. Automaton has 3194 states and 5764 transitions. Word has length 69 [2021-11-07 02:07:16,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:16,826 INFO L470 AbstractCegarLoop]: Abstraction has 3194 states and 5764 transitions. [2021-11-07 02:07:16,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:16,827 INFO L276 IsEmpty]: Start isEmpty. Operand 3194 states and 5764 transitions. [2021-11-07 02:07:16,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 02:07:16,832 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:16,832 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:16,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:17,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:17,053 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:17,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:17,053 INFO L85 PathProgramCache]: Analyzing trace with hash -896599681, now seen corresponding path program 1 times [2021-11-07 02:07:17,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:17,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2121429841] [2021-11-07 02:07:17,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:17,054 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:17,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:17,055 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:17,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:07:17,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:17,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:17,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:17,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:17,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:17,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:17,916 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:17,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2121429841] [2021-11-07 02:07:17,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2121429841] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:17,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:17,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:07:17,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358364465] [2021-11-07 02:07:17,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:17,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:17,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:17,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:17,918 INFO L87 Difference]: Start difference. First operand 3194 states and 5764 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:18,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:18,314 INFO L93 Difference]: Finished difference Result 8666 states and 15669 transitions. [2021-11-07 02:07:18,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:18,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 02:07:18,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:18,354 INFO L225 Difference]: With dead ends: 8666 [2021-11-07 02:07:18,355 INFO L226 Difference]: Without dead ends: 5640 [2021-11-07 02:07:18,362 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:18,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5640 states. [2021-11-07 02:07:18,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5640 to 5412. [2021-11-07 02:07:18,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5412 states, 5410 states have (on average 1.8094269870609982) internal successors, (9789), 5411 states have internal predecessors, (9789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:18,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5412 states to 5412 states and 9789 transitions. [2021-11-07 02:07:18,761 INFO L78 Accepts]: Start accepts. Automaton has 5412 states and 9789 transitions. Word has length 70 [2021-11-07 02:07:18,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:18,763 INFO L470 AbstractCegarLoop]: Abstraction has 5412 states and 9789 transitions. [2021-11-07 02:07:18,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:18,763 INFO L276 IsEmpty]: Start isEmpty. Operand 5412 states and 9789 transitions. [2021-11-07 02:07:18,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 02:07:18,772 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:18,772 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 02:07:18,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:18,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:18,989 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:18,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:18,990 INFO L85 PathProgramCache]: Analyzing trace with hash 222929183, now seen corresponding path program 1 times [2021-11-07 02:07:18,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:18,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1517243935] [2021-11-07 02:07:18,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:18,991 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:18,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:18,992 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:18,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:07:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:19,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:19,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:19,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:19,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:20,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:20,006 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:20,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1517243935] [2021-11-07 02:07:20,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1517243935] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:20,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:20,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:07:20,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859821511] [2021-11-07 02:07:20,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:20,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:20,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:20,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:20,008 INFO L87 Difference]: Start difference. First operand 5412 states and 9789 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 02:07:20,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:20,633 INFO L93 Difference]: Finished difference Result 15646 states and 28355 transitions. [2021-11-07 02:07:20,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:20,636 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 02:07:20,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:20,692 INFO L225 Difference]: With dead ends: 15646 [2021-11-07 02:07:20,693 INFO L226 Difference]: Without dead ends: 10410 [2021-11-07 02:07:20,702 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 02:07:20,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10410 states. [2021-11-07 02:07:21,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10410 to 10182. [2021-11-07 02:07:21,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10182 states, 10180 states have (on average 1.811984282907662) internal successors, (18446), 10181 states have internal predecessors, (18446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:21,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10182 states to 10182 states and 18446 transitions. [2021-11-07 02:07:21,528 INFO L78 Accepts]: Start accepts. Automaton has 10182 states and 18446 transitions. Word has length 71 [2021-11-07 02:07:21,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:21,528 INFO L470 AbstractCegarLoop]: Abstraction has 10182 states and 18446 transitions. [2021-11-07 02:07:21,529 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 02:07:21,529 INFO L276 IsEmpty]: Start isEmpty. Operand 10182 states and 18446 transitions. [2021-11-07 02:07:21,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 02:07:21,539 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:21,539 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] [2021-11-07 02:07:21,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:21,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:21,752 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:21,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:21,753 INFO L85 PathProgramCache]: Analyzing trace with hash -759053265, now seen corresponding path program 1 times [2021-11-07 02:07:21,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:21,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1216395362] [2021-11-07 02:07:21,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:21,754 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:21,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:21,756 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:21,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:07:22,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:22,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:07:22,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:22,762 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:07:22,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:22,997 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:07:22,997 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:22,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1216395362] [2021-11-07 02:07:22,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1216395362] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:22,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:22,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:07:22,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526468476] [2021-11-07 02:07:22,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:07:22,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:22,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:07:22,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:07:22,999 INFO L87 Difference]: Start difference. First operand 10182 states and 18446 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:25,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:25,933 INFO L93 Difference]: Finished difference Result 25105 states and 45491 transitions. [2021-11-07 02:07:25,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:07:25,934 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 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 02:07:25,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:25,985 INFO L225 Difference]: With dead ends: 25105 [2021-11-07 02:07:25,985 INFO L226 Difference]: Without dead ends: 15177 [2021-11-07 02:07:26,002 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:07:26,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15177 states. [2021-11-07 02:07:26,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15177 to 10149. [2021-11-07 02:07:26,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10149 states, 10147 states have (on average 1.8048684340199073) internal successors, (18314), 10148 states have internal predecessors, (18314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:26,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10149 states to 10149 states and 18314 transitions. [2021-11-07 02:07:26,823 INFO L78 Accepts]: Start accepts. Automaton has 10149 states and 18314 transitions. Word has length 72 [2021-11-07 02:07:26,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:26,823 INFO L470 AbstractCegarLoop]: Abstraction has 10149 states and 18314 transitions. [2021-11-07 02:07:26,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:26,824 INFO L276 IsEmpty]: Start isEmpty. Operand 10149 states and 18314 transitions. [2021-11-07 02:07:26,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 02:07:26,833 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:26,834 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 02:07:26,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:27,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:27,048 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:27,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:27,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1271230416, now seen corresponding path program 1 times [2021-11-07 02:07:27,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:27,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [66194416] [2021-11-07 02:07:27,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:27,050 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:27,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:27,051 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:27,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:07:27,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:27,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:27,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:27,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:27,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:28,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:28,102 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:28,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [66194416] [2021-11-07 02:07:28,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [66194416] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:28,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:28,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:07:28,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398001031] [2021-11-07 02:07:28,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:28,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:28,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:28,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:28,105 INFO L87 Difference]: Start difference. First operand 10149 states and 18314 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 02:07:29,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:29,045 INFO L93 Difference]: Finished difference Result 29689 states and 53637 transitions. [2021-11-07 02:07:29,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:29,046 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 02:07:29,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:29,109 INFO L225 Difference]: With dead ends: 29689 [2021-11-07 02:07:29,110 INFO L226 Difference]: Without dead ends: 19723 [2021-11-07 02:07:29,127 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 02:07:29,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19723 states. [2021-11-07 02:07:30,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19723 to 19495. [2021-11-07 02:07:30,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19495 states, 19493 states have (on average 1.804699122762017) internal successors, (35179), 19494 states have internal predecessors, (35179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:30,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19495 states to 19495 states and 35179 transitions. [2021-11-07 02:07:30,513 INFO L78 Accepts]: Start accepts. Automaton has 19495 states and 35179 transitions. Word has length 72 [2021-11-07 02:07:30,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:30,514 INFO L470 AbstractCegarLoop]: Abstraction has 19495 states and 35179 transitions. [2021-11-07 02:07:30,514 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 02:07:30,515 INFO L276 IsEmpty]: Start isEmpty. Operand 19495 states and 35179 transitions. [2021-11-07 02:07:30,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 02:07:30,529 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:30,529 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 02:07:30,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:30,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:30,753 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:30,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:30,754 INFO L85 PathProgramCache]: Analyzing trace with hash -157620880, now seen corresponding path program 1 times [2021-11-07 02:07:30,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:30,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [526193492] [2021-11-07 02:07:30,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:30,755 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:30,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:30,757 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:30,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:07:31,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:31,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:31,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:31,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:31,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:31,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:31,969 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:31,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [526193492] [2021-11-07 02:07:31,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [526193492] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:31,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:31,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:07:31,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599756253] [2021-11-07 02:07:31,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:31,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:31,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:31,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:31,972 INFO L87 Difference]: Start difference. First operand 19495 states and 35179 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 02:07:34,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:34,225 INFO L93 Difference]: Finished difference Result 57913 states and 104546 transitions. [2021-11-07 02:07:34,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:34,226 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 02:07:34,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:34,333 INFO L225 Difference]: With dead ends: 57913 [2021-11-07 02:07:34,333 INFO L226 Difference]: Without dead ends: 38605 [2021-11-07 02:07:34,366 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 02:07:34,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38605 states. [2021-11-07 02:07:36,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38605 to 38377. [2021-11-07 02:07:37,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38377 states, 38375 states have (on average 1.8023192182410424) internal successors, (69164), 38376 states have internal predecessors, (69164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:37,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38377 states to 38377 states and 69164 transitions. [2021-11-07 02:07:37,108 INFO L78 Accepts]: Start accepts. Automaton has 38377 states and 69164 transitions. Word has length 73 [2021-11-07 02:07:37,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:37,108 INFO L470 AbstractCegarLoop]: Abstraction has 38377 states and 69164 transitions. [2021-11-07 02:07:37,108 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 02:07:37,109 INFO L276 IsEmpty]: Start isEmpty. Operand 38377 states and 69164 transitions. [2021-11-07 02:07:37,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 02:07:37,120 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:37,121 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] [2021-11-07 02:07:37,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 02:07:37,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:37,331 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:37,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:37,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1461842519, now seen corresponding path program 1 times [2021-11-07 02:07:37,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:37,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [366635201] [2021-11-07 02:07:37,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:37,333 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:37,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:37,334 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:37,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:07:38,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:38,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:07:38,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:38,578 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:07:38,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:38,827 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:07:38,827 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:38,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [366635201] [2021-11-07 02:07:38,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [366635201] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:38,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:38,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:07:38,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921257826] [2021-11-07 02:07:38,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:07:38,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:38,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:07:38,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:07:38,829 INFO L87 Difference]: Start difference. First operand 38377 states and 69164 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 02:07:46,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:46,505 INFO L93 Difference]: Finished difference Result 148905 states and 268203 transitions. [2021-11-07 02:07:46,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:07:46,506 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 74 [2021-11-07 02:07:46,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:46,825 INFO L225 Difference]: With dead ends: 148905 [2021-11-07 02:07:46,825 INFO L226 Difference]: Without dead ends: 110781 [2021-11-07 02:07:46,871 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:07:47,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110781 states. [2021-11-07 02:07:50,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110781 to 38119. [2021-11-07 02:07:50,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38119 states, 38117 states have (on average 1.787443922659181) internal successors, (68132), 38118 states have internal predecessors, (68132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:50,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38119 states to 38119 states and 68132 transitions. [2021-11-07 02:07:50,400 INFO L78 Accepts]: Start accepts. Automaton has 38119 states and 68132 transitions. Word has length 74 [2021-11-07 02:07:50,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:50,401 INFO L470 AbstractCegarLoop]: Abstraction has 38119 states and 68132 transitions. [2021-11-07 02:07:50,401 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 02:07:50,401 INFO L276 IsEmpty]: Start isEmpty. Operand 38119 states and 68132 transitions. [2021-11-07 02:07:50,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 02:07:50,416 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:50,416 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] [2021-11-07 02:07:50,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:50,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:50,632 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:50,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:50,633 INFO L85 PathProgramCache]: Analyzing trace with hash -74937269, now seen corresponding path program 1 times [2021-11-07 02:07:50,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:50,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1615292357] [2021-11-07 02:07:50,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:50,635 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:50,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:50,637 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:50,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:07:51,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:51,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:51,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:51,763 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:51,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:51,965 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:51,965 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:51,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1615292357] [2021-11-07 02:07:51,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1615292357] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:51,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:51,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:07:51,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131037015] [2021-11-07 02:07:51,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:07:51,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:51,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:07:51,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:07:51,968 INFO L87 Difference]: Start difference. First operand 38119 states and 68132 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:54,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:54,226 INFO L93 Difference]: Finished difference Result 76207 states and 136214 transitions. [2021-11-07 02:07:54,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:54,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 02:07:54,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:54,310 INFO L225 Difference]: With dead ends: 76207 [2021-11-07 02:07:54,310 INFO L226 Difference]: Without dead ends: 38347 [2021-11-07 02:07:54,345 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:07:54,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38347 states. [2021-11-07 02:07:56,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38347 to 38119. [2021-11-07 02:07:56,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38119 states, 38117 states have (on average 1.7840858409633498) internal successors, (68004), 38118 states have internal predecessors, (68004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:57,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38119 states to 38119 states and 68004 transitions. [2021-11-07 02:07:57,023 INFO L78 Accepts]: Start accepts. Automaton has 38119 states and 68004 transitions. Word has length 74 [2021-11-07 02:07:57,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:57,023 INFO L470 AbstractCegarLoop]: Abstraction has 38119 states and 68004 transitions. [2021-11-07 02:07:57,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:57,023 INFO L276 IsEmpty]: Start isEmpty. Operand 38119 states and 68004 transitions. [2021-11-07 02:07:57,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 02:07:57,031 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:57,031 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:57,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-07 02:07:57,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:57,232 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:07:57,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:57,232 INFO L85 PathProgramCache]: Analyzing trace with hash -2011951106, now seen corresponding path program 1 times [2021-11-07 02:07:57,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:57,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [316955538] [2021-11-07 02:07:57,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:57,233 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:57,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:57,234 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:57,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:07:58,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:58,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:58,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:58,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:58,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:58,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:58,723 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:58,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [316955538] [2021-11-07 02:07:58,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [316955538] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:58,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:58,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:07:58,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395969946] [2021-11-07 02:07:58,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:58,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:58,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:58,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:58,725 INFO L87 Difference]: Start difference. First operand 38119 states and 68004 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:02,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:02,603 INFO L93 Difference]: Finished difference Result 105945 states and 188640 transitions. [2021-11-07 02:08:02,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:08:02,605 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 02:08:02,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:02,896 INFO L225 Difference]: With dead ends: 105945 [2021-11-07 02:08:02,896 INFO L226 Difference]: Without dead ends: 68045 [2021-11-07 02:08:02,929 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:08:02,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68045 states. [2021-11-07 02:08:07,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68045 to 67817. [2021-11-07 02:08:07,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67817 states, 67815 states have (on average 1.7747843397478433) internal successors, (120357), 67816 states have internal predecessors, (120357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:07,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67817 states to 67817 states and 120357 transitions. [2021-11-07 02:08:07,595 INFO L78 Accepts]: Start accepts. Automaton has 67817 states and 120357 transitions. Word has length 74 [2021-11-07 02:08:07,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:07,595 INFO L470 AbstractCegarLoop]: Abstraction has 67817 states and 120357 transitions. [2021-11-07 02:08:07,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:07,595 INFO L276 IsEmpty]: Start isEmpty. Operand 67817 states and 120357 transitions. [2021-11-07 02:08:07,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 02:08:07,605 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:07,606 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] [2021-11-07 02:08:07,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:07,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:07,808 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:08:07,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:07,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1387090491, now seen corresponding path program 1 times [2021-11-07 02:08:07,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:07,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [119430927] [2021-11-07 02:08:07,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:07,810 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:07,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:07,812 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:07,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:08:08,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:08,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:08:08,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:09,025 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:09,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:09,334 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:09,334 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:09,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [119430927] [2021-11-07 02:08:09,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [119430927] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:09,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1165886795] [2021-11-07 02:08:09,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:09,336 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:09,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:09,348 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:09,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9eabe366-36f6-4fec-9241-924ecb71d53b/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 02:08:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:10,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:08:10,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:11,058 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:08:11,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:11,396 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:08:11,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1165886795] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:11,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:08:11,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 02:08:11,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15049635] [2021-11-07 02:08:11,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:08:11,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:11,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:08:11,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:08:11,399 INFO L87 Difference]: Start difference. First operand 67817 states and 120357 transitions. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)