./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec6_product12.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_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/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_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec6_product12.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/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_874f133a-80a5-4f28-a965-0b1667b0a32a/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 6a023004d1923934c700fbd43377f50b99f9b3dcadd2a9eb1f89b20b18aa1436 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:12:11,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:12:11,864 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:12:11,908 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:12:11,909 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:12:11,910 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:12:11,913 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:12:11,916 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:12:11,924 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:12:11,926 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:12:11,928 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:12:11,932 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:12:11,933 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:12:11,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:12:11,942 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:12:11,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:12:11,950 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:12:11,952 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:12:11,955 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:12:11,959 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:12:11,966 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:12:11,968 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:12:11,970 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:12:11,973 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:12:11,979 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:12:11,991 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:12:11,992 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:12:11,993 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:12:11,994 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:12:11,996 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:12:11,996 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:12:11,998 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:12:11,999 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:12:12,000 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:12:12,002 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:12:12,002 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:12:12,003 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:12:12,004 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:12:12,004 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:12:12,006 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:12:12,007 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:12:12,008 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:12:12,042 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:12:12,043 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:12:12,044 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:12:12,045 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:12:12,046 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:12:12,046 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:12:12,047 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:12:12,047 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:12:12,048 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:12:12,048 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:12:12,048 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:12:12,049 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:12:12,049 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:12:12,050 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:12:12,050 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:12:12,051 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:12:12,052 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:12:12,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:12:12,053 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:12:12,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:12:12,053 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:12:12,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:12:12,054 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:12:12,054 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:12:12,054 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:12:12,055 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:12:12,055 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:12:12,055 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:12:12,056 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:12:12,056 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:12:12,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:12:12,057 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:12:12,057 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:12:12,057 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:12:12,058 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:12:12,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:12:12,058 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:12:12,059 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:12:12,059 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:12:12,059 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_874f133a-80a5-4f28-a965-0b1667b0a32a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6a023004d1923934c700fbd43377f50b99f9b3dcadd2a9eb1f89b20b18aa1436 [2021-11-07 02:12:12,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:12:12,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:12:12,430 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:12:12,431 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:12:12,432 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:12:12,434 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec6_product12.cil.c [2021-11-07 02:12:12,518 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/data/92b0cd45d/e196397238204bb7914a6e68301739c3/FLAG531b50ada [2021-11-07 02:12:13,305 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:12:13,306 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/sv-benchmarks/c/product-lines/email_spec6_product12.cil.c [2021-11-07 02:12:13,335 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/data/92b0cd45d/e196397238204bb7914a6e68301739c3/FLAG531b50ada [2021-11-07 02:12:13,437 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/data/92b0cd45d/e196397238204bb7914a6e68301739c3 [2021-11-07 02:12:13,440 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:12:13,442 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:12:13,444 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:12:13,445 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:12:13,449 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:12:13,450 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:12:13" (1/1) ... [2021-11-07 02:12:13,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36fab62d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:13, skipping insertion in model container [2021-11-07 02:12:13,451 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:12:13" (1/1) ... [2021-11-07 02:12:13,460 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:12:13,584 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:12:14,344 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_874f133a-80a5-4f28-a965-0b1667b0a32a/sv-benchmarks/c/product-lines/email_spec6_product12.cil.c[52000,52013] [2021-11-07 02:12:14,378 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:12:14,393 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 02:12:14,394 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1feb3c5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:14, skipping insertion in model container [2021-11-07 02:12:14,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:12:14,395 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:12:14,398 INFO L168 Benchmark]: Toolchain (without parser) took 953.64 ms. Allocated memory was 92.3 MB in the beginning and 121.6 MB in the end (delta: 29.4 MB). Free memory was 52.8 MB in the beginning and 85.7 MB in the end (delta: -32.9 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. [2021-11-07 02:12:14,398 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 92.3 MB. Free memory is still 71.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:12:14,400 INFO L168 Benchmark]: CACSL2BoogieTranslator took 950.51 ms. Allocated memory was 92.3 MB in the beginning and 121.6 MB in the end (delta: 29.4 MB). Free memory was 52.5 MB in the beginning and 85.7 MB in the end (delta: -33.2 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. [2021-11-07 02:12:14,402 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 92.3 MB. Free memory is still 71.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 950.51 ms. Allocated memory was 92.3 MB in the beginning and 121.6 MB in the end (delta: 29.4 MB). Free memory was 52.5 MB in the beginning and 85.7 MB in the end (delta: -33.2 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 239]: 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_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/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_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec6_product12.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/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_874f133a-80a5-4f28-a965-0b1667b0a32a/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 6a023004d1923934c700fbd43377f50b99f9b3dcadd2a9eb1f89b20b18aa1436 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:12:17,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:12:17,129 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:12:17,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:12:17,176 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:12:17,184 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:12:17,188 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:12:17,198 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:12:17,202 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:12:17,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:12:17,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:12:17,218 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:12:17,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:12:17,220 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:12:17,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:12:17,224 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:12:17,225 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:12:17,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:12:17,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:12:17,232 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:12:17,234 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:12:17,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:12:17,238 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:12:17,239 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:12:17,244 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:12:17,245 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:12:17,245 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:12:17,246 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:12:17,247 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:12:17,253 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:12:17,253 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:12:17,255 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:12:17,257 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:12:17,258 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:12:17,261 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:12:17,262 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:12:17,263 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:12:17,263 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:12:17,283 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:12:17,285 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:12:17,286 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:12:17,288 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:12:17,324 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:12:17,324 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:12:17,325 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:12:17,325 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:12:17,326 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:12:17,326 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:12:17,326 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:12:17,327 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:12:17,327 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:12:17,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:12:17,328 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:12:17,328 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:12:17,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:12:17,329 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:12:17,329 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:12:17,329 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:12:17,330 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:12:17,330 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:12:17,330 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:12:17,330 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:12:17,331 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:12:17,331 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:12:17,331 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:12:17,332 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:12:17,332 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:12:17,332 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:12:17,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:12:17,333 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:12:17,333 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:12:17,333 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:12:17,333 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:12:17,334 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:12:17,336 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:12:17,336 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:12:17,336 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:12:17,337 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_874f133a-80a5-4f28-a965-0b1667b0a32a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6a023004d1923934c700fbd43377f50b99f9b3dcadd2a9eb1f89b20b18aa1436 [2021-11-07 02:12:17,848 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:12:17,883 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:12:17,886 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:12:17,888 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:12:17,890 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:12:17,891 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec6_product12.cil.c [2021-11-07 02:12:17,983 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/data/699359fca/c64c33b136184e51ad7f926ab0710940/FLAG7615480bb [2021-11-07 02:12:18,854 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:12:18,855 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/sv-benchmarks/c/product-lines/email_spec6_product12.cil.c [2021-11-07 02:12:18,894 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/data/699359fca/c64c33b136184e51ad7f926ab0710940/FLAG7615480bb [2021-11-07 02:12:18,975 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/data/699359fca/c64c33b136184e51ad7f926ab0710940 [2021-11-07 02:12:18,978 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:12:18,980 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:12:18,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:12:18,989 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:12:18,993 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:12:18,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:12:18" (1/1) ... [2021-11-07 02:12:18,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1392d869 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:18, skipping insertion in model container [2021-11-07 02:12:18,997 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:12:18" (1/1) ... [2021-11-07 02:12:19,006 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:12:19,114 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:12:19,837 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/sv-benchmarks/c/product-lines/email_spec6_product12.cil.c[52000,52013] [2021-11-07 02:12:19,891 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:12:19,923 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:12:19,944 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:12:20,107 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/sv-benchmarks/c/product-lines/email_spec6_product12.cil.c[52000,52013] [2021-11-07 02:12:20,125 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:12:20,134 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:12:20,275 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_874f133a-80a5-4f28-a965-0b1667b0a32a/sv-benchmarks/c/product-lines/email_spec6_product12.cil.c[52000,52013] [2021-11-07 02:12:20,289 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:12:20,332 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:12:20,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:20 WrapperNode [2021-11-07 02:12:20,333 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:12:20,334 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:12:20,335 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:12:20,335 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:12:20,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:20" (1/1) ... [2021-11-07 02:12:20,384 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:20" (1/1) ... [2021-11-07 02:12:20,499 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:12:20,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:12:20,501 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:12:20,501 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:12:20,512 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:20" (1/1) ... [2021-11-07 02:12:20,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:20" (1/1) ... [2021-11-07 02:12:20,533 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:20" (1/1) ... [2021-11-07 02:12:20,533 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:20" (1/1) ... [2021-11-07 02:12:20,575 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:20" (1/1) ... [2021-11-07 02:12:20,600 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:20" (1/1) ... [2021-11-07 02:12:20,607 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:20" (1/1) ... [2021-11-07 02:12:20,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:12:20,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:12:20,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:12:20,623 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:12:20,624 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:20" (1/1) ... [2021-11-07 02:12:20,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:12:20,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:12:20,674 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:12:20,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:12:20,770 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 02:12:20,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:12:20,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:12:20,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:12:20,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:12:25,395 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:12:25,395 INFO L299 CfgBuilder]: Removed 239 assume(true) statements. [2021-11-07 02:12:25,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:12:25 BoogieIcfgContainer [2021-11-07 02:12:25,402 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:12:25,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:12:25,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:12:25,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:12:25,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:12:18" (1/3) ... [2021-11-07 02:12:25,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@145d763a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:12:25, skipping insertion in model container [2021-11-07 02:12:25,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:12:20" (2/3) ... [2021-11-07 02:12:25,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@145d763a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:12:25, skipping insertion in model container [2021-11-07 02:12:25,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:12:25" (3/3) ... [2021-11-07 02:12:25,415 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec6_product12.cil.c [2021-11-07 02:12:25,421 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:12:25,422 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 02:12:25,504 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:12:25,517 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 02:12:25,517 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 02:12:25,558 INFO L276 IsEmpty]: Start isEmpty. Operand has 397 states, 394 states have (on average 1.7690355329949239) internal successors, (697), 396 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:25,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 02:12:25,592 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:25,593 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 02:12:25,594 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:12:25,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:25,600 INFO L85 PathProgramCache]: Analyzing trace with hash -637206871, now seen corresponding path program 1 times [2021-11-07 02:12:25,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:25,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [691294626] [2021-11-07 02:12:25,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:25,619 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:25,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:25,623 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:25,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:12:26,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:26,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:12:26,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:26,541 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 02:12:26,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:26,701 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 02:12:26,702 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:12:26,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [691294626] [2021-11-07 02:12:26,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [691294626] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:12:26,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:12:26,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:12:26,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772381725] [2021-11-07 02:12:26,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:12:26,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:12:26,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:12:26,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:12:26,740 INFO L87 Difference]: Start difference. First operand has 397 states, 394 states have (on average 1.7690355329949239) internal successors, (697), 396 states have internal predecessors, (697), 0 states have call successors, (0), 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 25.0) internal successors, (50), 2 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 02:12:26,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:26,812 INFO L93 Difference]: Finished difference Result 556 states and 960 transitions. [2021-11-07 02:12:26,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:12:26,814 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 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 50 [2021-11-07 02:12:26,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:26,838 INFO L225 Difference]: With dead ends: 556 [2021-11-07 02:12:26,839 INFO L226 Difference]: Without dead ends: 370 [2021-11-07 02:12:26,843 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 98 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 02:12:26,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-11-07 02:12:26,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 370. [2021-11-07 02:12:26,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 368 states have (on average 1.7581521739130435) internal successors, (647), 369 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:26,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 647 transitions. [2021-11-07 02:12:26,981 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 647 transitions. Word has length 50 [2021-11-07 02:12:26,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:26,982 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 647 transitions. [2021-11-07 02:12:26,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 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 02:12:26,983 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 647 transitions. [2021-11-07 02:12:26,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 02:12:26,996 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:26,996 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 02:12:27,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:27,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:12:27,215 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:12:27,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:27,216 INFO L85 PathProgramCache]: Analyzing trace with hash 2071426421, now seen corresponding path program 1 times [2021-11-07 02:12:27,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:27,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1893962067] [2021-11-07 02:12:27,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:27,218 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:27,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:27,222 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:27,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:12:27,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:27,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:12:27,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:27,918 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 02:12:27,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:28,095 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 02:12:28,095 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:12:28,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1893962067] [2021-11-07 02:12:28,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1893962067] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:12:28,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:12:28,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:12:28,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439945160] [2021-11-07 02:12:28,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:12:28,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:12:28,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:12:28,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:12:28,101 INFO L87 Difference]: Start difference. First operand 370 states and 647 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:28,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:28,259 INFO L93 Difference]: Finished difference Result 1080 states and 1893 transitions. [2021-11-07 02:12:28,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:12:28,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 02:12:28,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:28,270 INFO L225 Difference]: With dead ends: 1080 [2021-11-07 02:12:28,271 INFO L226 Difference]: Without dead ends: 725 [2021-11-07 02:12:28,279 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 02:12:28,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-11-07 02:12:28,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 369. [2021-11-07 02:12:28,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 367 states have (on average 1.7493188010899183) internal successors, (642), 368 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:28,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 642 transitions. [2021-11-07 02:12:28,347 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 642 transitions. Word has length 51 [2021-11-07 02:12:28,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:28,348 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 642 transitions. [2021-11-07 02:12:28,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:28,348 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 642 transitions. [2021-11-07 02:12:28,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 02:12:28,362 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:28,362 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:12:28,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:28,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:12:28,585 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:12:28,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:28,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1528375461, now seen corresponding path program 1 times [2021-11-07 02:12:28,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:28,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1540859327] [2021-11-07 02:12:28,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:28,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:28,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:28,589 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:28,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:12:29,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:29,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:12:29,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:29,297 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 02:12:29,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:29,511 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 02:12:29,511 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:12:29,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1540859327] [2021-11-07 02:12:29,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1540859327] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:12:29,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:12:29,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:12:29,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887169082] [2021-11-07 02:12:29,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:12:29,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:12:29,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:12:29,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:12:29,525 INFO L87 Difference]: Start difference. First operand 369 states and 642 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 02:12:29,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:29,798 INFO L93 Difference]: Finished difference Result 1393 states and 2430 transitions. [2021-11-07 02:12:29,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:12:29,799 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 53 [2021-11-07 02:12:29,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:29,810 INFO L225 Difference]: With dead ends: 1393 [2021-11-07 02:12:29,810 INFO L226 Difference]: Without dead ends: 1042 [2021-11-07 02:12:29,812 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 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 02:12:29,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-11-07 02:12:29,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 368. [2021-11-07 02:12:29,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 366 states have (on average 1.7431693989071038) internal successors, (638), 367 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:29,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 638 transitions. [2021-11-07 02:12:29,858 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 638 transitions. Word has length 53 [2021-11-07 02:12:29,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:29,858 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 638 transitions. [2021-11-07 02:12:29,860 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 02:12:29,860 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 638 transitions. [2021-11-07 02:12:29,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 02:12:29,862 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:29,862 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 02:12:29,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:30,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:12:30,085 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:12:30,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:30,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1395913262, now seen corresponding path program 1 times [2021-11-07 02:12:30,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:30,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2042063468] [2021-11-07 02:12:30,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:30,087 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:30,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:30,089 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:30,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:12:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:30,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:12:30,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:30,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:30,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:30,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:30,950 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:12:30,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2042063468] [2021-11-07 02:12:30,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2042063468] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:12:30,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:12:30,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:12:30,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812734316] [2021-11-07 02:12:30,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:12:30,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:12:30,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:12:30,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:12:30,953 INFO L87 Difference]: Start difference. First operand 368 states and 638 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 02:12:31,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:31,032 INFO L93 Difference]: Finished difference Result 733 states and 1273 transitions. [2021-11-07 02:12:31,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:12:31,033 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 02:12:31,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:31,037 INFO L225 Difference]: With dead ends: 733 [2021-11-07 02:12:31,037 INFO L226 Difference]: Without dead ends: 373 [2021-11-07 02:12:31,038 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 02:12:31,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-11-07 02:12:31,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 368. [2021-11-07 02:12:31,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 366 states have (on average 1.7349726775956285) internal successors, (635), 367 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:31,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 635 transitions. [2021-11-07 02:12:31,069 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 635 transitions. Word has length 54 [2021-11-07 02:12:31,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:31,069 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 635 transitions. [2021-11-07 02:12:31,070 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 02:12:31,070 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 635 transitions. [2021-11-07 02:12:31,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 02:12:31,072 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:31,072 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:12:31,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:31,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:12:31,289 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:12:31,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:31,289 INFO L85 PathProgramCache]: Analyzing trace with hash -237422525, now seen corresponding path program 1 times [2021-11-07 02:12:31,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:31,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [352875843] [2021-11-07 02:12:31,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:31,291 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:31,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:31,292 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:31,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:12:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:31,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:12:31,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:32,019 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 02:12:32,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:32,189 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 02:12:32,189 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:12:32,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [352875843] [2021-11-07 02:12:32,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [352875843] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:12:32,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:12:32,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:12:32,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856741236] [2021-11-07 02:12:32,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:12:32,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:12:32,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:12:32,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:12:32,193 INFO L87 Difference]: Start difference. First operand 368 states and 635 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:32,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:32,459 INFO L93 Difference]: Finished difference Result 1380 states and 2406 transitions. [2021-11-07 02:12:32,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:12:32,460 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 02:12:32,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:32,470 INFO L225 Difference]: With dead ends: 1380 [2021-11-07 02:12:32,470 INFO L226 Difference]: Without dead ends: 1038 [2021-11-07 02:12:32,472 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 104 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 02:12:32,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-11-07 02:12:32,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 368. [2021-11-07 02:12:32,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 366 states have (on average 1.726775956284153) internal successors, (632), 367 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:32,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 632 transitions. [2021-11-07 02:12:32,517 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 632 transitions. Word has length 55 [2021-11-07 02:12:32,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:32,518 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 632 transitions. [2021-11-07 02:12:32,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:32,518 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 632 transitions. [2021-11-07 02:12:32,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 02:12:32,520 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:32,520 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:12:32,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-07 02:12:32,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:12:32,737 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:12:32,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:32,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1515981186, now seen corresponding path program 1 times [2021-11-07 02:12:32,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:32,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [466743488] [2021-11-07 02:12:32,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:32,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:32,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:32,743 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:32,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:12:33,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:33,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:12:33,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:33,552 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 02:12:33,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:33,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:33,740 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:12:33,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [466743488] [2021-11-07 02:12:33,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [466743488] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:12:33,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:12:33,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:12:33,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638844993] [2021-11-07 02:12:33,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:12:33,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:12:33,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:12:33,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:12:33,744 INFO L87 Difference]: Start difference. First operand 368 states and 632 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:33,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:33,860 INFO L93 Difference]: Finished difference Result 842 states and 1450 transitions. [2021-11-07 02:12:33,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:12:33,860 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 02:12:33,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:33,867 INFO L225 Difference]: With dead ends: 842 [2021-11-07 02:12:33,867 INFO L226 Difference]: Without dead ends: 710 [2021-11-07 02:12:33,868 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:12:33,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-11-07 02:12:33,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 578. [2021-11-07 02:12:33,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 576 states have (on average 1.7638888888888888) internal successors, (1016), 577 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:33,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1016 transitions. [2021-11-07 02:12:33,937 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1016 transitions. Word has length 57 [2021-11-07 02:12:33,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:33,937 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 1016 transitions. [2021-11-07 02:12:33,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:33,938 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1016 transitions. [2021-11-07 02:12:33,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 02:12:33,940 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:33,940 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 02:12:33,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:34,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:12:34,157 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:12:34,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:34,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1882402223, now seen corresponding path program 1 times [2021-11-07 02:12:34,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:34,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [122096577] [2021-11-07 02:12:34,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:34,159 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:34,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:34,160 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:34,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:12:34,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:34,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:12:34,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:34,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:34,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:35,114 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 02:12:35,114 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:12:35,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [122096577] [2021-11-07 02:12:35,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [122096577] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:12:35,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:12:35,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:12:35,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117358269] [2021-11-07 02:12:35,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:12:35,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:12:35,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:12:35,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:12:35,117 INFO L87 Difference]: Start difference. First operand 578 states and 1016 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 02:12:35,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:35,208 INFO L93 Difference]: Finished difference Result 1362 states and 2403 transitions. [2021-11-07 02:12:35,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:12:35,209 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 02:12:35,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:35,216 INFO L225 Difference]: With dead ends: 1362 [2021-11-07 02:12:35,216 INFO L226 Difference]: Without dead ends: 868 [2021-11-07 02:12:35,218 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 02:12:35,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-11-07 02:12:35,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 736. [2021-11-07 02:12:35,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 734 states have (on average 1.7752043596730245) internal successors, (1303), 735 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:35,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1303 transitions. [2021-11-07 02:12:35,298 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1303 transitions. Word has length 69 [2021-11-07 02:12:35,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:35,298 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 1303 transitions. [2021-11-07 02:12:35,299 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 02:12:35,299 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1303 transitions. [2021-11-07 02:12:35,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 02:12:35,301 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:35,302 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 02:12:35,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:35,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:12:35,516 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:12:35,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:35,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1384425038, now seen corresponding path program 1 times [2021-11-07 02:12:35,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:35,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [107821439] [2021-11-07 02:12:35,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:35,517 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:35,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:35,518 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:35,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:12:36,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:36,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:12:36,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:36,241 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 02:12:36,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:36,432 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 02:12:36,433 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:12:36,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [107821439] [2021-11-07 02:12:36,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [107821439] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:12:36,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:12:36,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:12:36,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613643544] [2021-11-07 02:12:36,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:12:36,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:12:36,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:12:36,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:12:36,435 INFO L87 Difference]: Start difference. First operand 736 states and 1303 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 02:12:36,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:36,555 INFO L93 Difference]: Finished difference Result 1880 states and 3350 transitions. [2021-11-07 02:12:36,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:12:36,556 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 02:12:36,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:36,566 INFO L225 Difference]: With dead ends: 1880 [2021-11-07 02:12:36,566 INFO L226 Difference]: Without dead ends: 1232 [2021-11-07 02:12:36,568 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 02:12:36,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2021-11-07 02:12:36,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 1100. [2021-11-07 02:12:36,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 1098 states have (on average 1.7914389799635702) internal successors, (1967), 1099 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:36,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1967 transitions. [2021-11-07 02:12:36,713 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1967 transitions. Word has length 70 [2021-11-07 02:12:36,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:36,714 INFO L470 AbstractCegarLoop]: Abstraction has 1100 states and 1967 transitions. [2021-11-07 02:12:36,714 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 02:12:36,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1967 transitions. [2021-11-07 02:12:36,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 02:12:36,718 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:36,718 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:12:36,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:36,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:12:36,942 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:12:36,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:36,943 INFO L85 PathProgramCache]: Analyzing trace with hash -294427682, now seen corresponding path program 1 times [2021-11-07 02:12:36,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:36,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725173981] [2021-11-07 02:12:36,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:36,944 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:36,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:36,946 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:36,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:12:37,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:37,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:12:37,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:37,830 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:37,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:38,046 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:38,047 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:12:38,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725173981] [2021-11-07 02:12:38,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [725173981] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:12:38,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:12:38,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:12:38,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108686815] [2021-11-07 02:12:38,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:12:38,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:12:38,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:12:38,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:12:38,050 INFO L87 Difference]: Start difference. First operand 1100 states and 1967 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:38,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:38,185 INFO L93 Difference]: Finished difference Result 2090 states and 3731 transitions. [2021-11-07 02:12:38,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:12:38,185 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 02:12:38,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:38,194 INFO L225 Difference]: With dead ends: 2090 [2021-11-07 02:12:38,194 INFO L226 Difference]: Without dead ends: 1232 [2021-11-07 02:12:38,196 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:12:38,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2021-11-07 02:12:38,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 1100. [2021-11-07 02:12:38,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 1098 states have (on average 1.789617486338798) internal successors, (1965), 1099 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:38,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1965 transitions. [2021-11-07 02:12:38,304 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1965 transitions. Word has length 71 [2021-11-07 02:12:38,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:38,305 INFO L470 AbstractCegarLoop]: Abstraction has 1100 states and 1965 transitions. [2021-11-07 02:12:38,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:38,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1965 transitions. [2021-11-07 02:12:38,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 02:12:38,315 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:38,315 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 02:12:38,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:38,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:12:38,528 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:12:38,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:38,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1604943709, now seen corresponding path program 1 times [2021-11-07 02:12:38,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:38,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1402781978] [2021-11-07 02:12:38,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:38,529 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:38,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:38,530 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:38,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:12:39,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:39,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:12:39,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:39,346 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 02:12:39,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:39,533 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 02:12:39,533 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:12:39,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1402781978] [2021-11-07 02:12:39,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1402781978] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:12:39,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:12:39,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:12:39,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360245855] [2021-11-07 02:12:39,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:12:39,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:12:39,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:12:39,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:12:39,535 INFO L87 Difference]: Start difference. First operand 1100 states and 1965 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 02:12:39,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:39,743 INFO L93 Difference]: Finished difference Result 2944 states and 5291 transitions. [2021-11-07 02:12:39,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:12:39,744 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 02:12:39,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:39,760 INFO L225 Difference]: With dead ends: 2944 [2021-11-07 02:12:39,760 INFO L226 Difference]: Without dead ends: 1940 [2021-11-07 02:12:39,762 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 02:12:39,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-11-07 02:12:39,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1808. [2021-11-07 02:12:39,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1808 states, 1806 states have (on average 1.8028792912513842) internal successors, (3256), 1807 states have internal predecessors, (3256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:39,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1808 states to 1808 states and 3256 transitions. [2021-11-07 02:12:39,963 INFO L78 Accepts]: Start accepts. Automaton has 1808 states and 3256 transitions. Word has length 71 [2021-11-07 02:12:39,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:39,964 INFO L470 AbstractCegarLoop]: Abstraction has 1808 states and 3256 transitions. [2021-11-07 02:12:39,964 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 02:12:39,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1808 states and 3256 transitions. [2021-11-07 02:12:39,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 02:12:39,969 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:39,969 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 02:12:39,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:40,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:12:40,184 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:12:40,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:40,185 INFO L85 PathProgramCache]: Analyzing trace with hash 89181072, now seen corresponding path program 1 times [2021-11-07 02:12:40,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:40,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [353807689] [2021-11-07 02:12:40,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:40,186 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:40,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:40,188 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:40,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:12:40,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:40,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:12:40,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:41,103 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 02:12:41,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:41,312 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 02:12:41,312 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:12:41,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [353807689] [2021-11-07 02:12:41,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [353807689] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:12:41,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:12:41,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:12:41,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024979341] [2021-11-07 02:12:41,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:12:41,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:12:41,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:12:41,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:12:41,315 INFO L87 Difference]: Start difference. First operand 1808 states and 3256 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 02:12:41,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:41,609 INFO L93 Difference]: Finished difference Result 4804 states and 8683 transitions. [2021-11-07 02:12:41,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:12:41,610 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 02:12:41,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:41,635 INFO L225 Difference]: With dead ends: 4804 [2021-11-07 02:12:41,636 INFO L226 Difference]: Without dead ends: 3126 [2021-11-07 02:12:41,639 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 02:12:41,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-11-07 02:12:41,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 2994. [2021-11-07 02:12:41,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2994 states, 2992 states have (on average 1.8091577540106951) internal successors, (5413), 2993 states have internal predecessors, (5413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:41,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2994 states to 2994 states and 5413 transitions. [2021-11-07 02:12:41,946 INFO L78 Accepts]: Start accepts. Automaton has 2994 states and 5413 transitions. Word has length 72 [2021-11-07 02:12:41,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:41,947 INFO L470 AbstractCegarLoop]: Abstraction has 2994 states and 5413 transitions. [2021-11-07 02:12:41,948 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 02:12:41,948 INFO L276 IsEmpty]: Start isEmpty. Operand 2994 states and 5413 transitions. [2021-11-07 02:12:41,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 02:12:41,954 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:41,954 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 02:12:41,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:42,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:12:42,172 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:12:42,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:42,172 INFO L85 PathProgramCache]: Analyzing trace with hash -263831762, now seen corresponding path program 1 times [2021-11-07 02:12:42,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:42,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [360362421] [2021-11-07 02:12:42,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:42,173 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:42,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:42,174 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:42,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:12:42,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:42,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:12:42,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:43,007 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 02:12:43,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:43,217 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 02:12:43,217 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:12:43,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [360362421] [2021-11-07 02:12:43,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [360362421] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:12:43,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:12:43,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:12:43,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745663519] [2021-11-07 02:12:43,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:12:43,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:12:43,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:12:43,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:12:43,221 INFO L87 Difference]: Start difference. First operand 2994 states and 5413 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 02:12:43,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:43,681 INFO L93 Difference]: Finished difference Result 8078 states and 14637 transitions. [2021-11-07 02:12:43,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:12:43,682 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 02:12:43,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:43,725 INFO L225 Difference]: With dead ends: 8078 [2021-11-07 02:12:43,725 INFO L226 Difference]: Without dead ends: 5248 [2021-11-07 02:12:43,731 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 02:12:43,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5248 states. [2021-11-07 02:12:44,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5248 to 5116. [2021-11-07 02:12:44,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5116 states, 5114 states have (on average 1.8111067657411029) internal successors, (9262), 5115 states have internal predecessors, (9262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:44,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5116 states to 5116 states and 9262 transitions. [2021-11-07 02:12:44,251 INFO L78 Accepts]: Start accepts. Automaton has 5116 states and 9262 transitions. Word has length 73 [2021-11-07 02:12:44,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:44,251 INFO L470 AbstractCegarLoop]: Abstraction has 5116 states and 9262 transitions. [2021-11-07 02:12:44,251 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 02:12:44,252 INFO L276 IsEmpty]: Start isEmpty. Operand 5116 states and 9262 transitions. [2021-11-07 02:12:44,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 02:12:44,262 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:44,262 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 02:12:44,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:44,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:12:44,480 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:12:44,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:44,481 INFO L85 PathProgramCache]: Analyzing trace with hash -2006175182, now seen corresponding path program 1 times [2021-11-07 02:12:44,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:44,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [132948201] [2021-11-07 02:12:44,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:44,482 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:44,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:44,483 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:44,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:12:45,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:45,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:12:45,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:45,377 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 02:12:45,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:45,641 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 02:12:45,641 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:12:45,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [132948201] [2021-11-07 02:12:45,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [132948201] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:12:45,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:12:45,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:12:45,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523646934] [2021-11-07 02:12:45,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:12:45,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:12:45,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:12:45,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:12:45,644 INFO L87 Difference]: Start difference. First operand 5116 states and 9262 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:48,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:48,982 INFO L93 Difference]: Finished difference Result 19116 states and 34650 transitions. [2021-11-07 02:12:48,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:12:48,983 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 02:12:48,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:49,057 INFO L225 Difference]: With dead ends: 19116 [2021-11-07 02:12:49,058 INFO L226 Difference]: Without dead ends: 14240 [2021-11-07 02:12:49,069 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:12:49,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14240 states. [2021-11-07 02:12:49,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14240 to 5066. [2021-11-07 02:12:49,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5066 states, 5064 states have (on average 1.7894944707740916) internal successors, (9062), 5065 states have internal predecessors, (9062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:49,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5066 states to 5066 states and 9062 transitions. [2021-11-07 02:12:49,745 INFO L78 Accepts]: Start accepts. Automaton has 5066 states and 9062 transitions. Word has length 74 [2021-11-07 02:12:49,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:49,746 INFO L470 AbstractCegarLoop]: Abstraction has 5066 states and 9062 transitions. [2021-11-07 02:12:49,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:49,746 INFO L276 IsEmpty]: Start isEmpty. Operand 5066 states and 9062 transitions. [2021-11-07 02:12:49,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 02:12:49,753 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:49,754 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 02:12:49,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:49,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:12:49,973 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:12:49,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:49,974 INFO L85 PathProgramCache]: Analyzing trace with hash -806149759, now seen corresponding path program 1 times [2021-11-07 02:12:49,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:49,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1733123745] [2021-11-07 02:12:49,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:49,975 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:49,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:49,977 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:50,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:12:50,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:50,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:12:50,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:51,125 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 02:12:51,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:51,300 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 02:12:51,300 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:12:51,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1733123745] [2021-11-07 02:12:51,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1733123745] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:12:51,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:12:51,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:12:51,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480352743] [2021-11-07 02:12:51,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:12:51,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:12:51,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:12:51,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:12:51,302 INFO L87 Difference]: Start difference. First operand 5066 states and 9062 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 02:12:51,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:51,883 INFO L93 Difference]: Finished difference Result 14755 states and 26438 transitions. [2021-11-07 02:12:51,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:12:51,884 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 02:12:51,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:51,915 INFO L225 Difference]: With dead ends: 14755 [2021-11-07 02:12:51,915 INFO L226 Difference]: Without dead ends: 9856 [2021-11-07 02:12:51,925 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 02:12:51,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9856 states. [2021-11-07 02:12:52,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9856 to 9724. [2021-11-07 02:12:52,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9724 states, 9722 states have (on average 1.7896523349105122) internal successors, (17399), 9723 states have internal predecessors, (17399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:52,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9724 states to 9724 states and 17399 transitions. [2021-11-07 02:12:52,869 INFO L78 Accepts]: Start accepts. Automaton has 9724 states and 17399 transitions. Word has length 74 [2021-11-07 02:12:52,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:52,869 INFO L470 AbstractCegarLoop]: Abstraction has 9724 states and 17399 transitions. [2021-11-07 02:12:52,870 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 02:12:52,870 INFO L276 IsEmpty]: Start isEmpty. Operand 9724 states and 17399 transitions. [2021-11-07 02:12:52,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 02:12:52,881 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:52,881 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 02:12:52,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:53,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:12:53,097 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:12:53,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:53,098 INFO L85 PathProgramCache]: Analyzing trace with hash -212216211, now seen corresponding path program 1 times [2021-11-07 02:12:53,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:53,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [142055194] [2021-11-07 02:12:53,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:53,099 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:53,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:53,100 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:53,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:12:53,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:53,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:12:53,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:54,086 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 02:12:54,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:54,371 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 02:12:54,371 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:12:54,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [142055194] [2021-11-07 02:12:54,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [142055194] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:12:54,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1507986696] [2021-11-07 02:12:54,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:54,372 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:12:54,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:12:54,380 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:12:54,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 02:12:55,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:55,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 02:12:55,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:56,268 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 02:12:56,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:56,789 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 02:12:56,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1507986696] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:12:56,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:12:56,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 02:12:56,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97203428] [2021-11-07 02:12:56,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 02:12:56,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:12:56,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 02:12:56,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:12:56,793 INFO L87 Difference]: Start difference. First operand 9724 states and 17399 transitions. Second operand has 16 states, 16 states have (on average 7.3125) internal successors, (117), 15 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:17,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:17,461 INFO L93 Difference]: Finished difference Result 20130 states and 35873 transitions. [2021-11-07 02:13:17,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 02:13:17,462 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.3125) internal successors, (117), 15 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 02:13:17,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:17,527 INFO L225 Difference]: With dead ends: 20130 [2021-11-07 02:13:17,527 INFO L226 Difference]: Without dead ends: 20018 [2021-11-07 02:13:17,534 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2021-11-07 02:13:17,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20018 states. [2021-11-07 02:13:18,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20018 to 19240. [2021-11-07 02:13:18,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19240 states, 19238 states have (on average 1.7911425304085664) internal successors, (34458), 19239 states have internal predecessors, (34458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:18,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19240 states to 19240 states and 34458 transitions. [2021-11-07 02:13:18,644 INFO L78 Accepts]: Start accepts. Automaton has 19240 states and 34458 transitions. Word has length 75 [2021-11-07 02:13:18,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:18,645 INFO L470 AbstractCegarLoop]: Abstraction has 19240 states and 34458 transitions. [2021-11-07 02:13:18,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.3125) internal successors, (117), 15 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:18,645 INFO L276 IsEmpty]: Start isEmpty. Operand 19240 states and 34458 transitions. [2021-11-07 02:13:18,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 02:13:18,665 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:18,666 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:13:18,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:18,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:19,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:13:19,086 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:13:19,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:19,086 INFO L85 PathProgramCache]: Analyzing trace with hash -924760276, now seen corresponding path program 1 times [2021-11-07 02:13:19,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:19,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [800804266] [2021-11-07 02:13:19,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:19,087 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:19,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:19,088 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:19,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:13:20,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:20,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:13:20,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:20,331 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 02:13:20,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:20,617 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 02:13:20,617 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:20,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [800804266] [2021-11-07 02:13:20,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [800804266] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:13:20,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [197584409] [2021-11-07 02:13:20,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:20,618 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:13:20,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:13:20,619 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:13:20,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 02:13:21,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:21,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 02:13:21,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:22,463 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 02:13:22,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:22,938 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 02:13:22,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [197584409] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:22,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:13:22,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 02:13:22,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242736429] [2021-11-07 02:13:22,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 02:13:22,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:22,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 02:13:22,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:13:22,941 INFO L87 Difference]: Start difference. First operand 19240 states and 34458 transitions. Second operand has 16 states, 16 states have (on average 7.4375) internal successors, (119), 15 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:37,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:37,236 INFO L93 Difference]: Finished difference Result 39466 states and 70475 transitions. [2021-11-07 02:13:37,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 02:13:37,236 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.4375) internal successors, (119), 15 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 02:13:37,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:37,322 INFO L225 Difference]: With dead ends: 39466 [2021-11-07 02:13:37,323 INFO L226 Difference]: Without dead ends: 39288 [2021-11-07 02:13:37,332 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2021-11-07 02:13:37,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39288 states. [2021-11-07 02:13:39,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39288 to 38191. [2021-11-07 02:13:39,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38191 states, 38189 states have (on average 1.7919819843410407) internal successors, (68434), 38190 states have internal predecessors, (68434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:39,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38191 states to 38191 states and 68434 transitions. [2021-11-07 02:13:39,556 INFO L78 Accepts]: Start accepts. Automaton has 38191 states and 68434 transitions. Word has length 76 [2021-11-07 02:13:39,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:39,556 INFO L470 AbstractCegarLoop]: Abstraction has 38191 states and 68434 transitions. [2021-11-07 02:13:39,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.4375) internal successors, (119), 15 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:39,557 INFO L276 IsEmpty]: Start isEmpty. Operand 38191 states and 68434 transitions. [2021-11-07 02:13:39,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 02:13:39,600 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:39,600 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:13:39,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:39,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:40,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:13:40,009 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:13:40,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:40,009 INFO L85 PathProgramCache]: Analyzing trace with hash -705905558, now seen corresponding path program 1 times [2021-11-07 02:13:40,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:40,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1284467241] [2021-11-07 02:13:40,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:40,010 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:40,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:40,011 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:40,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:13:40,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:40,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:13:40,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:40,991 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 02:13:40,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:41,209 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 02:13:41,209 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:41,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1284467241] [2021-11-07 02:13:41,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1284467241] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:13:41,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1524676953] [2021-11-07 02:13:41,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:41,209 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:13:41,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:13:41,210 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:13:41,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 02:13:42,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:42,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:13:42,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:42,531 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 02:13:42,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:42,804 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 02:13:42,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1524676953] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:42,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:13:42,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 14 [2021-11-07 02:13:42,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049571304] [2021-11-07 02:13:42,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:13:42,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:42,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:13:42,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:13:42,807 INFO L87 Difference]: Start difference. First operand 38191 states and 68434 transitions. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:47,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:47,024 INFO L93 Difference]: Finished difference Result 40097 states and 71458 transitions. [2021-11-07 02:13:47,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:13:47,025 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 02:13:47,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:47,096 INFO L225 Difference]: With dead ends: 40097 [2021-11-07 02:13:47,096 INFO L226 Difference]: Without dead ends: 39862 [2021-11-07 02:13:47,106 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-11-07 02:13:47,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39862 states. [2021-11-07 02:13:49,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39862 to 38500. [2021-11-07 02:13:49,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38500 states, 38498 states have (on average 1.7902748194711413) internal successors, (68922), 38499 states have internal predecessors, (68922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:49,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38500 states to 38500 states and 68922 transitions. [2021-11-07 02:13:49,494 INFO L78 Accepts]: Start accepts. Automaton has 38500 states and 68922 transitions. Word has length 76 [2021-11-07 02:13:49,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:49,494 INFO L470 AbstractCegarLoop]: Abstraction has 38500 states and 68922 transitions. [2021-11-07 02:13:49,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:49,495 INFO L276 IsEmpty]: Start isEmpty. Operand 38500 states and 68922 transitions. [2021-11-07 02:13:49,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 02:13:49,523 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:49,523 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:13:49,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:49,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:49,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:13:49,929 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:13:49,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:49,929 INFO L85 PathProgramCache]: Analyzing trace with hash -309433965, now seen corresponding path program 1 times [2021-11-07 02:13:49,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:49,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [306464105] [2021-11-07 02:13:49,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:49,930 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:49,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:49,932 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:49,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 02:13:50,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:50,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:13:50,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:50,994 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 02:13:50,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:51,203 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 02:13:51,203 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:51,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [306464105] [2021-11-07 02:13:51,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [306464105] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:13:51,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [768494952] [2021-11-07 02:13:51,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:51,204 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:13:51,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:13:51,212 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:13:51,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 02:13:52,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:52,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 02:13:52,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:52,644 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 02:13:52,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:52,820 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 02:13:52,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [768494952] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:52,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:13:52,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5, 5] total 13 [2021-11-07 02:13:52,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861591584] [2021-11-07 02:13:52,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:13:52,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:52,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:13:52,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:13:52,822 INFO L87 Difference]: Start difference. First operand 38500 states and 68922 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 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 02:13:54,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:54,740 INFO L93 Difference]: Finished difference Result 39179 states and 69989 transitions. [2021-11-07 02:13:54,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:13:54,741 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 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 77 [2021-11-07 02:13:54,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:54,796 INFO L225 Difference]: With dead ends: 39179 [2021-11-07 02:13:54,796 INFO L226 Difference]: Without dead ends: 38659 [2021-11-07 02:13:54,805 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-11-07 02:13:54,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38659 states. [2021-11-07 02:13:56,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38659 to 38400. [2021-11-07 02:13:56,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38400 states, 38398 states have (on average 1.7905620084379394) internal successors, (68754), 38399 states have internal predecessors, (68754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:56,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38400 states to 38400 states and 68754 transitions. [2021-11-07 02:13:56,802 INFO L78 Accepts]: Start accepts. Automaton has 38400 states and 68754 transitions. Word has length 77 [2021-11-07 02:13:56,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:56,802 INFO L470 AbstractCegarLoop]: Abstraction has 38400 states and 68754 transitions. [2021-11-07 02:13:56,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 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 02:13:56,802 INFO L276 IsEmpty]: Start isEmpty. Operand 38400 states and 68754 transitions. [2021-11-07 02:13:56,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 02:13:56,837 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:56,837 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:13:56,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:57,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-11-07 02:13:57,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:13:57,252 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:13:57,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:57,253 INFO L85 PathProgramCache]: Analyzing trace with hash -352620991, now seen corresponding path program 1 times [2021-11-07 02:13:57,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:57,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [90955507] [2021-11-07 02:13:57,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:57,254 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:57,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:57,256 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:57,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 02:13:58,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:58,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:13:58,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:58,423 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 02:13:58,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:58,633 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 02:13:58,634 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:58,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [90955507] [2021-11-07 02:13:58,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [90955507] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:13:58,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2074498644] [2021-11-07 02:13:58,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:58,634 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:13:58,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:13:58,635 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:13:58,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-07 02:13:59,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:59,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:13:59,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:00,048 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 02:14:00,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:00,192 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 02:14:00,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2074498644] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:00,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:14:00,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 02:14:00,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479317137] [2021-11-07 02:14:00,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:14:00,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:00,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:14:00,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:14:00,194 INFO L87 Difference]: Start difference. First operand 38400 states and 68754 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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 02:14:02,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:02,151 INFO L93 Difference]: Finished difference Result 39434 states and 70342 transitions. [2021-11-07 02:14:02,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:14:02,151 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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 79 [2021-11-07 02:14:02,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:02,207 INFO L225 Difference]: With dead ends: 39434 [2021-11-07 02:14:02,207 INFO L226 Difference]: Without dead ends: 38922 [2021-11-07 02:14:02,215 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:14:02,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38922 states. [2021-11-07 02:14:04,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38922 to 38412. [2021-11-07 02:14:04,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38412 states, 38410 states have (on average 1.7903150221296538) internal successors, (68766), 38411 states have internal predecessors, (68766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:04,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38412 states to 38412 states and 68766 transitions. [2021-11-07 02:14:04,322 INFO L78 Accepts]: Start accepts. Automaton has 38412 states and 68766 transitions. Word has length 79 [2021-11-07 02:14:04,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:04,323 INFO L470 AbstractCegarLoop]: Abstraction has 38412 states and 68766 transitions. [2021-11-07 02:14:04,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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 02:14:04,323 INFO L276 IsEmpty]: Start isEmpty. Operand 38412 states and 68766 transitions. [2021-11-07 02:14:04,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 02:14:04,345 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:04,346 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:14:04,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2021-11-07 02:14:04,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:04,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:04,752 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:14:04,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:04,752 INFO L85 PathProgramCache]: Analyzing trace with hash -825762165, now seen corresponding path program 1 times [2021-11-07 02:14:04,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:04,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1671250196] [2021-11-07 02:14:04,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:04,753 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:04,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:04,754 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:04,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 02:14:05,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:05,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:14:05,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:05,943 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 02:14:05,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:06,167 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 02:14:06,168 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:06,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1671250196] [2021-11-07 02:14:06,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1671250196] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:14:06,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1519985875] [2021-11-07 02:14:06,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:06,168 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:14:06,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:14:06,169 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:14:06,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-07 02:14:07,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:07,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 02:14:07,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:08,342 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 02:14:08,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:08,715 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 02:14:08,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1519985875] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:08,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:14:08,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 02:14:08,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552020157] [2021-11-07 02:14:08,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 02:14:08,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:08,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 02:14:08,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:14:08,717 INFO L87 Difference]: Start difference. First operand 38412 states and 68766 transitions. Second operand has 16 states, 16 states have (on average 7.625) internal successors, (122), 15 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:24,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:24,723 INFO L93 Difference]: Finished difference Result 79844 states and 142226 transitions. [2021-11-07 02:14:24,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 02:14:24,723 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.625) internal successors, (122), 15 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 02:14:24,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:24,985 INFO L225 Difference]: With dead ends: 79844 [2021-11-07 02:14:24,985 INFO L226 Difference]: Without dead ends: 79320 [2021-11-07 02:14:25,000 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2021-11-07 02:14:25,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79320 states. [2021-11-07 02:14:28,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79320 to 76421. [2021-11-07 02:14:28,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76421 states, 76419 states have (on average 1.7908766144545205) internal successors, (136857), 76420 states have internal predecessors, (136857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:28,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76421 states to 76421 states and 136857 transitions. [2021-11-07 02:14:28,995 INFO L78 Accepts]: Start accepts. Automaton has 76421 states and 136857 transitions. Word has length 79 [2021-11-07 02:14:28,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:28,995 INFO L470 AbstractCegarLoop]: Abstraction has 76421 states and 136857 transitions. [2021-11-07 02:14:28,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.625) internal successors, (122), 15 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:28,995 INFO L276 IsEmpty]: Start isEmpty. Operand 76421 states and 136857 transitions. [2021-11-07 02:14:29,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 02:14:29,016 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:29,016 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:14:29,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:29,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:29,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:29,418 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:14:29,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:29,418 INFO L85 PathProgramCache]: Analyzing trace with hash 668151010, now seen corresponding path program 1 times [2021-11-07 02:14:29,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:29,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [672590725] [2021-11-07 02:14:29,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:29,419 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:29,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:29,420 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:29,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 02:14:30,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:30,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:14:30,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:30,681 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 02:14:30,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:30,936 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 02:14:30,936 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:30,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [672590725] [2021-11-07 02:14:30,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [672590725] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:14:30,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1534488794] [2021-11-07 02:14:30,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:30,936 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:14:30,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:14:30,938 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:14:30,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-07 02:14:32,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:32,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:14:32,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:32,795 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 02:14:32,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:32,944 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 02:14:32,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1534488794] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:32,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:14:32,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-07 02:14:32,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328190572] [2021-11-07 02:14:32,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:14:32,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:32,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:14:32,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:14:32,946 INFO L87 Difference]: Start difference. First operand 76421 states and 136857 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 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 02:14:36,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:36,125 INFO L93 Difference]: Finished difference Result 78097 states and 139514 transitions. [2021-11-07 02:14:36,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:14:36,125 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 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 79 [2021-11-07 02:14:36,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:36,249 INFO L225 Difference]: With dead ends: 78097 [2021-11-07 02:14:36,250 INFO L226 Difference]: Without dead ends: 77025 [2021-11-07 02:14:36,264 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:14:36,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77025 states. [2021-11-07 02:14:40,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77025 to 76381. [2021-11-07 02:14:40,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76381 states, 76379 states have (on average 1.7907540030636693) internal successors, (136776), 76380 states have internal predecessors, (136776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:14:40,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76381 states to 76381 states and 136776 transitions. [2021-11-07 02:14:40,636 INFO L78 Accepts]: Start accepts. Automaton has 76381 states and 136776 transitions. Word has length 79 [2021-11-07 02:14:40,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:40,637 INFO L470 AbstractCegarLoop]: Abstraction has 76381 states and 136776 transitions. [2021-11-07 02:14:40,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 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 02:14:40,637 INFO L276 IsEmpty]: Start isEmpty. Operand 76381 states and 136776 transitions. [2021-11-07 02:14:40,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 02:14:40,656 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:40,657 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:14:40,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:40,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:41,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:41,057 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:14:41,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:41,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1269420221, now seen corresponding path program 1 times [2021-11-07 02:14:41,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:41,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [375460336] [2021-11-07 02:14:41,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:41,058 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:41,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:41,060 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:41,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-07 02:14:42,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:42,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:14:42,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:42,360 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 02:14:42,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:42,578 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 02:14:42,578 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:42,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [375460336] [2021-11-07 02:14:42,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [375460336] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:14:42,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [784419630] [2021-11-07 02:14:42,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:42,579 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:14:42,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:14:42,579 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:14:42,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_874f133a-80a5-4f28-a965-0b1667b0a32a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-07 02:14:44,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:44,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:14:44,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:44,236 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 02:14:44,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:44,382 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 02:14:44,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [784419630] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:44,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:14:44,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 02:14:44,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695531484] [2021-11-07 02:14:44,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:14:44,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:44,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:14:44,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:14:44,384 INFO L87 Difference]: Start difference. First operand 76381 states and 136776 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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)