./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test9-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test9-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cb52e740550b0ec41396d39fc3beea75c2dcd7385105eaeaaabca1f449d4b319 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:03:21,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:03:21,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:03:21,858 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:03:21,859 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:03:21,864 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:03:21,866 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:03:21,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:03:21,873 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:03:21,880 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:03:21,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:03:21,882 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:03:21,883 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:03:21,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:03:21,887 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:03:21,891 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:03:21,894 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:03:21,898 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:03:21,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:03:21,902 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:03:21,908 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:03:21,910 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:03:21,911 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:03:21,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:03:21,919 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:03:21,919 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:03:21,920 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:03:21,922 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:03:21,922 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:03:21,924 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:03:21,924 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:03:21,925 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:03:21,927 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:03:21,928 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:03:21,930 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:03:21,930 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:03:21,931 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:03:21,931 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:03:21,931 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:03:21,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:03:21,933 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:03:21,934 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-25 18:03:21,958 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:03:21,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:03:21,959 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:03:21,959 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:03:21,960 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:03:21,960 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:03:21,960 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:03:21,960 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:03:21,960 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:03:21,961 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:03:21,961 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:03:21,961 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:03:21,961 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:03:21,961 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:03:21,962 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:03:21,962 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:03:21,962 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:03:21,962 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:03:21,963 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 18:03:21,963 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 18:03:21,963 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:03:21,963 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:03:21,964 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 18:03:21,964 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:03:21,964 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:03:21,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:03:21,964 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 18:03:21,964 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 18:03:21,965 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 18:03:21,965 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:03:21,965 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 18:03:21,965 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:03:21,965 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:03:21,966 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:03:21,966 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:03:21,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:03:21,966 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:03:21,966 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:03:21,967 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:03:21,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:03:21,967 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:03:21,967 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:03:21,967 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_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb52e740550b0ec41396d39fc3beea75c2dcd7385105eaeaaabca1f449d4b319 [2021-11-25 18:03:22,270 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:03:22,292 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:03:22,295 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:03:22,296 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:03:22,296 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:03:22,298 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test9-2.i [2021-11-25 18:03:22,376 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/data/6462cd4e8/c67f13183f7c4f139cb700e3e2323276/FLAG6c951ca3b [2021-11-25 18:03:23,164 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:03:23,165 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test9-2.i [2021-11-25 18:03:23,198 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/data/6462cd4e8/c67f13183f7c4f139cb700e3e2323276/FLAG6c951ca3b [2021-11-25 18:03:23,430 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/data/6462cd4e8/c67f13183f7c4f139cb700e3e2323276 [2021-11-25 18:03:23,433 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:03:23,435 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:03:23,438 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:03:23,438 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:03:23,442 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:03:23,442 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:03:23" (1/1) ... [2021-11-25 18:03:23,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e46812c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:23, skipping insertion in model container [2021-11-25 18:03:23,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:03:23" (1/1) ... [2021-11-25 18:03:23,452 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:03:23,543 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:03:24,130 WARN L230 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_fd048276-5914-4f73-bcd9-a9413feb4eeb/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test9-2.i[33021,33034] [2021-11-25 18:03:24,414 WARN L230 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_fd048276-5914-4f73-bcd9-a9413feb4eeb/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test9-2.i[84583,84596] [2021-11-25 18:03:24,427 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:03:24,436 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) [2021-11-25 18:03:24,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1372e889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:24, skipping insertion in model container [2021-11-25 18:03:24,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:03:24,437 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-25 18:03:24,439 INFO L158 Benchmark]: Toolchain (without parser) took 1003.34ms. Allocated memory is still 113.2MB. Free memory was 72.9MB in the beginning and 65.4MB in the end (delta: 7.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 18:03:24,440 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 113.2MB. Free memory was 83.2MB in the beginning and 83.2MB in the end (delta: 25.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 18:03:24,441 INFO L158 Benchmark]: CACSL2BoogieTranslator took 999.41ms. Allocated memory is still 113.2MB. Free memory was 72.5MB in the beginning and 65.4MB in the end (delta: 7.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 18:03:24,442 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 113.2MB. Free memory was 83.2MB in the beginning and 83.2MB in the end (delta: 25.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 999.41ms. Allocated memory is still 113.2MB. Free memory was 72.5MB in the beginning and 65.4MB in the end (delta: 7.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2221]: 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_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test9-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cb52e740550b0ec41396d39fc3beea75c2dcd7385105eaeaaabca1f449d4b319 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:03:26,528 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:03:26,532 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:03:26,583 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:03:26,584 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:03:26,588 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:03:26,590 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:03:26,594 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:03:26,597 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:03:26,604 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:03:26,605 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:03:26,607 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:03:26,607 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:03:26,609 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:03:26,611 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:03:26,615 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:03:26,616 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:03:26,617 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:03:26,619 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:03:26,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:03:26,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:03:26,629 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:03:26,632 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:03:26,633 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:03:26,641 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:03:26,642 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:03:26,642 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:03:26,644 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:03:26,644 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:03:26,645 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:03:26,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:03:26,646 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:03:26,648 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:03:26,649 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:03:26,650 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:03:26,650 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:03:26,651 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:03:26,651 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:03:26,659 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:03:26,660 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:03:26,661 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:03:26,662 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-25 18:03:26,702 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:03:26,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:03:26,703 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:03:26,703 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:03:26,704 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:03:26,704 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:03:26,704 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:03:26,704 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:03:26,705 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:03:26,705 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:03:26,706 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:03:26,706 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:03:26,707 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 18:03:26,707 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 18:03:26,707 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:03:26,708 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:03:26,708 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 18:03:26,708 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:03:26,708 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:03:26,708 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:03:26,709 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 18:03:26,709 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 18:03:26,709 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 18:03:26,709 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:03:26,709 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 18:03:26,709 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 18:03:26,710 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 18:03:26,710 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:03:26,710 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:03:26,710 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:03:26,711 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 18:03:26,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:03:26,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:03:26,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:03:26,712 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:03:26,712 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 18:03:26,712 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 18:03:26,712 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:03:26,712 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:03:26,713 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_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb52e740550b0ec41396d39fc3beea75c2dcd7385105eaeaaabca1f449d4b319 [2021-11-25 18:03:27,060 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:03:27,084 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:03:27,089 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:03:27,091 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:03:27,092 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:03:27,093 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test9-2.i [2021-11-25 18:03:27,157 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/data/8a9b4a0bb/afe30bd9bde346f5a4639fe56f1217c1/FLAG6921184e5 [2021-11-25 18:03:27,799 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:03:27,800 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test9-2.i [2021-11-25 18:03:27,837 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/data/8a9b4a0bb/afe30bd9bde346f5a4639fe56f1217c1/FLAG6921184e5 [2021-11-25 18:03:27,972 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/data/8a9b4a0bb/afe30bd9bde346f5a4639fe56f1217c1 [2021-11-25 18:03:27,975 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:03:27,977 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:03:27,980 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:03:27,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:03:27,985 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:03:27,986 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:03:27" (1/1) ... [2021-11-25 18:03:27,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ceef282 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:27, skipping insertion in model container [2021-11-25 18:03:27,987 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:03:27" (1/1) ... [2021-11-25 18:03:27,994 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:03:28,096 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:03:28,642 WARN L230 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_fd048276-5914-4f73-bcd9-a9413feb4eeb/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test9-2.i[33021,33034] [2021-11-25 18:03:28,980 WARN L230 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_fd048276-5914-4f73-bcd9-a9413feb4eeb/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test9-2.i[84583,84596] [2021-11-25 18:03:28,996 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:03:29,007 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-25 18:03:29,032 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:03:29,052 WARN L230 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_fd048276-5914-4f73-bcd9-a9413feb4eeb/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test9-2.i[33021,33034] [2021-11-25 18:03:29,270 WARN L230 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_fd048276-5914-4f73-bcd9-a9413feb4eeb/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test9-2.i[84583,84596] [2021-11-25 18:03:29,280 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:03:29,284 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:03:29,307 WARN L230 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_fd048276-5914-4f73-bcd9-a9413feb4eeb/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test9-2.i[33021,33034] [2021-11-25 18:03:29,388 WARN L230 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_fd048276-5914-4f73-bcd9-a9413feb4eeb/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test9-2.i[84583,84596] [2021-11-25 18:03:29,394 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:03:29,454 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:03:29,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:29 WrapperNode [2021-11-25 18:03:29,455 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:03:29,457 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:03:29,457 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:03:29,457 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:03:29,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:29" (1/1) ... [2021-11-25 18:03:29,521 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:29" (1/1) ... [2021-11-25 18:03:29,614 INFO L137 Inliner]: procedures = 180, calls = 781, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 3034 [2021-11-25 18:03:29,614 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:03:29,615 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:03:29,615 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:03:29,615 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:03:29,623 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:29" (1/1) ... [2021-11-25 18:03:29,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:29" (1/1) ... [2021-11-25 18:03:29,636 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:29" (1/1) ... [2021-11-25 18:03:29,636 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:29" (1/1) ... [2021-11-25 18:03:29,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:29" (1/1) ... [2021-11-25 18:03:29,781 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:29" (1/1) ... [2021-11-25 18:03:29,789 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:29" (1/1) ... [2021-11-25 18:03:29,802 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:03:29,803 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:03:29,803 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:03:29,803 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:03:29,804 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:29" (1/1) ... [2021-11-25 18:03:29,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:03:29,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:03:29,833 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:03:29,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:03:29,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-25 18:03:29,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-25 18:03:29,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 18:03:29,879 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 18:03:29,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-25 18:03:29,879 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-25 18:03:29,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:03:29,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:03:29,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:03:29,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:03:29,880 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-25 18:03:29,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:03:29,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:03:29,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-25 18:03:29,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-25 18:03:29,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:03:29,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:03:30,064 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:03:30,066 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:03:30,069 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-25 18:03:35,823 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:03:35,841 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:03:35,841 INFO L301 CfgBuilder]: Removed 63 assume(true) statements. [2021-11-25 18:03:35,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:03:35 BoogieIcfgContainer [2021-11-25 18:03:35,845 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:03:35,847 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:03:35,848 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:03:35,850 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:03:35,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:03:27" (1/3) ... [2021-11-25 18:03:35,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da7047e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:03:35, skipping insertion in model container [2021-11-25 18:03:35,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:29" (2/3) ... [2021-11-25 18:03:35,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da7047e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:03:35, skipping insertion in model container [2021-11-25 18:03:35,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:03:35" (3/3) ... [2021-11-25 18:03:35,853 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test9-2.i [2021-11-25 18:03:35,858 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:03:35,858 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 536 error locations. [2021-11-25 18:03:35,900 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:03:35,906 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-11-25 18:03:35,907 INFO L340 AbstractCegarLoop]: Starting to check reachability of 536 error locations. [2021-11-25 18:03:35,954 INFO L276 IsEmpty]: Start isEmpty. Operand has 2071 states, 1032 states have (on average 2.123062015503876) internal successors, (2191), 2065 states have internal predecessors, (2191), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-11-25 18:03:35,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-25 18:03:35,960 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:35,961 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-25 18:03:35,961 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 18:03:35,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:35,966 INFO L85 PathProgramCache]: Analyzing trace with hash 38794, now seen corresponding path program 1 times [2021-11-25 18:03:35,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:03:35,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [498841348] [2021-11-25 18:03:35,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:35,978 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:03:35,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:03:35,982 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:03:35,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 18:03:36,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:36,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:03:36,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:36,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:03:36,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:03:36,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:03:36,211 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:03:36,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [498841348] [2021-11-25 18:03:36,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [498841348] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:03:36,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:03:36,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:03:36,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377292644] [2021-11-25 18:03:36,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:03:36,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:03:36,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:03:36,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:03:36,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:03:36,250 INFO L87 Difference]: Start difference. First operand has 2071 states, 1032 states have (on average 2.123062015503876) internal successors, (2191), 2065 states have internal predecessors, (2191), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:39,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:39,248 INFO L93 Difference]: Finished difference Result 2235 states and 3301 transitions. [2021-11-25 18:03:39,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:03:39,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-11-25 18:03:39,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:39,285 INFO L225 Difference]: With dead ends: 2235 [2021-11-25 18:03:39,285 INFO L226 Difference]: Without dead ends: 2233 [2021-11-25 18:03:39,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:03:39,290 INFO L933 BasicCegarLoop]: 2636 mSDtfsCounter, 1985 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2488 SdHoareTripleChecker+Valid, 2785 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:39,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2488 Valid, 2785 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1135 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-25 18:03:39,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2233 states. [2021-11-25 18:03:39,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2233 to 2055. [2021-11-25 18:03:39,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 1032 states have (on average 2.0416666666666665) internal successors, (2107), 2049 states have internal predecessors, (2107), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-11-25 18:03:39,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 3113 transitions. [2021-11-25 18:03:39,809 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 3113 transitions. Word has length 3 [2021-11-25 18:03:39,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:39,809 INFO L470 AbstractCegarLoop]: Abstraction has 2055 states and 3113 transitions. [2021-11-25 18:03:39,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:39,810 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 3113 transitions. [2021-11-25 18:03:39,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-25 18:03:39,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:39,811 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-25 18:03:39,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:03:40,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:03:40,023 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 18:03:40,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:40,025 INFO L85 PathProgramCache]: Analyzing trace with hash 38795, now seen corresponding path program 1 times [2021-11-25 18:03:40,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:03:40,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [174714576] [2021-11-25 18:03:40,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:40,027 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:03:40,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:03:40,038 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:03:40,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 18:03:40,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:40,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:03:40,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:40,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:03:40,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:03:40,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:03:40,233 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:03:40,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [174714576] [2021-11-25 18:03:40,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [174714576] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:03:40,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:03:40,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:03:40,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681629587] [2021-11-25 18:03:40,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:03:40,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:03:40,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:03:40,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:03:40,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:03:40,245 INFO L87 Difference]: Start difference. First operand 2055 states and 3113 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:44,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:44,577 INFO L93 Difference]: Finished difference Result 3463 states and 5553 transitions. [2021-11-25 18:03:44,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:03:44,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-11-25 18:03:44,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:44,604 INFO L225 Difference]: With dead ends: 3463 [2021-11-25 18:03:44,604 INFO L226 Difference]: Without dead ends: 3463 [2021-11-25 18:03:44,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:03:44,607 INFO L933 BasicCegarLoop]: 3417 mSDtfsCounter, 1440 mSDsluCounter, 2083 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1940 SdHoareTripleChecker+Valid, 5500 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:44,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1940 Valid, 5500 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-11-25 18:03:44,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3463 states. [2021-11-25 18:03:45,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3463 to 3177. [2021-11-25 18:03:45,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3177 states, 1655 states have (on average 2.015105740181269) internal successors, (3335), 3171 states have internal predecessors, (3335), 1003 states have call successors, (1003), 2 states have call predecessors, (1003), 2 states have return successors, (1003), 5 states have call predecessors, (1003), 1003 states have call successors, (1003) [2021-11-25 18:03:45,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3177 states to 3177 states and 5341 transitions. [2021-11-25 18:03:45,047 INFO L78 Accepts]: Start accepts. Automaton has 3177 states and 5341 transitions. Word has length 3 [2021-11-25 18:03:45,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:45,048 INFO L470 AbstractCegarLoop]: Abstraction has 3177 states and 5341 transitions. [2021-11-25 18:03:45,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:45,049 INFO L276 IsEmpty]: Start isEmpty. Operand 3177 states and 5341 transitions. [2021-11-25 18:03:45,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 18:03:45,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:45,049 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:45,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:03:45,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:03:45,261 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 18:03:45,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:45,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1466973012, now seen corresponding path program 1 times [2021-11-25 18:03:45,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:03:45,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [554083713] [2021-11-25 18:03:45,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:45,263 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:03:45,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:03:45,264 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:03:45,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 18:03:45,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:45,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:03:45,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:45,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:03:45,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:03:45,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:03:45,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:03:45,516 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:03:45,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-25 18:03:45,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:03:45,544 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:03:45,544 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:03:45,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [554083713] [2021-11-25 18:03:45,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [554083713] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:03:45,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:03:45,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:03:45,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920560257] [2021-11-25 18:03:45,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:03:45,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:03:45,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:03:45,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:03:45,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:03:45,547 INFO L87 Difference]: Start difference. First operand 3177 states and 5341 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:51,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:51,378 INFO L93 Difference]: Finished difference Result 3344 states and 5516 transitions. [2021-11-25 18:03:51,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:03:51,379 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-11-25 18:03:51,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:51,404 INFO L225 Difference]: With dead ends: 3344 [2021-11-25 18:03:51,404 INFO L226 Difference]: Without dead ends: 3344 [2021-11-25 18:03:51,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:03:51,406 INFO L933 BasicCegarLoop]: 2363 mSDtfsCounter, 4223 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 1460 mSolverCounterSat, 526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4726 SdHoareTripleChecker+Valid, 2444 SdHoareTripleChecker+Invalid, 1986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 526 IncrementalHoareTripleChecker+Valid, 1460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:51,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4726 Valid, 2444 Invalid, 1986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [526 Valid, 1460 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-11-25 18:03:51,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3344 states. [2021-11-25 18:03:51,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3344 to 2044. [2021-11-25 18:03:51,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2044 states, 1032 states have (on average 2.0300387596899223) internal successors, (2095), 2038 states have internal predecessors, (2095), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-11-25 18:03:51,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 3101 transitions. [2021-11-25 18:03:51,873 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 3101 transitions. Word has length 7 [2021-11-25 18:03:51,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:51,874 INFO L470 AbstractCegarLoop]: Abstraction has 2044 states and 3101 transitions. [2021-11-25 18:03:51,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:51,874 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 3101 transitions. [2021-11-25 18:03:51,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 18:03:51,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:51,876 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:51,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-25 18:03:52,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:03:52,089 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 18:03:52,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:52,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1768476910, now seen corresponding path program 1 times [2021-11-25 18:03:52,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:03:52,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [896352309] [2021-11-25 18:03:52,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:52,091 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:03:52,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:03:52,093 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:03:52,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-25 18:03:52,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:52,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:03:52,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:52,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:03:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:03:52,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:03:52,242 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:03:52,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [896352309] [2021-11-25 18:03:52,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [896352309] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:03:52,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:03:52,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:03:52,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529721660] [2021-11-25 18:03:52,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:03:52,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:03:52,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:03:52,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:03:52,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:03:52,245 INFO L87 Difference]: Start difference. First operand 2044 states and 3101 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:54,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:54,912 INFO L93 Difference]: Finished difference Result 3210 states and 5288 transitions. [2021-11-25 18:03:54,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:03:54,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-11-25 18:03:54,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:54,939 INFO L225 Difference]: With dead ends: 3210 [2021-11-25 18:03:54,940 INFO L226 Difference]: Without dead ends: 3210 [2021-11-25 18:03:54,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:03:54,944 INFO L933 BasicCegarLoop]: 4866 mSDtfsCounter, 1804 mSDsluCounter, 2257 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2307 SdHoareTripleChecker+Valid, 7123 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:54,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2307 Valid, 7123 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1129 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-25 18:03:54,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3210 states. [2021-11-25 18:03:55,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3210 to 1997. [2021-11-25 18:03:55,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1997 states, 1032 states have (on average 1.9844961240310077) internal successors, (2048), 1991 states have internal predecessors, (2048), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-11-25 18:03:55,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1997 states to 1997 states and 3054 transitions. [2021-11-25 18:03:55,369 INFO L78 Accepts]: Start accepts. Automaton has 1997 states and 3054 transitions. Word has length 8 [2021-11-25 18:03:55,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:55,370 INFO L470 AbstractCegarLoop]: Abstraction has 1997 states and 3054 transitions. [2021-11-25 18:03:55,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:55,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1997 states and 3054 transitions. [2021-11-25 18:03:55,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 18:03:55,371 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:55,371 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:55,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-25 18:03:55,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:03:55,594 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 18:03:55,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:55,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1768476909, now seen corresponding path program 1 times [2021-11-25 18:03:55,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:03:55,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [993496347] [2021-11-25 18:03:55,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:55,595 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:03:55,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:03:55,596 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:03:55,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-25 18:03:55,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:55,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:03:55,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:55,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:03:55,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:03:55,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:03:55,764 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:03:55,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [993496347] [2021-11-25 18:03:55,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [993496347] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:03:55,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:03:55,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:03:55,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76871739] [2021-11-25 18:03:55,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:03:55,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:03:55,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:03:55,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:03:55,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:03:55,766 INFO L87 Difference]: Start difference. First operand 1997 states and 3054 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:59,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:59,027 INFO L93 Difference]: Finished difference Result 3275 states and 5356 transitions. [2021-11-25 18:03:59,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:03:59,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-11-25 18:03:59,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:59,061 INFO L225 Difference]: With dead ends: 3275 [2021-11-25 18:03:59,061 INFO L226 Difference]: Without dead ends: 3275 [2021-11-25 18:03:59,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:03:59,064 INFO L933 BasicCegarLoop]: 5058 mSDtfsCounter, 1489 mSDsluCounter, 2423 mSDsCounter, 0 mSdLazyCounter, 1146 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1989 SdHoareTripleChecker+Valid, 7481 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:59,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1989 Valid, 7481 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1146 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-25 18:03:59,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3275 states. [2021-11-25 18:03:59,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3275 to 2019. [2021-11-25 18:03:59,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2019 states, 1064 states have (on average 1.9774436090225564) internal successors, (2104), 2013 states have internal predecessors, (2104), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-11-25 18:03:59,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2019 states to 2019 states and 3110 transitions. [2021-11-25 18:03:59,395 INFO L78 Accepts]: Start accepts. Automaton has 2019 states and 3110 transitions. Word has length 8 [2021-11-25 18:03:59,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:59,395 INFO L470 AbstractCegarLoop]: Abstraction has 2019 states and 3110 transitions. [2021-11-25 18:03:59,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:59,396 INFO L276 IsEmpty]: Start isEmpty. Operand 2019 states and 3110 transitions. [2021-11-25 18:03:59,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 18:03:59,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:59,397 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:59,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:03:59,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:03:59,608 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr429REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 18:03:59,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:59,611 INFO L85 PathProgramCache]: Analyzing trace with hash 874110197, now seen corresponding path program 1 times [2021-11-25 18:03:59,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:03:59,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1746884504] [2021-11-25 18:03:59,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:03:59,612 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:03:59,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:03:59,613 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:03:59,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-25 18:03:59,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:03:59,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:03:59,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:03:59,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:03:59,822 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:03:59,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1746884504] [2021-11-25 18:03:59,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1746884504] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:03:59,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:03:59,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:03:59,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130802487] [2021-11-25 18:03:59,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:03:59,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:03:59,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:03:59,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:03:59,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:03:59,825 INFO L87 Difference]: Start difference. First operand 2019 states and 3110 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:04:00,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:00,186 INFO L93 Difference]: Finished difference Result 3486 states and 5612 transitions. [2021-11-25 18:04:00,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:04:00,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-11-25 18:04:00,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:00,212 INFO L225 Difference]: With dead ends: 3486 [2021-11-25 18:04:00,212 INFO L226 Difference]: Without dead ends: 3486 [2021-11-25 18:04:00,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:04:00,213 INFO L933 BasicCegarLoop]: 3606 mSDtfsCounter, 1560 mSDsluCounter, 2887 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2062 SdHoareTripleChecker+Valid, 6493 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:04:00,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2062 Valid, 6493 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:04:00,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3486 states. [2021-11-25 18:04:00,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3486 to 3193. [2021-11-25 18:04:00,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3193 states, 1738 states have (on average 1.9568469505178365) internal successors, (3401), 3187 states have internal predecessors, (3401), 1003 states have call successors, (1003), 2 states have call predecessors, (1003), 2 states have return successors, (1003), 5 states have call predecessors, (1003), 1003 states have call successors, (1003) [2021-11-25 18:04:00,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3193 states to 3193 states and 5407 transitions. [2021-11-25 18:04:00,687 INFO L78 Accepts]: Start accepts. Automaton has 3193 states and 5407 transitions. Word has length 11 [2021-11-25 18:04:00,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:00,688 INFO L470 AbstractCegarLoop]: Abstraction has 3193 states and 5407 transitions. [2021-11-25 18:04:00,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:04:00,689 INFO L276 IsEmpty]: Start isEmpty. Operand 3193 states and 5407 transitions. [2021-11-25 18:04:00,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 18:04:00,690 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:00,690 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:04:00,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:04:00,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:04:00,902 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr340REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 18:04:00,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:00,905 INFO L85 PathProgramCache]: Analyzing trace with hash -702153283, now seen corresponding path program 1 times [2021-11-25 18:04:00,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:04:00,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [654971201] [2021-11-25 18:04:00,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:00,906 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:04:00,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:04:00,907 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:04:00,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-25 18:04:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:01,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:04:01,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:04:01,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:04:01,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:04:01,084 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:04:01,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [654971201] [2021-11-25 18:04:01,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [654971201] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:04:01,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:04:01,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:04:01,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168122416] [2021-11-25 18:04:01,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:04:01,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:04:01,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:04:01,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:04:01,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:04:01,087 INFO L87 Difference]: Start difference. First operand 3193 states and 5407 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:04:01,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:01,141 INFO L93 Difference]: Finished difference Result 3347 states and 5547 transitions. [2021-11-25 18:04:01,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:04:01,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-11-25 18:04:01,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:01,170 INFO L225 Difference]: With dead ends: 3347 [2021-11-25 18:04:01,170 INFO L226 Difference]: Without dead ends: 3347 [2021-11-25 18:04:01,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:04:01,172 INFO L933 BasicCegarLoop]: 3202 mSDtfsCounter, 1394 mSDsluCounter, 1317 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1894 SdHoareTripleChecker+Valid, 4519 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:04:01,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1894 Valid, 4519 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:04:01,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3347 states. [2021-11-25 18:04:01,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3347 to 3133. [2021-11-25 18:04:01,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3133 states, 1702 states have (on average 1.9477085781433607) internal successors, (3315), 3127 states have internal predecessors, (3315), 1003 states have call successors, (1003), 2 states have call predecessors, (1003), 2 states have return successors, (1003), 5 states have call predecessors, (1003), 1003 states have call successors, (1003) [2021-11-25 18:04:01,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3133 states to 3133 states and 5321 transitions. [2021-11-25 18:04:01,563 INFO L78 Accepts]: Start accepts. Automaton has 3133 states and 5321 transitions. Word has length 13 [2021-11-25 18:04:01,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:01,563 INFO L470 AbstractCegarLoop]: Abstraction has 3133 states and 5321 transitions. [2021-11-25 18:04:01,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:04:01,564 INFO L276 IsEmpty]: Start isEmpty. Operand 3133 states and 5321 transitions. [2021-11-25 18:04:01,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 18:04:01,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:01,565 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:04:01,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-25 18:04:01,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:04:01,778 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr534ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 18:04:01,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:01,780 INFO L85 PathProgramCache]: Analyzing trace with hash 240246254, now seen corresponding path program 1 times [2021-11-25 18:04:01,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:04:01,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1209545576] [2021-11-25 18:04:01,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:01,781 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:04:01,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:04:01,782 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:04:01,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-25 18:04:01,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:01,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:04:01,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:04:01,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:04:01,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:04:02,014 INFO L354 Elim1Store]: treesize reduction 165, result has 13.6 percent of original size [2021-11-25 18:04:02,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 36 [2021-11-25 18:04:02,068 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-25 18:04:02,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 20 [2021-11-25 18:04:02,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:04:02,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:04:02,112 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:04:02,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1209545576] [2021-11-25 18:04:02,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1209545576] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:04:02,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:04:02,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:04:02,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422786279] [2021-11-25 18:04:02,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:04:02,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:04:02,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:04:02,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:04:02,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:04:02,114 INFO L87 Difference]: Start difference. First operand 3133 states and 5321 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:04:05,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:05,264 INFO L93 Difference]: Finished difference Result 5450 states and 9669 transitions. [2021-11-25 18:04:05,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:04:05,265 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-11-25 18:04:05,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:05,291 INFO L225 Difference]: With dead ends: 5450 [2021-11-25 18:04:05,291 INFO L226 Difference]: Without dead ends: 5450 [2021-11-25 18:04:05,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:04:05,292 INFO L933 BasicCegarLoop]: 3461 mSDtfsCounter, 1330 mSDsluCounter, 5812 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1830 SdHoareTripleChecker+Valid, 9273 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:04:05,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1830 Valid, 9273 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 674 Invalid, 0 Unknown, 37 Unchecked, 3.0s Time] [2021-11-25 18:04:05,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5450 states. [2021-11-25 18:04:05,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5450 to 3132. [2021-11-25 18:04:05,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3132 states, 1701 states have (on average 1.9476778365667256) internal successors, (3313), 3126 states have internal predecessors, (3313), 1003 states have call successors, (1003), 2 states have call predecessors, (1003), 2 states have return successors, (1003), 5 states have call predecessors, (1003), 1003 states have call successors, (1003) [2021-11-25 18:04:05,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3132 states to 3132 states and 5319 transitions. [2021-11-25 18:04:05,887 INFO L78 Accepts]: Start accepts. Automaton has 3132 states and 5319 transitions. Word has length 14 [2021-11-25 18:04:05,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:05,887 INFO L470 AbstractCegarLoop]: Abstraction has 3132 states and 5319 transitions. [2021-11-25 18:04:05,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:04:05,887 INFO L276 IsEmpty]: Start isEmpty. Operand 3132 states and 5319 transitions. [2021-11-25 18:04:05,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 18:04:05,888 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:05,888 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:04:05,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-25 18:04:06,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:04:06,103 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 18:04:06,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:06,104 INFO L85 PathProgramCache]: Analyzing trace with hash -344619170, now seen corresponding path program 1 times [2021-11-25 18:04:06,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:04:06,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1977432642] [2021-11-25 18:04:06,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:06,105 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:04:06,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:04:06,105 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:04:06,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-25 18:04:06,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:06,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 18:04:06,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:04:06,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:04:06,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:04:06,299 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:04:06,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1977432642] [2021-11-25 18:04:06,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1977432642] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:04:06,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:04:06,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:04:06,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571152426] [2021-11-25 18:04:06,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:04:06,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:04:06,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:04:06,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:04:06,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:04:06,305 INFO L87 Difference]: Start difference. First operand 3132 states and 5319 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:04:06,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:06,349 INFO L93 Difference]: Finished difference Result 3072 states and 5233 transitions. [2021-11-25 18:04:06,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:04:06,350 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2021-11-25 18:04:06,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:06,367 INFO L225 Difference]: With dead ends: 3072 [2021-11-25 18:04:06,367 INFO L226 Difference]: Without dead ends: 3072 [2021-11-25 18:04:06,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:04:06,371 INFO L933 BasicCegarLoop]: 2954 mSDtfsCounter, 1933 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2436 SdHoareTripleChecker+Valid, 3481 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:04:06,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2436 Valid, 3481 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:04:06,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2021-11-25 18:04:06,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 3072. [2021-11-25 18:04:06,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3072 states, 1665 states have (on average 1.9381381381381382) internal successors, (3227), 3066 states have internal predecessors, (3227), 1003 states have call successors, (1003), 2 states have call predecessors, (1003), 2 states have return successors, (1003), 5 states have call predecessors, (1003), 1003 states have call successors, (1003) [2021-11-25 18:04:06,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3072 states to 3072 states and 5233 transitions. [2021-11-25 18:04:06,713 INFO L78 Accepts]: Start accepts. Automaton has 3072 states and 5233 transitions. Word has length 18 [2021-11-25 18:04:06,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:06,714 INFO L470 AbstractCegarLoop]: Abstraction has 3072 states and 5233 transitions. [2021-11-25 18:04:06,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:04:06,714 INFO L276 IsEmpty]: Start isEmpty. Operand 3072 states and 5233 transitions. [2021-11-25 18:04:06,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 18:04:06,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:06,715 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:04:06,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-25 18:04:06,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:04:06,927 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 18:04:06,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:06,927 INFO L85 PathProgramCache]: Analyzing trace with hash -466544200, now seen corresponding path program 1 times [2021-11-25 18:04:06,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:04:06,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320486841] [2021-11-25 18:04:06,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:06,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:04:06,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:04:06,929 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:04:06,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-25 18:04:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:07,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:04:07,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:04:07,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:04:07,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:04:07,154 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:04:07,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320486841] [2021-11-25 18:04:07,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [320486841] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:04:07,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:04:07,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:04:07,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931933902] [2021-11-25 18:04:07,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:04:07,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:04:07,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:04:07,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:04:07,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:04:07,155 INFO L87 Difference]: Start difference. First operand 3072 states and 5233 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:04:07,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:07,262 INFO L93 Difference]: Finished difference Result 3044 states and 5177 transitions. [2021-11-25 18:04:07,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:04:07,263 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-11-25 18:04:07,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:07,273 INFO L225 Difference]: With dead ends: 3044 [2021-11-25 18:04:07,274 INFO L226 Difference]: Without dead ends: 3044 [2021-11-25 18:04:07,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:04:07,275 INFO L933 BasicCegarLoop]: 2909 mSDtfsCounter, 1904 mSDsluCounter, 3429 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2407 SdHoareTripleChecker+Valid, 6338 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:04:07,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2407 Valid, 6338 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:04:07,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3044 states. [2021-11-25 18:04:07,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3044 to 3042. [2021-11-25 18:04:07,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3042 states, 1649 states have (on average 1.9217707701637357) internal successors, (3169), 3036 states have internal predecessors, (3169), 1003 states have call successors, (1003), 2 states have call predecessors, (1003), 2 states have return successors, (1003), 5 states have call predecessors, (1003), 1003 states have call successors, (1003) [2021-11-25 18:04:07,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3042 states to 3042 states and 5175 transitions. [2021-11-25 18:04:07,613 INFO L78 Accepts]: Start accepts. Automaton has 3042 states and 5175 transitions. Word has length 20 [2021-11-25 18:04:07,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:07,613 INFO L470 AbstractCegarLoop]: Abstraction has 3042 states and 5175 transitions. [2021-11-25 18:04:07,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:04:07,613 INFO L276 IsEmpty]: Start isEmpty. Operand 3042 states and 5175 transitions. [2021-11-25 18:04:07,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 18:04:07,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:07,615 INFO L514 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] [2021-11-25 18:04:07,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-25 18:04:07,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:04:07,846 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 18:04:07,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:07,847 INFO L85 PathProgramCache]: Analyzing trace with hash 2117531686, now seen corresponding path program 1 times [2021-11-25 18:04:07,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:04:07,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1528064283] [2021-11-25 18:04:07,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:07,848 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:04:07,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:04:07,849 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:04:07,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-25 18:04:07,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:07,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:04:08,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:04:08,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:04:08,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:04:08,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:04:08,114 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:04:08,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1528064283] [2021-11-25 18:04:08,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1528064283] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:04:08,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:04:08,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:04:08,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183220610] [2021-11-25 18:04:08,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:04:08,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:04:08,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:04:08,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:04:08,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:04:08,116 INFO L87 Difference]: Start difference. First operand 3042 states and 5175 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:04:12,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:12,544 INFO L93 Difference]: Finished difference Result 5473 states and 9671 transitions. [2021-11-25 18:04:12,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:04:12,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-11-25 18:04:12,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:12,566 INFO L225 Difference]: With dead ends: 5473 [2021-11-25 18:04:12,566 INFO L226 Difference]: Without dead ends: 5473 [2021-11-25 18:04:12,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:04:12,567 INFO L933 BasicCegarLoop]: 2988 mSDtfsCounter, 3442 mSDsluCounter, 3514 mSDsCounter, 0 mSdLazyCounter, 1871 mSolverCounterSat, 1019 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3442 SdHoareTripleChecker+Valid, 6502 SdHoareTripleChecker+Invalid, 2890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1019 IncrementalHoareTripleChecker+Valid, 1871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:04:12,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3442 Valid, 6502 Invalid, 2890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1019 Valid, 1871 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-11-25 18:04:12,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5473 states. [2021-11-25 18:04:13,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5473 to 3038. [2021-11-25 18:04:13,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 1649 states have (on average 1.9169193450576107) internal successors, (3161), 3032 states have internal predecessors, (3161), 1003 states have call successors, (1003), 2 states have call predecessors, (1003), 2 states have return successors, (1003), 5 states have call predecessors, (1003), 1003 states have call successors, (1003) [2021-11-25 18:04:13,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 5167 transitions. [2021-11-25 18:04:13,204 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 5167 transitions. Word has length 34 [2021-11-25 18:04:13,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:13,205 INFO L470 AbstractCegarLoop]: Abstraction has 3038 states and 5167 transitions. [2021-11-25 18:04:13,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:04:13,205 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 5167 transitions. [2021-11-25 18:04:13,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 18:04:13,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:13,206 INFO L514 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] [2021-11-25 18:04:13,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-25 18:04:13,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:04:13,418 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 18:04:13,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:13,420 INFO L85 PathProgramCache]: Analyzing trace with hash 2117531687, now seen corresponding path program 1 times [2021-11-25 18:04:13,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:04:13,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1438885078] [2021-11-25 18:04:13,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:13,421 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:04:13,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:04:13,422 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:04:13,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-25 18:04:13,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:13,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:04:13,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:04:13,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:04:13,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:04:13,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:04:13,932 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:04:13,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1438885078] [2021-11-25 18:04:13,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1438885078] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:04:13,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:04:13,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:04:13,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631985620] [2021-11-25 18:04:13,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:04:13,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:04:13,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:04:13,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:04:13,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:04:13,934 INFO L87 Difference]: Start difference. First operand 3038 states and 5167 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:04:19,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:19,360 INFO L93 Difference]: Finished difference Result 5530 states and 9693 transitions. [2021-11-25 18:04:19,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:04:19,361 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-11-25 18:04:19,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:19,381 INFO L225 Difference]: With dead ends: 5530 [2021-11-25 18:04:19,381 INFO L226 Difference]: Without dead ends: 5530 [2021-11-25 18:04:19,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:04:19,382 INFO L933 BasicCegarLoop]: 5152 mSDtfsCounter, 2908 mSDsluCounter, 4930 mSDsCounter, 0 mSdLazyCounter, 2170 mSolverCounterSat, 1004 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2908 SdHoareTripleChecker+Valid, 10082 SdHoareTripleChecker+Invalid, 3174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1004 IncrementalHoareTripleChecker+Valid, 2170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:04:19,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2908 Valid, 10082 Invalid, 3174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1004 Valid, 2170 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-11-25 18:04:19,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5530 states. [2021-11-25 18:04:20,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5530 to 3034. [2021-11-25 18:04:20,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3034 states, 1649 states have (on average 1.9120679199514858) internal successors, (3153), 3028 states have internal predecessors, (3153), 1003 states have call successors, (1003), 2 states have call predecessors, (1003), 2 states have return successors, (1003), 5 states have call predecessors, (1003), 1003 states have call successors, (1003) [2021-11-25 18:04:20,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 5159 transitions. [2021-11-25 18:04:20,133 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 5159 transitions. Word has length 34 [2021-11-25 18:04:20,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:20,134 INFO L470 AbstractCegarLoop]: Abstraction has 3034 states and 5159 transitions. [2021-11-25 18:04:20,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:04:20,134 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 5159 transitions. [2021-11-25 18:04:20,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-25 18:04:20,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:20,136 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:04:20,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-25 18:04:20,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:04:20,348 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 18:04:20,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:20,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1509555205, now seen corresponding path program 1 times [2021-11-25 18:04:20,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:04:20,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43557548] [2021-11-25 18:04:20,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:20,351 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:04:20,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:04:20,352 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:04:20,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-25 18:04:20,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:20,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:04:20,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:04:20,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:04:20,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:04:20,737 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:04:20,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43557548] [2021-11-25 18:04:20,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43557548] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:04:20,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:04:20,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:04:20,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118769755] [2021-11-25 18:04:20,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:04:20,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:04:20,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:04:20,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:04:20,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:04:20,739 INFO L87 Difference]: Start difference. First operand 3034 states and 5159 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:04:20,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:20,822 INFO L93 Difference]: Finished difference Result 3022 states and 5139 transitions. [2021-11-25 18:04:20,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:04:20,822 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-25 18:04:20,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:20,831 INFO L225 Difference]: With dead ends: 3022 [2021-11-25 18:04:20,832 INFO L226 Difference]: Without dead ends: 3022 [2021-11-25 18:04:20,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:04:20,834 INFO L933 BasicCegarLoop]: 2903 mSDtfsCounter, 1880 mSDsluCounter, 3413 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2383 SdHoareTripleChecker+Valid, 6316 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:04:20,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2383 Valid, 6316 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:04:20,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3022 states. [2021-11-25 18:04:21,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3022 to 3022. [2021-11-25 18:04:21,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3022 states, 1637 states have (on average 1.9138668295662797) internal successors, (3133), 3016 states have internal predecessors, (3133), 1003 states have call successors, (1003), 2 states have call predecessors, (1003), 2 states have return successors, (1003), 5 states have call predecessors, (1003), 1003 states have call successors, (1003) [2021-11-25 18:04:21,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 5139 transitions. [2021-11-25 18:04:21,215 INFO L78 Accepts]: Start accepts. Automaton has 3022 states and 5139 transitions. Word has length 52 [2021-11-25 18:04:21,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:21,216 INFO L470 AbstractCegarLoop]: Abstraction has 3022 states and 5139 transitions. [2021-11-25 18:04:21,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:04:21,216 INFO L276 IsEmpty]: Start isEmpty. Operand 3022 states and 5139 transitions. [2021-11-25 18:04:21,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-25 18:04:21,217 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:21,218 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:04:21,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-25 18:04:21,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:04:21,430 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 18:04:21,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:21,455 INFO L85 PathProgramCache]: Analyzing trace with hash -881686959, now seen corresponding path program 1 times [2021-11-25 18:04:21,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:04:21,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1732080762] [2021-11-25 18:04:21,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:21,457 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:04:21,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:04:21,458 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:04:21,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-25 18:04:21,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:21,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:04:21,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:04:21,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:04:21,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:04:22,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:04:22,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 18:04:22,558 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 18:04:22,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-11-25 18:04:22,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:04:22,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:04:22,576 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:04:22,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1732080762] [2021-11-25 18:04:22,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1732080762] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:04:22,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:04:22,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:04:22,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344907496] [2021-11-25 18:04:22,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:04:22,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:04:22,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:04:22,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:04:22,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:04:22,579 INFO L87 Difference]: Start difference. First operand 3022 states and 5139 transitions. Second operand has 4 states, 3 states have (on average 20.0) 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) [2021-11-25 18:04:27,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:27,929 INFO L93 Difference]: Finished difference Result 5224 states and 9400 transitions. [2021-11-25 18:04:27,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:04:27,929 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 20.0) 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 60 [2021-11-25 18:04:27,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:27,949 INFO L225 Difference]: With dead ends: 5224 [2021-11-25 18:04:27,949 INFO L226 Difference]: Without dead ends: 5224 [2021-11-25 18:04:27,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:04:27,950 INFO L933 BasicCegarLoop]: 2951 mSDtfsCounter, 4397 mSDsluCounter, 1212 mSDsCounter, 0 mSdLazyCounter, 1635 mSolverCounterSat, 551 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5400 SdHoareTripleChecker+Valid, 4163 SdHoareTripleChecker+Invalid, 2186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 551 IncrementalHoareTripleChecker+Valid, 1635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:04:27,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5400 Valid, 4163 Invalid, 2186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [551 Valid, 1635 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-11-25 18:04:27,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5224 states. [2021-11-25 18:04:28,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5224 to 2952. [2021-11-25 18:04:28,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2952 states, 1605 states have (on average 1.8872274143302181) internal successors, (3029), 2946 states have internal predecessors, (3029), 1003 states have call successors, (1003), 2 states have call predecessors, (1003), 2 states have return successors, (1003), 5 states have call predecessors, (1003), 1003 states have call successors, (1003) [2021-11-25 18:04:28,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 5035 transitions. [2021-11-25 18:04:28,624 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 5035 transitions. Word has length 60 [2021-11-25 18:04:28,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:28,624 INFO L470 AbstractCegarLoop]: Abstraction has 2952 states and 5035 transitions. [2021-11-25 18:04:28,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 20.0) 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) [2021-11-25 18:04:28,624 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 5035 transitions. [2021-11-25 18:04:28,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-25 18:04:28,625 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:28,626 INFO L514 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] [2021-11-25 18:04:28,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-25 18:04:28,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:04:28,858 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr76REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 18:04:28,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:28,861 INFO L85 PathProgramCache]: Analyzing trace with hash -855470841, now seen corresponding path program 1 times [2021-11-25 18:04:28,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:04:28,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [558233086] [2021-11-25 18:04:28,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:28,862 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:04:28,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:04:28,863 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:04:28,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-25 18:04:29,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:29,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:04:29,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:04:29,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:04:29,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:04:29,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 18:04:29,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:04:29,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:04:29,344 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:04:29,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [558233086] [2021-11-25 18:04:29,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [558233086] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:04:29,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:04:29,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:04:29,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547118819] [2021-11-25 18:04:29,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:04:29,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:04:29,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:04:29,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:04:29,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:04:29,348 INFO L87 Difference]: Start difference. First operand 2952 states and 5035 transitions. Second operand has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:04:31,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:31,469 INFO L93 Difference]: Finished difference Result 2951 states and 5034 transitions. [2021-11-25 18:04:31,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:04:31,470 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-25 18:04:31,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:31,483 INFO L225 Difference]: With dead ends: 2951 [2021-11-25 18:04:31,483 INFO L226 Difference]: Without dead ends: 2951 [2021-11-25 18:04:31,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:04:31,486 INFO L933 BasicCegarLoop]: 2863 mSDtfsCounter, 4 mSDsluCounter, 7351 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10214 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:04:31,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 10214 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1243 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-25 18:04:31,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-11-25 18:04:31,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2951. [2021-11-25 18:04:31,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2951 states, 1605 states have (on average 1.8866043613707164) internal successors, (3028), 2945 states have internal predecessors, (3028), 1003 states have call successors, (1003), 2 states have call predecessors, (1003), 2 states have return successors, (1003), 5 states have call predecessors, (1003), 1003 states have call successors, (1003) [2021-11-25 18:04:31,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2951 states to 2951 states and 5034 transitions. [2021-11-25 18:04:31,854 INFO L78 Accepts]: Start accepts. Automaton has 2951 states and 5034 transitions. Word has length 65 [2021-11-25 18:04:31,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:31,855 INFO L470 AbstractCegarLoop]: Abstraction has 2951 states and 5034 transitions. [2021-11-25 18:04:31,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:04:31,855 INFO L276 IsEmpty]: Start isEmpty. Operand 2951 states and 5034 transitions. [2021-11-25 18:04:31,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-25 18:04:31,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:31,858 INFO L514 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] [2021-11-25 18:04:31,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-25 18:04:32,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:04:32,072 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr77REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 18:04:32,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:32,072 INFO L85 PathProgramCache]: Analyzing trace with hash -855470840, now seen corresponding path program 1 times [2021-11-25 18:04:32,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:04:32,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1293399852] [2021-11-25 18:04:32,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:32,073 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:04:32,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:04:32,074 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:04:32,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-25 18:04:32,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:32,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 18:04:32,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:04:32,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 18:04:32,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:04:32,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 18:04:32,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-11-25 18:04:32,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-25 18:04:32,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:04:32,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:04:32,611 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:04:32,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1293399852] [2021-11-25 18:04:32,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1293399852] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:04:32,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:04:32,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:04:32,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040473045] [2021-11-25 18:04:32,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:04:32,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:04:32,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:04:32,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:04:32,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:04:32,613 INFO L87 Difference]: Start difference. First operand 2951 states and 5034 transitions. Second operand has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:04:35,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:35,428 INFO L93 Difference]: Finished difference Result 2950 states and 5033 transitions. [2021-11-25 18:04:35,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:04:35,429 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-25 18:04:35,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:35,444 INFO L225 Difference]: With dead ends: 2950 [2021-11-25 18:04:35,444 INFO L226 Difference]: Without dead ends: 2950 [2021-11-25 18:04:35,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:04:35,445 INFO L933 BasicCegarLoop]: 2863 mSDtfsCounter, 2 mSDsluCounter, 7387 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 10250 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:04:35,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 10250 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-25 18:04:35,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2950 states. [2021-11-25 18:04:35,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2950 to 2950. [2021-11-25 18:04:35,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2950 states, 1604 states have (on average 1.8871571072319202) internal successors, (3027), 2944 states have internal predecessors, (3027), 1003 states have call successors, (1003), 2 states have call predecessors, (1003), 2 states have return successors, (1003), 5 states have call predecessors, (1003), 1003 states have call successors, (1003) [2021-11-25 18:04:35,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2950 states to 2950 states and 5033 transitions. [2021-11-25 18:04:35,817 INFO L78 Accepts]: Start accepts. Automaton has 2950 states and 5033 transitions. Word has length 65 [2021-11-25 18:04:35,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:35,818 INFO L470 AbstractCegarLoop]: Abstraction has 2950 states and 5033 transitions. [2021-11-25 18:04:35,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.25) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:04:35,818 INFO L276 IsEmpty]: Start isEmpty. Operand 2950 states and 5033 transitions. [2021-11-25 18:04:35,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-25 18:04:35,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:35,819 INFO L514 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] [2021-11-25 18:04:35,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-25 18:04:36,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:04:36,032 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 18:04:36,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:36,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1522422575, now seen corresponding path program 1 times [2021-11-25 18:04:36,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:04:36,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [835978839] [2021-11-25 18:04:36,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:36,034 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:04:36,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:04:36,034 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:04:36,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-25 18:04:36,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:36,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 18:04:36,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:04:36,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:04:36,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 18:04:36,485 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:04:36,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [835978839] [2021-11-25 18:04:36,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [835978839] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:04:36,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:04:36,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:04:36,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475091219] [2021-11-25 18:04:36,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:04:36,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:04:36,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:04:36,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:04:36,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:04:36,488 INFO L87 Difference]: Start difference. First operand 2950 states and 5033 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:04:36,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:36,571 INFO L93 Difference]: Finished difference Result 2953 states and 5037 transitions. [2021-11-25 18:04:36,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:04:36,572 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2021-11-25 18:04:36,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:36,598 INFO L225 Difference]: With dead ends: 2953 [2021-11-25 18:04:36,607 INFO L226 Difference]: Without dead ends: 2953 [2021-11-25 18:04:36,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:04:36,608 INFO L933 BasicCegarLoop]: 2863 mSDtfsCounter, 2 mSDsluCounter, 5721 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8584 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:04:36,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 8584 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:04:36,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2953 states. [2021-11-25 18:04:36,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2953 to 2953. [2021-11-25 18:04:36,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2953 states, 1606 states have (on average 1.8866749688667497) internal successors, (3030), 2947 states have internal predecessors, (3030), 1003 states have call successors, (1003), 2 states have call predecessors, (1003), 3 states have return successors, (1004), 5 states have call predecessors, (1004), 1003 states have call successors, (1004) [2021-11-25 18:04:36,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2953 states to 2953 states and 5037 transitions. [2021-11-25 18:04:36,890 INFO L78 Accepts]: Start accepts. Automaton has 2953 states and 5037 transitions. Word has length 73 [2021-11-25 18:04:36,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:36,890 INFO L470 AbstractCegarLoop]: Abstraction has 2953 states and 5037 transitions. [2021-11-25 18:04:36,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:04:36,891 INFO L276 IsEmpty]: Start isEmpty. Operand 2953 states and 5037 transitions. [2021-11-25 18:04:36,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-25 18:04:36,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:36,892 INFO L514 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] [2021-11-25 18:04:36,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-25 18:04:37,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:04:37,105 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 18:04:37,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:37,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1741939320, now seen corresponding path program 1 times [2021-11-25 18:04:37,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:04:37,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [102584370] [2021-11-25 18:04:37,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:37,107 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:04:37,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:04:37,109 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:04:37,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-25 18:04:37,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:37,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:04:37,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:04:37,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:04:37,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:04:37,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:04:37,768 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:04:37,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [102584370] [2021-11-25 18:04:37,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [102584370] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:04:37,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2050034947] [2021-11-25 18:04:37,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:37,769 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:04:37,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:04:37,773 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:04:37,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-25 18:04:38,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:38,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:04:38,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:04:38,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:04:38,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:04:38,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:04:38,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2050034947] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:04:38,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844456805] [2021-11-25 18:04:38,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:04:38,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:04:38,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:04:38,475 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:04:38,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-25 18:04:38,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:04:38,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:04:38,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:04:38,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:04:38,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:04:38,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:04:38,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844456805] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:04:38,966 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 18:04:38,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-25 18:04:38,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615381208] [2021-11-25 18:04:38,966 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 18:04:38,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 18:04:38,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:04:38,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 18:04:38,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:04:38,968 INFO L87 Difference]: Start difference. First operand 2953 states and 5037 transitions. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:04:39,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:39,151 INFO L93 Difference]: Finished difference Result 2965 states and 5054 transitions. [2021-11-25 18:04:39,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 18:04:39,152 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 74 [2021-11-25 18:04:39,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:39,165 INFO L225 Difference]: With dead ends: 2965 [2021-11-25 18:04:39,165 INFO L226 Difference]: Without dead ends: 2965 [2021-11-25 18:04:39,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-11-25 18:04:39,166 INFO L933 BasicCegarLoop]: 2864 mSDtfsCounter, 22 mSDsluCounter, 5724 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 8588 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:04:39,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 8588 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:04:39,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2021-11-25 18:04:39,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2963. [2021-11-25 18:04:39,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2963 states, 1615 states have (on average 1.8854489164086687) internal successors, (3045), 2956 states have internal predecessors, (3045), 1003 states have call successors, (1003), 3 states have call predecessors, (1003), 4 states have return successors, (1004), 5 states have call predecessors, (1004), 1003 states have call successors, (1004) [2021-11-25 18:04:39,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2963 states to 2963 states and 5052 transitions. [2021-11-25 18:04:39,564 INFO L78 Accepts]: Start accepts. Automaton has 2963 states and 5052 transitions. Word has length 74 [2021-11-25 18:04:39,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:39,565 INFO L470 AbstractCegarLoop]: Abstraction has 2963 states and 5052 transitions. [2021-11-25 18:04:39,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 18:04:39,565 INFO L276 IsEmpty]: Start isEmpty. Operand 2963 states and 5052 transitions. [2021-11-25 18:04:39,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 18:04:39,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:39,566 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:04:39,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-25 18:04:39,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-25 18:04:39,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-25 18:04:40,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 18:04:40,181 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 18:04:40,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:40,181 INFO L85 PathProgramCache]: Analyzing trace with hash 755671407, now seen corresponding path program 2 times [2021-11-25 18:04:40,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:04:40,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [989667057] [2021-11-25 18:04:40,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 18:04:40,196 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:04:40,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:04:40,197 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:04:40,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-25 18:04:40,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 18:04:40,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:04:40,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:04:40,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:04:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:04:40,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:04:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:04:41,045 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:04:41,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [989667057] [2021-11-25 18:04:41,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [989667057] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:04:41,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [662871964] [2021-11-25 18:04:41,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 18:04:41,046 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:04:41,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:04:41,046 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:04:41,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-25 18:04:42,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 18:04:42,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:04:42,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:04:42,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:04:42,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:04:42,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:04:42,861 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:04:42,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [662871964] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:04:42,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308500302] [2021-11-25 18:04:42,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 18:04:42,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:04:42,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:04:42,863 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:04:42,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-25 18:05:09,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 18:05:09,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:05:09,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:05:09,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:09,680 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:09,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:09,975 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:09,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308500302] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:05:09,975 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 18:05:09,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2021-11-25 18:05:09,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868751112] [2021-11-25 18:05:09,976 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 18:05:09,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 18:05:09,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:05:09,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 18:05:09,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2021-11-25 18:05:09,978 INFO L87 Difference]: Start difference. First operand 2963 states and 5052 transitions. Second operand has 20 states, 20 states have (on average 4.5) internal successors, (90), 20 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:05:10,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:05:10,806 INFO L93 Difference]: Finished difference Result 2984 states and 5079 transitions. [2021-11-25 18:05:10,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-25 18:05:10,806 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 20 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 77 [2021-11-25 18:05:10,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:10,816 INFO L225 Difference]: With dead ends: 2984 [2021-11-25 18:05:10,816 INFO L226 Difference]: Without dead ends: 2978 [2021-11-25 18:05:10,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=416, Invalid=774, Unknown=0, NotChecked=0, Total=1190 [2021-11-25 18:05:10,818 INFO L933 BasicCegarLoop]: 2866 mSDtfsCounter, 91 mSDsluCounter, 17172 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 20038 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:05:10,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 20038 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:05:10,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2978 states. [2021-11-25 18:05:11,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2978 to 2972. [2021-11-25 18:05:11,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2972 states, 1624 states have (on average 1.8817733990147782) internal successors, (3056), 2965 states have internal predecessors, (3056), 1003 states have call successors, (1003), 3 states have call predecessors, (1003), 4 states have return successors, (1004), 5 states have call predecessors, (1004), 1003 states have call successors, (1004) [2021-11-25 18:05:11,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2972 states to 2972 states and 5063 transitions. [2021-11-25 18:05:11,106 INFO L78 Accepts]: Start accepts. Automaton has 2972 states and 5063 transitions. Word has length 77 [2021-11-25 18:05:11,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:11,107 INFO L470 AbstractCegarLoop]: Abstraction has 2972 states and 5063 transitions. [2021-11-25 18:05:11,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 20 states have internal predecessors, (90), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:05:11,107 INFO L276 IsEmpty]: Start isEmpty. Operand 2972 states and 5063 transitions. [2021-11-25 18:05:11,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-25 18:05:11,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:11,108 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:05:11,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-25 18:05:11,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-25 18:05:11,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-25 18:05:11,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 18:05:11,723 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 532 more)] === [2021-11-25 18:05:11,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:11,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1043203377, now seen corresponding path program 3 times [2021-11-25 18:05:11,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:05:11,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273410406] [2021-11-25 18:05:11,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:05:11,725 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:05:11,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:05:11,726 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:05:11,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-25 18:05:12,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-25 18:05:12,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:05:12,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 18:05:12,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:12,723 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:12,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:13,449 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:13,450 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:05:13,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273410406] [2021-11-25 18:05:13,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1273410406] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:05:13,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [615867268] [2021-11-25 18:05:13,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:05:13,450 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:05:13,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:05:13,451 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:05:13,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-25 18:05:18,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-25 18:05:18,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:05:18,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 18:05:18,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:18,161 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:18,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:18,436 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:05:18,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [615867268] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:05:18,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061881794] [2021-11-25 18:05:18,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:05:18,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:05:18,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:05:18,454 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:05:18,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd048276-5914-4f73-bcd9-a9413feb4eeb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process