./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test1-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test1-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH --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 7f552e336cb6eb3ea16ba25a84411e1d0c8dcfaa2b088c21df87ffefed1a84a7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:46:04,942 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:46:04,944 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:46:04,984 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:46:04,985 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:46:04,986 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:46:04,988 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:46:04,991 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:46:04,994 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:46:04,995 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:46:04,997 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:46:04,998 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:46:04,999 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:46:05,001 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:46:05,003 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:46:05,005 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:46:05,007 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:46:05,008 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:46:05,011 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:46:05,014 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:46:05,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:46:05,020 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:46:05,021 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:46:05,023 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:46:05,034 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:46:05,034 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:46:05,035 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:46:05,036 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:46:05,041 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:46:05,043 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:46:05,043 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:46:05,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:46:05,046 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:46:05,049 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:46:05,050 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:46:05,054 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:46:05,056 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:46:05,056 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:46:05,057 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:46:05,058 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:46:05,060 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:46:05,061 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-03 03:46:05,100 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:46:05,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:46:05,101 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:46:05,102 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:46:05,102 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:46:05,102 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:46:05,102 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 03:46:05,103 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:46:05,103 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:46:05,103 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 03:46:05,103 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 03:46:05,103 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:46:05,104 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 03:46:05,104 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 03:46:05,104 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 03:46:05,113 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 03:46:05,114 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 03:46:05,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:46:05,115 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:46:05,115 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 03:46:05,115 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 03:46:05,115 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:46:05,116 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:46:05,116 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 03:46:05,117 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 03:46:05,117 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 03:46:05,119 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:46:05,120 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:46:05,121 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:46:05,121 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:46:05,121 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:46:05,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:46:05,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:46:05,122 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:46:05,123 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:46:05,123 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 03:46:05,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 03:46:05,125 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:46:05,125 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:46:05,125 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_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f552e336cb6eb3ea16ba25a84411e1d0c8dcfaa2b088c21df87ffefed1a84a7 [2021-11-03 03:46:05,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:46:05,538 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:46:05,541 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:46:05,543 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:46:05,544 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:46:05,545 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test1-2.i [2021-11-03 03:46:05,646 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/data/d4bad7968/1cc2361b82474cf78b94d23fc1fbc2ff/FLAGf6475112e [2021-11-03 03:46:06,425 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:46:06,438 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test1-2.i [2021-11-03 03:46:06,478 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/data/d4bad7968/1cc2361b82474cf78b94d23fc1fbc2ff/FLAGf6475112e [2021-11-03 03:46:06,607 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/data/d4bad7968/1cc2361b82474cf78b94d23fc1fbc2ff [2021-11-03 03:46:06,611 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:46:06,613 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:46:06,615 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:46:06,615 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:46:06,619 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:46:06,620 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:46:06" (1/1) ... [2021-11-03 03:46:06,622 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9244d52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:06, skipping insertion in model container [2021-11-03 03:46:06,622 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:46:06" (1/1) ... [2021-11-03 03:46:06,631 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:46:06,696 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:46:07,260 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test1-2.i[33021,33034] [2021-11-03 03:46:07,414 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:46:07,427 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) [2021-11-03 03:46:07,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4d0a8c7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:07, skipping insertion in model container [2021-11-03 03:46:07,441 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:46:07,442 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 03:46:07,444 INFO L168 Benchmark]: Toolchain (without parser) took 830.53 ms. Allocated memory is still 121.6 MB. Free memory was 86.6 MB in the beginning and 89.1 MB in the end (delta: -2.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-03 03:46:07,445 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 83.9 MB. Free memory is still 40.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 03:46:07,446 INFO L168 Benchmark]: CACSL2BoogieTranslator took 827.01 ms. Allocated memory is still 121.6 MB. Free memory was 86.3 MB in the beginning and 89.1 MB in the end (delta: -2.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-03 03:46:07,448 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 83.9 MB. Free memory is still 40.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 827.01 ms. Allocated memory is still 121.6 MB. Free memory was 86.3 MB in the beginning and 89.1 MB in the end (delta: -2.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 751]: 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_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test1-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH --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 7f552e336cb6eb3ea16ba25a84411e1d0c8dcfaa2b088c21df87ffefed1a84a7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:46:10,204 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:46:10,207 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:46:10,250 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:46:10,251 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:46:10,252 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:46:10,255 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:46:10,258 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:46:10,261 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:46:10,262 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:46:10,264 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:46:10,266 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:46:10,267 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:46:10,268 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:46:10,271 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:46:10,273 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:46:10,274 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:46:10,276 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:46:10,279 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:46:10,296 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:46:10,299 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:46:10,301 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:46:10,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:46:10,305 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:46:10,310 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:46:10,310 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:46:10,311 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:46:10,313 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:46:10,313 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:46:10,315 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:46:10,316 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:46:10,317 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:46:10,318 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:46:10,319 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:46:10,321 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:46:10,322 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:46:10,323 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:46:10,323 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:46:10,324 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:46:10,326 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:46:10,327 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:46:10,328 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-03 03:46:10,373 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:46:10,373 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:46:10,374 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:46:10,374 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:46:10,374 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:46:10,375 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:46:10,375 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:46:10,375 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:46:10,375 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:46:10,376 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 03:46:10,376 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 03:46:10,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:46:10,377 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:46:10,377 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 03:46:10,377 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 03:46:10,378 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:46:10,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:46:10,381 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 03:46:10,382 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 03:46:10,382 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 03:46:10,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:46:10,383 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:46:10,383 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 03:46:10,384 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 03:46:10,384 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:46:10,384 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:46:10,385 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:46:10,385 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 03:46:10,386 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:46:10,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:46:10,386 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:46:10,387 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:46:10,387 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 03:46:10,387 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 03:46:10,388 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:46:10,388 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:46:10,389 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_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f552e336cb6eb3ea16ba25a84411e1d0c8dcfaa2b088c21df87ffefed1a84a7 [2021-11-03 03:46:10,853 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:46:10,900 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:46:10,905 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:46:10,906 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:46:10,907 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:46:10,908 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test1-2.i [2021-11-03 03:46:11,001 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/data/9847e2360/6ff462a99aa849a0a4b2ebea86bc6f47/FLAGa224ce45c [2021-11-03 03:46:11,817 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:46:11,818 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test1-2.i [2021-11-03 03:46:11,840 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/data/9847e2360/6ff462a99aa849a0a4b2ebea86bc6f47/FLAGa224ce45c [2021-11-03 03:46:12,031 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/data/9847e2360/6ff462a99aa849a0a4b2ebea86bc6f47 [2021-11-03 03:46:12,034 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:46:12,035 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:46:12,048 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:46:12,048 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:46:12,052 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:46:12,053 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:46:12" (1/1) ... [2021-11-03 03:46:12,054 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bc14bee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:12, skipping insertion in model container [2021-11-03 03:46:12,055 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:46:12" (1/1) ... [2021-11-03 03:46:12,063 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:46:12,165 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:46:12,734 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test1-2.i[33021,33034] [2021-11-03 03:46:12,945 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:46:12,972 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 03:46:12,997 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:46:13,026 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test1-2.i[33021,33034] [2021-11-03 03:46:13,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:46:13,175 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 03:46:13,222 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test1-2.i[33021,33034] [2021-11-03 03:46:13,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:46:13,344 INFO L208 MainTranslator]: Completed translation [2021-11-03 03:46:13,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:13 WrapperNode [2021-11-03 03:46:13,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:46:13,347 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 03:46:13,347 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 03:46:13,347 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 03:46:13,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:13" (1/1) ... [2021-11-03 03:46:13,424 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:13" (1/1) ... [2021-11-03 03:46:13,543 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 03:46:13,544 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 03:46:13,544 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 03:46:13,544 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 03:46:13,553 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:13" (1/1) ... [2021-11-03 03:46:13,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:13" (1/1) ... [2021-11-03 03:46:13,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:13" (1/1) ... [2021-11-03 03:46:13,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:13" (1/1) ... [2021-11-03 03:46:13,639 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:13" (1/1) ... [2021-11-03 03:46:13,663 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:13" (1/1) ... [2021-11-03 03:46:13,669 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:13" (1/1) ... [2021-11-03 03:46:13,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 03:46:13,695 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 03:46:13,695 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 03:46:13,696 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 03:46:13,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:13" (1/1) ... [2021-11-03 03:46:13,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:46:13,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:46:13,732 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 03:46:13,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 03:46:13,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 03:46:13,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 03:46:13,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 03:46:13,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 03:46:13,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 03:46:13,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 03:46:13,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 03:46:13,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 03:46:13,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 03:46:13,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 03:46:13,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 03:46:18,748 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 03:46:18,748 INFO L299 CfgBuilder]: Removed 72 assume(true) statements. [2021-11-03 03:46:18,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:46:18 BoogieIcfgContainer [2021-11-03 03:46:18,754 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 03:46:18,758 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 03:46:18,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 03:46:18,762 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 03:46:18,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:46:12" (1/3) ... [2021-11-03 03:46:18,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a6de37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:46:18, skipping insertion in model container [2021-11-03 03:46:18,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:46:13" (2/3) ... [2021-11-03 03:46:18,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28a6de37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:46:18, skipping insertion in model container [2021-11-03 03:46:18,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:46:18" (3/3) ... [2021-11-03 03:46:18,770 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test1-2.i [2021-11-03 03:46:18,776 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 03:46:18,777 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 444 error locations. [2021-11-03 03:46:18,829 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 03:46:18,836 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 [2021-11-03 03:46:18,837 INFO L340 AbstractCegarLoop]: Starting to check reachability of 444 error locations. [2021-11-03 03:46:18,881 INFO L276 IsEmpty]: Start isEmpty. Operand has 885 states, 440 states have (on average 2.2454545454545456) internal successors, (988), 884 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:18,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 03:46:18,889 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:46:18,890 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 03:46:18,890 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 440 more)] === [2021-11-03 03:46:18,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:46:18,897 INFO L85 PathProgramCache]: Analyzing trace with hash 28698764, now seen corresponding path program 1 times [2021-11-03 03:46:18,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:46:18,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [785644084] [2021-11-03 03:46:18,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:46:18,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:46:18,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:46:18,917 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:46:18,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 03:46:19,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:46:19,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 03:46:19,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:46:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:19,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:46:19,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:19,191 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:46:19,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [785644084] [2021-11-03 03:46:19,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [785644084] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:46:19,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:46:19,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 03:46:19,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157733824] [2021-11-03 03:46:19,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 03:46:19,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:46:19,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 03:46:19,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 03:46:19,258 INFO L87 Difference]: Start difference. First operand has 885 states, 440 states have (on average 2.2454545454545456) internal successors, (988), 884 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:19,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:46:19,368 INFO L93 Difference]: Finished difference Result 876 states and 925 transitions. [2021-11-03 03:46:19,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 03:46:19,369 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-11-03 03:46:19,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:46:19,401 INFO L225 Difference]: With dead ends: 876 [2021-11-03 03:46:19,402 INFO L226 Difference]: Without dead ends: 874 [2021-11-03 03:46:19,404 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 03:46:19,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-11-03 03:46:19,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 874. [2021-11-03 03:46:19,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 435 states have (on average 2.12183908045977) internal successors, (923), 873 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:19,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 923 transitions. [2021-11-03 03:46:19,550 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 923 transitions. Word has length 5 [2021-11-03 03:46:19,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:46:19,551 INFO L470 AbstractCegarLoop]: Abstraction has 874 states and 923 transitions. [2021-11-03 03:46:19,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:19,552 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 923 transitions. [2021-11-03 03:46:19,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 03:46:19,552 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:46:19,553 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 03:46:19,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-03 03:46:19,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:46:19,765 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 440 more)] === [2021-11-03 03:46:19,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:46:19,767 INFO L85 PathProgramCache]: Analyzing trace with hash 28698826, now seen corresponding path program 1 times [2021-11-03 03:46:19,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:46:19,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725114798] [2021-11-03 03:46:19,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:46:19,769 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:46:19,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:46:19,782 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:46:19,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 03:46:19,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:46:19,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 03:46:19,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:46:19,966 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 [2021-11-03 03:46:19,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:19,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:46:20,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:20,008 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:46:20,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725114798] [2021-11-03 03:46:20,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [725114798] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:46:20,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:46:20,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 03:46:20,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678687053] [2021-11-03 03:46:20,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:46:20,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:46:20,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:46:20,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:46:20,013 INFO L87 Difference]: Start difference. First operand 874 states and 923 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:22,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:46:22,068 INFO L93 Difference]: Finished difference Result 832 states and 882 transitions. [2021-11-03 03:46:22,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:46:22,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-11-03 03:46:22,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:46:22,079 INFO L225 Difference]: With dead ends: 832 [2021-11-03 03:46:22,080 INFO L226 Difference]: Without dead ends: 832 [2021-11-03 03:46:22,081 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:46:22,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-11-03 03:46:22,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 825. [2021-11-03 03:46:22,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 435 states have (on average 2.0091954022988507) internal successors, (874), 824 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:22,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 874 transitions. [2021-11-03 03:46:22,135 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 874 transitions. Word has length 5 [2021-11-03 03:46:22,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:46:22,136 INFO L470 AbstractCegarLoop]: Abstraction has 825 states and 874 transitions. [2021-11-03 03:46:22,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:22,136 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 874 transitions. [2021-11-03 03:46:22,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 03:46:22,137 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:46:22,137 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 03:46:22,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 03:46:22,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:46:22,350 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 440 more)] === [2021-11-03 03:46:22,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:46:22,352 INFO L85 PathProgramCache]: Analyzing trace with hash 28698827, now seen corresponding path program 1 times [2021-11-03 03:46:22,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:46:22,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [394549008] [2021-11-03 03:46:22,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:46:22,353 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:46:22,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:46:22,358 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:46:22,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 03:46:22,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:46:22,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:46:22,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:46:22,546 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 [2021-11-03 03:46:22,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:22,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:46:22,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:22,662 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:46:22,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [394549008] [2021-11-03 03:46:22,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [394549008] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:46:22,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:46:22,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 03:46:22,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14554378] [2021-11-03 03:46:22,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:46:22,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:46:22,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:46:22,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:46:22,666 INFO L87 Difference]: Start difference. First operand 825 states and 874 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2021-11-03 03:46:27,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:46:27,211 INFO L93 Difference]: Finished difference Result 898 states and 951 transitions. [2021-11-03 03:46:27,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:46:27,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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 5 [2021-11-03 03:46:27,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:46:27,218 INFO L225 Difference]: With dead ends: 898 [2021-11-03 03:46:27,219 INFO L226 Difference]: Without dead ends: 898 [2021-11-03 03:46:27,219 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:46:27,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-11-03 03:46:27,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 847. [2021-11-03 03:46:27,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 467 states have (on average 1.9914346895074946) internal successors, (930), 846 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:27,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 930 transitions. [2021-11-03 03:46:27,245 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 930 transitions. Word has length 5 [2021-11-03 03:46:27,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:46:27,246 INFO L470 AbstractCegarLoop]: Abstraction has 847 states and 930 transitions. [2021-11-03 03:46:27,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2021-11-03 03:46:27,247 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 930 transitions. [2021-11-03 03:46:27,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 03:46:27,247 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:46:27,248 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 03:46:27,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-03 03:46:27,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:46:27,461 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr322REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 440 more)] === [2021-11-03 03:46:27,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:46:27,462 INFO L85 PathProgramCache]: Analyzing trace with hash 890510813, now seen corresponding path program 1 times [2021-11-03 03:46:27,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:46:27,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [382774591] [2021-11-03 03:46:27,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:46:27,463 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:46:27,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:46:27,465 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:46:27,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 03:46:27,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:46:27,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 03:46:27,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:46:27,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:27,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:46:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:27,631 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:46:27,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [382774591] [2021-11-03 03:46:27,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [382774591] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:46:27,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:46:27,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 03:46:27,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561659485] [2021-11-03 03:46:27,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:46:27,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:46:27,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:46:27,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:46:27,635 INFO L87 Difference]: Start difference. First operand 847 states and 930 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-11-03 03:46:27,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:46:27,746 INFO L93 Difference]: Finished difference Result 1438 states and 1582 transitions. [2021-11-03 03:46:27,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:46:27,747 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 6 [2021-11-03 03:46:27,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:46:27,756 INFO L225 Difference]: With dead ends: 1438 [2021-11-03 03:46:27,757 INFO L226 Difference]: Without dead ends: 1438 [2021-11-03 03:46:27,757 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:46:27,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2021-11-03 03:46:27,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 1178. [2021-11-03 03:46:27,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 798 states have (on average 1.9824561403508771) internal successors, (1582), 1177 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:27,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1582 transitions. [2021-11-03 03:46:27,799 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1582 transitions. Word has length 6 [2021-11-03 03:46:27,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:46:27,799 INFO L470 AbstractCegarLoop]: Abstraction has 1178 states and 1582 transitions. [2021-11-03 03:46:27,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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) [2021-11-03 03:46:27,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1582 transitions. [2021-11-03 03:46:27,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-03 03:46:27,801 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:46:27,801 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:46:27,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 03:46:28,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:46:28,015 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 440 more)] === [2021-11-03 03:46:28,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:46:28,016 INFO L85 PathProgramCache]: Analyzing trace with hash 2013913556, now seen corresponding path program 1 times [2021-11-03 03:46:28,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:46:28,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2067873120] [2021-11-03 03:46:28,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:46:28,017 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:46:28,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:46:28,022 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:46:28,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 03:46:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:46:28,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 03:46:28,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:46:28,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:28,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:46:28,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:28,292 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:46:28,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2067873120] [2021-11-03 03:46:28,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2067873120] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:46:28,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:46:28,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 03:46:28,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449546] [2021-11-03 03:46:28,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:46:28,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:46:28,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:46:28,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:46:28,303 INFO L87 Difference]: Start difference. First operand 1178 states and 1582 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2021-11-03 03:46:28,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:46:28,347 INFO L93 Difference]: Finished difference Result 1118 states and 1496 transitions. [2021-11-03 03:46:28,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:46:28,348 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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 11 [2021-11-03 03:46:28,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:46:28,356 INFO L225 Difference]: With dead ends: 1118 [2021-11-03 03:46:28,356 INFO L226 Difference]: Without dead ends: 1118 [2021-11-03 03:46:28,357 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:46:28,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2021-11-03 03:46:28,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1118. [2021-11-03 03:46:28,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 762 states have (on average 1.963254593175853) internal successors, (1496), 1117 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:28,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1496 transitions. [2021-11-03 03:46:28,396 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1496 transitions. Word has length 11 [2021-11-03 03:46:28,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:46:28,397 INFO L470 AbstractCegarLoop]: Abstraction has 1118 states and 1496 transitions. [2021-11-03 03:46:28,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2021-11-03 03:46:28,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1496 transitions. [2021-11-03 03:46:28,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 03:46:28,398 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:46:28,398 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:46:28,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-03 03:46:28,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:46:28,614 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 440 more)] === [2021-11-03 03:46:28,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:46:28,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1659327634, now seen corresponding path program 1 times [2021-11-03 03:46:28,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:46:28,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1973052553] [2021-11-03 03:46:28,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:46:28,616 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:46:28,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:46:28,617 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:46:28,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 03:46:28,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:46:28,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:46:28,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:46:28,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:28,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:46:28,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:28,911 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:46:28,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1973052553] [2021-11-03 03:46:28,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1973052553] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:46:28,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:46:28,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 03:46:28,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516837792] [2021-11-03 03:46:28,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:46:28,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:46:28,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:46:28,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:46:28,915 INFO L87 Difference]: Start difference. First operand 1118 states and 1496 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:29,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:46:29,024 INFO L93 Difference]: Finished difference Result 1090 states and 1440 transitions. [2021-11-03 03:46:29,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:46:29,025 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2021-11-03 03:46:29,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:46:29,033 INFO L225 Difference]: With dead ends: 1090 [2021-11-03 03:46:29,033 INFO L226 Difference]: Without dead ends: 1090 [2021-11-03 03:46:29,034 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:46:29,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-11-03 03:46:29,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 1088. [2021-11-03 03:46:29,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 746 states have (on average 1.9276139410187667) internal successors, (1438), 1087 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:29,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 1438 transitions. [2021-11-03 03:46:29,068 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 1438 transitions. Word has length 13 [2021-11-03 03:46:29,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:46:29,069 INFO L470 AbstractCegarLoop]: Abstraction has 1088 states and 1438 transitions. [2021-11-03 03:46:29,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:29,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 1438 transitions. [2021-11-03 03:46:29,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 03:46:29,070 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:46:29,070 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:46:29,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 03:46:29,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:46:29,275 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 440 more)] === [2021-11-03 03:46:29,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:46:29,275 INFO L85 PathProgramCache]: Analyzing trace with hash 913198236, now seen corresponding path program 1 times [2021-11-03 03:46:29,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:46:29,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843688583] [2021-11-03 03:46:29,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:46:29,276 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:46:29,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:46:29,278 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:46:29,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 03:46:29,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:46:29,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:46:29,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:46:29,495 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 [2021-11-03 03:46:29,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:29,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:46:29,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:29,777 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:46:29,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843688583] [2021-11-03 03:46:29,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843688583] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:46:29,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:46:29,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 03:46:29,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94109835] [2021-11-03 03:46:29,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:46:29,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:46:29,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:46:29,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:46:29,779 INFO L87 Difference]: Start difference. First operand 1088 states and 1438 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:32,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:46:32,273 INFO L93 Difference]: Finished difference Result 1341 states and 1708 transitions. [2021-11-03 03:46:32,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:46:32,275 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2021-11-03 03:46:32,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:46:32,284 INFO L225 Difference]: With dead ends: 1341 [2021-11-03 03:46:32,285 INFO L226 Difference]: Without dead ends: 1341 [2021-11-03 03:46:32,285 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:46:32,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-11-03 03:46:32,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1084. [2021-11-03 03:46:32,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 746 states have (on average 1.9168900804289544) internal successors, (1430), 1083 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:32,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 1430 transitions. [2021-11-03 03:46:32,342 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 1430 transitions. Word has length 27 [2021-11-03 03:46:32,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:46:32,342 INFO L470 AbstractCegarLoop]: Abstraction has 1084 states and 1430 transitions. [2021-11-03 03:46:32,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:32,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 1430 transitions. [2021-11-03 03:46:32,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 03:46:32,346 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:46:32,347 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:46:32,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 03:46:32,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:46:32,561 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr43REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 440 more)] === [2021-11-03 03:46:32,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:46:32,562 INFO L85 PathProgramCache]: Analyzing trace with hash 913198237, now seen corresponding path program 1 times [2021-11-03 03:46:32,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:46:32,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1842754946] [2021-11-03 03:46:32,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:46:32,563 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:46:32,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:46:32,569 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:46:32,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 03:46:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:46:32,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:46:32,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:46:32,802 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 [2021-11-03 03:46:33,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:33,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:46:33,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:33,691 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:46:33,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1842754946] [2021-11-03 03:46:33,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1842754946] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:46:33,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:46:33,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 03:46:33,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697264909] [2021-11-03 03:46:33,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:46:33,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:46:33,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:46:33,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:46:33,693 INFO L87 Difference]: Start difference. First operand 1084 states and 1430 transitions. Second operand has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 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) [2021-11-03 03:46:39,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:46:39,950 INFO L93 Difference]: Finished difference Result 1404 states and 1743 transitions. [2021-11-03 03:46:39,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 03:46:39,951 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 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 27 [2021-11-03 03:46:39,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:46:39,958 INFO L225 Difference]: With dead ends: 1404 [2021-11-03 03:46:39,959 INFO L226 Difference]: Without dead ends: 1404 [2021-11-03 03:46:39,959 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-03 03:46:39,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-11-03 03:46:39,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1080. [2021-11-03 03:46:39,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 746 states have (on average 1.906166219839142) internal successors, (1422), 1079 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:39,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1422 transitions. [2021-11-03 03:46:39,999 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1422 transitions. Word has length 27 [2021-11-03 03:46:39,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:46:40,002 INFO L470 AbstractCegarLoop]: Abstraction has 1080 states and 1422 transitions. [2021-11-03 03:46:40,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 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) [2021-11-03 03:46:40,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1422 transitions. [2021-11-03 03:46:40,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-03 03:46:40,004 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:46:40,005 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:46:40,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 03:46:40,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:46:40,219 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr107REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 440 more)] === [2021-11-03 03:46:40,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:46:40,220 INFO L85 PathProgramCache]: Analyzing trace with hash 944973104, now seen corresponding path program 1 times [2021-11-03 03:46:40,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:46:40,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917214554] [2021-11-03 03:46:40,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:46:40,221 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:46:40,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:46:40,224 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:46:40,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 03:46:40,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:46:40,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:46:40,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:46:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:40,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:46:40,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:40,871 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:46:40,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917214554] [2021-11-03 03:46:40,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917214554] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:46:40,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:46:40,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 03:46:40,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148268213] [2021-11-03 03:46:40,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:46:40,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:46:40,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:46:40,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:46:40,875 INFO L87 Difference]: Start difference. First operand 1080 states and 1422 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:40,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:46:40,947 INFO L93 Difference]: Finished difference Result 1068 states and 1402 transitions. [2021-11-03 03:46:40,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:46:40,948 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-11-03 03:46:40,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:46:40,955 INFO L225 Difference]: With dead ends: 1068 [2021-11-03 03:46:40,955 INFO L226 Difference]: Without dead ends: 1068 [2021-11-03 03:46:40,956 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:46:40,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-11-03 03:46:40,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 1068. [2021-11-03 03:46:40,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 734 states have (on average 1.9100817438692097) internal successors, (1402), 1067 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:40,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1402 transitions. [2021-11-03 03:46:40,990 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1402 transitions. Word has length 42 [2021-11-03 03:46:40,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:46:40,992 INFO L470 AbstractCegarLoop]: Abstraction has 1068 states and 1402 transitions. [2021-11-03 03:46:40,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:40,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1402 transitions. [2021-11-03 03:46:40,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-03 03:46:40,998 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:46:40,999 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:46:41,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 03:46:41,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:46:41,219 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr107REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 440 more)] === [2021-11-03 03:46:41,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:46:41,219 INFO L85 PathProgramCache]: Analyzing trace with hash 29098340, now seen corresponding path program 1 times [2021-11-03 03:46:41,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:46:41,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1874361643] [2021-11-03 03:46:41,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:46:41,221 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:46:41,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:46:41,222 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:46:41,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 03:46:41,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:46:41,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:46:41,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:46:42,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:42,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:46:42,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:42,498 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:46:42,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1874361643] [2021-11-03 03:46:42,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1874361643] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:46:42,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:46:42,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 03:46:42,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792084650] [2021-11-03 03:46:42,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:46:42,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:46:42,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:46:42,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:46:42,501 INFO L87 Difference]: Start difference. First operand 1068 states and 1402 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:42,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:46:42,789 INFO L93 Difference]: Finished difference Result 1213 states and 1501 transitions. [2021-11-03 03:46:42,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:46:42,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-03 03:46:42,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:46:42,796 INFO L225 Difference]: With dead ends: 1213 [2021-11-03 03:46:42,796 INFO L226 Difference]: Without dead ends: 1213 [2021-11-03 03:46:42,797 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:46:42,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-11-03 03:46:42,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1018. [2021-11-03 03:46:42,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 684 states have (on average 1.8961988304093567) internal successors, (1297), 1017 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:42,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1297 transitions. [2021-11-03 03:46:42,826 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1297 transitions. Word has length 50 [2021-11-03 03:46:42,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:46:42,826 INFO L470 AbstractCegarLoop]: Abstraction has 1018 states and 1297 transitions. [2021-11-03 03:46:42,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:46:42,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1297 transitions. [2021-11-03 03:46:42,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-03 03:46:42,828 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:46:42,828 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:46:42,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 03:46:43,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:46:43,043 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 440 more)] === [2021-11-03 03:46:43,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:46:43,043 INFO L85 PathProgramCache]: Analyzing trace with hash -839399161, now seen corresponding path program 1 times [2021-11-03 03:46:43,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:46:43,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1072009552] [2021-11-03 03:46:43,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:46:43,045 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:46:43,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:46:43,046 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:46:43,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 03:46:43,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:46:43,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 03:46:43,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:46:43,591 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 [2021-11-03 03:46:43,600 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 [2021-11-03 03:46:44,494 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-03 03:46:44,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-11-03 03:46:44,505 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-03 03:46:44,506 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 25 treesize of output 21 [2021-11-03 03:46:44,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:44,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:46:50,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:46:50,385 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:46:50,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1072009552] [2021-11-03 03:46:50,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1072009552] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:46:50,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:46:50,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 03:46:50,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475739017] [2021-11-03 03:46:50,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:46:50,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:46:50,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:46:50,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-03 03:46:50,389 INFO L87 Difference]: Start difference. First operand 1018 states and 1297 transitions. Second operand has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:47:01,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:47:01,842 INFO L93 Difference]: Finished difference Result 993 states and 1235 transitions. [2021-11-03 03:47:01,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 03:47:01,843 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-03 03:47:01,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:47:01,848 INFO L225 Difference]: With dead ends: 993 [2021-11-03 03:47:01,848 INFO L226 Difference]: Without dead ends: 993 [2021-11-03 03:47:01,849 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=26, Invalid=28, Unknown=2, NotChecked=0, Total=56 [2021-11-03 03:47:01,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2021-11-03 03:47:01,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 948. [2021-11-03 03:47:01,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 652 states have (on average 1.771472392638037) internal successors, (1155), 947 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:47:01,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1155 transitions. [2021-11-03 03:47:01,873 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1155 transitions. Word has length 53 [2021-11-03 03:47:01,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:47:01,874 INFO L470 AbstractCegarLoop]: Abstraction has 948 states and 1155 transitions. [2021-11-03 03:47:01,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:47:01,874 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1155 transitions. [2021-11-03 03:47:01,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 03:47:01,875 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:47:01,876 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:47:01,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 03:47:02,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:47:02,091 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 440 more)] === [2021-11-03 03:47:02,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:47:02,091 INFO L85 PathProgramCache]: Analyzing trace with hash -416260760, now seen corresponding path program 1 times [2021-11-03 03:47:02,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:47:02,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [831296996] [2021-11-03 03:47:02,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:47:02,092 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:47:02,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:47:02,093 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:47:02,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 03:47:02,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:47:02,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:47:02,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:47:02,680 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 [2021-11-03 03:47:02,701 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 21 treesize of output 17 [2021-11-03 03:47:02,753 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 23 treesize of output 11 [2021-11-03 03:47:02,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:47:02,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:47:02,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:47:02,955 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:47:02,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [831296996] [2021-11-03 03:47:02,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [831296996] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:47:02,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:47:02,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 03:47:02,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338794517] [2021-11-03 03:47:02,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:47:02,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:47:02,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:47:02,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:47:02,958 INFO L87 Difference]: Start difference. First operand 948 states and 1155 transitions. Second operand has 6 states, 5 states have (on average 11.8) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:47:07,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:47:07,950 INFO L93 Difference]: Finished difference Result 1400 states and 1637 transitions. [2021-11-03 03:47:07,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 03:47:07,951 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.8) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-03 03:47:07,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:47:07,958 INFO L225 Difference]: With dead ends: 1400 [2021-11-03 03:47:07,958 INFO L226 Difference]: Without dead ends: 1400 [2021-11-03 03:47:07,958 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-03 03:47:07,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-11-03 03:47:07,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 947. [2021-11-03 03:47:07,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 652 states have (on average 1.76840490797546) internal successors, (1153), 946 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:47:07,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 1153 transitions. [2021-11-03 03:47:07,982 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 1153 transitions. Word has length 59 [2021-11-03 03:47:07,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:47:07,983 INFO L470 AbstractCegarLoop]: Abstraction has 947 states and 1153 transitions. [2021-11-03 03:47:07,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.8) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:47:07,983 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 1153 transitions. [2021-11-03 03:47:07,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 03:47:07,984 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:47:07,985 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:47:08,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 03:47:08,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:47:08,199 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr67ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 440 more)] === [2021-11-03 03:47:08,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:47:08,199 INFO L85 PathProgramCache]: Analyzing trace with hash -19181353, now seen corresponding path program 1 times [2021-11-03 03:47:08,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:47:08,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [352486148] [2021-11-03 03:47:08,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:47:08,200 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:47:08,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:47:08,201 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:47:08,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 03:47:08,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:47:08,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 03:47:08,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:47:08,870 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 [2021-11-03 03:47:08,901 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 19 treesize of output 15 [2021-11-03 03:47:08,925 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 [2021-11-03 03:47:09,017 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 39 treesize of output 27 [2021-11-03 03:47:09,020 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 24 treesize of output 12 [2021-11-03 03:47:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:47:09,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:47:09,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:47:09,758 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:47:09,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [352486148] [2021-11-03 03:47:09,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [352486148] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:47:09,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:47:09,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 03:47:09,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144049561] [2021-11-03 03:47:09,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 03:47:09,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:47:09,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 03:47:09,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-03 03:47:09,761 INFO L87 Difference]: Start difference. First operand 947 states and 1153 transitions. Second operand has 10 states, 9 states have (on average 7.666666666666667) internal successors, (69), 10 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:47:26,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:47:26,819 INFO L93 Difference]: Finished difference Result 1287 states and 1521 transitions. [2021-11-03 03:47:26,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 03:47:26,821 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.666666666666667) internal successors, (69), 10 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-03 03:47:26,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:47:26,827 INFO L225 Difference]: With dead ends: 1287 [2021-11-03 03:47:26,827 INFO L226 Difference]: Without dead ends: 1287 [2021-11-03 03:47:26,827 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-03 03:47:26,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-11-03 03:47:26,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 946. [2021-11-03 03:47:26,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 652 states have (on average 1.7653374233128833) internal successors, (1151), 945 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:47:26,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1151 transitions. [2021-11-03 03:47:26,861 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1151 transitions. Word has length 60 [2021-11-03 03:47:26,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:47:26,861 INFO L470 AbstractCegarLoop]: Abstraction has 946 states and 1151 transitions. [2021-11-03 03:47:26,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.666666666666667) internal successors, (69), 10 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:47:26,862 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1151 transitions. [2021-11-03 03:47:26,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-03 03:47:26,863 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:47:26,863 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:47:26,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 03:47:27,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:47:27,079 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 440 more)] === [2021-11-03 03:47:27,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:47:27,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1927168386, now seen corresponding path program 1 times [2021-11-03 03:47:27,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:47:27,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1979361172] [2021-11-03 03:47:27,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:47:27,081 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:47:27,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:47:27,084 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:47:27,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 03:47:27,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:47:27,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:47:27,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:47:27,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:47:27,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:47:27,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:47:27,977 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:47:27,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1979361172] [2021-11-03 03:47:27,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1979361172] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:47:27,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:47:27,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 03:47:27,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60447786] [2021-11-03 03:47:27,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:47:27,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:47:27,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:47:27,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:47:27,979 INFO L87 Difference]: Start difference. First operand 946 states and 1151 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:47:28,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:47:28,121 INFO L93 Difference]: Finished difference Result 1403 states and 1634 transitions. [2021-11-03 03:47:28,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 03:47:28,122 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-03 03:47:28,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:47:28,128 INFO L225 Difference]: With dead ends: 1403 [2021-11-03 03:47:28,128 INFO L226 Difference]: Without dead ends: 1403 [2021-11-03 03:47:28,128 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:47:28,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2021-11-03 03:47:28,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 952. [2021-11-03 03:47:28,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 658 states have (on average 1.7583586626139818) internal successors, (1157), 951 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:47:28,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 1157 transitions. [2021-11-03 03:47:28,151 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 1157 transitions. Word has length 64 [2021-11-03 03:47:28,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:47:28,152 INFO L470 AbstractCegarLoop]: Abstraction has 952 states and 1157 transitions. [2021-11-03 03:47:28,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:47:28,152 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 1157 transitions. [2021-11-03 03:47:28,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-03 03:47:28,153 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:47:28,153 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:47:28,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 03:47:28,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:47:28,371 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 440 more)] === [2021-11-03 03:47:28,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:47:28,372 INFO L85 PathProgramCache]: Analyzing trace with hash -938951394, now seen corresponding path program 1 times [2021-11-03 03:47:28,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:47:28,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [907140491] [2021-11-03 03:47:28,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:47:28,373 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:47:28,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:47:28,373 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:47:28,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 03:47:28,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:47:28,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:47:28,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:47:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:47:29,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:47:29,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:47:29,476 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:47:29,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [907140491] [2021-11-03 03:47:29,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [907140491] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:47:29,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1817794481] [2021-11-03 03:47:29,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:47:29,477 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 03:47:29,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 03:47:29,482 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 03:47:29,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-03 03:47:30,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:47:30,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:47:30,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:47:30,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:47:30,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:47:30,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:47:30,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1817794481] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:47:30,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723832650] [2021-11-03 03:47:30,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:47:30,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:47:30,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:47:30,666 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:47:30,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-03 03:47:31,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:47:31,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:47:31,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:47:31,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:47:31,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:47:31,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:47:31,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723832650] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:47:31,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 03:47:31,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-11-03 03:47:31,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026928214] [2021-11-03 03:47:31,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 03:47:31,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:47:31,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 03:47:31,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-03 03:47:31,725 INFO L87 Difference]: Start difference. First operand 952 states and 1157 transitions. Second operand has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:47:32,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:47:32,340 INFO L93 Difference]: Finished difference Result 1415 states and 1646 transitions. [2021-11-03 03:47:32,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 03:47:32,341 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-03 03:47:32,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:47:32,348 INFO L225 Difference]: With dead ends: 1415 [2021-11-03 03:47:32,348 INFO L226 Difference]: Without dead ends: 1415 [2021-11-03 03:47:32,348 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-11-03 03:47:32,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2021-11-03 03:47:32,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 964. [2021-11-03 03:47:32,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 670 states have (on average 1.7447761194029852) internal successors, (1169), 963 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:47:32,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 1169 transitions. [2021-11-03 03:47:32,371 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 1169 transitions. Word has length 66 [2021-11-03 03:47:32,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:47:32,371 INFO L470 AbstractCegarLoop]: Abstraction has 964 states and 1169 transitions. [2021-11-03 03:47:32,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:47:32,372 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 1169 transitions. [2021-11-03 03:47:32,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-03 03:47:32,373 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:47:32,373 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:47:32,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 03:47:32,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-03 03:47:32,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-03 03:47:32,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:47:32,991 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 440 more)] === [2021-11-03 03:47:32,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:47:32,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1093747294, now seen corresponding path program 2 times [2021-11-03 03:47:32,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:47:32,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [701779493] [2021-11-03 03:47:32,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 03:47:32,993 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:47:32,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:47:32,993 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:47:32,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 03:47:33,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 03:47:33,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:47:33,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 03:47:33,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:47:34,121 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:47:34,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:47:34,719 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:47:34,719 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:47:34,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [701779493] [2021-11-03 03:47:34,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [701779493] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:47:34,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1929351307] [2021-11-03 03:47:34,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 03:47:34,719 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 03:47:34,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 03:47:34,721 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 03:47:34,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-03 03:47:36,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 03:47:36,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:47:36,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 03:47:36,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:47:36,656 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:47:36,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:47:36,901 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:47:36,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1929351307] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:47:36,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429619304] [2021-11-03 03:47:36,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 03:47:36,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:47:36,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:47:36,914 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:47:36,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-03 03:47:53,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 03:47:53,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:47:53,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 03:47:53,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:47:53,604 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:47:53,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:47:53,775 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:47:53,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429619304] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:47:53,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 03:47:53,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 18 [2021-11-03 03:47:53,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069994803] [2021-11-03 03:47:53,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-03 03:47:53,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:47:53,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-03 03:47:53,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-11-03 03:47:53,778 INFO L87 Difference]: Start difference. First operand 964 states and 1169 transitions. Second operand has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:47:56,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:47:56,683 INFO L93 Difference]: Finished difference Result 1439 states and 1670 transitions. [2021-11-03 03:47:56,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-03 03:47:56,684 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-03 03:47:56,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:47:56,690 INFO L225 Difference]: With dead ends: 1439 [2021-11-03 03:47:56,690 INFO L226 Difference]: Without dead ends: 1439 [2021-11-03 03:47:56,691 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=370, Invalid=622, Unknown=0, NotChecked=0, Total=992 [2021-11-03 03:47:56,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2021-11-03 03:47:56,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 988. [2021-11-03 03:47:56,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 694 states have (on average 1.719020172910663) internal successors, (1193), 987 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:47:56,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 1193 transitions. [2021-11-03 03:47:56,711 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 1193 transitions. Word has length 70 [2021-11-03 03:47:56,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:47:56,711 INFO L470 AbstractCegarLoop]: Abstraction has 988 states and 1193 transitions. [2021-11-03 03:47:56,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:47:56,712 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 1193 transitions. [2021-11-03 03:47:56,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-03 03:47:56,712 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:47:56,713 INFO L513 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:47:56,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-03 03:47:56,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 03:47:57,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-03 03:47:57,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:47:57,333 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 440 more)] === [2021-11-03 03:47:57,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:47:57,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1408996130, now seen corresponding path program 3 times [2021-11-03 03:47:57,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:47:57,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1575591908] [2021-11-03 03:47:57,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 03:47:57,336 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:47:57,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:47:57,337 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:47:57,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 03:47:58,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-03 03:47:58,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:47:58,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 03:47:58,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:47:59,415 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:47:59,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:48:01,034 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:48:01,035 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:48:01,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1575591908] [2021-11-03 03:48:01,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1575591908] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:48:01,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1839269551] [2021-11-03 03:48:01,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 03:48:01,036 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 03:48:01,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 03:48:01,037 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 03:48:01,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-03 03:48:09,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-03 03:48:09,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:48:09,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 03:48:09,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:48:09,493 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:48:09,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:48:09,740 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:48:09,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1839269551] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:48:09,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711335429] [2021-11-03 03:48:09,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 03:48:09,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:48:09,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:48:09,742 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:48:09,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aace543-63f9-425d-b4de-86c09667bf1b/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process