./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-2.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_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/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_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/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_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/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 0dff9798a0295b679f16f480562390718a9087ab219890b5f7fb9fb3739a540b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:41:50,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:41:50,966 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:41:51,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:41:51,018 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:41:51,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:41:51,026 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:41:51,031 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:41:51,033 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:41:51,042 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:41:51,043 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:41:51,045 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:41:51,046 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:41:51,050 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:41:51,053 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:41:51,061 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:41:51,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:41:51,067 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:41:51,072 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:41:51,078 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:41:51,086 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:41:51,088 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:41:51,092 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:41:51,094 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:41:51,104 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:41:51,105 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:41:51,106 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:41:51,108 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:41:51,110 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:41:51,112 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:41:51,113 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:41:51,114 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:41:51,117 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:41:51,118 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:41:51,120 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:41:51,121 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:41:51,122 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:41:51,122 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:41:51,123 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:41:51,124 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:41:51,125 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:41:51,126 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-03 03:41:51,190 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:41:51,196 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:41:51,197 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:41:51,206 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:41:51,206 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:41:51,206 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:41:51,207 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 03:41:51,207 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:41:51,207 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:41:51,208 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 03:41:51,208 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 03:41:51,208 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:41:51,208 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 03:41:51,209 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 03:41:51,209 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 03:41:51,210 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 03:41:51,210 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 03:41:51,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:41:51,210 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:41:51,211 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 03:41:51,211 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 03:41:51,211 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:41:51,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:41:51,211 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 03:41:51,211 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 03:41:51,212 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 03:41:51,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:41:51,213 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:41:51,214 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:41:51,214 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:41:51,214 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:41:51,215 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:41:51,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:41:51,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:41:51,216 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:41:51,216 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 03:41:51,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 03:41:51,217 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:41:51,217 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:41:51,217 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_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0dff9798a0295b679f16f480562390718a9087ab219890b5f7fb9fb3739a540b [2021-11-03 03:41:51,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:41:51,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:41:51,616 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:41:51,618 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:41:51,619 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:41:51,620 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-2.i [2021-11-03 03:41:51,703 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/data/b766cc31b/520950585929472d8d7e25ab5c1afc13/FLAG26b7b7576 [2021-11-03 03:41:52,372 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:41:52,373 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-2.i [2021-11-03 03:41:52,414 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/data/b766cc31b/520950585929472d8d7e25ab5c1afc13/FLAG26b7b7576 [2021-11-03 03:41:52,582 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/data/b766cc31b/520950585929472d8d7e25ab5c1afc13 [2021-11-03 03:41:52,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:41:52,586 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:41:52,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:41:52,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:41:52,592 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:41:52,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:41:52" (1/1) ... [2021-11-03 03:41:52,594 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c00f40d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:52, skipping insertion in model container [2021-11-03 03:41:52,595 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:41:52" (1/1) ... [2021-11-03 03:41:52,603 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:41:52,662 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:41:53,132 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_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-2.i[33021,33034] [2021-11-03 03:41:53,309 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_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-2.i[44124,44137] [2021-11-03 03:41:53,310 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_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-2.i[44245,44258] [2021-11-03 03:41:53,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:41:53,339 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 03:41:53,340 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2c4359c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:53, skipping insertion in model container [2021-11-03 03:41:53,340 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:41:53,341 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 03:41:53,343 INFO L168 Benchmark]: Toolchain (without parser) took 755.56 ms. Allocated memory is still 119.5 MB. Free memory was 80.4 MB in the beginning and 83.4 MB in the end (delta: -2.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 03:41:53,345 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 119.5 MB. Free memory was 95.0 MB in the beginning and 95.0 MB in the end (delta: 21.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 03:41:53,346 INFO L168 Benchmark]: CACSL2BoogieTranslator took 752.54 ms. Allocated memory is still 119.5 MB. Free memory was 80.2 MB in the beginning and 83.4 MB in the end (delta: -3.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 03:41:53,348 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 119.5 MB. Free memory was 95.0 MB in the beginning and 95.0 MB in the end (delta: 21.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 752.54 ms. Allocated memory is still 119.5 MB. Free memory was 80.2 MB in the beginning and 83.4 MB in the end (delta: -3.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 716]: 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_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/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_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/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_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/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 0dff9798a0295b679f16f480562390718a9087ab219890b5f7fb9fb3739a540b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:41:55,736 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:41:55,740 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:41:55,814 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:41:55,814 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:41:55,819 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:41:55,821 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:41:55,825 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:41:55,829 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:41:55,837 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:41:55,839 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:41:55,841 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:41:55,841 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:41:55,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:41:55,846 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:41:55,851 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:41:55,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:41:55,853 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:41:55,855 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:41:55,864 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:41:55,866 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:41:55,868 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:41:55,870 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:41:55,873 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:41:55,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:41:55,883 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:41:55,883 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:41:55,885 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:41:55,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:41:55,887 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:41:55,888 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:41:55,889 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:41:55,891 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:41:55,892 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:41:55,894 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:41:55,894 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:41:55,895 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:41:55,896 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:41:55,896 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:41:55,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:41:55,899 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:41:55,899 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-03 03:41:55,944 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:41:55,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:41:55,946 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:41:55,946 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:41:55,947 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:41:55,947 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:41:55,947 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:41:55,947 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:41:55,948 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:41:55,949 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 03:41:55,950 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 03:41:55,951 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:41:55,951 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:41:55,951 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 03:41:55,951 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 03:41:55,952 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:41:55,952 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:41:55,952 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 03:41:55,952 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 03:41:55,952 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 03:41:55,953 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:41:55,953 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:41:55,953 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 03:41:55,953 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 03:41:55,954 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:41:55,954 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:41:55,954 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:41:55,954 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 03:41:55,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:41:55,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:41:55,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:41:55,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:41:55,956 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 03:41:55,956 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 03:41:55,957 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:41:55,957 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:41:55,957 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_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0dff9798a0295b679f16f480562390718a9087ab219890b5f7fb9fb3739a540b [2021-11-03 03:41:56,387 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:41:56,416 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:41:56,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:41:56,421 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:41:56,421 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:41:56,423 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-2.i [2021-11-03 03:41:56,488 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/data/1dad082c5/d2ed0d23dcfd4c4f9eb141b78b1da87d/FLAG25846b48e [2021-11-03 03:41:57,254 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:41:57,262 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-2.i [2021-11-03 03:41:57,280 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/data/1dad082c5/d2ed0d23dcfd4c4f9eb141b78b1da87d/FLAG25846b48e [2021-11-03 03:41:57,422 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/data/1dad082c5/d2ed0d23dcfd4c4f9eb141b78b1da87d [2021-11-03 03:41:57,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:41:57,426 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:41:57,428 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:41:57,428 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:41:57,444 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:41:57,444 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:41:57" (1/1) ... [2021-11-03 03:41:57,445 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77755094 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:57, skipping insertion in model container [2021-11-03 03:41:57,446 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:41:57" (1/1) ... [2021-11-03 03:41:57,453 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:41:57,539 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:41:57,972 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_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-2.i[33021,33034] [2021-11-03 03:41:58,144 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_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-2.i[44124,44137] [2021-11-03 03:41:58,163 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_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-2.i[44245,44258] [2021-11-03 03:41:58,203 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:41:58,220 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 03:41:58,252 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:41:58,301 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_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-2.i[33021,33034] [2021-11-03 03:41:58,374 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_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-2.i[44124,44137] [2021-11-03 03:41:58,375 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_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-2.i[44245,44258] [2021-11-03 03:41:58,405 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:41:58,424 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 03:41:58,476 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_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-2.i[33021,33034] [2021-11-03 03:41:58,587 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_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-2.i[44124,44137] [2021-11-03 03:41:58,588 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_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-2.i[44245,44258] [2021-11-03 03:41:58,614 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:41:58,671 INFO L208 MainTranslator]: Completed translation [2021-11-03 03:41:58,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:58 WrapperNode [2021-11-03 03:41:58,671 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:41:58,673 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 03:41:58,674 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 03:41:58,674 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 03:41:58,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:58" (1/1) ... [2021-11-03 03:41:58,732 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:58" (1/1) ... [2021-11-03 03:41:58,838 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 03:41:58,838 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 03:41:58,839 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 03:41:58,839 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 03:41:58,848 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:58" (1/1) ... [2021-11-03 03:41:58,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:58" (1/1) ... [2021-11-03 03:41:58,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:58" (1/1) ... [2021-11-03 03:41:58,874 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:58" (1/1) ... [2021-11-03 03:41:58,950 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:58" (1/1) ... [2021-11-03 03:41:58,967 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:58" (1/1) ... [2021-11-03 03:41:58,974 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:58" (1/1) ... [2021-11-03 03:41:58,998 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 03:41:58,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 03:41:58,999 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 03:41:58,999 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 03:41:59,000 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:58" (1/1) ... [2021-11-03 03:41:59,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:41:59,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:41:59,041 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 03:41:59,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 03:41:59,091 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 03:41:59,091 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 03:41:59,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 03:41:59,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 03:41:59,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 03:41:59,092 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-03 03:41:59,092 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 03:41:59,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 03:41:59,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 03:41:59,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 03:41:59,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 03:41:59,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 03:42:04,854 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 03:42:04,854 INFO L299 CfgBuilder]: Removed 82 assume(true) statements. [2021-11-03 03:42:04,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:42:04 BoogieIcfgContainer [2021-11-03 03:42:04,859 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 03:42:04,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 03:42:04,861 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 03:42:04,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 03:42:04,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:41:57" (1/3) ... [2021-11-03 03:42:04,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cd09937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:42:04, skipping insertion in model container [2021-11-03 03:42:04,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:41:58" (2/3) ... [2021-11-03 03:42:04,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cd09937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:42:04, skipping insertion in model container [2021-11-03 03:42:04,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:42:04" (3/3) ... [2021-11-03 03:42:04,877 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test7-2.i [2021-11-03 03:42:04,882 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 03:42:04,882 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 635 error locations. [2021-11-03 03:42:04,919 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 03:42:04,926 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 03:42:04,926 INFO L340 AbstractCegarLoop]: Starting to check reachability of 635 error locations. [2021-11-03 03:42:04,974 INFO L276 IsEmpty]: Start isEmpty. Operand has 1253 states, 617 states have (on average 2.2641815235008105) internal successors, (1397), 1252 states have internal predecessors, (1397), 0 states have call successors, (0), 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 03:42:04,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 03:42:04,981 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:04,982 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 03:42:04,982 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 631 more)] === [2021-11-03 03:42:04,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:04,988 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-11-03 03:42:05,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:42:05,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1468435234] [2021-11-03 03:42:05,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:05,012 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:42:05,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:42:05,016 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:42:05,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 03:42:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:05,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 03:42:05,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:42:05,290 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 03:42:05,316 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 03:42:05,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:42:05,356 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 03:42:05,357 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:42:05,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1468435234] [2021-11-03 03:42:05,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1468435234] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:05,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:05,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 03:42:05,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550184451] [2021-11-03 03:42:05,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:42:05,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:42:05,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:42:05,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:42:05,392 INFO L87 Difference]: Start difference. First operand has 1253 states, 617 states have (on average 2.2641815235008105) internal successors, (1397), 1252 states have internal predecessors, (1397), 0 states have call successors, (0), 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 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:07,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:07,913 INFO L93 Difference]: Finished difference Result 1421 states and 1496 transitions. [2021-11-03 03:42:07,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:42:07,916 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-03 03:42:07,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:07,938 INFO L225 Difference]: With dead ends: 1421 [2021-11-03 03:42:07,939 INFO L226 Difference]: Without dead ends: 1419 [2021-11-03 03:42:07,940 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 03:42:07,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2021-11-03 03:42:08,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 1234. [2021-11-03 03:42:08,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 615 states have (on average 2.1154471544715445) internal successors, (1301), 1233 states have internal predecessors, (1301), 0 states have call successors, (0), 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 03:42:08,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1301 transitions. [2021-11-03 03:42:08,034 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1301 transitions. Word has length 3 [2021-11-03 03:42:08,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:08,034 INFO L470 AbstractCegarLoop]: Abstraction has 1234 states and 1301 transitions. [2021-11-03 03:42:08,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:08,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1301 transitions. [2021-11-03 03:42:08,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 03:42:08,035 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:08,035 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 03:42:08,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 03:42:08,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:42:08,247 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 631 more)] === [2021-11-03 03:42:08,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:08,248 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-11-03 03:42:08,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:42:08,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1253171376] [2021-11-03 03:42:08,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:08,249 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:42:08,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:42:08,251 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:42:08,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 03:42:08,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:08,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:42:08,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:42:08,430 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 03:42:08,446 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 03:42:08,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:42:08,502 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 03:42:08,503 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:42:08,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1253171376] [2021-11-03 03:42:08,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1253171376] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:08,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:08,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 03:42:08,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254537018] [2021-11-03 03:42:08,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:42:08,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:42:08,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:42:08,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:42:08,507 INFO L87 Difference]: Start difference. First operand 1234 states and 1301 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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 03:42:14,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:14,534 INFO L93 Difference]: Finished difference Result 1898 states and 2008 transitions. [2021-11-03 03:42:14,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:42:14,536 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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 3 [2021-11-03 03:42:14,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:14,548 INFO L225 Difference]: With dead ends: 1898 [2021-11-03 03:42:14,549 INFO L226 Difference]: Without dead ends: 1898 [2021-11-03 03:42:14,550 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 03:42:14,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2021-11-03 03:42:14,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1269. [2021-11-03 03:42:14,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 659 states have (on average 2.094081942336874) internal successors, (1380), 1268 states have internal predecessors, (1380), 0 states have call successors, (0), 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 03:42:14,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 1380 transitions. [2021-11-03 03:42:14,601 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 1380 transitions. Word has length 3 [2021-11-03 03:42:14,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:14,601 INFO L470 AbstractCegarLoop]: Abstraction has 1269 states and 1380 transitions. [2021-11-03 03:42:14,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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 03:42:14,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 1380 transitions. [2021-11-03 03:42:14,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 03:42:14,602 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:14,603 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:14,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 03:42:14,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:42:14,812 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 631 more)] === [2021-11-03 03:42:14,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:14,812 INFO L85 PathProgramCache]: Analyzing trace with hash 62249618, now seen corresponding path program 1 times [2021-11-03 03:42:14,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:42:14,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632159379] [2021-11-03 03:42:14,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:14,814 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:42:14,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:42:14,815 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:42:14,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 03:42:14,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:14,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 03:42:14,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:42:15,003 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 03:42:15,035 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 03:42:15,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:42:15,063 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 03:42:15,064 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:42:15,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632159379] [2021-11-03 03:42:15,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632159379] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:15,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:15,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 03:42:15,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355630700] [2021-11-03 03:42:15,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:42:15,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:42:15,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:42:15,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:42:15,075 INFO L87 Difference]: Start difference. First operand 1269 states and 1380 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:17,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:17,529 INFO L93 Difference]: Finished difference Result 1599 states and 1735 transitions. [2021-11-03 03:42:17,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:42:17,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-03 03:42:17,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:17,538 INFO L225 Difference]: With dead ends: 1599 [2021-11-03 03:42:17,538 INFO L226 Difference]: Without dead ends: 1599 [2021-11-03 03:42:17,538 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 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 03:42:17,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-11-03 03:42:17,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1222. [2021-11-03 03:42:17,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 659 states have (on average 2.0182094081942337) internal successors, (1330), 1221 states have internal predecessors, (1330), 0 states have call successors, (0), 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 03:42:17,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 1330 transitions. [2021-11-03 03:42:17,569 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 1330 transitions. Word has length 8 [2021-11-03 03:42:17,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:17,570 INFO L470 AbstractCegarLoop]: Abstraction has 1222 states and 1330 transitions. [2021-11-03 03:42:17,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:17,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 1330 transitions. [2021-11-03 03:42:17,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 03:42:17,571 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:17,571 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:17,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-03 03:42:17,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:42:17,782 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 631 more)] === [2021-11-03 03:42:17,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:17,783 INFO L85 PathProgramCache]: Analyzing trace with hash 62249619, now seen corresponding path program 1 times [2021-11-03 03:42:17,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:42:17,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [714580673] [2021-11-03 03:42:17,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:17,784 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:42:17,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:42:17,785 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:42:17,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 03:42:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:17,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:42:17,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:42:17,955 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 03:42:17,999 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 03:42:17,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:42:18,091 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 03:42:18,092 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:42:18,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [714580673] [2021-11-03 03:42:18,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [714580673] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:18,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:18,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 03:42:18,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880513729] [2021-11-03 03:42:18,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:42:18,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:42:18,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:42:18,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:42:18,094 INFO L87 Difference]: Start difference. First operand 1222 states and 1330 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 03:42:23,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:23,397 INFO L93 Difference]: Finished difference Result 1643 states and 1743 transitions. [2021-11-03 03:42:23,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:42:23,398 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-03 03:42:23,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:23,406 INFO L225 Difference]: With dead ends: 1643 [2021-11-03 03:42:23,407 INFO L226 Difference]: Without dead ends: 1643 [2021-11-03 03:42:23,407 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 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 03:42:23,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2021-11-03 03:42:23,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1212. [2021-11-03 03:42:23,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 659 states have (on average 1.9984825493171472) internal successors, (1317), 1211 states have internal predecessors, (1317), 0 states have call successors, (0), 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 03:42:23,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 1317 transitions. [2021-11-03 03:42:23,436 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 1317 transitions. Word has length 8 [2021-11-03 03:42:23,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:23,437 INFO L470 AbstractCegarLoop]: Abstraction has 1212 states and 1317 transitions. [2021-11-03 03:42:23,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 03:42:23,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 1317 transitions. [2021-11-03 03:42:23,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-03 03:42:23,438 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:23,438 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:23,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 03:42:23,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:42:23,650 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr526ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 631 more)] === [2021-11-03 03:42:23,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:23,651 INFO L85 PathProgramCache]: Analyzing trace with hash -945573268, now seen corresponding path program 1 times [2021-11-03 03:42:23,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:42:23,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [440226429] [2021-11-03 03:42:23,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:23,652 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:42:23,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:42:23,653 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:42:23,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 03:42:23,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:23,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:42:23,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:42:23,906 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 03:42:23,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:42:24,000 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 03:42:24,000 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:42:24,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [440226429] [2021-11-03 03:42:24,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [440226429] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:24,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:24,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 03:42:24,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186773583] [2021-11-03 03:42:24,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:42:24,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:42:24,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:42:24,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:42:24,009 INFO L87 Difference]: Start difference. First operand 1212 states and 1317 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:25,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:25,041 INFO L93 Difference]: Finished difference Result 1855 states and 2002 transitions. [2021-11-03 03:42:25,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:42:25,042 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-03 03:42:25,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:25,053 INFO L225 Difference]: With dead ends: 1855 [2021-11-03 03:42:25,053 INFO L226 Difference]: Without dead ends: 1855 [2021-11-03 03:42:25,054 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 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 03:42:25,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1855 states. [2021-11-03 03:42:25,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1855 to 1453. [2021-11-03 03:42:25,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 900 states have (on average 1.968888888888889) internal successors, (1772), 1452 states have internal predecessors, (1772), 0 states have call successors, (0), 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 03:42:25,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 1772 transitions. [2021-11-03 03:42:25,092 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 1772 transitions. Word has length 11 [2021-11-03 03:42:25,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:25,093 INFO L470 AbstractCegarLoop]: Abstraction has 1453 states and 1772 transitions. [2021-11-03 03:42:25,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:25,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 1772 transitions. [2021-11-03 03:42:25,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 03:42:25,094 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:25,094 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:25,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 03:42:25,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:42:25,306 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr340REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 631 more)] === [2021-11-03 03:42:25,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:25,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1258779124, now seen corresponding path program 1 times [2021-11-03 03:42:25,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:42:25,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2060912167] [2021-11-03 03:42:25,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:25,307 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:42:25,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:42:25,308 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:42:25,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 03:42:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:25,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 03:42:25,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:42:25,532 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 03:42:25,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:42:25,569 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 03:42:25,569 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:42:25,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2060912167] [2021-11-03 03:42:25,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2060912167] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:25,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:25,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 03:42:25,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519928853] [2021-11-03 03:42:25,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:42:25,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:42:25,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:42:25,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:42:25,572 INFO L87 Difference]: Start difference. First operand 1453 states and 1772 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 03:42:25,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:25,607 INFO L93 Difference]: Finished difference Result 1615 states and 1920 transitions. [2021-11-03 03:42:25,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:42:25,608 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 03:42:25,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:25,616 INFO L225 Difference]: With dead ends: 1615 [2021-11-03 03:42:25,616 INFO L226 Difference]: Without dead ends: 1615 [2021-11-03 03:42:25,617 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 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 03:42:25,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2021-11-03 03:42:25,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 1393. [2021-11-03 03:42:25,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 864 states have (on average 1.9513888888888888) internal successors, (1686), 1392 states have internal predecessors, (1686), 0 states have call successors, (0), 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 03:42:25,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 1686 transitions. [2021-11-03 03:42:25,649 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 1686 transitions. Word has length 13 [2021-11-03 03:42:25,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:25,649 INFO L470 AbstractCegarLoop]: Abstraction has 1393 states and 1686 transitions. [2021-11-03 03:42:25,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 03:42:25,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 1686 transitions. [2021-11-03 03:42:25,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-03 03:42:25,651 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:25,651 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:25,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 03:42:25,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:42:25,863 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr364REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 631 more)] === [2021-11-03 03:42:25,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:25,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1494013586, now seen corresponding path program 1 times [2021-11-03 03:42:25,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:42:25,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875938828] [2021-11-03 03:42:25,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:25,865 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:42:25,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:42:25,866 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:42:25,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 03:42:26,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:26,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:42:26,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:42:26,099 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 03:42:26,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:42:26,144 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 03:42:26,145 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:42:26,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875938828] [2021-11-03 03:42:26,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1875938828] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:26,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:26,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 03:42:26,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106244824] [2021-11-03 03:42:26,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:42:26,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:42:26,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:42:26,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:42:26,147 INFO L87 Difference]: Start difference. First operand 1393 states and 1686 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:26,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:26,237 INFO L93 Difference]: Finished difference Result 1587 states and 1864 transitions. [2021-11-03 03:42:26,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:42:26,239 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-03 03:42:26,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:26,247 INFO L225 Difference]: With dead ends: 1587 [2021-11-03 03:42:26,247 INFO L226 Difference]: Without dead ends: 1587 [2021-11-03 03:42:26,248 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 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 03:42:26,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2021-11-03 03:42:26,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 1363. [2021-11-03 03:42:26,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 848 states have (on average 1.919811320754717) internal successors, (1628), 1362 states have internal predecessors, (1628), 0 states have call successors, (0), 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 03:42:26,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 1628 transitions. [2021-11-03 03:42:26,281 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 1628 transitions. Word has length 15 [2021-11-03 03:42:26,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:26,281 INFO L470 AbstractCegarLoop]: Abstraction has 1363 states and 1628 transitions. [2021-11-03 03:42:26,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:26,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 1628 transitions. [2021-11-03 03:42:26,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-03 03:42:26,282 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:26,283 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:26,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 03:42:26,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:42:26,494 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr634ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 631 more)] === [2021-11-03 03:42:26,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:26,495 INFO L85 PathProgramCache]: Analyzing trace with hash 50590223, now seen corresponding path program 1 times [2021-11-03 03:42:26,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:42:26,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1074678897] [2021-11-03 03:42:26,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:26,497 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:42:26,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:42:26,502 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:42:26,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 03:42:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:26,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:42:26,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:42:26,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:42:26,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:42:26,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:42:26,760 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-03 03:42:26,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-03 03:42:26,820 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-03 03:42:26,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-03 03:42:26,861 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 03:42:26,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:42:26,940 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 03:42:26,940 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:42:26,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1074678897] [2021-11-03 03:42:26,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1074678897] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:26,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:26,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 03:42:26,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963596178] [2021-11-03 03:42:26,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:42:26,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:42:26,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:42:26,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:42:26,942 INFO L87 Difference]: Start difference. First operand 1363 states and 1628 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 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 03:42:28,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:28,348 INFO L93 Difference]: Finished difference Result 1799 states and 2123 transitions. [2021-11-03 03:42:28,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:42:28,350 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 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 16 [2021-11-03 03:42:28,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:28,357 INFO L225 Difference]: With dead ends: 1799 [2021-11-03 03:42:28,357 INFO L226 Difference]: Without dead ends: 1799 [2021-11-03 03:42:28,357 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 03:42:28,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2021-11-03 03:42:28,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 1362. [2021-11-03 03:42:28,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 847 states have (on average 1.9197166469893743) internal successors, (1626), 1361 states have internal predecessors, (1626), 0 states have call successors, (0), 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 03:42:28,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 1626 transitions. [2021-11-03 03:42:28,385 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 1626 transitions. Word has length 16 [2021-11-03 03:42:28,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:28,386 INFO L470 AbstractCegarLoop]: Abstraction has 1362 states and 1626 transitions. [2021-11-03 03:42:28,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 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 03:42:28,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 1626 transitions. [2021-11-03 03:42:28,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-03 03:42:28,387 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:28,387 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:28,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 03:42:28,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:42:28,601 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 631 more)] === [2021-11-03 03:42:28,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:28,601 INFO L85 PathProgramCache]: Analyzing trace with hash -520774338, now seen corresponding path program 1 times [2021-11-03 03:42:28,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:42:28,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [200382591] [2021-11-03 03:42:28,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:28,602 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:42:28,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:42:28,603 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:42:28,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 03:42:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:28,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 03:42:28,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:42:28,825 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 03:42:28,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:42:28,863 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 03:42:28,863 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:42:28,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [200382591] [2021-11-03 03:42:28,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [200382591] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:28,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:28,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 03:42:28,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155468126] [2021-11-03 03:42:28,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:42:28,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:42:28,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:42:28,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:42:28,866 INFO L87 Difference]: Start difference. First operand 1362 states and 1626 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:28,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:28,897 INFO L93 Difference]: Finished difference Result 1302 states and 1540 transitions. [2021-11-03 03:42:28,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:42:28,898 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-03 03:42:28,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:28,905 INFO L225 Difference]: With dead ends: 1302 [2021-11-03 03:42:28,905 INFO L226 Difference]: Without dead ends: 1302 [2021-11-03 03:42:28,905 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 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 03:42:28,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2021-11-03 03:42:28,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1302. [2021-11-03 03:42:28,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 811 states have (on average 1.8988902589395809) internal successors, (1540), 1301 states have internal predecessors, (1540), 0 states have call successors, (0), 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 03:42:28,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 1540 transitions. [2021-11-03 03:42:28,929 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 1540 transitions. Word has length 18 [2021-11-03 03:42:28,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:28,929 INFO L470 AbstractCegarLoop]: Abstraction has 1302 states and 1540 transitions. [2021-11-03 03:42:28,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:28,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 1540 transitions. [2021-11-03 03:42:28,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-03 03:42:28,930 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:28,931 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] [2021-11-03 03:42:28,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 03:42:29,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:42:29,143 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 631 more)] === [2021-11-03 03:42:29,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:29,143 INFO L85 PathProgramCache]: Analyzing trace with hash 2047030904, now seen corresponding path program 1 times [2021-11-03 03:42:29,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:42:29,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [227786680] [2021-11-03 03:42:29,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:29,144 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:42:29,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:42:29,145 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:42:29,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 03:42:29,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:29,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:42:29,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:42:29,380 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 03:42:29,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:42:29,425 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 03:42:29,426 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:42:29,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [227786680] [2021-11-03 03:42:29,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [227786680] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:29,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:29,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 03:42:29,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18142158] [2021-11-03 03:42:29,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:42:29,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:42:29,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:42:29,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:42:29,428 INFO L87 Difference]: Start difference. First operand 1302 states and 1540 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 03:42:29,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:29,487 INFO L93 Difference]: Finished difference Result 1274 states and 1484 transitions. [2021-11-03 03:42:29,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:42:29,498 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-03 03:42:29,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:29,504 INFO L225 Difference]: With dead ends: 1274 [2021-11-03 03:42:29,504 INFO L226 Difference]: Without dead ends: 1274 [2021-11-03 03:42:29,504 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 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 03:42:29,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-11-03 03:42:29,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1272. [2021-11-03 03:42:29,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 795 states have (on average 1.8641509433962264) internal successors, (1482), 1271 states have internal predecessors, (1482), 0 states have call successors, (0), 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 03:42:29,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1482 transitions. [2021-11-03 03:42:29,525 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1482 transitions. Word has length 20 [2021-11-03 03:42:29,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:29,525 INFO L470 AbstractCegarLoop]: Abstraction has 1272 states and 1482 transitions. [2021-11-03 03:42:29,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 03:42:29,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1482 transitions. [2021-11-03 03:42:29,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-03 03:42:29,527 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:29,527 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] [2021-11-03 03:42:29,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 03:42:29,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:42:29,739 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 631 more)] === [2021-11-03 03:42:29,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:29,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1406589690, now seen corresponding path program 1 times [2021-11-03 03:42:29,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:42:29,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [272417404] [2021-11-03 03:42:29,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:29,741 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:42:29,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:42:29,742 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:42:29,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 03:42:29,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:29,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:42:29,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:42:29,989 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 03:42:30,124 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 03:42:30,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:42:30,270 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 03:42:30,271 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:42:30,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [272417404] [2021-11-03 03:42:30,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [272417404] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:30,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:30,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 03:42:30,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891723760] [2021-11-03 03:42:30,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:42:30,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:42:30,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:42:30,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:42:30,273 INFO L87 Difference]: Start difference. First operand 1272 states and 1482 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:33,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:33,020 INFO L93 Difference]: Finished difference Result 1854 states and 2186 transitions. [2021-11-03 03:42:33,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:42:33,021 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-03 03:42:33,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:33,030 INFO L225 Difference]: With dead ends: 1854 [2021-11-03 03:42:33,030 INFO L226 Difference]: Without dead ends: 1854 [2021-11-03 03:42:33,031 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 64 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 03:42:33,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2021-11-03 03:42:33,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1268. [2021-11-03 03:42:33,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1268 states, 795 states have (on average 1.8540880503144654) internal successors, (1474), 1267 states have internal predecessors, (1474), 0 states have call successors, (0), 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 03:42:33,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1268 states to 1268 states and 1474 transitions. [2021-11-03 03:42:33,055 INFO L78 Accepts]: Start accepts. Automaton has 1268 states and 1474 transitions. Word has length 34 [2021-11-03 03:42:33,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:33,057 INFO L470 AbstractCegarLoop]: Abstraction has 1268 states and 1474 transitions. [2021-11-03 03:42:33,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:33,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1268 states and 1474 transitions. [2021-11-03 03:42:33,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-03 03:42:33,063 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:33,063 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] [2021-11-03 03:42:33,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 03:42:33,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:42:33,276 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 631 more)] === [2021-11-03 03:42:33,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:33,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1406589689, now seen corresponding path program 1 times [2021-11-03 03:42:33,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:42:33,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916349291] [2021-11-03 03:42:33,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:33,278 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:42:33,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:42:33,279 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:42:33,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 03:42:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:33,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:42:33,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:42:33,514 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 03:42:33,791 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 03:42:33,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:42:34,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:34,299 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:42:34,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916349291] [2021-11-03 03:42:34,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916349291] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:34,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:34,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 03:42:34,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122819917] [2021-11-03 03:42:34,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:42:34,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:42:34,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:42:34,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:42:34,301 INFO L87 Difference]: Start difference. First operand 1268 states and 1474 transitions. Second operand has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 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 03:42:41,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:41,070 INFO L93 Difference]: Finished difference Result 1981 states and 2290 transitions. [2021-11-03 03:42:41,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 03:42:41,071 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-03 03:42:41,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:41,079 INFO L225 Difference]: With dead ends: 1981 [2021-11-03 03:42:41,079 INFO L226 Difference]: Without dead ends: 1981 [2021-11-03 03:42:41,079 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:42:41,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1981 states. [2021-11-03 03:42:41,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1981 to 1264. [2021-11-03 03:42:41,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 795 states have (on average 1.8440251572327044) internal successors, (1466), 1263 states have internal predecessors, (1466), 0 states have call successors, (0), 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 03:42:41,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 1466 transitions. [2021-11-03 03:42:41,103 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 1466 transitions. Word has length 34 [2021-11-03 03:42:41,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:41,104 INFO L470 AbstractCegarLoop]: Abstraction has 1264 states and 1466 transitions. [2021-11-03 03:42:41,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 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 03:42:41,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 1466 transitions. [2021-11-03 03:42:41,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-03 03:42:41,106 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:41,106 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:42:41,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 03:42:41,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:42:41,319 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 631 more)] === [2021-11-03 03:42:41,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:41,319 INFO L85 PathProgramCache]: Analyzing trace with hash -489765179, now seen corresponding path program 1 times [2021-11-03 03:42:41,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:42:41,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1811120] [2021-11-03 03:42:41,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:41,320 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:42:41,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:42:41,321 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:42:41,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 03:42:41,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:41,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:42:41,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:42:41,826 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 03:42:41,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:42:41,970 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 03:42:41,970 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:42:41,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1811120] [2021-11-03 03:42:41,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1811120] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:41,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:41,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 03:42:41,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121560615] [2021-11-03 03:42:41,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:42:41,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:42:41,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:42:41,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:42:41,975 INFO L87 Difference]: Start difference. First operand 1264 states and 1466 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:42,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:42:42,037 INFO L93 Difference]: Finished difference Result 1252 states and 1446 transitions. [2021-11-03 03:42:42,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:42:42,038 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-03 03:42:42,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:42:42,046 INFO L225 Difference]: With dead ends: 1252 [2021-11-03 03:42:42,047 INFO L226 Difference]: Without dead ends: 1252 [2021-11-03 03:42:42,047 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 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 03:42:42,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2021-11-03 03:42:42,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 1252. [2021-11-03 03:42:42,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1252 states, 783 states have (on average 1.8467432950191571) internal successors, (1446), 1251 states have internal predecessors, (1446), 0 states have call successors, (0), 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 03:42:42,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 1446 transitions. [2021-11-03 03:42:42,069 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 1446 transitions. Word has length 52 [2021-11-03 03:42:42,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:42:42,070 INFO L470 AbstractCegarLoop]: Abstraction has 1252 states and 1446 transitions. [2021-11-03 03:42:42,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:42:42,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 1446 transitions. [2021-11-03 03:42:42,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 03:42:42,073 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:42:42,074 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 03:42:42,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 03:42:42,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:42:42,289 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 631 more)] === [2021-11-03 03:42:42,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:42:42,289 INFO L85 PathProgramCache]: Analyzing trace with hash -531678063, now seen corresponding path program 1 times [2021-11-03 03:42:42,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:42:42,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2081096449] [2021-11-03 03:42:42,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:42:42,290 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:42:42,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:42:42,291 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:42:42,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 03:42:42,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:42:42,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 03:42:42,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:42:42,852 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 03:42:42,861 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 03:42:43,685 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-03 03:42:43,686 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 03:42:43,702 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-03 03:42:43,702 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 03:42:43,748 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 03:42:43,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:42:49,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:42:49,257 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:42:49,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2081096449] [2021-11-03 03:42:49,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2081096449] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:42:49,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:42:49,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 03:42:49,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033932310] [2021-11-03 03:42:49,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:42:49,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:42:49,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:42:49,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-03 03:42:49,260 INFO L87 Difference]: Start difference. First operand 1252 states and 1446 transitions. Second operand has 6 states, 5 states have (on average 23.2) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 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 03:43:06,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:43:06,140 INFO L93 Difference]: Finished difference Result 2049 states and 2489 transitions. [2021-11-03 03:43:06,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 03:43:06,141 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 23.2) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 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 03:43:06,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:43:06,151 INFO L225 Difference]: With dead ends: 2049 [2021-11-03 03:43:06,152 INFO L226 Difference]: Without dead ends: 2049 [2021-11-03 03:43:06,152 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=26, Invalid=28, Unknown=2, NotChecked=0, Total=56 [2021-11-03 03:43:06,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2021-11-03 03:43:06,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1214. [2021-11-03 03:43:06,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 783 states have (on average 1.7982120051085568) internal successors, (1408), 1213 states have internal predecessors, (1408), 0 states have call successors, (0), 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 03:43:06,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 1408 transitions. [2021-11-03 03:43:06,177 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 1408 transitions. Word has length 60 [2021-11-03 03:43:06,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:43:06,178 INFO L470 AbstractCegarLoop]: Abstraction has 1214 states and 1408 transitions. [2021-11-03 03:43:06,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 23.2) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 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 03:43:06,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 1408 transitions. [2021-11-03 03:43:06,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-03 03:43:06,179 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:43:06,179 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:43:06,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 03:43:06,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:43:06,394 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr76ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 631 more)] === [2021-11-03 03:43:06,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:43:06,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1426362414, now seen corresponding path program 1 times [2021-11-03 03:43:06,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:43:06,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [739020783] [2021-11-03 03:43:06,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:43:06,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:43:06,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:43:06,396 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:43:06,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 03:43:06,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:43:06,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:43:06,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:43:06,946 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 03:43:06,962 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 22 treesize of output 18 [2021-11-03 03:43:07,019 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 03:43:07,062 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 03:43:07,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:43:07,238 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 03:43:07,238 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:43:07,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [739020783] [2021-11-03 03:43:07,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [739020783] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:43:07,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:43:07,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 03:43:07,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899138278] [2021-11-03 03:43:07,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:43:07,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:43:07,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:43:07,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:43:07,240 INFO L87 Difference]: Start difference. First operand 1214 states and 1408 transitions. Second operand has 6 states, 5 states have (on average 13.2) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:43:13,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:43:13,468 INFO L93 Difference]: Finished difference Result 1993 states and 2318 transitions. [2021-11-03 03:43:13,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 03:43:13,469 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-03 03:43:13,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:43:13,477 INFO L225 Difference]: With dead ends: 1993 [2021-11-03 03:43:13,477 INFO L226 Difference]: Without dead ends: 1993 [2021-11-03 03:43:13,478 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 125 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 03:43:13,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2021-11-03 03:43:13,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1213. [2021-11-03 03:43:13,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 783 states have (on average 1.7969348659003832) internal successors, (1407), 1212 states have internal predecessors, (1407), 0 states have call successors, (0), 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 03:43:13,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 1407 transitions. [2021-11-03 03:43:13,499 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 1407 transitions. Word has length 66 [2021-11-03 03:43:13,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:43:13,499 INFO L470 AbstractCegarLoop]: Abstraction has 1213 states and 1407 transitions. [2021-11-03 03:43:13,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:43:13,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 1407 transitions. [2021-11-03 03:43:13,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-03 03:43:13,500 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:43:13,500 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:43:13,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-03 03:43:13,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:43:13,715 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr77ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 631 more)] === [2021-11-03 03:43:13,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:43:13,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1267561538, now seen corresponding path program 1 times [2021-11-03 03:43:13,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:43:13,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2075155864] [2021-11-03 03:43:13,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:43:13,716 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:43:13,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:43:13,718 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:43:13,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 03:43:14,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:43:14,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 03:43:14,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:43:14,339 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 03:43:14,375 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 03:43:14,386 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 03:43:14,458 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 03:43:14,461 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 03:43:14,532 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 03:43:14,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:43:15,003 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 03:43:15,004 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:43:15,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2075155864] [2021-11-03 03:43:15,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2075155864] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:43:15,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:43:15,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 03:43:15,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900032068] [2021-11-03 03:43:15,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 03:43:15,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:43:15,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 03:43:15,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-03 03:43:15,005 INFO L87 Difference]: Start difference. First operand 1213 states and 1407 transitions. Second operand has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:43:32,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:43:32,894 INFO L93 Difference]: Finished difference Result 1917 states and 2219 transitions. [2021-11-03 03:43:32,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 03:43:32,895 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-03 03:43:32,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:43:32,903 INFO L225 Difference]: With dead ends: 1917 [2021-11-03 03:43:32,903 INFO L226 Difference]: Without dead ends: 1917 [2021-11-03 03:43:32,903 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-03 03:43:32,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2021-11-03 03:43:32,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1212. [2021-11-03 03:43:32,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 783 states have (on average 1.7956577266922094) internal successors, (1406), 1211 states have internal predecessors, (1406), 0 states have call successors, (0), 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 03:43:32,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 1406 transitions. [2021-11-03 03:43:32,920 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 1406 transitions. Word has length 67 [2021-11-03 03:43:32,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:43:32,921 INFO L470 AbstractCegarLoop]: Abstraction has 1212 states and 1406 transitions. [2021-11-03 03:43:32,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:43:32,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 1406 transitions. [2021-11-03 03:43:32,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-03 03:43:32,921 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:43:32,921 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:43:32,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 03:43:33,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:43:33,122 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 631 more)] === [2021-11-03 03:43:33,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:43:33,122 INFO L85 PathProgramCache]: Analyzing trace with hash -582276570, now seen corresponding path program 1 times [2021-11-03 03:43:33,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:43:33,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [79036740] [2021-11-03 03:43:33,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:43:33,123 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:43:33,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:43:33,124 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:43:33,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 03:43:33,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:43:33,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:43:33,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:43:33,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:43:33,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:43:33,978 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 03:43:33,979 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:43:33,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [79036740] [2021-11-03 03:43:33,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [79036740] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:43:33,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:43:33,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 03:43:33,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260569820] [2021-11-03 03:43:33,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:43:33,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:43:33,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:43:33,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:43:33,981 INFO L87 Difference]: Start difference. First operand 1212 states and 1406 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:43:34,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:43:34,140 INFO L93 Difference]: Finished difference Result 2075 states and 2413 transitions. [2021-11-03 03:43:34,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 03:43:34,141 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-03 03:43:34,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:43:34,150 INFO L225 Difference]: With dead ends: 2075 [2021-11-03 03:43:34,150 INFO L226 Difference]: Without dead ends: 2075 [2021-11-03 03:43:34,150 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 136 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 03:43:34,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2021-11-03 03:43:34,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 1215. [2021-11-03 03:43:34,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 786 states have (on average 1.7926208651399491) internal successors, (1409), 1214 states have internal predecessors, (1409), 0 states have call successors, (0), 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 03:43:34,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 1409 transitions. [2021-11-03 03:43:34,168 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 1409 transitions. Word has length 71 [2021-11-03 03:43:34,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:43:34,168 INFO L470 AbstractCegarLoop]: Abstraction has 1215 states and 1409 transitions. [2021-11-03 03:43:34,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:43:34,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 1409 transitions. [2021-11-03 03:43:34,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 03:43:34,169 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:43:34,169 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:43:34,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-03 03:43:34,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:43:34,374 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 631 more)] === [2021-11-03 03:43:34,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:43:34,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1283072730, now seen corresponding path program 1 times [2021-11-03 03:43:34,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:43:34,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [732861159] [2021-11-03 03:43:34,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:43:34,375 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:43:34,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:43:34,378 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:43:34,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 03:43:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:43:34,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:43:34,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:43:35,149 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 03:43:35,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:43:35,371 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 03:43:35,371 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:43:35,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [732861159] [2021-11-03 03:43:35,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [732861159] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:43:35,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1122420482] [2021-11-03 03:43:35,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:43:35,372 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 03:43:35,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 03:43:35,397 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 03:43:35,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-03 03:43:36,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:43:36,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:43:36,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:43:36,311 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 03:43:36,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:43:36,465 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 03:43:36,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1122420482] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:43:36,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481137761] [2021-11-03 03:43:36,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:43:36,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:43:36,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:43:36,466 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:43:36,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-03 03:43:37,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:43:37,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:43:37,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:43:37,366 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 03:43:37,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:43:37,511 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 03:43:37,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481137761] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:43:37,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 03:43:37,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-11-03 03:43:37,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578009723] [2021-11-03 03:43:37,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 03:43:37,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:43:37,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 03:43:37,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-03 03:43:37,513 INFO L87 Difference]: Start difference. First operand 1215 states and 1409 transitions. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:43:38,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:43:38,087 INFO L93 Difference]: Finished difference Result 2081 states and 2419 transitions. [2021-11-03 03:43:38,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 03:43:38,088 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-03 03:43:38,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:43:38,095 INFO L225 Difference]: With dead ends: 2081 [2021-11-03 03:43:38,095 INFO L226 Difference]: Without dead ends: 2081 [2021-11-03 03:43:38,096 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-11-03 03:43:38,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2081 states. [2021-11-03 03:43:38,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2081 to 1221. [2021-11-03 03:43:38,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 792 states have (on average 1.7866161616161615) internal successors, (1415), 1220 states have internal predecessors, (1415), 0 states have call successors, (0), 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 03:43:38,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 1415 transitions. [2021-11-03 03:43:38,114 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 1415 transitions. Word has length 73 [2021-11-03 03:43:38,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:43:38,115 INFO L470 AbstractCegarLoop]: Abstraction has 1221 states and 1415 transitions. [2021-11-03 03:43:38,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:43:38,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 1415 transitions. [2021-11-03 03:43:38,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-03 03:43:38,115 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:43:38,116 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:43:38,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 03:43:38,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-03 03:43:38,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-03 03:43:38,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 03:43:38,719 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 631 more)] === [2021-11-03 03:43:38,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:43:38,719 INFO L85 PathProgramCache]: Analyzing trace with hash -376896730, now seen corresponding path program 2 times [2021-11-03 03:43:38,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:43:38,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1039610800] [2021-11-03 03:43:38,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 03:43:38,720 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:43:38,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:43:38,721 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:43:38,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 03:43:39,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 03:43:39,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:43:39,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 03:43:39,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:43:39,947 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 03:43:39,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:43:40,485 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 03:43:40,485 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:43:40,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1039610800] [2021-11-03 03:43:40,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1039610800] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:43:40,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [624167882] [2021-11-03 03:43:40,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 03:43:40,485 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 03:43:40,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 03:43:40,486 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 03:43:40,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-03 03:43:41,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 03:43:41,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:43:41,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 03:43:41,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:43:42,142 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 03:43:42,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:43:42,322 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 03:43:42,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [624167882] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:43:42,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308416072] [2021-11-03 03:43:42,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 03:43:42,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:43:42,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:43:42,326 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:43:42,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-03 03:44:25,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 03:44:25,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:44:25,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-03 03:44:25,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:44:25,360 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 03:44:25,376 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-03 03:44:25,376 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 19 treesize of output 19 [2021-11-03 03:44:25,451 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 03:44:25,459 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 23 treesize of output 19 [2021-11-03 03:44:25,863 INFO L354 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2021-11-03 03:44:25,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 68 treesize of output 67 [2021-11-03 03:44:25,891 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-03 03:44:25,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 64 treesize of output 51 [2021-11-03 03:44:26,145 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-03 03:44:26,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 90 [2021-11-03 03:44:26,215 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 03:44:26,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 74 [2021-11-03 03:44:26,486 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-03 03:44:26,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 90 [2021-11-03 03:44:26,540 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 03:44:26,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 74 [2021-11-03 03:44:26,820 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-03 03:44:26,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 90 [2021-11-03 03:44:26,884 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 03:44:26,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 74 [2021-11-03 03:44:31,363 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-03 03:44:31,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 90 [2021-11-03 03:44:31,423 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 03:44:31,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 74 [2021-11-03 03:44:33,178 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 03:44:33,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 78 [2021-11-03 03:44:33,245 INFO L354 Elim1Store]: treesize reduction 104, result has 19.4 percent of original size [2021-11-03 03:44:33,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 101 [2021-11-03 03:44:33,757 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-03 03:44:33,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 62 [2021-11-03 03:44:33,778 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-03 03:44:33,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 26 [2021-11-03 03:44:33,859 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-03 03:44:33,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:45:25,719 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr278| (_ BitVec 32)) (v_subst_10 (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#ptr.offset| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#value| (_ BitVec 32))) (let ((.cse0 (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr278| |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|)) (.cse2 (bvadd v_subst_10 |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|)) (.cse3 (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base| (let ((.cse1 ((_ zero_extend 24) ((_ extract 7 0) |ULTIMATE.start_#Ultimate.C_memset_#value|)))) (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base|) .cse0 .cse1) .cse2 .cse1))) c_ULTIMATE.start_main_~user~0.base) .cse3) (_ bv20 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base| (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base|) .cse0 (_ bv0 32)) .cse2 (_ bv0 32))) c_ULTIMATE.start_main_~user~0.base) .cse3))))) (forall ((|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr278| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#ptr.offset| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#value| (_ BitVec 32)) (v_subst_9 (_ BitVec 32))) (let ((.cse4 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base| (let ((.cse5 ((_ zero_extend 24) ((_ extract 7 0) |ULTIMATE.start_#Ultimate.C_memset_#value|)))) (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base|) (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr278| |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) .cse5) (bvadd v_subst_9 |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) .cse5))) c_ULTIMATE.start_main_~user~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset)))) (bvule (bvadd (_ bv16 32) .cse4) (bvadd .cse4 (_ bv20 32)))))) is different from false [2021-11-03 03:46:15,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 26 treesize of output 24 [2021-11-03 03:46:15,921 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 6 not checked. [2021-11-03 03:46:15,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308416072] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:46:15,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 03:46:15,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 9, 9] total 33 [2021-11-03 03:46:15,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576623790] [2021-11-03 03:46:15,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-03 03:46:15,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:46:15,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-03 03:46:15,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=838, Unknown=7, NotChecked=60, Total=1056 [2021-11-03 03:46:15,924 INFO L87 Difference]: Start difference. First operand 1221 states and 1415 transitions. Second operand has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 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 03:48:08,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:48:08,208 INFO L93 Difference]: Finished difference Result 2858 states and 3429 transitions. [2021-11-03 03:48:08,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-03 03:48:08,209 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-03 03:48:08,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:48:08,214 INFO L225 Difference]: With dead ends: 2858 [2021-11-03 03:48:08,214 INFO L226 Difference]: Without dead ends: 2858 [2021-11-03 03:48:08,216 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 417 SyntacticMatches, 9 SemanticMatches, 68 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1346 ImplicationChecksByTransitivity, 106.5s TimeCoverageRelationStatistics Valid=977, Invalid=3711, Unknown=8, NotChecked=134, Total=4830 [2021-11-03 03:48:08,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2858 states. [2021-11-03 03:48:08,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2858 to 1232. [2021-11-03 03:48:08,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 804 states have (on average 1.7736318407960199) internal successors, (1426), 1231 states have internal predecessors, (1426), 0 states have call successors, (0), 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 03:48:08,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 1426 transitions. [2021-11-03 03:48:08,239 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 1426 transitions. Word has length 77 [2021-11-03 03:48:08,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:48:08,239 INFO L470 AbstractCegarLoop]: Abstraction has 1232 states and 1426 transitions. [2021-11-03 03:48:08,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.151515151515151) internal successors, (170), 33 states have internal predecessors, (170), 0 states have call successors, (0), 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 03:48:08,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 1426 transitions. [2021-11-03 03:48:08,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-03 03:48:08,240 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:48:08,241 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:48:08,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-03 03:48:08,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-03 03:48:08,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-03 03:48:08,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:48:08,846 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr80REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 631 more)] === [2021-11-03 03:48:08,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:48:08,847 INFO L85 PathProgramCache]: Analyzing trace with hash 688279333, now seen corresponding path program 1 times [2021-11-03 03:48:08,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:48:08,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255123667] [2021-11-03 03:48:08,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:48:08,848 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:48:08,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:48:08,848 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:48:08,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-03 03:48:09,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:48:09,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 03:48:09,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:48:10,225 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 03:48:10,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:48:11,557 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 03:48:11,558 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:48:11,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255123667] [2021-11-03 03:48:11,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255123667] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:48:11,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1451186072] [2021-11-03 03:48:11,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:48:11,558 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 03:48:11,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 03:48:11,559 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 03:48:11,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-03 03:48:12,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:48:12,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 03:48:12,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:48:12,911 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 03:48:12,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:48:13,144 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 03:48:13,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1451186072] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:48:13,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840990335] [2021-11-03 03:48:13,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:48:13,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:48:13,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:48:13,150 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:48:13,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-03 03:48:14,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:48:14,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 03:48:14,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:48:14,471 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 03:48:14,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:48:14,701 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 03:48:14,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840990335] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:48:14,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 03:48:14,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 18, 18] total 34 [2021-11-03 03:48:14,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052280994] [2021-11-03 03:48:14,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-03 03:48:14,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:48:14,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-03 03:48:14,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-11-03 03:48:14,704 INFO L87 Difference]: Start difference. First operand 1232 states and 1426 transitions. Second operand has 34 states, 34 states have (on average 3.0294117647058822) internal successors, (103), 34 states have internal predecessors, (103), 0 states have call successors, (0), 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 03:48:29,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:48:29,379 INFO L93 Difference]: Finished difference Result 2116 states and 2454 transitions. [2021-11-03 03:48:29,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-03 03:48:29,380 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.0294117647058822) internal successors, (103), 34 states have internal predecessors, (103), 0 states have call successors, (0), 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 85 [2021-11-03 03:48:29,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:48:29,384 INFO L225 Difference]: With dead ends: 2116 [2021-11-03 03:48:29,384 INFO L226 Difference]: Without dead ends: 2116 [2021-11-03 03:48:29,385 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1446, Invalid=2586, Unknown=0, NotChecked=0, Total=4032 [2021-11-03 03:48:29,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2116 states. [2021-11-03 03:48:29,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2116 to 1256. [2021-11-03 03:48:29,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 828 states have (on average 1.751207729468599) internal successors, (1450), 1255 states have internal predecessors, (1450), 0 states have call successors, (0), 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 03:48:29,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 1450 transitions. [2021-11-03 03:48:29,407 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 1450 transitions. Word has length 85 [2021-11-03 03:48:29,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:48:29,408 INFO L470 AbstractCegarLoop]: Abstraction has 1256 states and 1450 transitions. [2021-11-03 03:48:29,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.0294117647058822) internal successors, (103), 34 states have internal predecessors, (103), 0 states have call successors, (0), 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 03:48:29,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 1450 transitions. [2021-11-03 03:48:29,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-03 03:48:29,409 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:48:29,409 INFO L513 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:48:29,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-03 03:48:29,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-03 03:48:29,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-03 03:48:30,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 03:48:30,026 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr80REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 631 more)] === [2021-11-03 03:48:30,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:48:30,027 INFO L85 PathProgramCache]: Analyzing trace with hash -2300123, now seen corresponding path program 2 times [2021-11-03 03:48:30,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:48:30,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1535589857] [2021-11-03 03:48:30,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 03:48:30,028 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:48:30,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:48:30,029 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:48:30,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-03 03:48:31,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 03:48:31,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:48:31,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-03 03:48:31,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:48:33,178 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:48:33,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:48:38,238 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:48:38,239 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:48:38,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1535589857] [2021-11-03 03:48:38,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1535589857] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:48:38,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1996784311] [2021-11-03 03:48:38,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 03:48:38,240 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 03:48:38,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 03:48:38,241 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 03:48:38,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-03 03:48:40,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 03:48:40,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:48:40,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-03 03:48:40,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:48:40,713 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:48:40,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:48:41,064 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:48:41,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1996784311] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:48:41,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985533260] [2021-11-03 03:48:41,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 03:48:41,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:48:41,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:48:41,066 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:48:41,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e0a4ced-d01d-4400-9de0-a5e54ef13d30/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-03 03:49:12,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 03:49:12,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:49:12,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-03 03:49:12,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:49:13,157 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-03 03:49:13,157 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 15 treesize of output 15 [2021-11-03 03:49:13,307 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 18 treesize of output 14 [2021-11-03 03:49:14,162 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-03 03:49:14,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 33 treesize of output 26 [2021-11-03 03:49:14,484 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 03:49:14,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 03:49:14,848 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 03:49:14,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 03:49:15,207 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 03:49:15,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 03:49:15,555 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 03:49:15,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 03:49:15,910 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 03:49:15,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 03:49:16,255 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 03:49:16,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 03:49:16,627 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 03:49:16,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 03:49:16,978 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 03:49:16,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 03:49:17,342 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 03:49:17,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 03:49:17,692 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 03:49:17,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 03:49:19,326 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 03:49:19,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 03:49:19,675 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 03:49:19,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 03:49:20,024 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 03:49:20,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 03:49:20,387 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 03:49:20,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 03:49:21,952 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 03:49:21,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 03:49:22,252 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 03:49:22,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 03:49:22,561 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 03:49:22,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 03:49:28,084 WARN L207 SmtUtils]: Spent 5.23 s on a formula simplification. DAG size of input: 18 DAG size of output: 9 [2021-11-03 03:49:28,085 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 03:49:28,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 03:49:32,040 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 03:49:32,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 03:49:32,341 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 03:49:32,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 03:49:35,117 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 03:49:35,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 03:49:35,478 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 03:49:35,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 03:49:39,346 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 03:49:39,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 03:49:39,677 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 03:49:39,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 03:49:43,258 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 03:49:43,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 03:49:43,578 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 03:49:43,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 03:49:45,524 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 03:49:45,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 03:49:45,827 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 03:49:45,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-03 03:49:47,704 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-03 03:49:47,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 48 [2021-11-03 03:49:48,355 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-03 03:49:48,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 27 [2021-11-03 03:49:48,481 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 29 proven. 30 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2021-11-03 03:49:48,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:54:40,357 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr278| (_ BitVec 32)) (|v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr278_332| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base| (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base|) (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr278| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr278_332| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32))) c_ULTIMATE.start_main_~user~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset))))))) (_ bv1 1)))) is different from false [2021-11-03 03:55:36,602 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr278| (_ BitVec 32)) (|v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr278_340| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base| (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base|) (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr278| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr278_340| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32))) c_ULTIMATE.start_main_~user~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset)))))))))) (_ bv1 1)))) is different from false [2021-11-03 03:55:41,371 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr278| (_ BitVec 32)) (|v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr278_344| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base| (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base|) (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr278| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32)) (bvadd |v_ULTIMATE.start_#Ultimate.C_memset_#t~loopctr278_344| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) (_ bv0 32))) c_ULTIMATE.start_main_~user~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset)))))))) (_ bv1 1)))) is different from false