./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.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_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/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_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/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_ccff57d8-c6a2-48cd-88cb-e92f14055526/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 9a343b75818c5d561b79c31bb62e9abdd9bdb0bf3f01f7efa313d9ef0f4204f4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:51:47,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:51:47,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:51:47,268 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:51:47,272 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:51:47,273 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:51:47,275 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:51:47,277 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:51:47,280 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:51:47,281 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:51:47,282 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:51:47,284 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:51:47,285 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:51:47,286 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:51:47,291 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:51:47,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:51:47,296 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:51:47,302 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:51:47,306 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:51:47,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:51:47,318 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:51:47,320 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:51:47,323 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:51:47,324 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:51:47,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:51:47,336 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:51:47,337 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:51:47,339 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:51:47,339 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:51:47,341 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:51:47,341 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:51:47,342 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:51:47,344 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:51:47,346 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:51:47,347 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:51:47,347 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:51:47,348 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:51:47,348 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:51:47,349 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:51:47,349 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:51:47,350 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:51:47,351 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-03 04:51:47,398 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:51:47,398 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:51:47,399 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:51:47,399 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:51:47,400 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:51:47,400 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:51:47,400 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:51:47,400 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:51:47,401 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:51:47,401 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:51:47,402 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:51:47,402 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:51:47,402 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:51:47,402 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:51:47,403 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:51:47,403 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 04:51:47,404 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 04:51:47,404 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:51:47,404 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:51:47,404 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 04:51:47,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:51:47,405 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:51:47,405 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:51:47,405 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 04:51:47,405 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 04:51:47,405 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 04:51:47,406 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:51:47,406 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:51:47,406 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:51:47,406 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:51:47,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:51:47,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:51:47,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:51:47,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:51:47,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:51:47,408 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:51:47,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:51:47,408 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:51:47,408 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:51:47,409 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_ccff57d8-c6a2-48cd-88cb-e92f14055526/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a343b75818c5d561b79c31bb62e9abdd9bdb0bf3f01f7efa313d9ef0f4204f4 [2021-11-03 04:51:47,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:51:47,727 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:51:47,730 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:51:47,731 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:51:47,732 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:51:47,733 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i [2021-11-03 04:51:47,820 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/data/20199dc5f/08c51427c96444d98f17947dababccd2/FLAGd61e8994f [2021-11-03 04:51:48,499 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:51:48,501 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i [2021-11-03 04:51:48,526 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/data/20199dc5f/08c51427c96444d98f17947dababccd2/FLAGd61e8994f [2021-11-03 04:51:48,713 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/data/20199dc5f/08c51427c96444d98f17947dababccd2 [2021-11-03 04:51:48,715 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:51:48,717 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:51:48,718 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:51:48,719 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:51:48,722 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:51:48,723 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:51:48" (1/1) ... [2021-11-03 04:51:48,724 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53490485 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:48, skipping insertion in model container [2021-11-03 04:51:48,724 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:51:48" (1/1) ... [2021-11-03 04:51:48,731 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:51:48,796 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:51:49,266 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_ccff57d8-c6a2-48cd-88cb-e92f14055526/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i[33022,33035] [2021-11-03 04:51:49,517 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:51:49,542 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 04:51:49,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5d4f2c52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:49, skipping insertion in model container [2021-11-03 04:51:49,545 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:51:49,546 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:51:49,548 INFO L168 Benchmark]: Toolchain (without parser) took 829.93 ms. Allocated memory was 90.2 MB in the beginning and 119.5 MB in the end (delta: 29.4 MB). Free memory was 51.6 MB in the beginning and 75.8 MB in the end (delta: -24.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 04:51:49,550 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 90.2 MB. Free memory was 63.0 MB in the beginning and 62.9 MB in the end (delta: 21.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:51:49,552 INFO L168 Benchmark]: CACSL2BoogieTranslator took 827.34 ms. Allocated memory was 90.2 MB in the beginning and 119.5 MB in the end (delta: 29.4 MB). Free memory was 51.6 MB in the beginning and 75.8 MB in the end (delta: -24.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 04:51:49,555 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 90.2 MB. Free memory was 63.0 MB in the beginning and 62.9 MB in the end (delta: 21.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 827.34 ms. Allocated memory was 90.2 MB in the beginning and 119.5 MB in the end (delta: 29.4 MB). Free memory was 51.6 MB in the beginning and 75.8 MB in the end (delta: -24.2 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: 734]: 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_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/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_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/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_ccff57d8-c6a2-48cd-88cb-e92f14055526/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 9a343b75818c5d561b79c31bb62e9abdd9bdb0bf3f01f7efa313d9ef0f4204f4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:51:51,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:51:51,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:51:51,880 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:51:51,880 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:51:51,885 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:51:51,887 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:51:51,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:51:51,894 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:51:51,901 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:51:51,903 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:51:51,905 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:51:51,905 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:51:51,907 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:51:51,909 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:51:51,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:51:51,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:51:51,916 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:51:51,919 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:51:51,926 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:51:51,928 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:51:51,929 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:51:51,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:51:51,934 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:51:51,942 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:51:51,943 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:51:51,943 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:51:51,945 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:51:51,946 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:51:51,947 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:51:51,947 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:51:51,948 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:51:51,950 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:51:51,951 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:51:51,952 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:51:51,953 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:51:51,954 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:51:51,954 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:51:51,954 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:51:51,956 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:51:51,957 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:51:51,962 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-03 04:51:52,002 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:51:52,002 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:51:52,003 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:51:52,004 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:51:52,004 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:51:52,004 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:51:52,004 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:51:52,005 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:51:52,005 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:51:52,006 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 04:51:52,007 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 04:51:52,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:51:52,008 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:51:52,008 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 04:51:52,008 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:51:52,009 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:51:52,009 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:51:52,009 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 04:51:52,009 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 04:51:52,009 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 04:51:52,010 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:51:52,010 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:51:52,010 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:51:52,010 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:51:52,011 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:51:52,011 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:51:52,011 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:51:52,011 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:51:52,012 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:51:52,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:51:52,012 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:51:52,013 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:51:52,013 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:51:52,013 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:51:52,014 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:51:52,014 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:51:52,014 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_ccff57d8-c6a2-48cd-88cb-e92f14055526/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a343b75818c5d561b79c31bb62e9abdd9bdb0bf3f01f7efa313d9ef0f4204f4 [2021-11-03 04:51:52,400 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:51:52,421 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:51:52,424 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:51:52,425 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:51:52,426 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:51:52,427 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i [2021-11-03 04:51:52,491 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/data/96cc01a54/8111633513604a4c8336591c21bb64ff/FLAG4c950ae0b [2021-11-03 04:51:53,094 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:51:53,095 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i [2021-11-03 04:51:53,123 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/data/96cc01a54/8111633513604a4c8336591c21bb64ff/FLAG4c950ae0b [2021-11-03 04:51:53,316 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/data/96cc01a54/8111633513604a4c8336591c21bb64ff [2021-11-03 04:51:53,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:51:53,320 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:51:53,324 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:51:53,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:51:53,328 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:51:53,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:51:53" (1/1) ... [2021-11-03 04:51:53,330 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5eb9852b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:53, skipping insertion in model container [2021-11-03 04:51:53,331 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:51:53" (1/1) ... [2021-11-03 04:51:53,338 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:51:53,416 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:51:53,928 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_ccff57d8-c6a2-48cd-88cb-e92f14055526/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i[33022,33035] [2021-11-03 04:51:54,167 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:51:54,178 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:51:54,195 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:51:54,213 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_ccff57d8-c6a2-48cd-88cb-e92f14055526/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i[33022,33035] [2021-11-03 04:51:54,375 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:51:54,380 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:51:54,416 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_ccff57d8-c6a2-48cd-88cb-e92f14055526/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-2.i[33022,33035] [2021-11-03 04:51:54,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:51:54,566 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:51:54,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:54 WrapperNode [2021-11-03 04:51:54,567 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:51:54,568 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:51:54,569 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:51:54,569 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:51:54,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:54" (1/1) ... [2021-11-03 04:51:54,624 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:54" (1/1) ... [2021-11-03 04:51:54,743 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:51:54,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:51:54,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:51:54,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:51:54,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:54" (1/1) ... [2021-11-03 04:51:54,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:54" (1/1) ... [2021-11-03 04:51:54,768 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:54" (1/1) ... [2021-11-03 04:51:54,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:54" (1/1) ... [2021-11-03 04:51:54,909 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:54" (1/1) ... [2021-11-03 04:51:54,948 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:54" (1/1) ... [2021-11-03 04:51:54,967 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:54" (1/1) ... [2021-11-03 04:51:54,994 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:51:54,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:51:55,000 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:51:55,000 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:51:55,001 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:54" (1/1) ... [2021-11-03 04:51:55,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:51:55,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:51:55,033 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:51:55,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:51:55,080 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 04:51:55,080 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 04:51:55,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 04:51:55,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 04:51:55,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:51:55,081 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-03 04:51:55,081 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 04:51:55,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 04:51:55,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 04:51:55,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:51:55,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:51:55,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:52:05,519 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:52:05,519 INFO L299 CfgBuilder]: Removed 216 assume(true) statements. [2021-11-03 04:52:05,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:52:05 BoogieIcfgContainer [2021-11-03 04:52:05,525 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:52:05,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:52:05,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:52:05,530 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:52:05,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:51:53" (1/3) ... [2021-11-03 04:52:05,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ffb8d72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:52:05, skipping insertion in model container [2021-11-03 04:52:05,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:51:54" (2/3) ... [2021-11-03 04:52:05,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ffb8d72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:52:05, skipping insertion in model container [2021-11-03 04:52:05,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:52:05" (3/3) ... [2021-11-03 04:52:05,533 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test10-2.i [2021-11-03 04:52:05,538 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:52:05,539 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1110 error locations. [2021-11-03 04:52:05,583 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:52:05,589 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 04:52:05,589 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1110 error locations. [2021-11-03 04:52:05,657 INFO L276 IsEmpty]: Start isEmpty. Operand has 2322 states, 1211 states have (on average 2.199009083402147) internal successors, (2663), 2321 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states 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 04:52:05,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 04:52:05,662 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:05,663 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 04:52:05,663 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:52:05,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:05,669 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-11-03 04:52:05,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:05,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [897355389] [2021-11-03 04:52:05,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:05,679 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:05,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:05,680 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:05,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:52:05,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:05,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:52:05,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:05,993 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 04:52:06,004 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 04:52:06,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:06,025 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 04:52:06,026 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:06,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [897355389] [2021-11-03 04:52:06,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [897355389] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:06,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:06,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:52:06,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232899781] [2021-11-03 04:52:06,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:52:06,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:06,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:52:06,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:52:06,066 INFO L87 Difference]: Start difference. First operand has 2322 states, 1211 states have (on average 2.199009083402147) internal successors, (2663), 2321 states have internal predecessors, (2663), 0 states have call successors, (0), 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 04:52:10,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:10,765 INFO L93 Difference]: Finished difference Result 3006 states and 3198 transitions. [2021-11-03 04:52:10,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:52:10,767 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 04:52:10,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:10,799 INFO L225 Difference]: With dead ends: 3006 [2021-11-03 04:52:10,799 INFO L226 Difference]: Without dead ends: 3004 [2021-11-03 04:52:10,800 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 04:52:10,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3004 states. [2021-11-03 04:52:10,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3004 to 2470. [2021-11-03 04:52:10,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2470 states, 1383 states have (on average 2.0325379609544467) internal successors, (2811), 2469 states have internal predecessors, (2811), 0 states have call successors, (0), 0 states 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 04:52:10,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2470 states to 2470 states and 2811 transitions. [2021-11-03 04:52:10,936 INFO L78 Accepts]: Start accepts. Automaton has 2470 states and 2811 transitions. Word has length 3 [2021-11-03 04:52:10,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:10,936 INFO L470 AbstractCegarLoop]: Abstraction has 2470 states and 2811 transitions. [2021-11-03 04:52:10,936 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 04:52:10,937 INFO L276 IsEmpty]: Start isEmpty. Operand 2470 states and 2811 transitions. [2021-11-03 04:52:10,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 04:52:10,937 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:10,937 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 04:52:10,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:52:11,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:11,149 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:52:11,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:11,150 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-11-03 04:52:11,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:11,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1292754554] [2021-11-03 04:52:11,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:11,151 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:11,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:11,153 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:11,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:52:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:11,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:52:11,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:11,358 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 04:52:11,378 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 04:52:11,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:11,439 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 04:52:11,440 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:11,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1292754554] [2021-11-03 04:52:11,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1292754554] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:11,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:11,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 04:52:11,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082000337] [2021-11-03 04:52:11,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:52:11,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:11,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:52:11,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:52:11,444 INFO L87 Difference]: Start difference. First operand 2470 states and 2811 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 04:52:21,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:21,414 INFO L93 Difference]: Finished difference Result 3838 states and 4302 transitions. [2021-11-03 04:52:21,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:52:21,415 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 04:52:21,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:21,435 INFO L225 Difference]: With dead ends: 3838 [2021-11-03 04:52:21,436 INFO L226 Difference]: Without dead ends: 3838 [2021-11-03 04:52:21,436 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 04:52:21,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3838 states. [2021-11-03 04:52:21,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3838 to 2634. [2021-11-03 04:52:21,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2634 states, 1559 states have (on average 2.0224502886465685) internal successors, (3153), 2633 states have internal predecessors, (3153), 0 states have call successors, (0), 0 states 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 04:52:21,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2634 states to 2634 states and 3153 transitions. [2021-11-03 04:52:21,506 INFO L78 Accepts]: Start accepts. Automaton has 2634 states and 3153 transitions. Word has length 3 [2021-11-03 04:52:21,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:21,506 INFO L470 AbstractCegarLoop]: Abstraction has 2634 states and 3153 transitions. [2021-11-03 04:52:21,507 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 04:52:21,507 INFO L276 IsEmpty]: Start isEmpty. Operand 2634 states and 3153 transitions. [2021-11-03 04:52:21,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 04:52:21,508 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:21,508 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:52:21,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:52:21,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:21,719 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:52:21,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:21,720 INFO L85 PathProgramCache]: Analyzing trace with hash 62249618, now seen corresponding path program 1 times [2021-11-03 04:52:21,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:21,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586019683] [2021-11-03 04:52:21,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:21,721 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:21,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:21,722 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:21,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:52:21,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:21,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:52:21,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:21,896 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 04:52:21,910 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 04:52:21,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:21,934 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 04:52:21,934 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:21,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586019683] [2021-11-03 04:52:21,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586019683] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:21,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:21,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:52:21,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191644996] [2021-11-03 04:52:21,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:52:21,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:21,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:52:21,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:52:21,937 INFO L87 Difference]: Start difference. First operand 2634 states and 3153 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 04:52:25,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:25,532 INFO L93 Difference]: Finished difference Result 3440 states and 3971 transitions. [2021-11-03 04:52:25,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:52:25,532 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 04:52:25,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:25,549 INFO L225 Difference]: With dead ends: 3440 [2021-11-03 04:52:25,549 INFO L226 Difference]: Without dead ends: 3440 [2021-11-03 04:52:25,550 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 04:52:25,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3440 states. [2021-11-03 04:52:25,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3440 to 2543. [2021-11-03 04:52:25,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2543 states, 1559 states have (on average 1.9422706863373957) internal successors, (3028), 2542 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states 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 04:52:25,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2543 states to 2543 states and 3028 transitions. [2021-11-03 04:52:25,611 INFO L78 Accepts]: Start accepts. Automaton has 2543 states and 3028 transitions. Word has length 8 [2021-11-03 04:52:25,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:25,611 INFO L470 AbstractCegarLoop]: Abstraction has 2543 states and 3028 transitions. [2021-11-03 04:52:25,612 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 04:52:25,612 INFO L276 IsEmpty]: Start isEmpty. Operand 2543 states and 3028 transitions. [2021-11-03 04:52:25,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 04:52:25,612 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:25,613 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:52:25,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:52:25,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:25,825 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:52:25,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:25,828 INFO L85 PathProgramCache]: Analyzing trace with hash 62249619, now seen corresponding path program 1 times [2021-11-03 04:52:25,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:25,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1896730771] [2021-11-03 04:52:25,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:25,829 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:25,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:25,830 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:25,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:52:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:26,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:52:26,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:26,065 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 04:52:26,111 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 04:52:26,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:26,209 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 04:52:26,209 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:26,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1896730771] [2021-11-03 04:52:26,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1896730771] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:26,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:26,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 04:52:26,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210505344] [2021-11-03 04:52:26,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:52:26,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:26,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:52:26,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:52:26,211 INFO L87 Difference]: Start difference. First operand 2543 states and 3028 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 04:52:35,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:35,072 INFO L93 Difference]: Finished difference Result 3569 states and 4002 transitions. [2021-11-03 04:52:35,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:52:35,073 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 04:52:35,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:35,088 INFO L225 Difference]: With dead ends: 3569 [2021-11-03 04:52:35,089 INFO L226 Difference]: Without dead ends: 3569 [2021-11-03 04:52:35,089 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 04:52:35,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3569 states. [2021-11-03 04:52:35,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3569 to 2535. [2021-11-03 04:52:35,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2535 states, 1561 states have (on average 1.9269698910954516) internal successors, (3008), 2534 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states 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 04:52:35,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2535 states to 2535 states and 3008 transitions. [2021-11-03 04:52:35,146 INFO L78 Accepts]: Start accepts. Automaton has 2535 states and 3008 transitions. Word has length 8 [2021-11-03 04:52:35,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:35,147 INFO L470 AbstractCegarLoop]: Abstraction has 2535 states and 3008 transitions. [2021-11-03 04:52:35,147 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 04:52:35,147 INFO L276 IsEmpty]: Start isEmpty. Operand 2535 states and 3008 transitions. [2021-11-03 04:52:35,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-03 04:52:35,148 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:35,148 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:52:35,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:52:35,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:35,386 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr658REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:52:35,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:35,387 INFO L85 PathProgramCache]: Analyzing trace with hash 175289392, now seen corresponding path program 1 times [2021-11-03 04:52:35,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:35,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1876159900] [2021-11-03 04:52:35,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:35,388 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:35,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:35,389 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:35,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:52:35,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:35,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:52:35,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:35,615 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 04:52:35,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:35,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:52:35,655 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:35,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1876159900] [2021-11-03 04:52:35,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1876159900] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:35,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:35,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:52:35,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967813032] [2021-11-03 04:52:35,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:52:35,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:35,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:52:35,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:52:35,657 INFO L87 Difference]: Start difference. First operand 2535 states and 3008 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:35,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:35,726 INFO L93 Difference]: Finished difference Result 2493 states and 2965 transitions. [2021-11-03 04:52:35,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:52:35,727 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-03 04:52:35,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:35,741 INFO L225 Difference]: With dead ends: 2493 [2021-11-03 04:52:35,741 INFO L226 Difference]: Without dead ends: 2493 [2021-11-03 04:52:35,744 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:52:35,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2021-11-03 04:52:35,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 2493. [2021-11-03 04:52:35,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2493 states, 1543 states have (on average 1.9215813350615685) internal successors, (2965), 2492 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states 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 04:52:35,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2493 states to 2493 states and 2965 transitions. [2021-11-03 04:52:35,792 INFO L78 Accepts]: Start accepts. Automaton has 2493 states and 2965 transitions. Word has length 11 [2021-11-03 04:52:35,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:35,794 INFO L470 AbstractCegarLoop]: Abstraction has 2493 states and 2965 transitions. [2021-11-03 04:52:35,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:35,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2493 states and 2965 transitions. [2021-11-03 04:52:35,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 04:52:35,795 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:35,796 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:52:35,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:52:36,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:36,011 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr682REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:52:36,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:36,012 INFO L85 PathProgramCache]: Analyzing trace with hash 949435626, now seen corresponding path program 1 times [2021-11-03 04:52:36,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:36,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521360193] [2021-11-03 04:52:36,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:36,013 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:36,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:36,015 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:36,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 04:52:36,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:36,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:52:36,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:36,279 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 04:52:36,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:36,314 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 04:52:36,314 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:36,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521360193] [2021-11-03 04:52:36,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521360193] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:36,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:36,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:52:36,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425125477] [2021-11-03 04:52:36,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:52:36,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:36,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:52:36,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:52:36,318 INFO L87 Difference]: Start difference. First operand 2493 states and 2965 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:36,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:36,436 INFO L93 Difference]: Finished difference Result 2472 states and 2937 transitions. [2021-11-03 04:52:36,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:52:36,437 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-03 04:52:36,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:36,449 INFO L225 Difference]: With dead ends: 2472 [2021-11-03 04:52:36,449 INFO L226 Difference]: Without dead ends: 2472 [2021-11-03 04:52:36,449 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:52:36,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-11-03 04:52:36,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2471. [2021-11-03 04:52:36,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2471 states, 1535 states have (on average 1.9127035830618893) internal successors, (2936), 2470 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states 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 04:52:36,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 2936 transitions. [2021-11-03 04:52:36,499 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 2936 transitions. Word has length 13 [2021-11-03 04:52:36,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:36,500 INFO L470 AbstractCegarLoop]: Abstraction has 2471 states and 2936 transitions. [2021-11-03 04:52:36,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:36,500 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 2936 transitions. [2021-11-03 04:52:36,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-03 04:52:36,502 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:36,502 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 04:52:36,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:52:36,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:36,713 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr334REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:52:36,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:36,714 INFO L85 PathProgramCache]: Analyzing trace with hash 270217471, now seen corresponding path program 1 times [2021-11-03 04:52:36,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:36,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1247215158] [2021-11-03 04:52:36,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:36,715 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:36,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:36,716 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:36,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 04:52:36,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:36,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:52:36,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:37,023 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 04:52:37,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:37,062 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 04:52:37,062 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:37,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1247215158] [2021-11-03 04:52:37,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1247215158] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:37,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:37,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:52:37,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834296092] [2021-11-03 04:52:37,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:52:37,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:37,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:52:37,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:52:37,065 INFO L87 Difference]: Start difference. First operand 2471 states and 2936 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states 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 04:52:37,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:37,134 INFO L93 Difference]: Finished difference Result 3981 states and 4554 transitions. [2021-11-03 04:52:37,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:52:37,135 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 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 04:52:37,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:37,150 INFO L225 Difference]: With dead ends: 3981 [2021-11-03 04:52:37,150 INFO L226 Difference]: Without dead ends: 3981 [2021-11-03 04:52:37,151 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 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 04:52:37,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3981 states. [2021-11-03 04:52:37,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3981 to 2393. [2021-11-03 04:52:37,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2393 states, 1481 states have (on average 1.8953409858203916) internal successors, (2807), 2392 states have internal predecessors, (2807), 0 states have call successors, (0), 0 states 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 04:52:37,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2393 states to 2393 states and 2807 transitions. [2021-11-03 04:52:37,200 INFO L78 Accepts]: Start accepts. Automaton has 2393 states and 2807 transitions. Word has length 20 [2021-11-03 04:52:37,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:37,201 INFO L470 AbstractCegarLoop]: Abstraction has 2393 states and 2807 transitions. [2021-11-03 04:52:37,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states 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 04:52:37,201 INFO L276 IsEmpty]: Start isEmpty. Operand 2393 states and 2807 transitions. [2021-11-03 04:52:37,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-03 04:52:37,202 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:37,202 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 04:52:37,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:52:37,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:37,416 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:52:37,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:37,417 INFO L85 PathProgramCache]: Analyzing trace with hash -673839521, now seen corresponding path program 1 times [2021-11-03 04:52:37,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:37,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811739181] [2021-11-03 04:52:37,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:37,417 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:37,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:37,421 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:37,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:52:37,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:37,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:52:37,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:37,688 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 04:52:37,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:37,733 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 04:52:37,734 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:37,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811739181] [2021-11-03 04:52:37,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811739181] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:37,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:37,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:52:37,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878288259] [2021-11-03 04:52:37,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:52:37,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:37,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:52:37,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:52:37,736 INFO L87 Difference]: Start difference. First operand 2393 states and 2807 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states 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 04:52:37,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:37,793 INFO L93 Difference]: Finished difference Result 3904 states and 4477 transitions. [2021-11-03 04:52:37,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:52:37,794 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 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 04:52:37,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:37,815 INFO L225 Difference]: With dead ends: 3904 [2021-11-03 04:52:37,815 INFO L226 Difference]: Without dead ends: 3904 [2021-11-03 04:52:37,816 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 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 04:52:37,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3904 states. [2021-11-03 04:52:37,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3904 to 2351. [2021-11-03 04:52:37,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2351 states, 1463 states have (on average 1.8892686261107314) internal successors, (2764), 2350 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states 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 04:52:37,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2351 states to 2351 states and 2764 transitions. [2021-11-03 04:52:37,861 INFO L78 Accepts]: Start accepts. Automaton has 2351 states and 2764 transitions. Word has length 20 [2021-11-03 04:52:37,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:37,861 INFO L470 AbstractCegarLoop]: Abstraction has 2351 states and 2764 transitions. [2021-11-03 04:52:37,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states 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 04:52:37,862 INFO L276 IsEmpty]: Start isEmpty. Operand 2351 states and 2764 transitions. [2021-11-03 04:52:37,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-03 04:52:37,863 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:37,863 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:52:37,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:52:38,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:38,075 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr358REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:52:38,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:38,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1980977049, now seen corresponding path program 1 times [2021-11-03 04:52:38,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:38,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1357827690] [2021-11-03 04:52:38,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:38,076 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:38,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:38,077 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:38,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 04:52:38,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:38,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:52:38,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:38,377 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 04:52:38,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:38,431 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 04:52:38,432 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:38,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1357827690] [2021-11-03 04:52:38,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1357827690] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:38,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:38,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:52:38,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499268469] [2021-11-03 04:52:38,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:52:38,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:38,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:52:38,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:52:38,434 INFO L87 Difference]: Start difference. First operand 2351 states and 2764 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states 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 04:52:38,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:38,571 INFO L93 Difference]: Finished difference Result 3862 states and 4384 transitions. [2021-11-03 04:52:38,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:52:38,572 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 22 [2021-11-03 04:52:38,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:38,584 INFO L225 Difference]: With dead ends: 3862 [2021-11-03 04:52:38,584 INFO L226 Difference]: Without dead ends: 3862 [2021-11-03 04:52:38,584 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 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 04:52:38,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2021-11-03 04:52:38,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 2313. [2021-11-03 04:52:38,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 1439 states have (on average 1.8603196664350243) internal successors, (2677), 2312 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states 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 04:52:38,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 2677 transitions. [2021-11-03 04:52:38,631 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 2677 transitions. Word has length 22 [2021-11-03 04:52:38,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:38,632 INFO L470 AbstractCegarLoop]: Abstraction has 2313 states and 2677 transitions. [2021-11-03 04:52:38,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states 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 04:52:38,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 2677 transitions. [2021-11-03 04:52:38,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-03 04:52:38,633 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:38,633 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] [2021-11-03 04:52:38,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:52:38,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:38,845 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:52:38,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:38,846 INFO L85 PathProgramCache]: Analyzing trace with hash 980278297, now seen corresponding path program 1 times [2021-11-03 04:52:38,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:38,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1544958460] [2021-11-03 04:52:38,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:38,846 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:38,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:38,847 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:38,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 04:52:39,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:39,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:52:39,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:39,170 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 04:52:39,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:39,225 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 04:52:39,225 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:39,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1544958460] [2021-11-03 04:52:39,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1544958460] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:39,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:39,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:52:39,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764695795] [2021-11-03 04:52:39,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:52:39,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:39,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:52:39,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:52:39,229 INFO L87 Difference]: Start difference. First operand 2313 states and 2677 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states 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 04:52:39,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:39,343 INFO L93 Difference]: Finished difference Result 3823 states and 4333 transitions. [2021-11-03 04:52:39,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:52:39,344 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 22 [2021-11-03 04:52:39,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:39,360 INFO L225 Difference]: With dead ends: 3823 [2021-11-03 04:52:39,361 INFO L226 Difference]: Without dead ends: 3823 [2021-11-03 04:52:39,361 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 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 04:52:39,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3823 states. [2021-11-03 04:52:39,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3823 to 2291. [2021-11-03 04:52:39,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 1431 states have (on average 1.8504542278127183) internal successors, (2648), 2290 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states 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 04:52:39,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 2648 transitions. [2021-11-03 04:52:39,426 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 2648 transitions. Word has length 22 [2021-11-03 04:52:39,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:39,426 INFO L470 AbstractCegarLoop]: Abstraction has 2291 states and 2648 transitions. [2021-11-03 04:52:39,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states 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 04:52:39,427 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 2648 transitions. [2021-11-03 04:52:39,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 04:52:39,430 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:39,430 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:52:39,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:52:39,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:39,647 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr696REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:52:39,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:39,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1893283832, now seen corresponding path program 1 times [2021-11-03 04:52:39,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:39,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320309221] [2021-11-03 04:52:39,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:39,649 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:39,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:39,650 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:39,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:52:39,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:39,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:52:39,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:39,874 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 04:52:40,011 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 04:52:40,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:40,122 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 04:52:40,123 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:40,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320309221] [2021-11-03 04:52:40,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [320309221] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:40,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:40,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:52:40,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127973444] [2021-11-03 04:52:40,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:52:40,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:40,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:52:40,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:52:40,125 INFO L87 Difference]: Start difference. First operand 2291 states and 2648 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:43,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:43,597 INFO L93 Difference]: Finished difference Result 2746 states and 3014 transitions. [2021-11-03 04:52:43,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:52:43,597 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-03 04:52:43,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:43,605 INFO L225 Difference]: With dead ends: 2746 [2021-11-03 04:52:43,605 INFO L226 Difference]: Without dead ends: 2746 [2021-11-03 04:52:43,605 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 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 04:52:43,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2021-11-03 04:52:43,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 2287. [2021-11-03 04:52:43,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 1431 states have (on average 1.8476589797344514) internal successors, (2644), 2286 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states 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 04:52:43,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 2644 transitions. [2021-11-03 04:52:43,638 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 2644 transitions. Word has length 27 [2021-11-03 04:52:43,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:43,639 INFO L470 AbstractCegarLoop]: Abstraction has 2287 states and 2644 transitions. [2021-11-03 04:52:43,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:43,639 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 2644 transitions. [2021-11-03 04:52:43,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 04:52:43,640 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:43,640 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:52:43,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:52:43,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:43,852 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr697REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:52:43,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:43,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1893283833, now seen corresponding path program 1 times [2021-11-03 04:52:43,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:43,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793040366] [2021-11-03 04:52:43,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:43,853 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:43,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:43,854 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:43,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 04:52:44,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:44,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:52:44,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:44,115 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 04:52:44,390 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 04:52:44,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:44,831 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 04:52:44,831 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:44,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793040366] [2021-11-03 04:52:44,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1793040366] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:44,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:44,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:52:44,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552885910] [2021-11-03 04:52:44,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:52:44,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:44,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:52:44,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:52:44,834 INFO L87 Difference]: Start difference. First operand 2287 states and 2644 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:55,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:52:55,369 INFO L93 Difference]: Finished difference Result 3352 states and 3707 transitions. [2021-11-03 04:52:55,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:52:55,370 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-03 04:52:55,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:52:55,375 INFO L225 Difference]: With dead ends: 3352 [2021-11-03 04:52:55,376 INFO L226 Difference]: Without dead ends: 3352 [2021-11-03 04:52:55,376 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 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 04:52:55,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3352 states. [2021-11-03 04:52:55,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3352 to 2320. [2021-11-03 04:52:55,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 1465 states have (on average 1.8300341296928329) internal successors, (2681), 2319 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states 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 04:52:55,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 2681 transitions. [2021-11-03 04:52:55,413 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 2681 transitions. Word has length 27 [2021-11-03 04:52:55,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:52:55,413 INFO L470 AbstractCegarLoop]: Abstraction has 2320 states and 2681 transitions. [2021-11-03 04:52:55,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:52:55,414 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 2681 transitions. [2021-11-03 04:52:55,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 04:52:55,415 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:52:55,415 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] [2021-11-03 04:52:55,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:52:55,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:52:55,627 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr372REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:52:55,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:52:55,627 INFO L85 PathProgramCache]: Analyzing trace with hash 187122631, now seen corresponding path program 1 times [2021-11-03 04:52:55,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:52:55,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [414981656] [2021-11-03 04:52:55,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:52:55,630 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:52:55,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:52:55,631 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:52:55,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 04:52:55,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:52:55,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:52:55,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:52:55,927 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 04:52:56,077 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 04:52:56,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:52:56,226 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 04:52:56,226 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:52:56,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [414981656] [2021-11-03 04:52:56,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [414981656] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:52:56,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:52:56,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:52:56,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702969544] [2021-11-03 04:52:56,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:52:56,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:52:56,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:52:56,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:52:56,228 INFO L87 Difference]: Start difference. First operand 2320 states and 2681 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 04:53:02,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:53:02,383 INFO L93 Difference]: Finished difference Result 4930 states and 5526 transitions. [2021-11-03 04:53:02,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:53:02,383 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-11-03 04:53:02,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:53:02,392 INFO L225 Difference]: With dead ends: 4930 [2021-11-03 04:53:02,392 INFO L226 Difference]: Without dead ends: 4930 [2021-11-03 04:53:02,392 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 67 SyntacticMatches, 2 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 04:53:02,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4930 states. [2021-11-03 04:53:02,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4930 to 2317. [2021-11-03 04:53:02,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 1465 states have (on average 1.8225255972696246) internal successors, (2670), 2316 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states 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 04:53:02,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 2670 transitions. [2021-11-03 04:53:02,434 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 2670 transitions. Word has length 36 [2021-11-03 04:53:02,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:53:02,434 INFO L470 AbstractCegarLoop]: Abstraction has 2317 states and 2670 transitions. [2021-11-03 04:53:02,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 04:53:02,435 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 2670 transitions. [2021-11-03 04:53:02,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 04:53:02,436 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:53:02,436 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] [2021-11-03 04:53:02,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 04:53:02,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:53:02,648 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr373REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:53:02,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:53:02,649 INFO L85 PathProgramCache]: Analyzing trace with hash 187122632, now seen corresponding path program 1 times [2021-11-03 04:53:02,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:53:02,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1327652367] [2021-11-03 04:53:02,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:53:02,652 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:53:02,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:53:02,653 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:53:02,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 04:53:02,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:53:02,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:53:02,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:53:03,016 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 04:53:03,350 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 04:53:03,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:53:03,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:53:03,870 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:53:03,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1327652367] [2021-11-03 04:53:03,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1327652367] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:53:03,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:53:03,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:53:03,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663049803] [2021-11-03 04:53:03,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:53:03,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:53:03,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:53:03,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:53:03,872 INFO L87 Difference]: Start difference. First operand 2317 states and 2670 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:53:21,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:53:21,026 INFO L93 Difference]: Finished difference Result 4863 states and 5399 transitions. [2021-11-03 04:53:21,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:53:21,027 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-03 04:53:21,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:53:21,035 INFO L225 Difference]: With dead ends: 4863 [2021-11-03 04:53:21,035 INFO L226 Difference]: Without dead ends: 4863 [2021-11-03 04:53:21,035 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 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 04:53:21,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4863 states. [2021-11-03 04:53:21,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4863 to 2317. [2021-11-03 04:53:21,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 1465 states have (on average 1.8197952218430034) internal successors, (2666), 2316 states have internal predecessors, (2666), 0 states have call successors, (0), 0 states 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 04:53:21,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 2666 transitions. [2021-11-03 04:53:21,076 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 2666 transitions. Word has length 36 [2021-11-03 04:53:21,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:53:21,076 INFO L470 AbstractCegarLoop]: Abstraction has 2317 states and 2666 transitions. [2021-11-03 04:53:21,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:53:21,077 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 2666 transitions. [2021-11-03 04:53:21,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 04:53:21,077 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:53:21,078 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] [2021-11-03 04:53:21,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 04:53:21,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:53:21,290 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:53:21,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:53:21,290 INFO L85 PathProgramCache]: Analyzing trace with hash -773066201, now seen corresponding path program 1 times [2021-11-03 04:53:21,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:53:21,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [925707017] [2021-11-03 04:53:21,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:53:21,291 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:53:21,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:53:21,292 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:53:21,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:53:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:53:21,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:53:21,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:53:21,618 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 04:53:21,802 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 04:53:21,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:53:21,924 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 04:53:21,924 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:53:21,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [925707017] [2021-11-03 04:53:21,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [925707017] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:53:21,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:53:21,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:53:21,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090038870] [2021-11-03 04:53:21,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:53:21,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:53:21,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:53:21,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:53:21,926 INFO L87 Difference]: Start difference. First operand 2317 states and 2666 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 04:53:27,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:53:27,522 INFO L93 Difference]: Finished difference Result 4534 states and 5106 transitions. [2021-11-03 04:53:27,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:53:27,523 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-11-03 04:53:27,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:53:27,526 INFO L225 Difference]: With dead ends: 4534 [2021-11-03 04:53:27,526 INFO L226 Difference]: Without dead ends: 4534 [2021-11-03 04:53:27,526 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 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 04:53:27,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4534 states. [2021-11-03 04:53:27,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4534 to 2313. [2021-11-03 04:53:27,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 1465 states have (on average 1.8170648464163823) internal successors, (2662), 2312 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states 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 04:53:27,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 2662 transitions. [2021-11-03 04:53:27,556 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 2662 transitions. Word has length 36 [2021-11-03 04:53:27,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:53:27,556 INFO L470 AbstractCegarLoop]: Abstraction has 2313 states and 2662 transitions. [2021-11-03 04:53:27,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 04:53:27,557 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 2662 transitions. [2021-11-03 04:53:27,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 04:53:27,557 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:53:27,558 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] [2021-11-03 04:53:27,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 04:53:27,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:53:27,770 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr55REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:53:27,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:53:27,771 INFO L85 PathProgramCache]: Analyzing trace with hash -773066200, now seen corresponding path program 1 times [2021-11-03 04:53:27,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:53:27,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772676321] [2021-11-03 04:53:27,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:53:27,771 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:53:27,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:53:27,772 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:53:27,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 04:53:28,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:53:28,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:53:28,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:53:28,177 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 04:53:28,474 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 04:53:28,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:53:28,933 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 04:53:28,934 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:53:28,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1772676321] [2021-11-03 04:53:28,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1772676321] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:53:28,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:53:28,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:53:28,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336566489] [2021-11-03 04:53:28,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:53:28,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:53:28,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:53:28,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:53:28,936 INFO L87 Difference]: Start difference. First operand 2313 states and 2662 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:53:43,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:53:43,462 INFO L93 Difference]: Finished difference Result 4430 states and 4882 transitions. [2021-11-03 04:53:43,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:53:43,463 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-03 04:53:43,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:53:43,466 INFO L225 Difference]: With dead ends: 4430 [2021-11-03 04:53:43,466 INFO L226 Difference]: Without dead ends: 4430 [2021-11-03 04:53:43,466 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 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 04:53:43,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4430 states. [2021-11-03 04:53:43,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4430 to 2309. [2021-11-03 04:53:43,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2309 states, 1465 states have (on average 1.814334470989761) internal successors, (2658), 2308 states have internal predecessors, (2658), 0 states have call successors, (0), 0 states 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 04:53:43,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 2658 transitions. [2021-11-03 04:53:43,497 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 2658 transitions. Word has length 36 [2021-11-03 04:53:43,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:53:43,497 INFO L470 AbstractCegarLoop]: Abstraction has 2309 states and 2658 transitions. [2021-11-03 04:53:43,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:53:43,498 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 2658 transitions. [2021-11-03 04:53:43,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-03 04:53:43,498 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:53:43,499 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] [2021-11-03 04:53:43,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 04:53:43,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:53:43,711 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:53:43,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:53:43,711 INFO L85 PathProgramCache]: Analyzing trace with hash -480226171, now seen corresponding path program 1 times [2021-11-03 04:53:43,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:53:43,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1693810221] [2021-11-03 04:53:43,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:53:43,712 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:53:43,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:53:43,713 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:53:43,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 04:53:44,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:53:44,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:53:44,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:53:44,177 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 04:53:44,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:53:44,284 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 04:53:44,284 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:53:44,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1693810221] [2021-11-03 04:53:44,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1693810221] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:53:44,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:53:44,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:53:44,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2401827] [2021-11-03 04:53:44,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:53:44,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:53:44,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:53:44,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:53:44,286 INFO L87 Difference]: Start difference. First operand 2309 states and 2658 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states 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 04:53:44,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:53:44,342 INFO L93 Difference]: Finished difference Result 2303 states and 2644 transitions. [2021-11-03 04:53:44,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:53:44,342 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-11-03 04:53:44,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:53:44,345 INFO L225 Difference]: With dead ends: 2303 [2021-11-03 04:53:44,345 INFO L226 Difference]: Without dead ends: 2303 [2021-11-03 04:53:44,346 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 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 04:53:44,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2021-11-03 04:53:44,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 2303. [2021-11-03 04:53:44,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 1459 states have (on average 1.812200137080192) internal successors, (2644), 2302 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states 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 04:53:44,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 2644 transitions. [2021-11-03 04:53:44,373 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 2644 transitions. Word has length 40 [2021-11-03 04:53:44,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:53:44,373 INFO L470 AbstractCegarLoop]: Abstraction has 2303 states and 2644 transitions. [2021-11-03 04:53:44,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states 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 04:53:44,374 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 2644 transitions. [2021-11-03 04:53:44,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-03 04:53:44,374 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:53:44,375 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:53:44,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-03 04:53:44,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:53:44,587 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:53:44,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:53:44,587 INFO L85 PathProgramCache]: Analyzing trace with hash -952585927, now seen corresponding path program 1 times [2021-11-03 04:53:44,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:53:44,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1370722250] [2021-11-03 04:53:44,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:53:44,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:53:44,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:53:44,589 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:53:44,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 04:53:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:53:45,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:53:45,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:53:45,375 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 04:53:45,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:53:45,728 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 04:53:45,728 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:53:45,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1370722250] [2021-11-03 04:53:45,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1370722250] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:53:45,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:53:45,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:53:45,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008898514] [2021-11-03 04:53:45,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:53:45,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:53:45,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:53:45,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:53:45,730 INFO L87 Difference]: Start difference. First operand 2303 states and 2644 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states 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 04:53:46,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:53:46,031 INFO L93 Difference]: Finished difference Result 3720 states and 4199 transitions. [2021-11-03 04:53:46,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:53:46,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-03 04:53:46,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:53:46,034 INFO L225 Difference]: With dead ends: 3720 [2021-11-03 04:53:46,034 INFO L226 Difference]: Without dead ends: 3720 [2021-11-03 04:53:46,035 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 93 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 04:53:46,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3720 states. [2021-11-03 04:53:46,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3720 to 3067. [2021-11-03 04:53:46,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3067 states, 2223 states have (on average 1.789923526765632) internal successors, (3979), 3066 states have internal predecessors, (3979), 0 states have call successors, (0), 0 states 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 04:53:46,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3067 states to 3067 states and 3979 transitions. [2021-11-03 04:53:46,074 INFO L78 Accepts]: Start accepts. Automaton has 3067 states and 3979 transitions. Word has length 48 [2021-11-03 04:53:46,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:53:46,074 INFO L470 AbstractCegarLoop]: Abstraction has 3067 states and 3979 transitions. [2021-11-03 04:53:46,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states 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 04:53:46,075 INFO L276 IsEmpty]: Start isEmpty. Operand 3067 states and 3979 transitions. [2021-11-03 04:53:46,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-03 04:53:46,075 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:53:46,076 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:53:46,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 04:53:46,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:53:46,288 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:53:46,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:53:46,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1775606781, now seen corresponding path program 1 times [2021-11-03 04:53:46,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:53:46,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [284683043] [2021-11-03 04:53:46,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:53:46,289 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:53:46,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:53:46,290 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:53:46,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 04:53:46,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:53:46,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:53:46,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:53:46,879 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 04:53:46,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:53:46,981 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 04:53:46,981 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:53:46,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [284683043] [2021-11-03 04:53:46,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [284683043] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:53:46,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:53:46,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:53:46,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728360938] [2021-11-03 04:53:46,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:53:46,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:53:46,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:53:46,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:53:46,983 INFO L87 Difference]: Start difference. First operand 3067 states and 3979 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states 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 04:53:47,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:53:47,046 INFO L93 Difference]: Finished difference Result 4294 states and 5284 transitions. [2021-11-03 04:53:47,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:53:47,047 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-03 04:53:47,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:53:47,051 INFO L225 Difference]: With dead ends: 4294 [2021-11-03 04:53:47,051 INFO L226 Difference]: Without dead ends: 4294 [2021-11-03 04:53:47,051 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 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 04:53:47,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2021-11-03 04:53:47,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 3043. [2021-11-03 04:53:47,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3043 states, 2199 states have (on average 1.791268758526603) internal successors, (3939), 3042 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states 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 04:53:47,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3043 states to 3043 states and 3939 transitions. [2021-11-03 04:53:47,089 INFO L78 Accepts]: Start accepts. Automaton has 3043 states and 3939 transitions. Word has length 51 [2021-11-03 04:53:47,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:53:47,090 INFO L470 AbstractCegarLoop]: Abstraction has 3043 states and 3939 transitions. [2021-11-03 04:53:47,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states 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 04:53:47,090 INFO L276 IsEmpty]: Start isEmpty. Operand 3043 states and 3939 transitions. [2021-11-03 04:53:47,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-03 04:53:47,091 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:53:47,091 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:53:47,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 04:53:47,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:53:47,304 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:53:47,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:53:47,304 INFO L85 PathProgramCache]: Analyzing trace with hash 732181606, now seen corresponding path program 1 times [2021-11-03 04:53:47,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:53:47,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [193041894] [2021-11-03 04:53:47,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:53:47,305 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:53:47,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:53:47,306 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:53:47,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 04:53:47,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:53:47,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:53:47,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:53:48,024 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 04:53:48,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:53:48,168 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 04:53:48,168 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:53:48,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [193041894] [2021-11-03 04:53:48,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [193041894] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:53:48,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:53:48,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:53:48,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680404609] [2021-11-03 04:53:48,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:53:48,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:53:48,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:53:48,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:53:48,171 INFO L87 Difference]: Start difference. First operand 3043 states and 3939 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:53:48,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:53:48,252 INFO L93 Difference]: Finished difference Result 4030 states and 4773 transitions. [2021-11-03 04:53:48,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:53:48,252 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-03 04:53:48,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:53:48,257 INFO L225 Difference]: With dead ends: 4030 [2021-11-03 04:53:48,257 INFO L226 Difference]: Without dead ends: 4030 [2021-11-03 04:53:48,258 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 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 04:53:48,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4030 states. [2021-11-03 04:53:48,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4030 to 3031. [2021-11-03 04:53:48,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3031 states, 2187 states have (on average 1.791952446273434) internal successors, (3919), 3030 states have internal predecessors, (3919), 0 states have call successors, (0), 0 states 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 04:53:48,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3031 states to 3031 states and 3919 transitions. [2021-11-03 04:53:48,313 INFO L78 Accepts]: Start accepts. Automaton has 3031 states and 3919 transitions. Word has length 54 [2021-11-03 04:53:48,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:53:48,313 INFO L470 AbstractCegarLoop]: Abstraction has 3031 states and 3919 transitions. [2021-11-03 04:53:48,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:53:48,314 INFO L276 IsEmpty]: Start isEmpty. Operand 3031 states and 3919 transitions. [2021-11-03 04:53:48,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-03 04:53:48,314 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:53:48,315 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:53:48,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-03 04:53:48,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:53:48,529 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr740ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:53:48,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:53:48,529 INFO L85 PathProgramCache]: Analyzing trace with hash -993308447, now seen corresponding path program 1 times [2021-11-03 04:53:48,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:53:48,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2042654565] [2021-11-03 04:53:48,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:53:48,530 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:53:48,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:53:48,531 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:53:48,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 04:53:49,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:53:49,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:53:49,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:53:49,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:53:49,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:53:49,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:53:49,166 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-03 04:53:49,166 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 04:53:49,224 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-03 04:53:49,224 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 04:53:49,331 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 04:53:49,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:53:49,479 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 04:53:49,479 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:53:49,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2042654565] [2021-11-03 04:53:49,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2042654565] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:53:49,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:53:49,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:53:49,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578461060] [2021-11-03 04:53:49,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:53:49,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:53:49,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:53:49,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:53:49,481 INFO L87 Difference]: Start difference. First operand 3031 states and 3919 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:53:51,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:53:51,300 INFO L93 Difference]: Finished difference Result 3136 states and 4030 transitions. [2021-11-03 04:53:51,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:53:51,301 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-03 04:53:51,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:53:51,303 INFO L225 Difference]: With dead ends: 3136 [2021-11-03 04:53:51,303 INFO L226 Difference]: Without dead ends: 3136 [2021-11-03 04:53:51,304 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 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 04:53:51,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3136 states. [2021-11-03 04:53:51,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3136 to 2997. [2021-11-03 04:53:51,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2997 states, 2153 states have (on average 1.8039944263817929) internal successors, (3884), 2996 states have internal predecessors, (3884), 0 states have call successors, (0), 0 states 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 04:53:51,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2997 states to 2997 states and 3884 transitions. [2021-11-03 04:53:51,339 INFO L78 Accepts]: Start accepts. Automaton has 2997 states and 3884 transitions. Word has length 54 [2021-11-03 04:53:51,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:53:51,340 INFO L470 AbstractCegarLoop]: Abstraction has 2997 states and 3884 transitions. [2021-11-03 04:53:51,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:53:51,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2997 states and 3884 transitions. [2021-11-03 04:53:51,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 04:53:51,341 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:53:51,341 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:53:51,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-03 04:53:51,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:53:51,556 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:53:51,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:53:51,556 INFO L85 PathProgramCache]: Analyzing trace with hash -637866953, now seen corresponding path program 1 times [2021-11-03 04:53:51,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:53:51,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449108594] [2021-11-03 04:53:51,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:53:51,557 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:53:51,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:53:51,557 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:53:51,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 04:53:52,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:53:52,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:53:52,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:53:52,506 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 04:53:52,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:53:52,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:53:52,955 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:53:52,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1449108594] [2021-11-03 04:53:52,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1449108594] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:53:52,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:53:52,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:53:52,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600544488] [2021-11-03 04:53:52,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:53:52,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:53:52,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:53:52,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:53:52,957 INFO L87 Difference]: Start difference. First operand 2997 states and 3884 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:53:53,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:53:53,141 INFO L93 Difference]: Finished difference Result 4348 states and 5450 transitions. [2021-11-03 04:53:53,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:53:53,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-03 04:53:53,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:53:53,147 INFO L225 Difference]: With dead ends: 4348 [2021-11-03 04:53:53,148 INFO L226 Difference]: Without dead ends: 4348 [2021-11-03 04:53:53,149 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 115 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 04:53:53,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4348 states. [2021-11-03 04:53:53,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4348 to 3765. [2021-11-03 04:53:53,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3765 states, 2921 states have (on average 1.7740499828825744) internal successors, (5182), 3764 states have internal predecessors, (5182), 0 states have call successors, (0), 0 states 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 04:53:53,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3765 states to 3765 states and 5182 transitions. [2021-11-03 04:53:53,198 INFO L78 Accepts]: Start accepts. Automaton has 3765 states and 5182 transitions. Word has length 59 [2021-11-03 04:53:53,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:53:53,198 INFO L470 AbstractCegarLoop]: Abstraction has 3765 states and 5182 transitions. [2021-11-03 04:53:53,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:53:53,198 INFO L276 IsEmpty]: Start isEmpty. Operand 3765 states and 5182 transitions. [2021-11-03 04:53:53,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-03 04:53:53,199 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:53:53,199 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] [2021-11-03 04:53:53,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-03 04:53:53,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:53:53,417 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr391REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:53:53,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:53:53,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1882812110, now seen corresponding path program 1 times [2021-11-03 04:53:53,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:53:53,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428426935] [2021-11-03 04:53:53,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:53:53,418 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:53:53,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:53:53,419 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:53:53,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-03 04:53:54,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:53:54,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:53:54,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:53:54,145 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 04:53:54,153 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 04:53:54,878 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-03 04:53:54,879 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 29 treesize of output 31 [2021-11-03 04:53:54,885 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-03 04:53:54,885 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 28 treesize of output 24 [2021-11-03 04:53:54,929 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 04:53:54,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:53:59,893 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 04:53:59,893 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:53:59,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428426935] [2021-11-03 04:53:59,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1428426935] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:53:59,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:53:59,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:53:59,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559602697] [2021-11-03 04:53:59,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:53:59,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:53:59,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:53:59,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-03 04:53:59,896 INFO L87 Difference]: Start difference. First operand 3765 states and 5182 transitions. Second operand has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 04:54:27,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:54:27,819 INFO L93 Difference]: Finished difference Result 6990 states and 9595 transitions. [2021-11-03 04:54:27,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:54:27,820 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 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 62 [2021-11-03 04:54:27,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:54:27,826 INFO L225 Difference]: With dead ends: 6990 [2021-11-03 04:54:27,826 INFO L226 Difference]: Without dead ends: 6990 [2021-11-03 04:54:27,827 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=26, Invalid=28, Unknown=2, NotChecked=0, Total=56 [2021-11-03 04:54:27,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6990 states. [2021-11-03 04:54:27,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6990 to 3709. [2021-11-03 04:54:27,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3709 states, 2929 states have (on average 1.7214066234209628) internal successors, (5042), 3708 states have internal predecessors, (5042), 0 states have call successors, (0), 0 states 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 04:54:27,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3709 states to 3709 states and 5042 transitions. [2021-11-03 04:54:27,875 INFO L78 Accepts]: Start accepts. Automaton has 3709 states and 5042 transitions. Word has length 62 [2021-11-03 04:54:27,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:54:27,876 INFO L470 AbstractCegarLoop]: Abstraction has 3709 states and 5042 transitions. [2021-11-03 04:54:27,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 04:54:27,876 INFO L276 IsEmpty]: Start isEmpty. Operand 3709 states and 5042 transitions. [2021-11-03 04:54:27,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-03 04:54:27,877 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:54:27,877 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:54:27,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-03 04:54:28,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:54:28,092 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr396ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:54:28,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:54:28,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1203198829, now seen corresponding path program 1 times [2021-11-03 04:54:28,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:54:28,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1439552281] [2021-11-03 04:54:28,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:54:28,093 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:54:28,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:54:28,094 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:54:28,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-03 04:54:28,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:54:28,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:54:28,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:54:28,922 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 04:54:28,938 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 04:54:28,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-03 04:54:29,011 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 04:54:29,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:54:29,155 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 04:54:29,156 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:54:29,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1439552281] [2021-11-03 04:54:29,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1439552281] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:54:29,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:54:29,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 04:54:29,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368120382] [2021-11-03 04:54:29,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:54:29,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:54:29,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:54:29,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:54:29,158 INFO L87 Difference]: Start difference. First operand 3709 states and 5042 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:38,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:54:38,102 INFO L93 Difference]: Finished difference Result 6077 states and 8227 transitions. [2021-11-03 04:54:38,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 04:54:38,102 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-03 04:54:38,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:54:38,106 INFO L225 Difference]: With dead ends: 6077 [2021-11-03 04:54:38,106 INFO L226 Difference]: Without dead ends: 6077 [2021-11-03 04:54:38,107 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 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 04:54:38,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6077 states. [2021-11-03 04:54:38,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6077 to 3708. [2021-11-03 04:54:38,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3708 states, 2929 states have (on average 1.7203823830658929) internal successors, (5039), 3707 states have internal predecessors, (5039), 0 states have call successors, (0), 0 states 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 04:54:38,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3708 states to 3708 states and 5039 transitions. [2021-11-03 04:54:38,165 INFO L78 Accepts]: Start accepts. Automaton has 3708 states and 5039 transitions. Word has length 68 [2021-11-03 04:54:38,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:54:38,165 INFO L470 AbstractCegarLoop]: Abstraction has 3708 states and 5039 transitions. [2021-11-03 04:54:38,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:38,165 INFO L276 IsEmpty]: Start isEmpty. Operand 3708 states and 5039 transitions. [2021-11-03 04:54:38,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-03 04:54:38,166 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:54:38,167 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:54:38,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-03 04:54:38,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:54:38,380 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr78ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:54:38,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:54:38,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1028979469, now seen corresponding path program 1 times [2021-11-03 04:54:38,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:54:38,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [912952972] [2021-11-03 04:54:38,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:54:38,381 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:54:38,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:54:38,382 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:54:38,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-03 04:54:39,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:54:39,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:54:39,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:54:39,225 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 04:54:39,243 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 04:54:39,288 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 04:54:39,324 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 04:54:39,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:54:39,482 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 04:54:39,482 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:54:39,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [912952972] [2021-11-03 04:54:39,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [912952972] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:54:39,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:54:39,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 04:54:39,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224111517] [2021-11-03 04:54:39,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:54:39,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:54:39,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:54:39,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:54:39,484 INFO L87 Difference]: Start difference. First operand 3708 states and 5039 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:48,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:54:48,412 INFO L93 Difference]: Finished difference Result 6069 states and 8213 transitions. [2021-11-03 04:54:48,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 04:54:48,412 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-03 04:54:48,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:54:48,419 INFO L225 Difference]: With dead ends: 6069 [2021-11-03 04:54:48,419 INFO L226 Difference]: Without dead ends: 6069 [2021-11-03 04:54:48,419 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 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 04:54:48,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6069 states. [2021-11-03 04:54:48,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6069 to 3707. [2021-11-03 04:54:48,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3707 states, 2929 states have (on average 1.7196995561625128) internal successors, (5037), 3706 states have internal predecessors, (5037), 0 states have call successors, (0), 0 states 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 04:54:48,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3707 states to 3707 states and 5037 transitions. [2021-11-03 04:54:48,465 INFO L78 Accepts]: Start accepts. Automaton has 3707 states and 5037 transitions. Word has length 68 [2021-11-03 04:54:48,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:54:48,465 INFO L470 AbstractCegarLoop]: Abstraction has 3707 states and 5037 transitions. [2021-11-03 04:54:48,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:48,465 INFO L276 IsEmpty]: Start isEmpty. Operand 3707 states and 5037 transitions. [2021-11-03 04:54:48,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 04:54:48,466 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:54:48,466 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:54:48,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-03 04:54:48,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:54:48,681 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr397ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:54:48,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:54:48,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1355543210, now seen corresponding path program 1 times [2021-11-03 04:54:48,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:54:48,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1811167425] [2021-11-03 04:54:48,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:54:48,683 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:54:48,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:54:48,683 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:54:48,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-03 04:54:49,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:54:49,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 04:54:49,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:54:49,571 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 04:54:49,597 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 04:54:49,608 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 04:54:49,684 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 04:54:49,687 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 04:54:49,752 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 04:54:49,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:54:50,234 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 04:54:50,234 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:54:50,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1811167425] [2021-11-03 04:54:50,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1811167425] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:54:50,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:54:50,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 04:54:50,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975317816] [2021-11-03 04:54:50,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:54:50,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:54:50,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:54:50,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:54:50,236 INFO L87 Difference]: Start difference. First operand 3707 states and 5037 transitions. Second operand has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:55:20,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:55:20,045 INFO L93 Difference]: Finished difference Result 5559 states and 7494 transitions. [2021-11-03 04:55:20,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 04:55:20,046 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-03 04:55:20,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:55:20,050 INFO L225 Difference]: With dead ends: 5559 [2021-11-03 04:55:20,050 INFO L226 Difference]: Without dead ends: 5559 [2021-11-03 04:55:20,050 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 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 04:55:20,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5559 states. [2021-11-03 04:55:20,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5559 to 3706. [2021-11-03 04:55:20,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3706 states, 2929 states have (on average 1.7186753158074428) internal successors, (5034), 3705 states have internal predecessors, (5034), 0 states have call successors, (0), 0 states 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 04:55:20,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3706 states to 3706 states and 5034 transitions. [2021-11-03 04:55:20,088 INFO L78 Accepts]: Start accepts. Automaton has 3706 states and 5034 transitions. Word has length 69 [2021-11-03 04:55:20,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:55:20,088 INFO L470 AbstractCegarLoop]: Abstraction has 3706 states and 5034 transitions. [2021-11-03 04:55:20,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:55:20,089 INFO L276 IsEmpty]: Start isEmpty. Operand 3706 states and 5034 transitions. [2021-11-03 04:55:20,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 04:55:20,089 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:55:20,089 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:55:20,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-03 04:55:20,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:55:20,316 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr79ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:55:20,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:55:20,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1833592125, now seen corresponding path program 1 times [2021-11-03 04:55:20,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:55:20,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1206703234] [2021-11-03 04:55:20,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:55:20,317 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:55:20,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:55:20,318 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:55:20,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-03 04:55:21,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:55:21,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 04:55:21,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:55:21,206 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 04:55:21,225 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 04:55:21,232 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 04:55:21,288 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 04:55:21,291 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 04:55:21,379 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 04:55:21,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:55:21,805 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 04:55:21,805 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:55:21,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1206703234] [2021-11-03 04:55:21,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1206703234] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:55:21,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:55:21,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 04:55:21,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175166231] [2021-11-03 04:55:21,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:55:21,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:55:21,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:55:21,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:55:21,807 INFO L87 Difference]: Start difference. First operand 3706 states and 5034 transitions. Second operand has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:55:53,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:55:53,377 INFO L93 Difference]: Finished difference Result 5554 states and 7485 transitions. [2021-11-03 04:55:53,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 04:55:53,378 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-03 04:55:53,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:55:53,381 INFO L225 Difference]: With dead ends: 5554 [2021-11-03 04:55:53,381 INFO L226 Difference]: Without dead ends: 5554 [2021-11-03 04:55:53,382 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 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 04:55:53,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5554 states. [2021-11-03 04:55:53,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5554 to 3705. [2021-11-03 04:55:53,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3705 states, 2929 states have (on average 1.7179924889040628) internal successors, (5032), 3704 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states 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 04:55:53,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3705 states to 3705 states and 5032 transitions. [2021-11-03 04:55:53,418 INFO L78 Accepts]: Start accepts. Automaton has 3705 states and 5032 transitions. Word has length 69 [2021-11-03 04:55:53,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:55:53,418 INFO L470 AbstractCegarLoop]: Abstraction has 3705 states and 5032 transitions. [2021-11-03 04:55:53,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:55:53,419 INFO L276 IsEmpty]: Start isEmpty. Operand 3705 states and 5032 transitions. [2021-11-03 04:55:53,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 04:55:53,419 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:55:53,419 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:55:53,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-03 04:55:53,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:55:53,620 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:55:53,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:55:53,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1361720913, now seen corresponding path program 1 times [2021-11-03 04:55:53,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:55:53,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312473411] [2021-11-03 04:55:53,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:55:53,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:55:53,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:55:53,622 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:55:53,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-03 04:55:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:55:54,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:55:54,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:55:54,581 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 04:55:54,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:55:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:55:54,722 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:55:54,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312473411] [2021-11-03 04:55:54,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312473411] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:55:54,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:55:54,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:55:54,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149202753] [2021-11-03 04:55:54,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:55:54,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:55:54,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:55:54,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:55:54,732 INFO L87 Difference]: Start difference. First operand 3705 states and 5032 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 04:55:54,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:55:54,962 INFO L93 Difference]: Finished difference Result 6082 states and 8217 transitions. [2021-11-03 04:55:54,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:55:54,962 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 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 04:55:54,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:55:54,969 INFO L225 Difference]: With dead ends: 6082 [2021-11-03 04:55:54,970 INFO L226 Difference]: Without dead ends: 6082 [2021-11-03 04:55:54,970 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 140 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 04:55:54,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6082 states. [2021-11-03 04:55:55,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6082 to 3720. [2021-11-03 04:55:55,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3720 states, 2944 states have (on average 1.7143342391304348) internal successors, (5047), 3719 states have internal predecessors, (5047), 0 states have call successors, (0), 0 states 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 04:55:55,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5047 transitions. [2021-11-03 04:55:55,025 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5047 transitions. Word has length 73 [2021-11-03 04:55:55,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:55:55,025 INFO L470 AbstractCegarLoop]: Abstraction has 3720 states and 5047 transitions. [2021-11-03 04:55:55,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 04:55:55,025 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5047 transitions. [2021-11-03 04:55:55,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-03 04:55:55,026 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:55:55,026 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, 1, 1] [2021-11-03 04:55:55,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-03 04:55:55,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:55:55,242 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:55:55,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:55:55,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1412235279, now seen corresponding path program 1 times [2021-11-03 04:55:55,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:55:55,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1597468127] [2021-11-03 04:55:55,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:55:55,244 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:55:55,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:55:55,245 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:55:55,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-03 04:55:56,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:55:56,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:55:56,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:55:56,410 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 04:55:56,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:55:56,664 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 04:55:56,664 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:55:56,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1597468127] [2021-11-03 04:55:56,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1597468127] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:55:56,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [289432904] [2021-11-03 04:55:56,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:55:56,665 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:55:56,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:55:56,667 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:55:56,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-03 04:55:57,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:55:57,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:55:57,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:55:58,068 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 04:55:58,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:55:58,226 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 04:55:58,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [289432904] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:55:58,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415586867] [2021-11-03 04:55:58,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:55:58,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:55:58,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:55:58,229 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:55:58,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-03 04:55:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:55:59,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:55:59,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:55:59,387 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 04:55:59,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:55:59,508 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 04:55:59,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415586867] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:55:59,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:55:59,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-11-03 04:55:59,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147128864] [2021-11-03 04:55:59,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:55:59,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:55:59,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:55:59,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:55:59,510 INFO L87 Difference]: Start difference. First operand 3720 states and 5047 transitions. Second operand has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:56:00,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:56:00,202 INFO L93 Difference]: Finished difference Result 6112 states and 8247 transitions. [2021-11-03 04:56:00,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:56:00,213 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-03 04:56:00,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:56:00,218 INFO L225 Difference]: With dead ends: 6112 [2021-11-03 04:56:00,218 INFO L226 Difference]: Without dead ends: 6112 [2021-11-03 04:56:00,219 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 436 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 04:56:00,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6112 states. [2021-11-03 04:56:00,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6112 to 3750. [2021-11-03 04:56:00,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3750 states, 2974 states have (on average 1.707128446536651) internal successors, (5077), 3749 states have internal predecessors, (5077), 0 states have call successors, (0), 0 states 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 04:56:00,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3750 states to 3750 states and 5077 transitions. [2021-11-03 04:56:00,273 INFO L78 Accepts]: Start accepts. Automaton has 3750 states and 5077 transitions. Word has length 75 [2021-11-03 04:56:00,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:56:00,273 INFO L470 AbstractCegarLoop]: Abstraction has 3750 states and 5077 transitions. [2021-11-03 04:56:00,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:56:00,274 INFO L276 IsEmpty]: Start isEmpty. Operand 3750 states and 5077 transitions. [2021-11-03 04:56:00,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-03 04:56:00,274 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:56:00,275 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, 1, 1] [2021-11-03 04:56:00,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2021-11-03 04:56:00,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-03 04:56:00,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-03 04:56:00,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:56:00,881 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:56:00,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:56:00,882 INFO L85 PathProgramCache]: Analyzing trace with hash -547693775, now seen corresponding path program 2 times [2021-11-03 04:56:00,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:56:00,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733316557] [2021-11-03 04:56:00,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:56:00,883 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:56:00,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:56:00,884 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:56:00,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ccff57d8-c6a2-48cd-88cb-e92f14055526/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-03 04:56:02,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-03 04:56:02,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:56:02,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:56:02,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:56:02,084 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 04:56:02,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:56:02,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:56:02,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:56:02,159 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-03 04:56:02,159 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 04:56:02,251 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-03 04:56:02,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-03 04:56:02,491 INFO L354 Elim1Store]: treesize reduction 229, result has 11.2 percent of original size [2021-11-03 04:56:02,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 66 treesize of output 86 [2021-11-03 04:56:07,943 INFO L354 Elim1Store]: treesize reduction 1963, result has 5.1 percent of original size [2021-11-03 04:56:07,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 39 case distinctions, treesize of input 118 treesize of output 150 [2021-11-03 04:56:17,645 INFO L354 Elim1Store]: treesize reduction 876, result has 0.1 percent of original size [2021-11-03 04:56:17,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 157 treesize of output 67 [2021-11-03 04:56:17,851 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-03 04:56:17,851 INFO L328 TraceCheckSpWp]: Computing backward predicates...