./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8 --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 143a30a80a62e6cad7506820b1f96be933051e37975b620c656decb608437802 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:09:44,215 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:09:44,219 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:09:44,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:09:44,294 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:09:44,297 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:09:44,302 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:09:44,308 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:09:44,313 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:09:44,317 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:09:44,319 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:09:44,324 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:09:44,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:09:44,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:09:44,336 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:09:44,339 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:09:44,341 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:09:44,343 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:09:44,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:09:44,357 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:09:44,363 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:09:44,365 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:09:44,370 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:09:44,371 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:09:44,379 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:09:44,380 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:09:44,380 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:09:44,383 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:09:44,384 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:09:44,386 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:09:44,386 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:09:44,388 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:09:44,391 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:09:44,392 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:09:44,394 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:09:44,395 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:09:44,396 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:09:44,396 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:09:44,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:09:44,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:09:44,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:09:44,401 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-07 02:09:44,462 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:09:44,463 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:09:44,465 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:09:44,465 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:09:44,466 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:09:44,466 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:09:44,466 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:09:44,467 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:09:44,467 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:09:44,467 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:09:44,469 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:09:44,469 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:09:44,469 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:09:44,470 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:09:44,470 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:09:44,471 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 02:09:44,471 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 02:09:44,472 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:09:44,472 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:09:44,472 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 02:09:44,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:09:44,473 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:09:44,473 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:09:44,473 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 02:09:44,474 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 02:09:44,474 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 02:09:44,474 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:09:44,474 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:09:44,475 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:09:44,475 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:09:44,475 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:09:44,476 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:09:44,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:09:44,477 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:09:44,477 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:09:44,477 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:09:44,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:09:44,478 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:09:44,478 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:09:44,478 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_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 143a30a80a62e6cad7506820b1f96be933051e37975b620c656decb608437802 [2021-11-07 02:09:44,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:09:44,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:09:44,905 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:09:44,906 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:09:44,907 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:09:44,909 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-1.i [2021-11-07 02:09:45,018 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/data/d4fbca4d8/11ef530f5edb4bd889d07afbcd2d23fe/FLAGa66317a76 [2021-11-07 02:09:45,752 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:09:45,753 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-1.i [2021-11-07 02:09:45,787 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/data/d4fbca4d8/11ef530f5edb4bd889d07afbcd2d23fe/FLAGa66317a76 [2021-11-07 02:09:46,025 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/data/d4fbca4d8/11ef530f5edb4bd889d07afbcd2d23fe [2021-11-07 02:09:46,028 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:09:46,031 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:09:46,034 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:09:46,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:09:46,041 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:09:46,042 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:09:46" (1/1) ... [2021-11-07 02:09:46,043 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@232650e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:46, skipping insertion in model container [2021-11-07 02:09:46,043 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:09:46" (1/1) ... [2021-11-07 02:09:46,053 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:09:46,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:09:46,674 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:09:46,703 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 02:09:46,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5c3844e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:46, skipping insertion in model container [2021-11-07 02:09:46,707 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:09:46,708 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:09:46,713 INFO L168 Benchmark]: Toolchain (without parser) took 677.69 ms. Allocated memory is still 127.9 MB. Free memory was 92.9 MB in the beginning and 101.0 MB in the end (delta: -8.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 02:09:46,715 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 83.9 MB. Free memory was 55.8 MB in the beginning and 55.8 MB in the end (delta: 29.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:09:46,717 INFO L168 Benchmark]: CACSL2BoogieTranslator took 673.54 ms. Allocated memory is still 127.9 MB. Free memory was 92.6 MB in the beginning and 101.0 MB in the end (delta: -8.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 02:09:46,720 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 83.9 MB. Free memory was 55.8 MB in the beginning and 55.8 MB in the end (delta: 29.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 673.54 ms. Allocated memory is still 127.9 MB. Free memory was 92.6 MB in the beginning and 101.0 MB in the end (delta: -8.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: 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_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8 --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 143a30a80a62e6cad7506820b1f96be933051e37975b620c656decb608437802 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:09:49,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:09:49,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:09:49,639 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:09:49,640 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:09:49,645 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:09:49,647 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:09:49,653 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:09:49,657 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:09:49,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:09:49,669 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:09:49,671 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:09:49,671 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:09:49,675 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:09:49,677 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:09:49,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:09:49,685 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:09:49,687 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:09:49,689 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:09:49,701 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:09:49,704 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:09:49,709 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:09:49,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:09:49,716 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:09:49,728 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:09:49,729 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:09:49,729 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:09:49,732 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:09:49,733 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:09:49,734 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:09:49,735 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:09:49,737 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:09:49,739 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:09:49,740 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:09:49,742 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:09:49,743 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:09:49,751 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:09:49,752 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:09:49,752 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:09:49,754 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:09:49,755 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:09:49,756 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-07 02:09:49,820 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:09:49,820 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:09:49,822 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:09:49,822 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:09:49,822 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:09:49,823 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:09:49,823 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:09:49,823 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:09:49,824 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:09:49,825 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 02:09:49,827 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 02:09:49,827 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:09:49,828 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:09:49,828 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 02:09:49,828 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:09:49,828 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:09:49,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:09:49,829 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 02:09:49,829 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 02:09:49,830 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 02:09:49,830 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:09:49,830 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:09:49,830 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:09:49,831 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:09:49,831 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:09:49,831 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:09:49,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:09:49,832 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:09:49,832 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:09:49,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:09:49,833 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:09:49,833 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:09:49,834 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:09:49,834 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:09:49,834 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:09:49,834 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:09:49,835 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_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 143a30a80a62e6cad7506820b1f96be933051e37975b620c656decb608437802 [2021-11-07 02:09:50,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:09:50,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:09:50,407 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:09:50,409 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:09:50,410 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:09:50,411 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-1.i [2021-11-07 02:09:50,506 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/data/1a3fd20cf/5e5b5f21b4654f789b72df00ccaaecbb/FLAG3efc32a43 [2021-11-07 02:09:51,441 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:09:51,442 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-1.i [2021-11-07 02:09:51,463 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/data/1a3fd20cf/5e5b5f21b4654f789b72df00ccaaecbb/FLAG3efc32a43 [2021-11-07 02:09:51,610 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/data/1a3fd20cf/5e5b5f21b4654f789b72df00ccaaecbb [2021-11-07 02:09:51,623 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:09:51,625 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:09:51,627 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:09:51,628 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:09:51,632 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:09:51,633 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:09:51" (1/1) ... [2021-11-07 02:09:51,634 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eb31058 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:51, skipping insertion in model container [2021-11-07 02:09:51,635 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:09:51" (1/1) ... [2021-11-07 02:09:51,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:09:51,711 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:09:52,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:09:52,361 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:09:52,374 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:09:52,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:09:52,448 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:09:52,572 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:09:52,653 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:09:52,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:52 WrapperNode [2021-11-07 02:09:52,653 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:09:52,655 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:09:52,655 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:09:52,655 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:09:52,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:52" (1/1) ... [2021-11-07 02:09:52,697 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:52" (1/1) ... [2021-11-07 02:09:52,729 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:09:52,730 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:09:52,731 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:09:52,731 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:09:52,742 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:52" (1/1) ... [2021-11-07 02:09:52,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:52" (1/1) ... [2021-11-07 02:09:52,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:52" (1/1) ... [2021-11-07 02:09:52,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:52" (1/1) ... [2021-11-07 02:09:52,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:52" (1/1) ... [2021-11-07 02:09:52,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:52" (1/1) ... [2021-11-07 02:09:52,769 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:52" (1/1) ... [2021-11-07 02:09:52,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:09:52,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:09:52,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:09:52,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:09:52,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:52" (1/1) ... [2021-11-07 02:09:52,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:09:52,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:09:52,833 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:09:52,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:09:52,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 02:09:52,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 02:09:52,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:09:52,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 02:09:52,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 02:09:52,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 02:09:52,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:09:52,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:09:53,562 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:09:53,563 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-11-07 02:09:53,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:09:53 BoogieIcfgContainer [2021-11-07 02:09:53,566 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:09:53,569 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:09:53,569 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:09:53,573 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:09:53,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:09:51" (1/3) ... [2021-11-07 02:09:53,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5635fafe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:09:53, skipping insertion in model container [2021-11-07 02:09:53,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:52" (2/3) ... [2021-11-07 02:09:53,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5635fafe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:09:53, skipping insertion in model container [2021-11-07 02:09:53,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:09:53" (3/3) ... [2021-11-07 02:09:53,579 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test17_2-1.i [2021-11-07 02:09:53,587 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:09:53,588 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2021-11-07 02:09:53,661 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:09:53,670 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 [2021-11-07 02:09:53,670 INFO L340 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2021-11-07 02:09:53,711 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:53,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 02:09:53,719 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:53,728 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 02:09:53,729 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-07 02:09:53,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:53,736 INFO L85 PathProgramCache]: Analyzing trace with hash 889508815, now seen corresponding path program 1 times [2021-11-07 02:09:53,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:53,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1451233490] [2021-11-07 02:09:53,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:53,754 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:53,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:53,758 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:53,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:09:53,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:53,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:09:53,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:54,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:09:54,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:54,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:09:54,041 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:54,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1451233490] [2021-11-07 02:09:54,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1451233490] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:09:54,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:09:54,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:09:54,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300943481] [2021-11-07 02:09:54,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:09:54,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:54,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:09:54,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:09:54,074 INFO L87 Difference]: Start difference. First operand has 54 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:54,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:54,270 INFO L93 Difference]: Finished difference Result 187 states and 207 transitions. [2021-11-07 02:09:54,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:09:54,273 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-07 02:09:54,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:54,291 INFO L225 Difference]: With dead ends: 187 [2021-11-07 02:09:54,291 INFO L226 Difference]: Without dead ends: 179 [2021-11-07 02:09:54,293 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:09:54,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-07 02:09:54,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 54. [2021-11-07 02:09:54,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 53 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:54,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-11-07 02:09:54,344 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 6 [2021-11-07 02:09:54,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:54,345 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-11-07 02:09:54,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:54,345 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-11-07 02:09:54,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 02:09:54,346 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:54,346 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 02:09:54,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:54,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:09:54,553 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-07 02:09:54,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:54,554 INFO L85 PathProgramCache]: Analyzing trace with hash 889568397, now seen corresponding path program 1 times [2021-11-07 02:09:54,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:54,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [896325437] [2021-11-07 02:09:54,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:54,556 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:54,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:54,568 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:54,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:09:54,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:54,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:09:54,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:54,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:09:54,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:54,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:09:54,738 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:54,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [896325437] [2021-11-07 02:09:54,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [896325437] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:09:54,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:09:54,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:09:54,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095497501] [2021-11-07 02:09:54,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:09:54,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:54,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:09:54,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:09:54,744 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:54,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:54,935 INFO L93 Difference]: Finished difference Result 98 states and 110 transitions. [2021-11-07 02:09:54,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:09:54,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-07 02:09:54,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:54,938 INFO L225 Difference]: With dead ends: 98 [2021-11-07 02:09:54,938 INFO L226 Difference]: Without dead ends: 97 [2021-11-07 02:09:54,939 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:09:54,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-07 02:09:54,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 52. [2021-11-07 02:09:54,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 51 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:54,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2021-11-07 02:09:54,958 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 6 [2021-11-07 02:09:54,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:54,959 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2021-11-07 02:09:54,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:54,960 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2021-11-07 02:09:54,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 02:09:54,960 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:54,960 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:09:54,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:55,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:09:55,162 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-07 02:09:55,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:55,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1804968521, now seen corresponding path program 1 times [2021-11-07 02:09:55,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:55,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [552507032] [2021-11-07 02:09:55,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:55,164 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:55,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:55,174 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:55,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:09:55,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:55,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:09:55,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:55,326 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 [2021-11-07 02:09:55,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:09:55,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:55,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:09:55,401 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:55,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [552507032] [2021-11-07 02:09:55,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [552507032] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:09:55,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:09:55,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:09:55,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490727225] [2021-11-07 02:09:55,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:09:55,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:55,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:09:55,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:09:55,405 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:55,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:55,767 INFO L93 Difference]: Finished difference Result 170 states and 191 transitions. [2021-11-07 02:09:55,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:09:55,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-07 02:09:55,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:55,772 INFO L225 Difference]: With dead ends: 170 [2021-11-07 02:09:55,772 INFO L226 Difference]: Without dead ends: 170 [2021-11-07 02:09:55,772 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:09:55,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-07 02:09:55,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 71. [2021-11-07 02:09:55,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 53 states have (on average 1.6603773584905661) internal successors, (88), 70 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:55,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2021-11-07 02:09:55,783 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 7 [2021-11-07 02:09:55,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:55,783 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2021-11-07 02:09:55,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:55,784 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2021-11-07 02:09:55,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 02:09:55,785 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:55,785 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:09:55,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:56,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:09:56,003 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-07 02:09:56,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:56,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1804968522, now seen corresponding path program 1 times [2021-11-07 02:09:56,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:56,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1426646386] [2021-11-07 02:09:56,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:56,005 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:56,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:56,007 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:56,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:09:56,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:56,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:09:56,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:09:56,127 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 [2021-11-07 02:09:56,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:09:56,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:56,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:09:56,754 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:09:56,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1426646386] [2021-11-07 02:09:56,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1426646386] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:09:56,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:09:56,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 02:09:56,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695796003] [2021-11-07 02:09:56,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:09:56,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:09:56,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:09:56,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:09:56,758 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 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) [2021-11-07 02:09:59,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:09:59,608 INFO L93 Difference]: Finished difference Result 630 states and 734 transitions. [2021-11-07 02:09:59,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 02:09:59,609 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 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 7 [2021-11-07 02:09:59,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:09:59,615 INFO L225 Difference]: With dead ends: 630 [2021-11-07 02:09:59,615 INFO L226 Difference]: Without dead ends: 630 [2021-11-07 02:09:59,616 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2021-11-07 02:09:59,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-11-07 02:09:59,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 107. [2021-11-07 02:09:59,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 89 states have (on average 1.651685393258427) internal successors, (147), 106 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:09:59,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 147 transitions. [2021-11-07 02:09:59,644 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 147 transitions. Word has length 7 [2021-11-07 02:09:59,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:09:59,644 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 147 transitions. [2021-11-07 02:09:59,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 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) [2021-11-07 02:09:59,645 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 147 transitions. [2021-11-07 02:09:59,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 02:09:59,646 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:09:59,646 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:09:59,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:09:59,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:09:59,872 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-07 02:09:59,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:09:59,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1806815563, now seen corresponding path program 1 times [2021-11-07 02:09:59,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:09:59,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1082892350] [2021-11-07 02:09:59,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:09:59,877 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:09:59,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:09:59,879 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:09:59,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:09:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:09:59,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:09:59,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:00,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:00,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:00,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:00,075 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:00,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1082892350] [2021-11-07 02:10:00,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1082892350] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:00,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:00,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:10:00,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322793613] [2021-11-07 02:10:00,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:10:00,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:00,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:10:00,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:10:00,079 INFO L87 Difference]: Start difference. First operand 107 states and 147 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:00,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:00,167 INFO L93 Difference]: Finished difference Result 161 states and 213 transitions. [2021-11-07 02:10:00,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:10:00,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-07 02:10:00,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:00,170 INFO L225 Difference]: With dead ends: 161 [2021-11-07 02:10:00,170 INFO L226 Difference]: Without dead ends: 159 [2021-11-07 02:10:00,170 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:10:00,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-07 02:10:00,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 90. [2021-11-07 02:10:00,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 73 states have (on average 1.643835616438356) internal successors, (120), 89 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) [2021-11-07 02:10:00,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 120 transitions. [2021-11-07 02:10:00,180 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 120 transitions. Word has length 7 [2021-11-07 02:10:00,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:00,181 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 120 transitions. [2021-11-07 02:10:00,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:00,181 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 120 transitions. [2021-11-07 02:10:00,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 02:10:00,182 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:00,182 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:00,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:00,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:00,409 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-07 02:10:00,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:00,409 INFO L85 PathProgramCache]: Analyzing trace with hash -2063334261, now seen corresponding path program 1 times [2021-11-07 02:10:00,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:00,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [834993171] [2021-11-07 02:10:00,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:00,411 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:00,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:00,412 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:00,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:10:00,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:00,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:10:00,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:00,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:00,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:00,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:00,648 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:00,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [834993171] [2021-11-07 02:10:00,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [834993171] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:00,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:00,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:10:00,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394328612] [2021-11-07 02:10:00,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:10:00,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:00,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:10:00,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:10:00,652 INFO L87 Difference]: Start difference. First operand 90 states and 120 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2021-11-07 02:10:00,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:00,697 INFO L93 Difference]: Finished difference Result 90 states and 118 transitions. [2021-11-07 02:10:00,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:10:00,698 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 11 [2021-11-07 02:10:00,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:00,699 INFO L225 Difference]: With dead ends: 90 [2021-11-07 02:10:00,699 INFO L226 Difference]: Without dead ends: 90 [2021-11-07 02:10:00,699 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:10:00,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-07 02:10:00,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-11-07 02:10:00,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 73 states have (on average 1.6164383561643836) internal successors, (118), 89 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:00,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 118 transitions. [2021-11-07 02:10:00,709 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 118 transitions. Word has length 11 [2021-11-07 02:10:00,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:00,710 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 118 transitions. [2021-11-07 02:10:00,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2021-11-07 02:10:00,710 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 118 transitions. [2021-11-07 02:10:00,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 02:10:00,711 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:00,712 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:00,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:00,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:00,917 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-07 02:10:00,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:00,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1768457930, now seen corresponding path program 1 times [2021-11-07 02:10:00,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:00,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340773103] [2021-11-07 02:10:00,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:00,919 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:00,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:00,921 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:00,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:10:01,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:01,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:10:01,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:01,087 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 [2021-11-07 02:10:01,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:01,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:02,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:02,572 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:02,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340773103] [2021-11-07 02:10:02,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340773103] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:02,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1993761394] [2021-11-07 02:10:02,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:02,573 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:10:02,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:10:02,576 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:10:02,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-07 02:10:02,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:02,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:10:02,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:02,851 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 [2021-11-07 02:10:03,002 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:03,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:03,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:03,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1993761394] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:03,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101254859] [2021-11-07 02:10:03,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:03,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:10:03,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:10:03,403 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:10:03,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 02:10:03,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:03,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:10:03,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:03,592 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 [2021-11-07 02:10:03,771 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:03,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:04,142 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:04,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101254859] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:04,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:10:04,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 13 [2021-11-07 02:10:04,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104177350] [2021-11-07 02:10:04,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 02:10:04,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:04,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 02:10:04,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:10:04,145 INFO L87 Difference]: Start difference. First operand 90 states and 118 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 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) [2021-11-07 02:10:06,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:06,542 INFO L93 Difference]: Finished difference Result 514 states and 587 transitions. [2021-11-07 02:10:06,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 02:10:06,543 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 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 13 [2021-11-07 02:10:06,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:06,546 INFO L225 Difference]: With dead ends: 514 [2021-11-07 02:10:06,546 INFO L226 Difference]: Without dead ends: 514 [2021-11-07 02:10:06,546 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=193, Invalid=407, Unknown=0, NotChecked=0, Total=600 [2021-11-07 02:10:06,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-11-07 02:10:06,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 102. [2021-11-07 02:10:06,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 85 states have (on average 1.576470588235294) internal successors, (134), 101 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:06,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 134 transitions. [2021-11-07 02:10:06,555 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 134 transitions. Word has length 13 [2021-11-07 02:10:06,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:06,555 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 134 transitions. [2021-11-07 02:10:06,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 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) [2021-11-07 02:10:06,555 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 134 transitions. [2021-11-07 02:10:06,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:10:06,556 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:06,557 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:06,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-07 02:10:06,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2021-11-07 02:10:06,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-07 02:10:07,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:07,173 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-07 02:10:07,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:07,173 INFO L85 PathProgramCache]: Analyzing trace with hash -573527797, now seen corresponding path program 1 times [2021-11-07 02:10:07,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:07,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1201994120] [2021-11-07 02:10:07,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:07,174 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:07,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:07,174 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:07,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:10:07,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:07,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:10:07,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:07,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:07,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:07,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:07,537 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:07,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1201994120] [2021-11-07 02:10:07,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1201994120] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:07,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2025797336] [2021-11-07 02:10:07,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:07,538 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:10:07,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:10:07,539 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:10:07,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-07 02:10:07,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:07,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:10:07,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:07,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:07,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:07,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:07,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2025797336] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:07,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76506050] [2021-11-07 02:10:07,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:07,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:10:07,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:10:07,963 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:10:07,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 02:10:08,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:08,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:10:08,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:08,161 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 [2021-11-07 02:10:08,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:10:08,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:08,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:10:08,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76506050] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:08,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:10:08,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6, 6, 6] total 13 [2021-11-07 02:10:08,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600158042] [2021-11-07 02:10:08,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:10:08,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:08,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:10:08,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:10:08,347 INFO L87 Difference]: Start difference. First operand 102 states and 134 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:08,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:08,609 INFO L93 Difference]: Finished difference Result 176 states and 230 transitions. [2021-11-07 02:10:08,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:10:08,610 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 02:10:08,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:08,611 INFO L225 Difference]: With dead ends: 176 [2021-11-07 02:10:08,611 INFO L226 Difference]: Without dead ends: 176 [2021-11-07 02:10:08,612 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:10:08,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-07 02:10:08,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 103. [2021-11-07 02:10:08,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 87 states have (on average 1.5632183908045978) internal successors, (136), 102 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:08,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 136 transitions. [2021-11-07 02:10:08,618 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 136 transitions. Word has length 17 [2021-11-07 02:10:08,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:08,618 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 136 transitions. [2021-11-07 02:10:08,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:08,619 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 136 transitions. [2021-11-07 02:10:08,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:10:08,619 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:08,619 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:08,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:08,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:09,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:09,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:10:09,220 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-07 02:10:09,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:09,221 INFO L85 PathProgramCache]: Analyzing trace with hash -573527796, now seen corresponding path program 1 times [2021-11-07 02:10:09,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:09,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [302246566] [2021-11-07 02:10:09,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:09,222 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:09,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:09,223 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:09,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:10:09,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:09,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:10:09,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:09,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:09,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:09,681 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:09,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [302246566] [2021-11-07 02:10:09,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [302246566] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:09,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1541696846] [2021-11-07 02:10:09,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:09,682 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:10:09,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:10:09,684 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:10:09,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-07 02:10:09,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:09,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:10:09,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:10,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:10,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:10,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:10,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1541696846] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:10,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868648157] [2021-11-07 02:10:10,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:10,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:10:10,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:10:10,176 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:10:10,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 02:10:10,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:10,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:10:10,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:10,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:10:10,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:10,654 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:10:10,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868648157] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:10,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:10:10,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6, 6, 6] total 14 [2021-11-07 02:10:10,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349232266] [2021-11-07 02:10:10,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:10:10,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:10,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:10:10,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:10:10,656 INFO L87 Difference]: Start difference. First operand 103 states and 136 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:10,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:10,759 INFO L93 Difference]: Finished difference Result 154 states and 202 transitions. [2021-11-07 02:10:10,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:10:10,761 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 02:10:10,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:10,762 INFO L225 Difference]: With dead ends: 154 [2021-11-07 02:10:10,762 INFO L226 Difference]: Without dead ends: 154 [2021-11-07 02:10:10,763 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:10:10,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-07 02:10:10,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 113. [2021-11-07 02:10:10,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 97 states have (on average 1.5463917525773196) internal successors, (150), 112 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:10,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 150 transitions. [2021-11-07 02:10:10,776 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 150 transitions. Word has length 17 [2021-11-07 02:10:10,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:10,777 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 150 transitions. [2021-11-07 02:10:10,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:10,777 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 150 transitions. [2021-11-07 02:10:10,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 02:10:10,779 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:10,780 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:10,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:11,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:11,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:11,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:10:11,398 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-07 02:10:11,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:11,399 INFO L85 PathProgramCache]: Analyzing trace with hash -598203396, now seen corresponding path program 1 times [2021-11-07 02:10:11,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:11,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2001047003] [2021-11-07 02:10:11,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:11,400 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:11,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:11,400 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:11,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:10:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:11,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:10:11,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:11,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:11,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:11,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:11,895 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:11,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2001047003] [2021-11-07 02:10:11,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2001047003] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:11,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [466458289] [2021-11-07 02:10:11,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:11,896 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:10:11,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:10:11,898 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:10:11,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-07 02:10:12,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:12,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:10:12,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:12,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:12,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:12,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:12,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [466458289] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:12,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280142678] [2021-11-07 02:10:12,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:12,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:10:12,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:10:12,389 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:10:12,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 02:10:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:12,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:10:12,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:12,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:12,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:12,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280142678] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:12,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:10:12,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-11-07 02:10:12,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940384384] [2021-11-07 02:10:12,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:10:12,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:12,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:10:12,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:10:12,831 INFO L87 Difference]: Start difference. First operand 113 states and 150 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:13,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:13,036 INFO L93 Difference]: Finished difference Result 113 states and 146 transitions. [2021-11-07 02:10:13,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:10:13,041 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-07 02:10:13,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:13,042 INFO L225 Difference]: With dead ends: 113 [2021-11-07 02:10:13,042 INFO L226 Difference]: Without dead ends: 113 [2021-11-07 02:10:13,043 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:10:13,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-07 02:10:13,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-11-07 02:10:13,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 97 states have (on average 1.5051546391752577) internal successors, (146), 112 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:13,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 146 transitions. [2021-11-07 02:10:13,053 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 146 transitions. Word has length 18 [2021-11-07 02:10:13,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:13,054 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 146 transitions. [2021-11-07 02:10:13,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:13,054 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 146 transitions. [2021-11-07 02:10:13,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 02:10:13,056 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:13,056 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:13,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:13,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:13,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:13,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:10:13,676 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-07 02:10:13,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:13,677 INFO L85 PathProgramCache]: Analyzing trace with hash -2017579062, now seen corresponding path program 2 times [2021-11-07 02:10:13,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:13,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [886966532] [2021-11-07 02:10:13,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:10:13,677 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:13,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:13,679 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:13,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:10:13,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:10:13,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:10:13,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 02:10:13,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:13,934 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 8 treesize of output 7 [2021-11-07 02:10:14,529 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:14,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:17,345 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:17,345 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:17,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [886966532] [2021-11-07 02:10:17,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [886966532] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:17,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [830301443] [2021-11-07 02:10:17,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:10:17,346 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:10:17,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:10:17,348 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:10:17,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 02:10:17,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:10:17,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:10:17,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 02:10:17,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:17,848 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 [2021-11-07 02:10:18,546 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:18,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:21,541 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:21,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [830301443] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:21,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595916074] [2021-11-07 02:10:21,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:10:21,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:10:21,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:10:21,554 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:10:21,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-07 02:10:21,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:10:21,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:10:21,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 02:10:21,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:21,928 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 [2021-11-07 02:10:22,194 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:22,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:25,655 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:25,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595916074] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:25,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:10:25,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11, 11, 11, 12] total 49 [2021-11-07 02:10:25,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647502031] [2021-11-07 02:10:25,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-07 02:10:25,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:25,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-07 02:10:25,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=2006, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 02:10:25,659 INFO L87 Difference]: Start difference. First operand 113 states and 146 transitions. Second operand has 50 states, 49 states have (on average 2.306122448979592) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:45,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:45,844 INFO L93 Difference]: Finished difference Result 884 states and 1031 transitions. [2021-11-07 02:10:45,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-07 02:10:45,846 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.306122448979592) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 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 25 [2021-11-07 02:10:45,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:45,852 INFO L225 Difference]: With dead ends: 884 [2021-11-07 02:10:45,852 INFO L226 Difference]: Without dead ends: 884 [2021-11-07 02:10:45,856 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1933 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=1646, Invalid=5664, Unknown=0, NotChecked=0, Total=7310 [2021-11-07 02:10:45,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-11-07 02:10:45,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 137. [2021-11-07 02:10:45,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 121 states have (on average 1.462809917355372) internal successors, (177), 136 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:45,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 177 transitions. [2021-11-07 02:10:45,866 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 177 transitions. Word has length 25 [2021-11-07 02:10:45,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:45,866 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 177 transitions. [2021-11-07 02:10:45,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.306122448979592) internal successors, (113), 50 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:45,867 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 177 transitions. [2021-11-07 02:10:45,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 02:10:45,868 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:45,868 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:45,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:46,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:46,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:46,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:10:46,480 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-07 02:10:46,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:46,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1653481744, now seen corresponding path program 2 times [2021-11-07 02:10:46,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:46,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1034893441] [2021-11-07 02:10:46,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:10:46,482 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:46,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:46,483 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:46,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 02:10:46,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-07 02:10:46,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:10:46,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 02:10:46,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:46,885 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 [2021-11-07 02:10:47,206 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-07 02:10:47,207 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 12 treesize of output 18 [2021-11-07 02:10:47,355 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-07 02:10:47,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:48,918 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-07 02:10:48,919 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:48,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1034893441] [2021-11-07 02:10:48,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1034893441] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:48,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:10:48,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-11-07 02:10:48,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542519739] [2021-11-07 02:10:48,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 02:10:48,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:48,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 02:10:48,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:10:48,921 INFO L87 Difference]: Start difference. First operand 137 states and 177 transitions. Second operand has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:53,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:53,516 INFO L93 Difference]: Finished difference Result 324 states and 373 transitions. [2021-11-07 02:10:53,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 02:10:53,518 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 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 33 [2021-11-07 02:10:53,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:53,522 INFO L225 Difference]: With dead ends: 324 [2021-11-07 02:10:53,522 INFO L226 Difference]: Without dead ends: 324 [2021-11-07 02:10:53,522 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-11-07 02:10:53,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-11-07 02:10:53,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 113. [2021-11-07 02:10:53,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 98 states have (on average 1.3877551020408163) internal successors, (136), 112 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:53,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 136 transitions. [2021-11-07 02:10:53,528 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 136 transitions. Word has length 33 [2021-11-07 02:10:53,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:53,529 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 136 transitions. [2021-11-07 02:10:53,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:53,529 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 136 transitions. [2021-11-07 02:10:53,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 02:10:53,530 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:53,531 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:53,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:53,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:53,743 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-07 02:10:53,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:53,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1098282606, now seen corresponding path program 1 times [2021-11-07 02:10:53,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:53,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [818288333] [2021-11-07 02:10:53,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:53,745 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:53,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:53,746 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:53,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 02:10:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:54,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:10:54,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:54,351 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:54,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:54,756 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:54,756 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:54,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [818288333] [2021-11-07 02:10:54,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [818288333] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:54,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1657485] [2021-11-07 02:10:54,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:54,757 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:10:54,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:10:54,758 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:10:54,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-07 02:10:55,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:55,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:10:55,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:55,496 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:55,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:55,632 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:55,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1657485] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:55,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032607978] [2021-11-07 02:10:55,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:55,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:10:55,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:10:55,633 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:10:55,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-07 02:10:56,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:56,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:10:56,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:56,185 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-07 02:10:56,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:56,376 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-07 02:10:56,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032607978] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:56,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:10:56,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 11, 11, 11] total 23 [2021-11-07 02:10:56,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200933777] [2021-11-07 02:10:56,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:10:56,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:56,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:10:56,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-11-07 02:10:56,378 INFO L87 Difference]: Start difference. First operand 113 states and 136 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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) [2021-11-07 02:10:56,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:56,478 INFO L93 Difference]: Finished difference Result 180 states and 208 transitions. [2021-11-07 02:10:56,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:10:56,479 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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 35 [2021-11-07 02:10:56,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:56,480 INFO L225 Difference]: With dead ends: 180 [2021-11-07 02:10:56,480 INFO L226 Difference]: Without dead ends: 180 [2021-11-07 02:10:56,481 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2021-11-07 02:10:56,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-07 02:10:56,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 116. [2021-11-07 02:10:56,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 101 states have (on average 1.3564356435643565) internal successors, (137), 115 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:56,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 137 transitions. [2021-11-07 02:10:56,485 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 137 transitions. Word has length 35 [2021-11-07 02:10:56,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:56,485 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 137 transitions. [2021-11-07 02:10:56,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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) [2021-11-07 02:10:56,486 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 137 transitions. [2021-11-07 02:10:56,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 02:10:56,487 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:56,487 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:56,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:56,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:56,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:57,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:10:57,091 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-07 02:10:57,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:57,091 INFO L85 PathProgramCache]: Analyzing trace with hash 852338959, now seen corresponding path program 1 times [2021-11-07 02:10:57,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:57,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988626678] [2021-11-07 02:10:57,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:57,092 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:57,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:57,092 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:57,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 02:10:57,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:57,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:10:57,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:57,757 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:57,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:58,134 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:10:58,134 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:10:58,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988626678] [2021-11-07 02:10:58,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988626678] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:10:58,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2060674165] [2021-11-07 02:10:58,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:58,134 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:10:58,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:10:58,135 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:10:58,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 02:10:58,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:58,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:10:58,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:10:58,846 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-07 02:10:58,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:10:58,951 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-07 02:10:58,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2060674165] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:10:58,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:10:58,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 11] total 22 [2021-11-07 02:10:58,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913718376] [2021-11-07 02:10:58,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:10:58,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:10:58,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:10:58,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:10:58,953 INFO L87 Difference]: Start difference. First operand 116 states and 137 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:59,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:10:59,003 INFO L93 Difference]: Finished difference Result 165 states and 192 transitions. [2021-11-07 02:10:59,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:10:59,008 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-07 02:10:59,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:10:59,010 INFO L225 Difference]: With dead ends: 165 [2021-11-07 02:10:59,010 INFO L226 Difference]: Without dead ends: 165 [2021-11-07 02:10:59,010 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-11-07 02:10:59,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-07 02:10:59,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2021-11-07 02:10:59,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 103 states have (on average 1.3398058252427185) internal successors, (138), 117 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:59,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 138 transitions. [2021-11-07 02:10:59,014 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 138 transitions. Word has length 38 [2021-11-07 02:10:59,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:10:59,015 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 138 transitions. [2021-11-07 02:10:59,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:10:59,015 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 138 transitions. [2021-11-07 02:10:59,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 02:10:59,016 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:10:59,017 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:10:59,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:59,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-07 02:10:59,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:10:59,420 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-07 02:10:59,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:10:59,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1532397329, now seen corresponding path program 1 times [2021-11-07 02:10:59,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:10:59,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1260200385] [2021-11-07 02:10:59,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:10:59,421 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:10:59,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:10:59,422 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:10:59,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 02:10:59,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:10:59,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:10:59,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:00,232 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:11:00,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:00,641 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:11:00,641 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:00,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1260200385] [2021-11-07 02:11:00,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1260200385] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:11:00,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [218772445] [2021-11-07 02:11:00,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:00,642 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:11:00,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:11:00,643 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:11:00,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-07 02:11:01,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:01,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:11:01,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:01,513 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:11:01,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:01,680 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:11:01,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [218772445] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:11:01,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41284450] [2021-11-07 02:11:01,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:01,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:11:01,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:11:01,682 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:11:01,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-07 02:11:02,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:02,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 02:11:02,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:02,369 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 [2021-11-07 02:11:02,837 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-07 02:11:02,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:03,878 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-07 02:11:03,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41284450] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:03,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:11:03,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [11, 11, 11, 11] total 28 [2021-11-07 02:11:03,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642240103] [2021-11-07 02:11:03,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:11:03,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:03,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:11:03,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2021-11-07 02:11:03,880 INFO L87 Difference]: Start difference. First operand 118 states and 138 transitions. Second operand has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:06,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:06,620 INFO L93 Difference]: Finished difference Result 349 states and 397 transitions. [2021-11-07 02:11:06,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 02:11:06,622 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 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 38 [2021-11-07 02:11:06,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:06,624 INFO L225 Difference]: With dead ends: 349 [2021-11-07 02:11:06,625 INFO L226 Difference]: Without dead ends: 349 [2021-11-07 02:11:06,626 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=216, Invalid=1344, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 02:11:06,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-11-07 02:11:06,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 168. [2021-11-07 02:11:06,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 153 states have (on average 1.4444444444444444) internal successors, (221), 167 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:06,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 221 transitions. [2021-11-07 02:11:06,634 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 221 transitions. Word has length 38 [2021-11-07 02:11:06,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:06,635 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 221 transitions. [2021-11-07 02:11:06,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:06,635 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 221 transitions. [2021-11-07 02:11:06,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 02:11:06,636 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:06,636 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:11:06,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:06,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-07 02:11:07,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:07,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:11:07,246 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-07 02:11:07,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:07,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1532397328, now seen corresponding path program 1 times [2021-11-07 02:11:07,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:11:07,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2090439263] [2021-11-07 02:11:07,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:07,247 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:11:07,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:11:07,248 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:11:07,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-07 02:11:07,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:07,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:11:07,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:08,132 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:11:08,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:08,701 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:11:08,701 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:08,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2090439263] [2021-11-07 02:11:08,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2090439263] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:11:08,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [890890990] [2021-11-07 02:11:08,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:08,702 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:11:08,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:11:08,704 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:11:08,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-07 02:11:09,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:09,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:11:09,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:09,830 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:11:09,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:09,990 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:11:09,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [890890990] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:11:09,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206270544] [2021-11-07 02:11:09,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:09,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:11:09,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:11:09,997 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:11:10,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-07 02:11:10,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:10,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:11:10,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:10,721 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 [2021-11-07 02:11:10,928 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-07 02:11:10,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:11,120 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-07 02:11:11,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206270544] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:11,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:11:11,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 11, 11, 11] total 23 [2021-11-07 02:11:11,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895401438] [2021-11-07 02:11:11,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:11:11,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:11,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:11:11,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-11-07 02:11:11,123 INFO L87 Difference]: Start difference. First operand 168 states and 221 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:11,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:11,374 INFO L93 Difference]: Finished difference Result 237 states and 308 transitions. [2021-11-07 02:11:11,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:11:11,375 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-07 02:11:11,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:11,376 INFO L225 Difference]: With dead ends: 237 [2021-11-07 02:11:11,376 INFO L226 Difference]: Without dead ends: 237 [2021-11-07 02:11:11,376 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 199 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-11-07 02:11:11,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-11-07 02:11:11,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 171. [2021-11-07 02:11:11,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 156 states have (on average 1.4423076923076923) internal successors, (225), 170 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:11,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 225 transitions. [2021-11-07 02:11:11,382 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 225 transitions. Word has length 38 [2021-11-07 02:11:11,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:11,382 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 225 transitions. [2021-11-07 02:11:11,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:11,383 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 225 transitions. [2021-11-07 02:11:11,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 02:11:11,383 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:11,384 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:11:11,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:11,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:11,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2021-11-07 02:11:11,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:11:11,999 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-07 02:11:11,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:11,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1005008516, now seen corresponding path program 1 times [2021-11-07 02:11:12,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:11:12,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1962485136] [2021-11-07 02:11:12,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:12,000 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:11:12,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:11:12,001 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:11:12,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-07 02:11:12,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:12,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:11:12,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:11:12,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:13,250 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:11:13,250 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:13,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1962485136] [2021-11-07 02:11:13,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1962485136] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:11:13,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1959691433] [2021-11-07 02:11:13,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:13,251 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:11:13,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:11:13,252 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:11:13,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-07 02:11:14,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:14,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:11:14,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:14,317 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:11:14,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:14,483 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:11:14,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1959691433] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:11:14,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216568359] [2021-11-07 02:11:14,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:14,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:11:14,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:11:14,485 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:11:14,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-07 02:11:15,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:15,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 02:11:15,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:15,292 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 8 treesize of output 7 [2021-11-07 02:11:15,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-07 02:11:15,939 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:11:15,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:17,806 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:11:17,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216568359] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:11:17,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:11:17,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 14, 15] total 41 [2021-11-07 02:11:17,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285447450] [2021-11-07 02:11:17,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-07 02:11:17,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:11:17,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-07 02:11:17,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=1235, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 02:11:17,809 INFO L87 Difference]: Start difference. First operand 171 states and 225 transitions. Second operand has 41 states, 41 states have (on average 2.658536585365854) internal successors, (109), 41 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:23,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:23,736 INFO L93 Difference]: Finished difference Result 302 states and 362 transitions. [2021-11-07 02:11:23,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 02:11:23,737 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.658536585365854) internal successors, (109), 41 states have internal predecessors, (109), 0 states have call successors, (0), 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 39 [2021-11-07 02:11:23,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:23,739 INFO L225 Difference]: With dead ends: 302 [2021-11-07 02:11:23,739 INFO L226 Difference]: Without dead ends: 302 [2021-11-07 02:11:23,740 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1053, Invalid=3237, Unknown=0, NotChecked=0, Total=4290 [2021-11-07 02:11:23,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-11-07 02:11:23,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 176. [2021-11-07 02:11:23,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 161 states have (on average 1.3975155279503106) internal successors, (225), 175 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:23,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 225 transitions. [2021-11-07 02:11:23,747 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 225 transitions. Word has length 39 [2021-11-07 02:11:23,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:23,747 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 225 transitions. [2021-11-07 02:11:23,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.658536585365854) internal successors, (109), 41 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:11:23,748 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 225 transitions. [2021-11-07 02:11:23,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 02:11:23,749 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:23,749 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:11:23,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2021-11-07 02:11:23,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:24,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-07 02:11:24,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:11:24,354 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-07 02:11:24,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:24,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1457295216, now seen corresponding path program 2 times [2021-11-07 02:11:24,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:11:24,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1863471956] [2021-11-07 02:11:24,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:11:24,355 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:11:24,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:11:24,355 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:11:24,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-07 02:11:25,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:11:25,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:11:25,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 02:11:25,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:25,152 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 [2021-11-07 02:11:25,157 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 [2021-11-07 02:11:25,622 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 02:11:25,623 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 16 treesize of output 16 [2021-11-07 02:11:25,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-07 02:11:25,792 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 02:11:25,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-11-07 02:11:25,801 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 02:11:25,801 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 20 treesize of output 20 [2021-11-07 02:11:25,849 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-07 02:11:25,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:26,808 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-07 02:11:26,808 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 46 treesize of output 45 [2021-11-07 02:11:38,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2021-11-07 02:11:38,549 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-07 02:11:38,550 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:11:38,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1863471956] [2021-11-07 02:11:38,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1863471956] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:11:38,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1017834202] [2021-11-07 02:11:38,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:11:38,550 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:11:38,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:11:38,551 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:11:38,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-07 02:11:39,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:11:39,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:11:39,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 02:11:39,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:39,785 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 [2021-11-07 02:11:39,791 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 [2021-11-07 02:11:40,352 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 02:11:40,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-11-07 02:11:40,364 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 02:11:40,365 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 20 treesize of output 20 [2021-11-07 02:11:40,477 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 02:11:40,477 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 27 treesize of output 29 [2021-11-07 02:11:40,489 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 02:11:40,489 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 21 treesize of output 21 [2021-11-07 02:11:40,533 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-07 02:11:40,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:11:43,058 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-07 02:11:43,058 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 46 treesize of output 45 [2021-11-07 02:11:54,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2021-11-07 02:11:54,397 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-07 02:11:54,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1017834202] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:11:54,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534675555] [2021-11-07 02:11:54,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:11:54,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:11:54,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:11:54,398 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:11:54,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-07 02:11:55,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:11:55,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:11:55,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 02:11:55,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:11:55,410 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 [2021-11-07 02:11:55,421 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 [2021-11-07 02:11:56,066 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 02:11:56,067 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 33 treesize of output 35 [2021-11-07 02:11:56,103 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-07 02:11:56,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 34 [2021-11-07 02:11:56,585 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 02:11:56,586 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 52 treesize of output 54 [2021-11-07 02:11:56,618 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-07 02:11:56,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 48 [2021-11-07 02:11:56,658 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-07 02:11:56,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:14,191 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 02:12:14,191 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 125 treesize of output 121 [2021-11-07 02:12:14,220 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-07 02:12:14,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534675555] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:12:14,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:12:14,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8, 9, 8, 8] total 22 [2021-11-07 02:12:14,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244659942] [2021-11-07 02:12:14,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 02:12:14,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:12:14,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 02:12:14,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=407, Unknown=9, NotChecked=0, Total=506 [2021-11-07 02:12:14,223 INFO L87 Difference]: Start difference. First operand 176 states and 225 transitions. Second operand has 23 states, 22 states have (on average 3.0) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:28,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:28,487 INFO L93 Difference]: Finished difference Result 589 states and 759 transitions. [2021-11-07 02:12:28,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 02:12:28,489 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.0) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 02:12:28,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:28,492 INFO L225 Difference]: With dead ends: 589 [2021-11-07 02:12:28,492 INFO L226 Difference]: Without dead ends: 589 [2021-11-07 02:12:28,493 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 257 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 39.9s TimeCoverageRelationStatistics Valid=267, Invalid=914, Unknown=9, NotChecked=0, Total=1190 [2021-11-07 02:12:28,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-11-07 02:12:28,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 229. [2021-11-07 02:12:28,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 214 states have (on average 1.3925233644859814) internal successors, (298), 228 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:28,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 298 transitions. [2021-11-07 02:12:28,502 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 298 transitions. Word has length 48 [2021-11-07 02:12:28,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:28,503 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 298 transitions. [2021-11-07 02:12:28,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.0) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:28,503 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 298 transitions. [2021-11-07 02:12:28,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 02:12:28,504 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:28,504 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:12:28,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:28,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:28,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:29,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:12:29,128 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-07 02:12:29,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:29,129 INFO L85 PathProgramCache]: Analyzing trace with hash 2092339098, now seen corresponding path program 1 times [2021-11-07 02:12:29,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:29,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [692802339] [2021-11-07 02:12:29,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:29,129 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:29,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:29,130 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:29,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-07 02:12:30,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:30,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:12:30,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-07 02:12:30,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:12:30,413 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-07 02:12:30,414 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:12:30,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [692802339] [2021-11-07 02:12:30,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [692802339] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:12:30,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:12:30,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:12:30,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502839319] [2021-11-07 02:12:30,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:12:30,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:12:30,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:12:30,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:12:30,416 INFO L87 Difference]: Start difference. First operand 229 states and 298 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:30,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:12:30,505 INFO L93 Difference]: Finished difference Result 240 states and 304 transitions. [2021-11-07 02:12:30,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:12:30,506 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 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 [2021-11-07 02:12:30,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:12:30,508 INFO L225 Difference]: With dead ends: 240 [2021-11-07 02:12:30,508 INFO L226 Difference]: Without dead ends: 240 [2021-11-07 02:12:30,508 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:12:30,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-11-07 02:12:30,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 235. [2021-11-07 02:12:30,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 220 states have (on average 1.3818181818181818) internal successors, (304), 234 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:30,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 304 transitions. [2021-11-07 02:12:30,519 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 304 transitions. Word has length 48 [2021-11-07 02:12:30,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:12:30,520 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 304 transitions. [2021-11-07 02:12:30,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:12:30,520 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 304 transitions. [2021-11-07 02:12:30,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 02:12:30,521 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:12:30,521 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:12:30,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-07 02:12:30,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:12:30,733 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-07 02:12:30,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:12:30,733 INFO L85 PathProgramCache]: Analyzing trace with hash 2092340542, now seen corresponding path program 1 times [2021-11-07 02:12:30,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:12:30,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627113876] [2021-11-07 02:12:30,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:12:30,734 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:12:30,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:12:30,736 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:12:30,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-07 02:12:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:12:31,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 02:12:31,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:12:31,919 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 15 treesize of output 11 [2021-11-07 02:12:32,030 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-07 02:12:32,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-07 02:12:32,216 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-11-07 02:12:32,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 42 [2021-11-07 02:12:32,460 INFO L354 Elim1Store]: treesize reduction 171, result has 17.8 percent of original size [2021-11-07 02:12:32,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 57 [2021-11-07 02:12:32,769 INFO L354 Elim1Store]: treesize reduction 264, result has 15.7 percent of original size [2021-11-07 02:12:32,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 64 treesize of output 72 [2021-11-07 02:12:33,160 INFO L354 Elim1Store]: treesize reduction 375, result has 14.0 percent of original size [2021-11-07 02:12:33,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 76 treesize of output 87 [2021-11-07 02:12:33,727 INFO L354 Elim1Store]: treesize reduction 344, result has 13.4 percent of original size [2021-11-07 02:12:33,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 68 treesize of output 82 [2021-11-07 02:12:34,336 INFO L354 Elim1Store]: treesize reduction 444, result has 12.3 percent of original size [2021-11-07 02:12:34,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 77 treesize of output 94 [2021-11-07 02:12:35,083 INFO L354 Elim1Store]: treesize reduction 556, result has 11.3 percent of original size [2021-11-07 02:12:35,083 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 36 case distinctions, treesize of input 86 treesize of output 106 [2021-11-07 02:12:35,982 INFO L354 Elim1Store]: treesize reduction 644, result has 11.0 percent of original size [2021-11-07 02:12:35,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 93 treesize of output 116 [2021-11-07 02:12:37,584 INFO L354 Elim1Store]: treesize reduction 522, result has 0.2 percent of original size [2021-11-07 02:12:37,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 96 treesize of output 34 [2021-11-07 02:12:37,761 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:12:37,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:24,739 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 86 treesize of output 84 [2021-11-07 02:15:24,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 191 [2021-11-07 02:15:25,380 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 126 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:25,380 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:25,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627113876] [2021-11-07 02:15:25,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [627113876] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:15:25,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1515312228] [2021-11-07 02:15:25,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:25,380 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:15:25,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:15:25,382 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:15:25,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2021-11-07 02:15:26,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:26,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 02:15:26,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:27,366 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 15 treesize of output 11 [2021-11-07 02:15:27,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:27,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-07 02:15:28,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:28,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:28,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:28,011 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:28,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2021-11-07 02:15:28,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:28,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:28,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:28,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:28,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:28,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:28,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:28,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 46 [2021-11-07 02:15:28,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:28,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:28,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:28,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:28,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:28,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:28,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:28,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:28,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:28,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:28,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:28,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 61 [2021-11-07 02:15:29,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:29,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:29,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:29,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:29,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:29,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:29,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:29,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:29,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:29,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:29,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:29,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:29,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:29,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:29,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:29,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:29,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 65 treesize of output 76 [2021-11-07 02:15:29,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:29,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:29,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:29,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:29,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:29,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:29,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:29,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:29,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:29,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:29,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:29,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:29,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:29,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:29,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:29,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:29,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:29,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:29,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:29,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:29,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:29,851 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:29,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 68 treesize of output 82 [2021-11-07 02:15:30,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:30,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 77 treesize of output 94 [2021-11-07 02:15:30,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:30,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:31,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 86 treesize of output 106 [2021-11-07 02:15:31,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:31,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:31,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 45 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2021-11-07 02:15:33,345 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:33,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 78 treesize of output 34 [2021-11-07 02:15:33,350 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:33,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:33,655 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 86 treesize of output 84 [2021-11-07 02:15:33,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 191 [2021-11-07 02:15:33,756 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 126 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:33,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1515312228] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:15:33,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583952855] [2021-11-07 02:15:33,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:33,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:15:33,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:15:33,757 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:15:33,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-07 02:15:35,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:35,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 02:15:35,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:35,357 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 [2021-11-07 02:15:36,025 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 15 treesize of output 11 [2021-11-07 02:15:36,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:36,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-07 02:15:36,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 02:15:36,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:36,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:36,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:36,904 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:36,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-07 02:15:37,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:37,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:37,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:37,223 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-07 02:15:37,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 46 [2021-11-07 02:15:37,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:37,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:37,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:37,580 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-07 02:15:37,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 46 [2021-11-07 02:15:38,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:38,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:38,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:38,062 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-07 02:15:38,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 46 [2021-11-07 02:15:38,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:38,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:38,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:38,448 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-07 02:15:38,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 46 [2021-11-07 02:15:38,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:38,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:38,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:38,888 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-07 02:15:38,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 46 [2021-11-07 02:15:39,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:39,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:39,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:39,354 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-07 02:15:39,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 46 [2021-11-07 02:15:39,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:39,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:39,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:15:39,735 INFO L354 Elim1Store]: treesize reduction 84, result has 23.6 percent of original size [2021-11-07 02:15:39,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 46 [2021-11-07 02:15:40,660 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:15:40,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 13 [2021-11-07 02:15:40,664 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-07 02:15:40,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:00,263 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 30 treesize of output 28 [2021-11-07 02:21:00,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2021-11-07 02:21:00,977 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 49 proven. 19 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-07 02:21:00,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583952855] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:21:00,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:21:00,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 25, 23, 12, 9] total 82 [2021-11-07 02:21:00,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719977791] [2021-11-07 02:21:00,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-07 02:21:00,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:00,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-07 02:21:00,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1453, Invalid=5353, Unknown=0, NotChecked=0, Total=6806 [2021-11-07 02:21:00,983 INFO L87 Difference]: Start difference. First operand 235 states and 304 transitions. Second operand has 83 states, 82 states have (on average 2.1219512195121952) internal successors, (174), 83 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:15,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:15,666 INFO L93 Difference]: Finished difference Result 412 states and 496 transitions. [2021-11-07 02:21:15,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-07 02:21:15,668 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 2.1219512195121952) internal successors, (174), 83 states have internal predecessors, (174), 0 states have call successors, (0), 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 [2021-11-07 02:21:15,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:15,670 INFO L225 Difference]: With dead ends: 412 [2021-11-07 02:21:15,670 INFO L226 Difference]: Without dead ends: 412 [2021-11-07 02:21:15,675 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 187 SyntacticMatches, 14 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6502 ImplicationChecksByTransitivity, 504.6s TimeCoverageRelationStatistics Valid=3017, Invalid=13495, Unknown=0, NotChecked=0, Total=16512 [2021-11-07 02:21:15,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-11-07 02:21:15,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 246. [2021-11-07 02:21:15,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 231 states have (on average 1.3766233766233766) internal successors, (318), 245 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:15,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 318 transitions. [2021-11-07 02:21:15,685 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 318 transitions. Word has length 48 [2021-11-07 02:21:15,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:15,685 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 318 transitions. [2021-11-07 02:21:15,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 2.1219512195121952) internal successors, (174), 83 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:15,686 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 318 transitions. [2021-11-07 02:21:15,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 02:21:15,687 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:15,687 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:21:15,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:15,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:16,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:16,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:16,295 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-07 02:21:16,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:16,295 INFO L85 PathProgramCache]: Analyzing trace with hash 438047492, now seen corresponding path program 1 times [2021-11-07 02:21:16,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:16,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [295428018] [2021-11-07 02:21:16,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:16,296 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:16,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:16,297 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:16,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-07 02:21:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:17,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 02:21:17,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:17,590 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 15 treesize of output 11 [2021-11-07 02:21:17,700 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-07 02:21:17,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-07 02:21:17,897 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-07 02:21:17,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-11-07 02:21:18,175 INFO L354 Elim1Store]: treesize reduction 116, result has 18.3 percent of original size [2021-11-07 02:21:18,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 46 [2021-11-07 02:21:18,563 INFO L354 Elim1Store]: treesize reduction 180, result has 16.3 percent of original size [2021-11-07 02:21:18,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 50 treesize of output 58 [2021-11-07 02:21:19,134 INFO L354 Elim1Store]: treesize reduction 277, result has 14.5 percent of original size [2021-11-07 02:21:19,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 73 [2021-11-07 02:21:19,658 INFO L354 Elim1Store]: treesize reduction 392, result has 13.1 percent of original size [2021-11-07 02:21:19,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 74 treesize of output 88 [2021-11-07 02:21:20,319 INFO L354 Elim1Store]: treesize reduction 525, result has 11.9 percent of original size [2021-11-07 02:21:20,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 86 treesize of output 103 [2021-11-07 02:21:21,124 INFO L354 Elim1Store]: treesize reduction 676, result has 10.9 percent of original size [2021-11-07 02:21:21,124 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 36 case distinctions, treesize of input 98 treesize of output 118 [2021-11-07 02:21:22,195 INFO L354 Elim1Store]: treesize reduction 644, result has 11.0 percent of original size [2021-11-07 02:21:22,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 93 treesize of output 116 [2021-11-07 02:21:23,984 INFO L354 Elim1Store]: treesize reduction 522, result has 0.2 percent of original size [2021-11-07 02:21:23,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 96 treesize of output 34 [2021-11-07 02:21:24,106 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:24,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:35,879 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 86 treesize of output 84 [2021-11-07 02:21:35,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23530 treesize of output 23528 [2021-11-07 02:21:38,528 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 126 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:38,528 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:38,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [295428018] [2021-11-07 02:21:38,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [295428018] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:21:38,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1536442658] [2021-11-07 02:21:38,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:38,529 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:21:38,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:21:38,530 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:21:38,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2021-11-07 02:21:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:40,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-07 02:21:40,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:41,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-07 02:21:41,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:41,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-07 02:21:41,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:41,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:41,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:41,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-11-07 02:21:42,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:42,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:42,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:42,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:42,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:42,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:42,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2021-11-07 02:21:43,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:43,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:43,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:43,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:43,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:43,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:43,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:43,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:43,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:43,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:43,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 61 [2021-11-07 02:21:43,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:43,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:43,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:43,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:43,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:43,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:43,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:43,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:43,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:43,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:43,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:43,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:43,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:43,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:43,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:43,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 16 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 76 [2021-11-07 02:21:44,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:44,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:44,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:44,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:44,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:44,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:44,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:44,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:44,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:44,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:44,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:44,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:44,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:44,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:44,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:44,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:44,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:44,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:44,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:44,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:44,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:44,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 22 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 82 [2021-11-07 02:21:45,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:45,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:45,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:45,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:45,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:45,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:45,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:45,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:45,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:45,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:45,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:45,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:45,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:45,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:45,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:45,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:45,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:45,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:45,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:45,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:45,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:45,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:45,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:45,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:45,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:45,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:45,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:45,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:45,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 29 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 94 [2021-11-07 02:21:45,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 37 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 106 [2021-11-07 02:21:46,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:46,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:47,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:47,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:47,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:47,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:47,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:47,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:47,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:47,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:47,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:47,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:47,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:47,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:47,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:47,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:47,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:47,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:47,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:47,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:47,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:47,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:47,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:47,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:47,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:47,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:47,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:47,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:47,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:47,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:47,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 46 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 116 [2021-11-07 02:21:49,079 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:21:49,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 85 treesize of output 41 [2021-11-07 02:21:49,483 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:49,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:49,934 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 86 treesize of output 84 [2021-11-07 02:21:49,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23532 treesize of output 23530 [2021-11-07 02:21:51,151 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 126 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:51,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1536442658] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:21:51,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194928675] [2021-11-07 02:21:51,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:51,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:21:51,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:21:51,153 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:21:51,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-07 02:21:52,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:52,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-07 02:21:52,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:53,117 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 [2021-11-07 02:21:53,968 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 15 treesize of output 11 [2021-11-07 02:21:54,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:54,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-07 02:21:55,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:55,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:55,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:55,058 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:21:55,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2021-11-07 02:21:55,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-07 02:21:55,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:55,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:55,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:55,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:55,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:55,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:55,772 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:21:55,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 57 [2021-11-07 02:21:56,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:56,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:56,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:56,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:56,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:56,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:56,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:56,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:56,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:56,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:56,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:21:56,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 72 [2021-11-07 02:21:57,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:57,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:57,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:57,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:57,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:57,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:57,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:57,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:57,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:57,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:57,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:57,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:57,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:57,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:57,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:57,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:21:57,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 70 [2021-11-07 02:21:57,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:57,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:21:58,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 71 treesize of output 85 [2021-11-07 02:21:58,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:58,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:21:58,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 83 treesize of output 100 [2021-11-07 02:21:59,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:59,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:59,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:59,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:59,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:59,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:59,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:59,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:59,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:59,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:59,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:59,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:59,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:59,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:59,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:59,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:59,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:59,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:59,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:59,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:59,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:59,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:59,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:59,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:59,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:59,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:59,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:59,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:59,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:59,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:59,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:59,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:59,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:59,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:59,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:59,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:21:59,775 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:21:59,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 115 [2021-11-07 02:22:00,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:00,846 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:22:00,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 45 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 116 [2021-11-07 02:22:02,686 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:22:02,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 45 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 78 treesize of output 34 [2021-11-07 02:22:02,699 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:02,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:06,985 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 86 treesize of output 84 [2021-11-07 02:22:07,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22510 treesize of output 22508 [2021-11-07 02:22:09,363 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 126 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:09,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194928675] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:22:09,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:22:09,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 25, 24, 26, 26] total 102 [2021-11-07 02:22:09,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838989494] [2021-11-07 02:22:09,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-11-07 02:22:09,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:09,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-11-07 02:22:09,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2252, Invalid=8254, Unknown=0, NotChecked=0, Total=10506 [2021-11-07 02:22:09,370 INFO L87 Difference]: Start difference. First operand 246 states and 318 transitions. Second operand has 103 states, 102 states have (on average 1.9803921568627452) internal successors, (202), 103 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:30,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:30,482 INFO L93 Difference]: Finished difference Result 480 states and 588 transitions. [2021-11-07 02:22:30,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-07 02:22:30,483 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 102 states have (on average 1.9803921568627452) internal successors, (202), 103 states have internal predecessors, (202), 0 states have call successors, (0), 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 49 [2021-11-07 02:22:30,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:30,486 INFO L225 Difference]: With dead ends: 480 [2021-11-07 02:22:30,486 INFO L226 Difference]: Without dead ends: 480 [2021-11-07 02:22:30,495 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8292 ImplicationChecksByTransitivity, 43.9s TimeCoverageRelationStatistics Valid=3856, Invalid=17606, Unknown=0, NotChecked=0, Total=21462 [2021-11-07 02:22:30,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-11-07 02:22:30,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 246. [2021-11-07 02:22:30,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 232 states have (on average 1.3620689655172413) internal successors, (316), 245 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:30,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 316 transitions. [2021-11-07 02:22:30,504 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 316 transitions. Word has length 49 [2021-11-07 02:22:30,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:30,505 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 316 transitions. [2021-11-07 02:22:30,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 102 states have (on average 1.9803921568627452) internal successors, (202), 103 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:30,506 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 316 transitions. [2021-11-07 02:22:30,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 02:22:30,506 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:30,507 INFO L513 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:30,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:30,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:30,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:31,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:31,115 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-07 02:22:31,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:31,115 INFO L85 PathProgramCache]: Analyzing trace with hash -536280630, now seen corresponding path program 3 times [2021-11-07 02:22:31,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:31,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1643111488] [2021-11-07 02:22:31,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:22:31,116 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:31,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:31,117 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:31,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-07 02:22:33,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-07 02:22:33,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:22:33,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 02:22:33,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:34,102 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 134 proven. 145 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 02:22:34,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:34,911 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 134 proven. 145 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-07 02:22:34,911 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:34,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1643111488] [2021-11-07 02:22:34,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1643111488] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:22:34,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1547721932] [2021-11-07 02:22:34,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:22:34,912 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:22:34,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:22:34,913 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:22:34,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2021-11-07 02:22:37,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-07 02:22:37,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:22:37,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-07 02:22:37,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:37,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-07 02:22:39,767 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 105 proven. 187 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 02:22:39,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:03,352 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:03,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1547721932] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:23:03,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076799131] [2021-11-07 02:23:03,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:23:03,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:23:03,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:23:03,353 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:23:03,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a542fdc-0126-4e88-a4cd-9ee3538b361a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process