./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 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 143a30a80a62e6cad7506820b1f96be933051e37975b620c656decb608437802 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:35:42,343 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:35:42,346 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:35:42,382 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:35:42,383 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:35:42,384 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:35:42,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:35:42,394 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:35:42,401 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:35:42,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:35:42,404 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:35:42,407 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:35:42,408 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:35:42,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:35:42,411 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:35:42,413 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:35:42,414 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:35:42,415 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:35:42,418 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:35:42,421 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:35:42,423 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:35:42,429 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:35:42,431 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:35:42,432 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:35:42,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:35:42,446 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:35:42,447 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:35:42,448 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:35:42,450 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:35:42,452 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:35:42,453 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:35:42,455 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:35:42,456 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:35:42,458 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:35:42,461 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:35:42,461 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:35:42,462 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:35:42,462 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:35:42,463 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:35:42,464 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:35:42,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:35:42,466 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-20 07:35:42,509 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:35:42,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:35:42,510 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:35:42,511 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:35:42,511 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:35:42,512 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:35:42,512 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:35:42,513 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:35:42,513 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:35:42,513 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:35:42,513 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:35:42,514 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 07:35:42,514 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:35:42,514 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:35:42,514 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:35:42,515 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 07:35:42,515 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 07:35:42,515 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 07:35:42,515 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:35:42,516 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 07:35:42,516 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:35:42,516 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:35:42,516 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:35:42,517 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:35:42,517 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:35:42,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:35:42,517 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:35:42,517 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:35:42,518 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:35:42,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:35:42,518 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:35:42,518 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 143a30a80a62e6cad7506820b1f96be933051e37975b620c656decb608437802 [2021-11-20 07:35:42,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:35:42,824 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:35:42,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:35:42,831 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:35:42,832 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:35:42,833 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-1.i [2021-11-20 07:35:42,933 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/data/6ed2b91fa/b658ebcd88494942a58ec1ba2a950cd4/FLAG3352545a5 [2021-11-20 07:35:43,475 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:35:43,475 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-1.i [2021-11-20 07:35:43,490 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/data/6ed2b91fa/b658ebcd88494942a58ec1ba2a950cd4/FLAG3352545a5 [2021-11-20 07:35:43,744 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/data/6ed2b91fa/b658ebcd88494942a58ec1ba2a950cd4 [2021-11-20 07:35:43,747 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:35:43,748 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:35:43,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:35:43,761 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:35:43,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:35:43,766 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:35:43" (1/1) ... [2021-11-20 07:35:43,767 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dee95c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:35:43, skipping insertion in model container [2021-11-20 07:35:43,768 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:35:43" (1/1) ... [2021-11-20 07:35:43,775 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:35:43,831 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:35:44,279 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:35:44,298 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) [2021-11-20 07:35:44,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@11dffd75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:35:44, skipping insertion in model container [2021-11-20 07:35:44,299 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:35:44,299 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-20 07:35:44,301 INFO L158 Benchmark]: Toolchain (without parser) took 551.65ms. Allocated memory is still 92.3MB. Free memory was 49.9MB in the beginning and 62.1MB in the end (delta: -12.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-20 07:35:44,302 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 92.3MB. Free memory was 67.7MB in the beginning and 67.6MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 07:35:44,302 INFO L158 Benchmark]: CACSL2BoogieTranslator took 537.80ms. Allocated memory is still 92.3MB. Free memory was 49.7MB in the beginning and 62.1MB in the end (delta: -12.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-20 07:35:44,304 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 92.3MB. Free memory was 67.7MB in the beginning and 67.6MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 537.80ms. Allocated memory is still 92.3MB. Free memory was 49.7MB in the beginning and 62.1MB in the end (delta: -12.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * 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_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 143a30a80a62e6cad7506820b1f96be933051e37975b620c656decb608437802 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:35:46,580 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:35:46,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:35:46,636 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:35:46,636 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:35:46,640 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:35:46,643 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:35:46,649 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:35:46,652 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:35:46,658 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:35:46,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:35:46,661 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:35:46,662 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:35:46,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:35:46,667 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:35:46,672 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:35:46,673 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:35:46,674 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:35:46,677 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:35:46,679 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:35:46,681 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:35:46,683 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:35:46,685 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:35:46,687 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:35:46,694 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:35:46,699 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:35:46,699 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:35:46,700 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:35:46,702 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:35:46,703 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:35:46,704 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:35:46,705 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:35:46,707 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:35:46,708 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:35:46,719 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:35:46,719 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:35:46,720 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:35:46,721 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:35:46,721 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:35:46,723 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:35:46,724 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:35:46,729 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-20 07:35:46,755 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:35:46,755 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:35:46,756 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:35:46,756 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:35:46,757 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:35:46,757 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:35:46,758 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:35:46,758 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:35:46,758 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:35:46,758 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:35:46,759 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:35:46,759 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 07:35:46,759 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:35:46,759 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:35:46,760 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:35:46,760 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 07:35:46,760 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 07:35:46,760 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 07:35:46,761 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:35:46,761 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 07:35:46,761 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 07:35:46,761 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 07:35:46,761 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:35:46,762 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:35:46,762 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:35:46,762 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:35:46,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:35:46,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:35:46,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:35:46,763 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:35:46,763 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-20 07:35:46,764 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 07:35:46,764 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:35:46,764 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 07:35:46,764 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_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 143a30a80a62e6cad7506820b1f96be933051e37975b620c656decb608437802 [2021-11-20 07:35:47,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:35:47,137 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:35:47,141 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:35:47,144 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:35:47,145 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:35:47,146 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-1.i [2021-11-20 07:35:47,213 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/data/9f0537833/60724c987e8e428b8bbdf384cb417567/FLAG1b126747d [2021-11-20 07:35:47,952 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:35:47,953 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-1.i [2021-11-20 07:35:47,970 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/data/9f0537833/60724c987e8e428b8bbdf384cb417567/FLAG1b126747d [2021-11-20 07:35:48,149 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/data/9f0537833/60724c987e8e428b8bbdf384cb417567 [2021-11-20 07:35:48,151 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:35:48,154 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:35:48,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:35:48,162 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:35:48,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:35:48,167 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:35:48" (1/1) ... [2021-11-20 07:35:48,168 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ce8c651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:35:48, skipping insertion in model container [2021-11-20 07:35:48,168 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:35:48" (1/1) ... [2021-11-20 07:35:48,180 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:35:48,258 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:35:48,822 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:35:48,847 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-20 07:35:48,863 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:35:48,939 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:35:48,958 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:35:49,036 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:35:49,099 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:35:49,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:35:49 WrapperNode [2021-11-20 07:35:49,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:35:49,101 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:35:49,101 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:35:49,101 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:35:49,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:35:49" (1/1) ... [2021-11-20 07:35:49,160 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:35:49" (1/1) ... [2021-11-20 07:35:49,181 INFO L137 Inliner]: procedures = 167, calls = 78, calls flagged for inlining = 23, calls inlined = 5, statements flattened = 86 [2021-11-20 07:35:49,197 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:35:49,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:35:49,198 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:35:49,198 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:35:49,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:35:49" (1/1) ... [2021-11-20 07:35:49,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:35:49" (1/1) ... [2021-11-20 07:35:49,210 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:35:49" (1/1) ... [2021-11-20 07:35:49,210 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:35:49" (1/1) ... [2021-11-20 07:35:49,219 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:35:49" (1/1) ... [2021-11-20 07:35:49,223 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:35:49" (1/1) ... [2021-11-20 07:35:49,225 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:35:49" (1/1) ... [2021-11-20 07:35:49,229 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:35:49,230 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:35:49,230 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:35:49,230 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:35:49,230 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:35:49" (1/1) ... [2021-11-20 07:35:49,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:35:49,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:35:49,274 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:35:49,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:35:49,341 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-20 07:35:49,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-20 07:35:49,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 07:35:49,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:35:49,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 07:35:49,345 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 07:35:49,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 07:35:49,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 07:35:49,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:35:49,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:35:49,475 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:35:49,477 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:35:49,864 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:35:49,871 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:35:49,872 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-20 07:35:49,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:35:49 BoogieIcfgContainer [2021-11-20 07:35:49,874 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:35:49,876 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:35:49,876 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:35:49,879 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:35:49,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:35:48" (1/3) ... [2021-11-20 07:35:49,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46a6bfa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:35:49, skipping insertion in model container [2021-11-20 07:35:49,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:35:49" (2/3) ... [2021-11-20 07:35:49,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46a6bfa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:35:49, skipping insertion in model container [2021-11-20 07:35:49,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:35:49" (3/3) ... [2021-11-20 07:35:49,882 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test17_2-1.i [2021-11-20 07:35:49,887 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:35:49,887 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2021-11-20 07:35:49,932 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:35:49,939 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 [2021-11-20 07:35:49,939 INFO L340 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2021-11-20 07:35:49,955 INFO L276 IsEmpty]: Start isEmpty. Operand has 60 states, 38 states have (on average 1.763157894736842) internal successors, (67), 56 states have internal predecessors, (67), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:35:49,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 07:35:49,963 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:35:49,964 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:35:49,964 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)] === [2021-11-20 07:35:49,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:49,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1738627285, now seen corresponding path program 1 times [2021-11-20 07:35:50,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:35:50,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [631566642] [2021-11-20 07:35:50,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:50,007 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:35:50,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:35:50,012 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:35:50,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 07:35:50,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:50,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 07:35:50,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:35:50,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:35:50,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:35:50,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:35:50,344 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:35:50,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [631566642] [2021-11-20 07:35:50,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [631566642] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:35:50,346 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:35:50,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 07:35:50,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93598302] [2021-11-20 07:35:50,349 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:35:50,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:35:50,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:35:50,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:35:50,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:35:50,390 INFO L87 Difference]: Start difference. First operand has 60 states, 38 states have (on average 1.763157894736842) internal successors, (67), 56 states have internal predecessors, (67), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 07:35:50,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:35:50,549 INFO L93 Difference]: Finished difference Result 114 states and 129 transitions. [2021-11-20 07:35:50,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:35:50,552 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-20 07:35:50,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:35:50,562 INFO L225 Difference]: With dead ends: 114 [2021-11-20 07:35:50,562 INFO L226 Difference]: Without dead ends: 110 [2021-11-20 07:35:50,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:35:50,568 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 55 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:35:50,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 234 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:35:50,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-20 07:35:50,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 62. [2021-11-20 07:35:50,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 40 states have (on average 1.6) internal successors, (64), 57 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 07:35:50,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2021-11-20 07:35:50,613 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 11 [2021-11-20 07:35:50,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:35:50,614 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2021-11-20 07:35:50,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 07:35:50,614 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2021-11-20 07:35:50,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 07:35:50,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:35:50,616 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:35:50,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:35:50,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:35:50,830 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-20 07:35:50,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:50,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1738628211, now seen corresponding path program 1 times [2021-11-20 07:35:50,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:35:50,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [118288615] [2021-11-20 07:35:50,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:50,832 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:35:50,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:35:50,834 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:35:50,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 07:35:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:50,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 07:35:50,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:35:50,957 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 [2021-11-20 07:35:51,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:35:51,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:35:51,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:35:51,122 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:35:51,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [118288615] [2021-11-20 07:35:51,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [118288615] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:35:51,123 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:35:51,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-20 07:35:51,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223641434] [2021-11-20 07:35:51,123 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:35:51,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:35:51,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:35:51,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:35:51,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:35:51,126 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 07:35:51,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:35:51,384 INFO L93 Difference]: Finished difference Result 97 states and 111 transitions. [2021-11-20 07:35:51,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:35:51,386 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-20 07:35:51,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:35:51,387 INFO L225 Difference]: With dead ends: 97 [2021-11-20 07:35:51,388 INFO L226 Difference]: Without dead ends: 97 [2021-11-20 07:35:51,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:35:51,389 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 35 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:35:51,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 158 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:35:51,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-20 07:35:51,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 75. [2021-11-20 07:35:51,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 53 states have (on average 1.5849056603773586) internal successors, (84), 70 states have internal predecessors, (84), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 07:35:51,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2021-11-20 07:35:51,411 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 11 [2021-11-20 07:35:51,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:35:51,412 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2021-11-20 07:35:51,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 07:35:51,412 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2021-11-20 07:35:51,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 07:35:51,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:35:51,413 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:35:51,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:35:51,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:35:51,616 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-20 07:35:51,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:51,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1738628210, now seen corresponding path program 1 times [2021-11-20 07:35:51,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:35:51,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [856158097] [2021-11-20 07:35:51,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:51,618 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:35:51,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:35:51,635 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:35:51,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 07:35:51,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:51,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 07:35:51,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:35:51,759 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 [2021-11-20 07:35:51,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:35:51,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:35:52,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:35:52,687 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:35:52,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [856158097] [2021-11-20 07:35:52,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [856158097] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:35:52,687 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:35:52,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-11-20 07:35:52,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111887364] [2021-11-20 07:35:52,688 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:35:52,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 07:35:52,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:35:52,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 07:35:52,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:35:52,689 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 14 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:35:53,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:35:53,893 INFO L93 Difference]: Finished difference Result 174 states and 205 transitions. [2021-11-20 07:35:53,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:35:53,893 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 11 [2021-11-20 07:35:53,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:35:53,895 INFO L225 Difference]: With dead ends: 174 [2021-11-20 07:35:53,896 INFO L226 Difference]: Without dead ends: 174 [2021-11-20 07:35:53,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:35:53,898 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 248 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:35:53,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 544 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 226 Invalid, 0 Unknown, 92 Unchecked, 0.8s Time] [2021-11-20 07:35:53,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-20 07:35:53,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 108. [2021-11-20 07:35:53,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 86 states have (on average 1.569767441860465) internal successors, (135), 103 states have internal predecessors, (135), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 07:35:53,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 141 transitions. [2021-11-20 07:35:53,911 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 141 transitions. Word has length 11 [2021-11-20 07:35:53,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:35:53,911 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 141 transitions. [2021-11-20 07:35:53,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:35:53,912 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 141 transitions. [2021-11-20 07:35:53,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 07:35:53,912 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:35:53,912 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:35:53,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:35:54,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:35:54,124 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-20 07:35:54,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:54,125 INFO L85 PathProgramCache]: Analyzing trace with hash -851123604, now seen corresponding path program 1 times [2021-11-20 07:35:54,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:35:54,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [773050374] [2021-11-20 07:35:54,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:54,126 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:35:54,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:35:54,128 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:35:54,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 07:35:54,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:54,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 07:35:54,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:35:54,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:35:54,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:35:54,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:35:54,271 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:35:54,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [773050374] [2021-11-20 07:35:54,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [773050374] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:35:54,272 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:35:54,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 07:35:54,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395977624] [2021-11-20 07:35:54,273 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:35:54,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:35:54,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:35:54,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:35:54,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:35:54,274 INFO L87 Difference]: Start difference. First operand 108 states and 141 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 07:35:54,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:35:54,411 INFO L93 Difference]: Finished difference Result 151 states and 189 transitions. [2021-11-20 07:35:54,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:35:54,412 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-20 07:35:54,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:35:54,414 INFO L225 Difference]: With dead ends: 151 [2021-11-20 07:35:54,414 INFO L226 Difference]: Without dead ends: 149 [2021-11-20 07:35:54,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:35:54,418 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 46 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:35:54,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 162 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:35:54,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-20 07:35:54,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 108. [2021-11-20 07:35:54,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 86 states have (on average 1.558139534883721) internal successors, (134), 103 states have internal predecessors, (134), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 07:35:54,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 140 transitions. [2021-11-20 07:35:54,430 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 140 transitions. Word has length 11 [2021-11-20 07:35:54,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:35:54,430 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 140 transitions. [2021-11-20 07:35:54,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 07:35:54,431 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 140 transitions. [2021-11-20 07:35:54,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 07:35:54,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:35:54,431 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:35:54,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:35:54,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:35:54,637 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-20 07:35:54,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:54,638 INFO L85 PathProgramCache]: Analyzing trace with hash -851124530, now seen corresponding path program 1 times [2021-11-20 07:35:54,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:35:54,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [869401109] [2021-11-20 07:35:54,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:54,640 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:35:54,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:35:54,641 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:35:54,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 07:35:54,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:54,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:35:54,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:35:54,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:35:54,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:35:54,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:35:54,862 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:35:54,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [869401109] [2021-11-20 07:35:54,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [869401109] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:35:54,862 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:35:54,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 07:35:54,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372094268] [2021-11-20 07:35:54,863 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:35:54,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:35:54,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:35:54,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:35:54,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:35:54,864 INFO L87 Difference]: Start difference. First operand 108 states and 140 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 07:35:54,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:35:54,906 INFO L93 Difference]: Finished difference Result 92 states and 115 transitions. [2021-11-20 07:35:54,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:35:54,907 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-20 07:35:54,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:35:54,908 INFO L225 Difference]: With dead ends: 92 [2021-11-20 07:35:54,908 INFO L226 Difference]: Without dead ends: 90 [2021-11-20 07:35:54,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:35:54,910 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 0 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:35:54,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 245 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:35:54,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-20 07:35:54,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-11-20 07:35:54,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 69 states have (on average 1.565217391304348) internal successors, (108), 86 states have internal predecessors, (108), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:35:54,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2021-11-20 07:35:54,918 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 11 [2021-11-20 07:35:54,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:35:54,919 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2021-11-20 07:35:54,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 07:35:54,919 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2021-11-20 07:35:54,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 07:35:54,924 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:35:54,925 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:35:54,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 07:35:55,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:35:55,135 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-20 07:35:55,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:55,136 INFO L85 PathProgramCache]: Analyzing trace with hash 278392174, now seen corresponding path program 1 times [2021-11-20 07:35:55,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:35:55,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127374684] [2021-11-20 07:35:55,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:55,137 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:35:55,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:35:55,138 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:35:55,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 07:35:55,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:55,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 07:35:55,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:35:55,234 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 [2021-11-20 07:35:55,471 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:35:55,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:35:56,771 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:35:56,772 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:35:56,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127374684] [2021-11-20 07:35:56,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1127374684] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:35:56,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:35:56,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-11-20 07:35:56,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099414996] [2021-11-20 07:35:56,773 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:35:56,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:35:56,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:35:56,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:35:56,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:35:56,775 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand has 18 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:35:58,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:35:58,186 INFO L93 Difference]: Finished difference Result 255 states and 292 transitions. [2021-11-20 07:35:58,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:35:58,188 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-11-20 07:35:58,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:35:58,190 INFO L225 Difference]: With dead ends: 255 [2021-11-20 07:35:58,190 INFO L226 Difference]: Without dead ends: 255 [2021-11-20 07:35:58,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-11-20 07:35:58,199 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 633 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:35:58,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [636 Valid, 510 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 329 Invalid, 0 Unknown, 181 Unchecked, 0.9s Time] [2021-11-20 07:35:58,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-11-20 07:35:58,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 102. [2021-11-20 07:35:58,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 81 states have (on average 1.5061728395061729) internal successors, (122), 98 states have internal predecessors, (122), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:35:58,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 127 transitions. [2021-11-20 07:35:58,216 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 127 transitions. Word has length 17 [2021-11-20 07:35:58,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:35:58,217 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 127 transitions. [2021-11-20 07:35:58,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:35:58,217 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 127 transitions. [2021-11-20 07:35:58,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 07:35:58,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:35:58,218 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:35:58,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-20 07:35:58,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:35:58,429 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-20 07:35:58,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:58,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1611943505, now seen corresponding path program 1 times [2021-11-20 07:35:58,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:35:58,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1622683875] [2021-11-20 07:35:58,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:35:58,431 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:35:58,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:35:58,432 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:35:58,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 07:35:58,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:35:58,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:35:58,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:35:58,636 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:35:58,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:35:58,833 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:35:58,833 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:35:58,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1622683875] [2021-11-20 07:35:58,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1622683875] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:35:58,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:35:58,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-20 07:35:58,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862022325] [2021-11-20 07:35:58,835 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:35:58,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 07:35:58,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:35:58,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 07:35:58,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:35:58,836 INFO L87 Difference]: Start difference. First operand 102 states and 127 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:35:59,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:35:59,131 INFO L93 Difference]: Finished difference Result 108 states and 130 transitions. [2021-11-20 07:35:59,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:35:59,135 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2021-11-20 07:35:59,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:35:59,136 INFO L225 Difference]: With dead ends: 108 [2021-11-20 07:35:59,137 INFO L226 Difference]: Without dead ends: 108 [2021-11-20 07:35:59,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:35:59,138 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 88 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:35:59,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 330 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:35:59,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-20 07:35:59,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-11-20 07:35:59,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 86 states have (on average 1.4534883720930232) internal successors, (125), 103 states have internal predecessors, (125), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:35:59,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 130 transitions. [2021-11-20 07:35:59,147 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 130 transitions. Word has length 24 [2021-11-20 07:35:59,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:35:59,148 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 130 transitions. [2021-11-20 07:35:59,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:35:59,148 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 130 transitions. [2021-11-20 07:35:59,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 07:35:59,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:35:59,149 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:35:59,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-20 07:35:59,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:35:59,364 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-20 07:35:59,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:59,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1532770002, now seen corresponding path program 2 times [2021-11-20 07:35:59,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:35:59,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1628901676] [2021-11-20 07:35:59,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:35:59,365 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:35:59,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:35:59,366 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:35:59,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 07:35:59,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:35:59,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:35:59,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 07:35:59,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:35:59,472 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 [2021-11-20 07:36:00,108 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:36:00,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:36:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:36:03,299 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:36:03,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1628901676] [2021-11-20 07:36:03,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1628901676] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:36:03,300 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:36:03,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-11-20 07:36:03,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790923476] [2021-11-20 07:36:03,300 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:36:03,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-20 07:36:03,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:36:03,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-20 07:36:03,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2021-11-20 07:36:03,303 INFO L87 Difference]: Start difference. First operand 107 states and 130 transitions. Second operand has 28 states, 25 states have (on average 2.12) internal successors, (53), 26 states have internal predecessors, (53), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:36:08,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:36:08,440 INFO L93 Difference]: Finished difference Result 144 states and 163 transitions. [2021-11-20 07:36:08,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 07:36:08,441 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.12) internal successors, (53), 26 states have internal predecessors, (53), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2021-11-20 07:36:08,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:36:08,442 INFO L225 Difference]: With dead ends: 144 [2021-11-20 07:36:08,443 INFO L226 Difference]: Without dead ends: 144 [2021-11-20 07:36:08,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2021-11-20 07:36:08,444 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 572 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:36:08,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 693 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 608 Invalid, 0 Unknown, 91 Unchecked, 1.7s Time] [2021-11-20 07:36:08,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-20 07:36:08,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 126. [2021-11-20 07:36:08,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 105 states have (on average 1.4190476190476191) internal successors, (149), 122 states have internal predecessors, (149), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:36:08,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 154 transitions. [2021-11-20 07:36:08,453 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 154 transitions. Word has length 29 [2021-11-20 07:36:08,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:36:08,453 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 154 transitions. [2021-11-20 07:36:08,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.12) internal successors, (53), 26 states have internal predecessors, (53), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:36:08,454 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 154 transitions. [2021-11-20 07:36:08,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 07:36:08,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:36:08,455 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:36:08,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-20 07:36:08,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:36:08,666 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-20 07:36:08,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:36:08,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1387208746, now seen corresponding path program 2 times [2021-11-20 07:36:08,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:36:08,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1974130160] [2021-11-20 07:36:08,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:36:08,667 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:36:08,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:36:08,668 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:36:08,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-20 07:36:08,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-20 07:36:08,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:36:08,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 07:36:08,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:36:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-20 07:36:08,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:36:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-20 07:36:08,994 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:36:08,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1974130160] [2021-11-20 07:36:08,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1974130160] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:36:08,994 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:36:08,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 07:36:08,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017278807] [2021-11-20 07:36:08,995 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:36:08,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:36:08,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:36:08,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:36:08,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:36:08,996 INFO L87 Difference]: Start difference. First operand 126 states and 154 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:36:09,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:36:09,088 INFO L93 Difference]: Finished difference Result 179 states and 196 transitions. [2021-11-20 07:36:09,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:36:09,089 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2021-11-20 07:36:09,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:36:09,091 INFO L225 Difference]: With dead ends: 179 [2021-11-20 07:36:09,091 INFO L226 Difference]: Without dead ends: 179 [2021-11-20 07:36:09,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:36:09,092 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 212 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:36:09,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 169 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:36:09,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-20 07:36:09,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 107. [2021-11-20 07:36:09,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 85 states have (on average 1.3647058823529412) internal successors, (116), 102 states have internal predecessors, (116), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:36:09,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 124 transitions. [2021-11-20 07:36:09,108 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 124 transitions. Word has length 39 [2021-11-20 07:36:09,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:36:09,109 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 124 transitions. [2021-11-20 07:36:09,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:36:09,109 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 124 transitions. [2021-11-20 07:36:09,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 07:36:09,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:36:09,118 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:36:09,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-20 07:36:09,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:36:09,329 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-20 07:36:09,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:36:09,330 INFO L85 PathProgramCache]: Analyzing trace with hash -103753423, now seen corresponding path program 1 times [2021-11-20 07:36:09,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:36:09,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833410240] [2021-11-20 07:36:09,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:36:09,330 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:36:09,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:36:09,331 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:36:09,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-20 07:36:09,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:09,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 07:36:09,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:36:09,726 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 4 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:36:09,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:36:10,215 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:36:10,215 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:36:10,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833410240] [2021-11-20 07:36:10,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [833410240] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:36:10,216 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:36:10,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-11-20 07:36:10,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483343962] [2021-11-20 07:36:10,216 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:36:10,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 07:36:10,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:36:10,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 07:36:10,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-11-20 07:36:10,218 INFO L87 Difference]: Start difference. First operand 107 states and 124 transitions. Second operand has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 states have internal predecessors, (68), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 07:36:10,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:36:10,649 INFO L93 Difference]: Finished difference Result 107 states and 122 transitions. [2021-11-20 07:36:10,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:36:10,650 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 states have internal predecessors, (68), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 44 [2021-11-20 07:36:10,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:36:10,651 INFO L225 Difference]: With dead ends: 107 [2021-11-20 07:36:10,651 INFO L226 Difference]: Without dead ends: 107 [2021-11-20 07:36:10,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-11-20 07:36:10,652 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 89 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:36:10,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 798 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:36:10,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-20 07:36:10,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-11-20 07:36:10,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 85 states have (on average 1.3411764705882352) internal successors, (114), 102 states have internal predecessors, (114), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 07:36:10,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 122 transitions. [2021-11-20 07:36:10,659 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 122 transitions. Word has length 44 [2021-11-20 07:36:10,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:36:10,659 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 122 transitions. [2021-11-20 07:36:10,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 states have internal predecessors, (68), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 07:36:10,660 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 122 transitions. [2021-11-20 07:36:10,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-20 07:36:10,661 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:36:10,661 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:36:10,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-20 07:36:10,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:36:10,872 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-20 07:36:10,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:36:10,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1217377455, now seen corresponding path program 2 times [2021-11-20 07:36:10,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:36:10,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1363008696] [2021-11-20 07:36:10,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:36:10,874 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:36:10,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:36:10,875 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:36:10,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-20 07:36:10,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:36:10,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:36:11,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 07:36:11,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:36:11,027 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 [2021-11-20 07:36:11,214 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-20 07:36:11,214 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 16 treesize of output 21 [2021-11-20 07:36:11,237 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-20 07:36:11,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:36:11,512 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-20 07:36:11,513 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:36:11,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1363008696] [2021-11-20 07:36:11,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1363008696] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:36:11,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:36:11,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-11-20 07:36:11,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193669638] [2021-11-20 07:36:11,513 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:36:11,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:36:11,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:36:11,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:36:11,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:36:11,515 INFO L87 Difference]: Start difference. First operand 107 states and 122 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:36:11,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:36:11,834 INFO L93 Difference]: Finished difference Result 168 states and 192 transitions. [2021-11-20 07:36:11,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:36:11,835 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2021-11-20 07:36:11,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:36:11,836 INFO L225 Difference]: With dead ends: 168 [2021-11-20 07:36:11,836 INFO L226 Difference]: Without dead ends: 168 [2021-11-20 07:36:11,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 86 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:36:11,838 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 72 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:36:11,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 363 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 196 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2021-11-20 07:36:11,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-20 07:36:11,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 128. [2021-11-20 07:36:11,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 106 states have (on average 1.3584905660377358) internal successors, (144), 121 states have internal predecessors, (144), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-20 07:36:11,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 155 transitions. [2021-11-20 07:36:11,845 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 155 transitions. Word has length 50 [2021-11-20 07:36:11,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:36:11,845 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 155 transitions. [2021-11-20 07:36:11,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:36:11,846 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 155 transitions. [2021-11-20 07:36:11,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-20 07:36:11,847 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:36:11,847 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:36:11,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-20 07:36:12,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:36:12,056 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-20 07:36:12,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:36:12,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1217377454, now seen corresponding path program 1 times [2021-11-20 07:36:12,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:36:12,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1149945082] [2021-11-20 07:36:12,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:36:12,057 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:36:12,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:36:12,058 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:36:12,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-20 07:36:12,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:12,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 07:36:12,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:36:12,260 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 [2021-11-20 07:36:12,268 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 [2021-11-20 07:36:14,922 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:36:14,923 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 [2021-11-20 07:36:14,950 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:36:14,950 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 27 treesize of output 27 [2021-11-20 07:36:15,015 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-20 07:36:15,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:36:36,793 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 30 treesize of output 28 [2021-11-20 07:36:37,466 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 [2021-11-20 07:36:37,679 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-20 07:36:37,679 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:36:37,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1149945082] [2021-11-20 07:36:37,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1149945082] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:36:37,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:36:37,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-11-20 07:36:37,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064519288] [2021-11-20 07:36:37,680 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:36:37,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 07:36:37,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:36:37,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 07:36:37,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=325, Unknown=7, NotChecked=0, Total=380 [2021-11-20 07:36:37,682 INFO L87 Difference]: Start difference. First operand 128 states and 155 transitions. Second operand has 20 states, 17 states have (on average 2.176470588235294) internal successors, (37), 18 states have internal predecessors, (37), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:36:43,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:36:43,351 INFO L93 Difference]: Finished difference Result 273 states and 314 transitions. [2021-11-20 07:36:43,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 07:36:43,352 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.176470588235294) internal successors, (37), 18 states have internal predecessors, (37), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 50 [2021-11-20 07:36:43,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:36:43,355 INFO L225 Difference]: With dead ends: 273 [2021-11-20 07:36:43,355 INFO L226 Difference]: Without dead ends: 273 [2021-11-20 07:36:43,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=117, Invalid=687, Unknown=8, NotChecked=0, Total=812 [2021-11-20 07:36:43,356 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 218 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 528 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:36:43,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 946 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 268 Invalid, 0 Unknown, 528 Unchecked, 0.8s Time] [2021-11-20 07:36:43,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-11-20 07:36:43,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 134. [2021-11-20 07:36:43,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 110 states have (on average 1.3363636363636364) internal successors, (147), 126 states have internal predecessors, (147), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-20 07:36:43,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 158 transitions. [2021-11-20 07:36:43,365 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 158 transitions. Word has length 50 [2021-11-20 07:36:43,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:36:43,365 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 158 transitions. [2021-11-20 07:36:43,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.176470588235294) internal successors, (37), 18 states have internal predecessors, (37), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:36:43,366 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 158 transitions. [2021-11-20 07:36:43,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-20 07:36:43,367 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:36:43,367 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:36:43,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-20 07:36:43,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:36:43,576 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-20 07:36:43,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:36:43,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1668680547, now seen corresponding path program 1 times [2021-11-20 07:36:43,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:36:43,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1038422733] [2021-11-20 07:36:43,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:36:43,577 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:36:43,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:36:43,578 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:36:43,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-20 07:36:43,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:43,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 07:36:43,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:36:43,810 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-20 07:36:43,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:36:43,899 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-20 07:36:43,899 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:36:43,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1038422733] [2021-11-20 07:36:43,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1038422733] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:36:43,900 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:36:43,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 07:36:43,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176844278] [2021-11-20 07:36:43,901 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:36:43,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:36:43,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:36:43,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:36:43,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:36:43,902 INFO L87 Difference]: Start difference. First operand 134 states and 158 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:36:43,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:36:43,954 INFO L93 Difference]: Finished difference Result 180 states and 209 transitions. [2021-11-20 07:36:43,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:36:43,955 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 52 [2021-11-20 07:36:43,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:36:43,956 INFO L225 Difference]: With dead ends: 180 [2021-11-20 07:36:43,957 INFO L226 Difference]: Without dead ends: 180 [2021-11-20 07:36:43,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:36:43,958 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 42 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:36:43,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 349 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:36:43,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-20 07:36:43,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 136. [2021-11-20 07:36:43,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 112 states have (on average 1.3214285714285714) internal successors, (148), 127 states have internal predecessors, (148), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-20 07:36:43,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 159 transitions. [2021-11-20 07:36:43,964 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 159 transitions. Word has length 52 [2021-11-20 07:36:43,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:36:43,965 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 159 transitions. [2021-11-20 07:36:43,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:36:43,965 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 159 transitions. [2021-11-20 07:36:43,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-20 07:36:43,966 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:36:43,967 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:36:43,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-20 07:36:44,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:36:44,179 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-20 07:36:44,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:36:44,179 INFO L85 PathProgramCache]: Analyzing trace with hash 74129788, now seen corresponding path program 1 times [2021-11-20 07:36:44,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:36:44,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510790486] [2021-11-20 07:36:44,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:36:44,180 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:36:44,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:36:44,181 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:36:44,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-20 07:36:44,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:36:44,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:36:44,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:36:44,406 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-11-20 07:36:44,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:36:44,512 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-11-20 07:36:44,512 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:36:44,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510790486] [2021-11-20 07:36:44,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510790486] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:36:44,512 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:36:44,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 07:36:44,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413107931] [2021-11-20 07:36:44,513 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:36:44,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:36:44,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:36:44,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:36:44,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:36:44,514 INFO L87 Difference]: Start difference. First operand 136 states and 159 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:36:44,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:36:44,576 INFO L93 Difference]: Finished difference Result 166 states and 192 transitions. [2021-11-20 07:36:44,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:36:44,576 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 52 [2021-11-20 07:36:44,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:36:44,578 INFO L225 Difference]: With dead ends: 166 [2021-11-20 07:36:44,578 INFO L226 Difference]: Without dead ends: 166 [2021-11-20 07:36:44,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:36:44,579 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 98 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:36:44,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 221 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:36:44,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-20 07:36:44,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 138. [2021-11-20 07:36:44,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 114 states have (on average 1.3157894736842106) internal successors, (150), 129 states have internal predecessors, (150), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-20 07:36:44,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 161 transitions. [2021-11-20 07:36:44,586 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 161 transitions. Word has length 52 [2021-11-20 07:36:44,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:36:44,586 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 161 transitions. [2021-11-20 07:36:44,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:36:44,587 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 161 transitions. [2021-11-20 07:36:44,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-20 07:36:44,588 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:36:44,588 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:36:44,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-20 07:36:44,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:36:44,800 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-20 07:36:44,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:36:44,802 INFO L85 PathProgramCache]: Analyzing trace with hash -769089362, now seen corresponding path program 3 times [2021-11-20 07:36:44,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:36:44,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1192082696] [2021-11-20 07:36:44,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:36:44,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:36:44,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:36:44,815 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:36:44,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-20 07:36:45,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-20 07:36:45,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:36:45,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-20 07:36:45,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:36:45,117 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 [2021-11-20 07:36:46,421 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 41 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:36:46,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:36:57,466 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:36:57,467 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:36:57,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1192082696] [2021-11-20 07:36:57,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1192082696] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:36:57,467 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:36:57,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 43 [2021-11-20 07:36:57,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121649723] [2021-11-20 07:36:57,467 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:36:57,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-20 07:36:57,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:36:57,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-20 07:36:57,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=1404, Unknown=0, NotChecked=0, Total=1806 [2021-11-20 07:36:57,470 INFO L87 Difference]: Start difference. First operand 138 states and 161 transitions. Second operand has 43 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 41 states have internal predecessors, (101), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:37:06,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:37:06,269 INFO L93 Difference]: Finished difference Result 154 states and 179 transitions. [2021-11-20 07:37:06,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 07:37:06,269 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 41 states have internal predecessors, (101), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2021-11-20 07:37:06,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:37:06,270 INFO L225 Difference]: With dead ends: 154 [2021-11-20 07:37:06,270 INFO L226 Difference]: Without dead ends: 154 [2021-11-20 07:37:06,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=444, Invalid=1536, Unknown=0, NotChecked=0, Total=1980 [2021-11-20 07:37:06,272 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 725 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 901 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:37:06,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [728 Valid, 901 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 982 Invalid, 0 Unknown, 113 Unchecked, 4.2s Time] [2021-11-20 07:37:06,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-20 07:37:06,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2021-11-20 07:37:06,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 101 states have (on average 1.297029702970297) internal successors, (131), 115 states have internal predecessors, (131), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-20 07:37:06,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 142 transitions. [2021-11-20 07:37:06,278 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 142 transitions. Word has length 53 [2021-11-20 07:37:06,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:37:06,279 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 142 transitions. [2021-11-20 07:37:06,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 41 states have internal predecessors, (101), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:37:06,279 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 142 transitions. [2021-11-20 07:37:06,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-20 07:37:06,280 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:06,280 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:37:06,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-20 07:37:06,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:37:06,492 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-20 07:37:06,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:06,492 INFO L85 PathProgramCache]: Analyzing trace with hash 785915305, now seen corresponding path program 1 times [2021-11-20 07:37:06,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:37:06,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [541405111] [2021-11-20 07:37:06,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:06,493 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:37:06,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:37:06,495 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:37:06,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-20 07:37:06,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:06,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 07:37:06,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:37:06,595 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 [2021-11-20 07:37:06,800 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-20 07:37:06,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:37:07,104 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-20 07:37:07,104 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:37:07,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [541405111] [2021-11-20 07:37:07,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [541405111] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:37:07,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:37:07,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-20 07:37:07,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746648088] [2021-11-20 07:37:07,105 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:37:07,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:37:07,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:37:07,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:37:07,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:37:07,106 INFO L87 Difference]: Start difference. First operand 124 states and 142 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:37:07,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:37:07,327 INFO L93 Difference]: Finished difference Result 147 states and 162 transitions. [2021-11-20 07:37:07,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:37:07,328 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2021-11-20 07:37:07,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:37:07,329 INFO L225 Difference]: With dead ends: 147 [2021-11-20 07:37:07,329 INFO L226 Difference]: Without dead ends: 145 [2021-11-20 07:37:07,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:37:07,330 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 46 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:37:07,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 249 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 130 Invalid, 0 Unknown, 36 Unchecked, 0.2s Time] [2021-11-20 07:37:07,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-20 07:37:07,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 127. [2021-11-20 07:37:07,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 104 states have (on average 1.2980769230769231) internal successors, (135), 117 states have internal predecessors, (135), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-20 07:37:07,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 146 transitions. [2021-11-20 07:37:07,336 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 146 transitions. Word has length 55 [2021-11-20 07:37:07,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:37:07,336 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 146 transitions. [2021-11-20 07:37:07,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:37:07,337 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 146 transitions. [2021-11-20 07:37:07,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-20 07:37:07,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:07,338 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:37:07,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-20 07:37:07,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:37:07,550 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-20 07:37:07,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:07,551 INFO L85 PathProgramCache]: Analyzing trace with hash 785915306, now seen corresponding path program 1 times [2021-11-20 07:37:07,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:37:07,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1680196455] [2021-11-20 07:37:07,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:07,551 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:37:07,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:37:07,552 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:37:07,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-20 07:37:07,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:07,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 07:37:07,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:37:07,675 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 [2021-11-20 07:37:08,071 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-20 07:37:08,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:37:09,356 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-20 07:37:09,356 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:37:09,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1680196455] [2021-11-20 07:37:09,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1680196455] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:37:09,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:37:09,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-11-20 07:37:09,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936158090] [2021-11-20 07:37:09,357 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:37:09,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 07:37:09,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:37:09,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 07:37:09,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:37:09,359 INFO L87 Difference]: Start difference. First operand 127 states and 146 transitions. Second operand has 16 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 14 states have internal predecessors, (47), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:37:10,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:37:10,433 INFO L93 Difference]: Finished difference Result 197 states and 215 transitions. [2021-11-20 07:37:10,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:37:10,434 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 14 states have internal predecessors, (47), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 55 [2021-11-20 07:37:10,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:37:10,435 INFO L225 Difference]: With dead ends: 197 [2021-11-20 07:37:10,435 INFO L226 Difference]: Without dead ends: 197 [2021-11-20 07:37:10,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-11-20 07:37:10,437 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 263 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:37:10,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 488 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 241 Invalid, 0 Unknown, 137 Unchecked, 0.7s Time] [2021-11-20 07:37:10,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-20 07:37:10,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 156. [2021-11-20 07:37:10,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 132 states have (on average 1.378787878787879) internal successors, (182), 145 states have internal predecessors, (182), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-20 07:37:10,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 193 transitions. [2021-11-20 07:37:10,443 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 193 transitions. Word has length 55 [2021-11-20 07:37:10,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:37:10,444 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 193 transitions. [2021-11-20 07:37:10,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 14 states have internal predecessors, (47), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:37:10,444 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 193 transitions. [2021-11-20 07:37:10,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 07:37:10,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:37:10,445 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:37:10,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-20 07:37:10,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:37:10,657 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-20 07:37:10,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:37:10,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1406429259, now seen corresponding path program 1 times [2021-11-20 07:37:10,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:37:10,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579844110] [2021-11-20 07:37:10,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:37:10,658 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:37:10,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:37:10,659 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:37:10,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-20 07:37:10,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:37:10,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-20 07:37:10,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:37:10,816 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 [2021-11-20 07:37:10,882 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 07:37:10,882 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 [2021-11-20 07:37:10,977 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-20 07:37:10,977 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 [2021-11-20 07:37:11,123 INFO L354 Elim1Store]: treesize reduction 116, result has 18.3 percent of original size [2021-11-20 07:37:11,124 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 [2021-11-20 07:37:11,424 INFO L354 Elim1Store]: treesize reduction 180, result has 16.3 percent of original size [2021-11-20 07:37:11,424 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 [2021-11-20 07:37:11,795 INFO L354 Elim1Store]: treesize reduction 277, result has 14.5 percent of original size [2021-11-20 07:37:11,796 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 [2021-11-20 07:37:12,204 INFO L354 Elim1Store]: treesize reduction 392, result has 13.1 percent of original size [2021-11-20 07:37:12,205 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 [2021-11-20 07:37:12,722 INFO L354 Elim1Store]: treesize reduction 525, result has 11.9 percent of original size [2021-11-20 07:37:12,722 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 [2021-11-20 07:37:13,427 INFO L354 Elim1Store]: treesize reduction 556, result has 11.3 percent of original size [2021-11-20 07:37:13,427 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 [2021-11-20 07:37:14,223 INFO L354 Elim1Store]: treesize reduction 644, result has 11.0 percent of original size [2021-11-20 07:37:14,224 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 [2021-11-20 07:37:36,969 INFO L354 Elim1Store]: treesize reduction 522, result has 0.2 percent of original size [2021-11-20 07:37:36,970 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 [2021-11-20 07:37:37,058 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 4 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:37:37,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:38:21,776 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 [2021-11-20 07:38:21,781 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 [2021-11-20 07:38:22,407 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 126 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:38:22,407 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:38:22,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579844110] [2021-11-20 07:38:22,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579844110] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:38:22,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:38:22,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-11-20 07:38:22,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24037949] [2021-11-20 07:38:22,408 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:38:22,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-20 07:38:22,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:38:22,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-20 07:38:22,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=1444, Unknown=27, NotChecked=0, Total=2070 [2021-11-20 07:38:22,411 INFO L87 Difference]: Start difference. First operand 156 states and 193 transitions. Second operand has 46 states, 45 states have (on average 2.111111111111111) internal successors, (95), 46 states have internal predecessors, (95), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:38:28,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:28,683 INFO L93 Difference]: Finished difference Result 212 states and 249 transitions. [2021-11-20 07:38:28,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-20 07:38:28,685 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.111111111111111) internal successors, (95), 46 states have internal predecessors, (95), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 56 [2021-11-20 07:38:28,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:28,687 INFO L225 Difference]: With dead ends: 212 [2021-11-20 07:38:28,687 INFO L226 Difference]: Without dead ends: 212 [2021-11-20 07:38:28,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 69.0s TimeCoverageRelationStatistics Valid=754, Invalid=1871, Unknown=27, NotChecked=0, Total=2652 [2021-11-20 07:38:28,689 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 594 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:28,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [594 Valid, 639 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 823 Invalid, 0 Unknown, 36 Unchecked, 4.8s Time] [2021-11-20 07:38:28,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-11-20 07:38:28,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 167. [2021-11-20 07:38:28,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 143 states have (on average 1.3846153846153846) internal successors, (198), 156 states have internal predecessors, (198), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-20 07:38:28,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 209 transitions. [2021-11-20 07:38:28,698 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 209 transitions. Word has length 56 [2021-11-20 07:38:28,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:28,699 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 209 transitions. [2021-11-20 07:38:28,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.111111111111111) internal successors, (95), 46 states have internal predecessors, (95), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:38:28,700 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 209 transitions. [2021-11-20 07:38:28,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 07:38:28,701 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:28,701 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:38:28,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-20 07:38:28,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:38:28,912 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)] === [2021-11-20 07:38:28,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:28,913 INFO L85 PathProgramCache]: Analyzing trace with hash -649679687, now seen corresponding path program 1 times [2021-11-20 07:38:28,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:38:28,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1949105145] [2021-11-20 07:38:28,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:28,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:38:28,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:38:28,914 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:38:28,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-20 07:38:29,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:29,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 07:38:29,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:38:29,249 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-11-20 07:38:29,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:38:29,461 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-11-20 07:38:29,462 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:38:29,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1949105145] [2021-11-20 07:38:29,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1949105145] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:38:29,462 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:38:29,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 07:38:29,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505287686] [2021-11-20 07:38:29,462 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:38:29,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:38:29,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:38:29,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:38:29,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:38:29,464 INFO L87 Difference]: Start difference. First operand 167 states and 209 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 07:38:29,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:29,566 INFO L93 Difference]: Finished difference Result 175 states and 211 transitions. [2021-11-20 07:38:29,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:38:29,567 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2021-11-20 07:38:29,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:29,568 INFO L225 Difference]: With dead ends: 175 [2021-11-20 07:38:29,568 INFO L226 Difference]: Without dead ends: 175 [2021-11-20 07:38:29,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:38:29,569 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 67 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:29,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 165 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:38:29,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-20 07:38:29,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 170. [2021-11-20 07:38:29,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 146 states have (on average 1.36986301369863) internal successors, (200), 159 states have internal predecessors, (200), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-20 07:38:29,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 211 transitions. [2021-11-20 07:38:29,577 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 211 transitions. Word has length 57 [2021-11-20 07:38:29,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:29,578 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 211 transitions. [2021-11-20 07:38:29,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 07:38:29,578 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 211 transitions. [2021-11-20 07:38:29,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 07:38:29,579 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:29,579 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:38:29,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-20 07:38:29,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:38:29,792 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-20 07:38:29,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:29,792 INFO L85 PathProgramCache]: Analyzing trace with hash -649633943, now seen corresponding path program 1 times [2021-11-20 07:38:29,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:38:29,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793349749] [2021-11-20 07:38:29,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:29,793 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:38:29,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:38:29,794 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:38:29,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-20 07:38:29,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:29,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-20 07:38:29,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:38:30,080 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:38:30,080 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 24 treesize of output 24 [2021-11-20 07:38:30,261 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 [2021-11-20 07:38:30,530 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 07:38:30,530 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 [2021-11-20 07:38:30,832 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-20 07:38:30,833 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 [2021-11-20 07:38:31,188 INFO L354 Elim1Store]: treesize reduction 131, result has 18.1 percent of original size [2021-11-20 07:38:31,188 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 44 treesize of output 49 [2021-11-20 07:38:31,636 INFO L354 Elim1Store]: treesize reduction 180, result has 16.3 percent of original size [2021-11-20 07:38:31,636 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 [2021-11-20 07:38:32,194 INFO L354 Elim1Store]: treesize reduction 277, result has 14.5 percent of original size [2021-11-20 07:38:32,195 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 [2021-11-20 07:38:32,831 INFO L354 Elim1Store]: treesize reduction 344, result has 13.4 percent of original size [2021-11-20 07:38:32,831 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 [2021-11-20 07:38:33,721 INFO L354 Elim1Store]: treesize reduction 444, result has 12.3 percent of original size [2021-11-20 07:38:33,721 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 [2021-11-20 07:38:34,872 INFO L354 Elim1Store]: treesize reduction 586, result has 11.2 percent of original size [2021-11-20 07:38:34,872 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 89 treesize of output 109 [2021-11-20 07:38:36,284 INFO L354 Elim1Store]: treesize reduction 644, result has 11.0 percent of original size [2021-11-20 07:38:36,285 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 [2021-11-20 07:39:04,607 INFO L354 Elim1Store]: treesize reduction 522, result has 0.2 percent of original size [2021-11-20 07:39:04,608 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 [2021-11-20 07:39:04,911 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:39:04,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:39:36,070 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 [2021-11-20 07:39:36,074 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 23470 treesize of output 23468 [2021-11-20 07:39:38,598 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 126 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:39:38,599 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:39:38,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793349749] [2021-11-20 07:39:38,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1793349749] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:39:38,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:39:38,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24] total 51 [2021-11-20 07:39:38,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341123591] [2021-11-20 07:39:38,600 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:39:38,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-20 07:39:38,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:39:38,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-20 07:39:38,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=684, Invalid=1955, Unknown=13, NotChecked=0, Total=2652 [2021-11-20 07:39:38,603 INFO L87 Difference]: Start difference. First operand 170 states and 211 transitions. Second operand has 52 states, 51 states have (on average 2.0588235294117645) internal successors, (105), 52 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:39:39,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:39:39,097 INFO L93 Difference]: Finished difference Result 172 states and 211 transitions. [2021-11-20 07:39:39,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 07:39:39,099 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 2.0588235294117645) internal successors, (105), 52 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2021-11-20 07:39:39,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:39:39,101 INFO L225 Difference]: With dead ends: 172 [2021-11-20 07:39:39,101 INFO L226 Difference]: Without dead ends: 172 [2021-11-20 07:39:39,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 60.8s TimeCoverageRelationStatistics Valid=684, Invalid=1955, Unknown=13, NotChecked=0, Total=2652 [2021-11-20 07:39:39,103 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 92 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:39:39,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 499 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 91 Unchecked, 0.5s Time] [2021-11-20 07:39:39,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-20 07:39:39,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2021-11-20 07:39:39,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 147 states have (on average 1.3605442176870748) internal successors, (200), 161 states have internal predecessors, (200), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-20 07:39:39,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 211 transitions. [2021-11-20 07:39:39,111 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 211 transitions. Word has length 57 [2021-11-20 07:39:39,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:39:39,112 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 211 transitions. [2021-11-20 07:39:39,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 2.0588235294117645) internal successors, (105), 52 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:39:39,113 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 211 transitions. [2021-11-20 07:39:39,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 07:39:39,114 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:39:39,114 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:39:39,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-20 07:39:39,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:39:39,328 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-20 07:39:39,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:39:39,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1336184375, now seen corresponding path program 1 times [2021-11-20 07:39:39,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:39:39,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [251731346] [2021-11-20 07:39:39,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:39:39,330 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:39:39,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:39:39,332 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:39:39,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-20 07:39:39,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:39:39,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-20 07:39:39,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:39:39,548 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 [2021-11-20 07:39:39,646 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 07:39:39,647 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 [2021-11-20 07:39:39,830 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-20 07:39:39,830 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 [2021-11-20 07:39:40,140 INFO L354 Elim1Store]: treesize reduction 131, result has 18.1 percent of original size [2021-11-20 07:39:40,140 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 44 treesize of output 49 [2021-11-20 07:39:40,527 INFO L354 Elim1Store]: treesize reduction 180, result has 16.3 percent of original size [2021-11-20 07:39:40,528 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 [2021-11-20 07:39:41,010 INFO L354 Elim1Store]: treesize reduction 256, result has 14.7 percent of original size [2021-11-20 07:39:41,011 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 59 treesize of output 70 [2021-11-20 07:39:41,695 INFO L354 Elim1Store]: treesize reduction 344, result has 13.4 percent of original size [2021-11-20 07:39:41,695 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 [2021-11-20 07:39:42,499 INFO L354 Elim1Store]: treesize reduction 444, result has 12.3 percent of original size [2021-11-20 07:39:42,500 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 [2021-11-20 07:39:43,336 INFO L354 Elim1Store]: treesize reduction 556, result has 11.3 percent of original size [2021-11-20 07:39:43,336 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 [2021-11-20 07:39:44,338 INFO L354 Elim1Store]: treesize reduction 644, result has 11.0 percent of original size [2021-11-20 07:39:44,338 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 [2021-11-20 07:40:16,268 INFO L354 Elim1Store]: treesize reduction 522, result has 0.2 percent of original size [2021-11-20 07:40:16,269 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 [2021-11-20 07:40:16,386 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 4 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:40:16,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:41:15,483 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 [2021-11-20 07:41:15,488 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 [2021-11-20 07:41:16,114 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 126 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:41:16,115 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:41:16,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [251731346] [2021-11-20 07:41:16,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [251731346] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:41:16,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:41:16,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-11-20 07:41:16,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597890239] [2021-11-20 07:41:16,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:41:16,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-20 07:41:16,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:41:16,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-20 07:41:16,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=1440, Unknown=31, NotChecked=0, Total=2070 [2021-11-20 07:41:16,118 INFO L87 Difference]: Start difference. First operand 172 states and 211 transitions. Second operand has 46 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 46 states have internal predecessors, (97), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:41:22,378 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 07:41:23,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:41:23,028 INFO L93 Difference]: Finished difference Result 192 states and 230 transitions. [2021-11-20 07:41:23,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 07:41:23,030 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 46 states have internal predecessors, (97), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 58 [2021-11-20 07:41:23,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:41:23,031 INFO L225 Difference]: With dead ends: 192 [2021-11-20 07:41:23,031 INFO L226 Difference]: Without dead ends: 192 [2021-11-20 07:41:23,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 91.9s TimeCoverageRelationStatistics Valid=675, Invalid=1646, Unknown=31, NotChecked=0, Total=2352 [2021-11-20 07:41:23,034 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 314 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 84 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:41:23,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 673 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 804 Invalid, 1 Unknown, 36 Unchecked, 6.1s Time] [2021-11-20 07:41:23,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-20 07:41:23,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 172. [2021-11-20 07:41:23,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 147 states have (on average 1.3537414965986394) internal successors, (199), 161 states have internal predecessors, (199), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-20 07:41:23,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 210 transitions. [2021-11-20 07:41:23,054 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 210 transitions. Word has length 58 [2021-11-20 07:41:23,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:41:23,055 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 210 transitions. [2021-11-20 07:41:23,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 46 states have internal predecessors, (97), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:41:23,056 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 210 transitions. [2021-11-20 07:41:23,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-20 07:41:23,056 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:41:23,057 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:41:23,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-20 07:41:23,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:41:23,271 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-20 07:41:23,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:41:23,271 INFO L85 PathProgramCache]: Analyzing trace with hash -869612316, now seen corresponding path program 1 times [2021-11-20 07:41:23,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:41:23,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1393199500] [2021-11-20 07:41:23,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:41:23,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:41:23,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:41:23,273 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:41:23,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-20 07:41:23,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:41:23,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-20 07:41:23,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:41:23,487 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 [2021-11-20 07:41:23,494 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 [2021-11-20 07:41:26,316 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:41:26,317 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 32 treesize of output 34 [2021-11-20 07:41:26,329 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:41:26,329 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 26 treesize of output 26 [2021-11-20 07:41:26,602 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:41:26,602 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 32 treesize of output 34 [2021-11-20 07:41:26,617 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:41:26,618 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 26 treesize of output 26 [2021-11-20 07:41:26,702 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-11-20 07:41:26,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:41:44,978 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 07:41:44,978 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 52 treesize of output 51 [2021-11-20 07:42:34,653 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 37 treesize of output 35 [2021-11-20 07:42:36,216 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 34 treesize of output 32 [2021-11-20 07:42:36,614 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 11 refuted. 4 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-20 07:42:36,614 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:42:36,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1393199500] [2021-11-20 07:42:36,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1393199500] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:42:36,614 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:42:36,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 25 [2021-11-20 07:42:36,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285145632] [2021-11-20 07:42:36,615 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:42:36,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 07:42:36,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:42:36,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 07:42:36,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=561, Unknown=17, NotChecked=0, Total=650 [2021-11-20 07:42:36,617 INFO L87 Difference]: Start difference. First operand 172 states and 210 transitions. Second operand has 26 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 24 states have internal predecessors, (50), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:42:46,778 WARN L838 $PredicateComparison]: unable to prove that (and (= c_ldv_malloc_~size |c_ldv_malloc_#in~size|) (forall ((|v_ULTIMATE.start_alloc_unsafe_17_~i~0#1_BEFORE_CALL_7| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_unsafe_17_~array#1.offset_BEFORE_CALL_5| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_unsafe_17_~array#1.base_BEFORE_CALL_7| (_ BitVec 32)) (|v_ldv_malloc_#res.base_120| (_ BitVec 32))) (or (exists ((|v_ldv_malloc_#res.base_119| (_ BitVec 32))) (and (or (not (let ((.cse0 (bvmul |v_ULTIMATE.start_alloc_unsafe_17_~i~0#1_BEFORE_CALL_7| (_ bv4 32)))) (bvule (bvadd |v_ULTIMATE.start_alloc_unsafe_17_~array#1.offset_BEFORE_CALL_5| .cse0) (bvadd |v_ULTIMATE.start_alloc_unsafe_17_~array#1.offset_BEFORE_CALL_5| (_ bv4 32) .cse0)))) (exists ((v_ldv_malloc_~size_112 (_ BitVec 32))) (not (bvule (bvadd |v_ULTIMATE.start_alloc_unsafe_17_~array#1.offset_BEFORE_CALL_5| (_ bv4 32) (bvmul |v_ULTIMATE.start_alloc_unsafe_17_~i~0#1_BEFORE_CALL_7| (_ bv4 32))) (select (store |c_old(#length)| |v_ldv_malloc_#res.base_119| v_ldv_malloc_~size_112) |v_ULTIMATE.start_alloc_unsafe_17_~array#1.base_BEFORE_CALL_7|))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_119|)))))))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_120|)))) (and (forall ((ldv_malloc_~size (_ BitVec 32))) (bvule (bvadd |v_ULTIMATE.start_alloc_unsafe_17_~array#1.offset_BEFORE_CALL_5| (_ bv4 32) (bvmul |v_ULTIMATE.start_alloc_unsafe_17_~i~0#1_BEFORE_CALL_7| (_ bv4 32))) (select (store |c_#length| |v_ldv_malloc_#res.base_120| ldv_malloc_~size) |v_ULTIMATE.start_alloc_unsafe_17_~array#1.base_BEFORE_CALL_7|))) (let ((.cse1 (bvmul |v_ULTIMATE.start_alloc_unsafe_17_~i~0#1_BEFORE_CALL_7| (_ bv4 32)))) (bvule (bvadd |v_ULTIMATE.start_alloc_unsafe_17_~array#1.offset_BEFORE_CALL_5| .cse1) (bvadd |v_ULTIMATE.start_alloc_unsafe_17_~array#1.offset_BEFORE_CALL_5| (_ bv4 32) .cse1))))))) is different from false [2021-11-20 07:42:57,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:42:57,005 INFO L93 Difference]: Finished difference Result 416 states and 510 transitions. [2021-11-20 07:42:57,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 07:42:57,006 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 24 states have internal predecessors, (50), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 60 [2021-11-20 07:42:57,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:42:57,009 INFO L225 Difference]: With dead ends: 416 [2021-11-20 07:42:57,009 INFO L226 Difference]: Without dead ends: 416 [2021-11-20 07:42:57,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 69.9s TimeCoverageRelationStatistics Valid=190, Invalid=1273, Unknown=23, NotChecked=74, Total=1560 [2021-11-20 07:42:57,011 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 462 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 964 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 677 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:42:57,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 964 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 325 Invalid, 0 Unknown, 677 Unchecked, 1.7s Time] [2021-11-20 07:42:57,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-11-20 07:42:57,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 204. [2021-11-20 07:42:57,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 171 states have (on average 1.3391812865497077) internal successors, (229), 186 states have internal predecessors, (229), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-20 07:42:57,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 249 transitions. [2021-11-20 07:42:57,023 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 249 transitions. Word has length 60 [2021-11-20 07:42:57,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:42:57,024 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 249 transitions. [2021-11-20 07:42:57,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 24 states have internal predecessors, (50), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:42:57,024 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 249 transitions. [2021-11-20 07:42:57,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 07:42:57,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:42:57,026 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:42:57,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-20 07:42:57,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:42:57,240 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-20 07:42:57,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:42:57,241 INFO L85 PathProgramCache]: Analyzing trace with hash -731021682, now seen corresponding path program 1 times [2021-11-20 07:42:57,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:42:57,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2010919056] [2021-11-20 07:42:57,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:42:57,242 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:42:57,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:42:57,243 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:42:57,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-20 07:42:57,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:42:57,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 07:42:57,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:42:58,099 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-20 07:42:58,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:42:59,233 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 11 treesize of output 9 [2021-11-20 07:43:00,089 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-20 07:43:00,089 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:43:00,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2010919056] [2021-11-20 07:43:00,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2010919056] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:43:00,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:43:00,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-11-20 07:43:00,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994486448] [2021-11-20 07:43:00,090 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:43:00,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:43:00,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:43:00,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:43:00,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:43:00,091 INFO L87 Difference]: Start difference. First operand 204 states and 249 transitions. Second operand has 18 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 07:43:04,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:43:04,528 INFO L93 Difference]: Finished difference Result 485 states and 618 transitions. [2021-11-20 07:43:04,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 07:43:04,528 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 62 [2021-11-20 07:43:04,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:43:04,531 INFO L225 Difference]: With dead ends: 485 [2021-11-20 07:43:04,531 INFO L226 Difference]: Without dead ends: 485 [2021-11-20 07:43:04,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2021-11-20 07:43:04,538 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 545 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:43:04,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 955 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 401 Invalid, 0 Unknown, 50 Unchecked, 2.4s Time] [2021-11-20 07:43:04,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-11-20 07:43:04,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 199. [2021-11-20 07:43:04,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 167 states have (on average 1.2934131736526946) internal successors, (216), 181 states have internal predecessors, (216), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-20 07:43:04,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 236 transitions. [2021-11-20 07:43:04,552 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 236 transitions. Word has length 62 [2021-11-20 07:43:04,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:43:04,553 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 236 transitions. [2021-11-20 07:43:04,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 07:43:04,553 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 236 transitions. [2021-11-20 07:43:04,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-20 07:43:04,554 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:43:04,554 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:43:04,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-20 07:43:04,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:43:04,767 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-20 07:43:04,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:43:04,767 INFO L85 PathProgramCache]: Analyzing trace with hash 511945038, now seen corresponding path program 1 times [2021-11-20 07:43:04,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:43:04,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1924150637] [2021-11-20 07:43:04,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:43:04,768 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:43:04,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:43:04,769 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:43:04,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-20 07:43:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:43:04,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-20 07:43:04,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:43:04,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-20 07:43:05,066 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 [2021-11-20 07:43:05,230 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-20 07:43:05,230 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 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-20 07:43:05,499 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-20 07:43:05,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-11-20 07:43:05,796 INFO L354 Elim1Store]: treesize reduction 116, result has 18.3 percent of original size [2021-11-20 07:43:05,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 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 [2021-11-20 07:43:06,226 INFO L354 Elim1Store]: treesize reduction 198, result has 16.1 percent of original size [2021-11-20 07:43:06,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 61 [2021-11-20 07:43:06,733 INFO L354 Elim1Store]: treesize reduction 298, result has 14.4 percent of original size [2021-11-20 07:43:06,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 76 [2021-11-20 07:43:07,480 INFO L354 Elim1Store]: treesize reduction 416, result has 13.0 percent of original size [2021-11-20 07:43:07,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 77 treesize of output 91 [2021-11-20 07:43:08,306 INFO L354 Elim1Store]: treesize reduction 444, result has 12.3 percent of original size [2021-11-20 07:43:08,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 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 [2021-11-20 07:43:09,196 INFO L354 Elim1Store]: treesize reduction 556, result has 11.3 percent of original size [2021-11-20 07:43:09,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 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 [2021-11-20 07:43:10,297 INFO L354 Elim1Store]: treesize reduction 644, result has 11.0 percent of original size [2021-11-20 07:43:10,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 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 [2021-11-20 07:43:11,079 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 102 treesize of output 100 [2021-11-20 07:43:13,590 INFO L354 Elim1Store]: treesize reduction 522, result has 0.2 percent of original size [2021-11-20 07:43:13,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 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 [2021-11-20 07:43:13,759 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 17 treesize of output 19 [2021-11-20 07:43:13,901 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 2 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:43:13,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:43:37,601 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 118 treesize of output 116 [2021-11-20 07:43:37,610 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 56174 treesize of output 56172 [2021-11-20 07:43:40,559 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 2 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:43:40,559 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:43:40,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1924150637] [2021-11-20 07:43:40,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1924150637] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:43:40,560 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:43:40,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 52 [2021-11-20 07:43:40,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939231637] [2021-11-20 07:43:40,560 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:43:40,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-20 07:43:40,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:43:40,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-20 07:43:40,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=507, Invalid=2243, Unknown=6, NotChecked=0, Total=2756 [2021-11-20 07:43:40,563 INFO L87 Difference]: Start difference. First operand 199 states and 236 transitions. Second operand has 53 states, 52 states have (on average 2.076923076923077) internal successors, (108), 52 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:43:51,643 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 07:43:54,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:43:54,881 INFO L93 Difference]: Finished difference Result 203 states and 239 transitions. [2021-11-20 07:43:54,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-20 07:43:54,882 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 2.076923076923077) internal successors, (108), 52 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 61 [2021-11-20 07:43:54,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:43:54,888 INFO L225 Difference]: With dead ends: 203 [2021-11-20 07:43:54,888 INFO L226 Difference]: Without dead ends: 203 [2021-11-20 07:43:54,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 65 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 30.0s TimeCoverageRelationStatistics Valid=692, Invalid=2842, Unknown=6, NotChecked=0, Total=3540 [2021-11-20 07:43:54,890 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 377 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 1708 mSolverCounterSat, 182 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 1324 SdHoareTripleChecker+Invalid, 1957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1708 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:43:54,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 1324 Invalid, 1957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 1708 Invalid, 1 Unknown, 66 Unchecked, 11.5s Time] [2021-11-20 07:43:54,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-20 07:43:54,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 199. [2021-11-20 07:43:54,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 167 states have (on average 1.2874251497005988) internal successors, (215), 181 states have internal predecessors, (215), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-20 07:43:54,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 235 transitions. [2021-11-20 07:43:54,897 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 235 transitions. Word has length 61 [2021-11-20 07:43:54,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:43:54,898 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 235 transitions. [2021-11-20 07:43:54,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 2.076923076923077) internal successors, (108), 52 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:43:54,898 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 235 transitions. [2021-11-20 07:43:54,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-20 07:43:54,899 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:43:54,900 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:43:54,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-20 07:43:55,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:43:55,113 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-20 07:43:55,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:43:55,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1186835656, now seen corresponding path program 1 times [2021-11-20 07:43:55,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:43:55,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277308023] [2021-11-20 07:43:55,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:43:55,115 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:43:55,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:43:55,116 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:43:55,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-20 07:43:55,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:43:55,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 07:43:55,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:43:55,633 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 [2021-11-20 07:43:55,976 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 15 treesize of output 7 [2021-11-20 07:43:56,012 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-11-20 07:43:56,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:43:56,439 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-20 07:43:56,439 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:43:56,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277308023] [2021-11-20 07:43:56,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277308023] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:43:56,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:43:56,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2021-11-20 07:43:56,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828751080] [2021-11-20 07:43:56,440 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:43:56,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:43:56,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:43:56,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:43:56,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:43:56,442 INFO L87 Difference]: Start difference. First operand 199 states and 235 transitions. Second operand has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:43:57,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:43:57,959 INFO L93 Difference]: Finished difference Result 287 states and 338 transitions. [2021-11-20 07:43:57,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 07:43:57,959 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 63 [2021-11-20 07:43:57,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:43:57,961 INFO L225 Difference]: With dead ends: 287 [2021-11-20 07:43:57,962 INFO L226 Difference]: Without dead ends: 287 [2021-11-20 07:43:57,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=169, Invalid=1091, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 07:43:57,963 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 176 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:43:57,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 847 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 319 Invalid, 0 Unknown, 32 Unchecked, 0.7s Time] [2021-11-20 07:43:57,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-20 07:43:57,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 207. [2021-11-20 07:43:57,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 175 states have (on average 1.2857142857142858) internal successors, (225), 189 states have internal predecessors, (225), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-20 07:43:57,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 245 transitions. [2021-11-20 07:43:57,973 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 245 transitions. Word has length 63 [2021-11-20 07:43:57,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:43:57,973 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 245 transitions. [2021-11-20 07:43:57,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:43:57,974 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 245 transitions. [2021-11-20 07:43:57,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-20 07:43:57,975 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:43:57,975 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:43:57,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-20 07:43:58,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:43:58,199 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-20 07:43:58,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:43:58,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1862800429, now seen corresponding path program 1 times [2021-11-20 07:43:58,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:43:58,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1187490664] [2021-11-20 07:43:58,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:43:58,201 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:43:58,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:43:58,202 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:43:58,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-20 07:43:58,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:43:58,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 07:43:58,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:43:59,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-20 07:44:00,318 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 15 treesize of output 7 [2021-11-20 07:44:00,459 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-20 07:44:00,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:44:01,223 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-20 07:44:01,223 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:44:01,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1187490664] [2021-11-20 07:44:01,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1187490664] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:44:01,223 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:44:01,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 22 [2021-11-20 07:44:01,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408251693] [2021-11-20 07:44:01,224 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:44:01,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 07:44:01,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:44:01,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 07:44:01,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-11-20 07:44:01,231 INFO L87 Difference]: Start difference. First operand 207 states and 245 transitions. Second operand has 23 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 20 states have internal predecessors, (59), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 07:44:02,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:44:02,032 INFO L93 Difference]: Finished difference Result 273 states and 316 transitions. [2021-11-20 07:44:02,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 07:44:02,033 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 20 states have internal predecessors, (59), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 64 [2021-11-20 07:44:02,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:44:02,035 INFO L225 Difference]: With dead ends: 273 [2021-11-20 07:44:02,036 INFO L226 Difference]: Without dead ends: 273 [2021-11-20 07:44:02,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-11-20 07:44:02,037 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 59 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:44:02,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 723 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 154 Invalid, 0 Unknown, 149 Unchecked, 0.5s Time] [2021-11-20 07:44:02,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-11-20 07:44:02,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 231. [2021-11-20 07:44:02,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 195 states have (on average 1.2923076923076924) internal successors, (252), 211 states have internal predecessors, (252), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (15), 11 states have call predecessors, (15), 8 states have call successors, (15) [2021-11-20 07:44:02,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 275 transitions. [2021-11-20 07:44:02,047 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 275 transitions. Word has length 64 [2021-11-20 07:44:02,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:44:02,048 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 275 transitions. [2021-11-20 07:44:02,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 20 states have internal predecessors, (59), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 07:44:02,048 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 275 transitions. [2021-11-20 07:44:02,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-20 07:44:02,049 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:44:02,050 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:44:02,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-20 07:44:02,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:44:02,284 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-20 07:44:02,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:44:02,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1942055474, now seen corresponding path program 1 times [2021-11-20 07:44:02,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:44:02,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [120667044] [2021-11-20 07:44:02,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:44:02,285 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:44:02,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:44:02,286 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:44:02,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-20 07:44:02,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:44:02,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-20 07:44:02,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:44:02,609 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:44:02,609 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 24 treesize of output 24 [2021-11-20 07:44:02,903 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 [2021-11-20 07:44:03,156 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-20 07:44:03,156 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 25 treesize of output 24 [2021-11-20 07:44:03,486 INFO L354 Elim1Store]: treesize reduction 72, result has 20.9 percent of original size [2021-11-20 07:44:03,486 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 34 treesize of output 36 [2021-11-20 07:44:03,951 INFO L354 Elim1Store]: treesize reduction 141, result has 18.0 percent of original size [2021-11-20 07:44:03,951 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 46 treesize of output 51 [2021-11-20 07:44:04,542 INFO L354 Elim1Store]: treesize reduction 192, result has 16.2 percent of original size [2021-11-20 07:44:04,542 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 52 treesize of output 60 [2021-11-20 07:44:05,242 INFO L354 Elim1Store]: treesize reduction 270, result has 14.6 percent of original size [2021-11-20 07:44:05,242 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 61 treesize of output 72 [2021-11-20 07:44:06,101 INFO L354 Elim1Store]: treesize reduction 360, result has 13.3 percent of original size [2021-11-20 07:44:06,101 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 70 treesize of output 84 [2021-11-20 07:44:07,125 INFO L354 Elim1Store]: treesize reduction 489, result has 12.1 percent of original size [2021-11-20 07:44:07,125 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 82 treesize of output 99 [2021-11-20 07:44:08,328 INFO L354 Elim1Store]: treesize reduction 544, result has 11.8 percent of original size [2021-11-20 07:44:08,328 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 [2021-11-20 07:44:33,641 INFO L354 Elim1Store]: treesize reduction 432, result has 0.2 percent of original size [2021-11-20 07:44:33,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 91 treesize of output 31 [2021-11-20 07:44:33,848 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:44:33,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:44:59,413 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 80 treesize of output 78 [2021-11-20 07:44:59,419 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 13292 treesize of output 13288 [2021-11-20 07:45:02,263 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 100 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:45:02,263 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:45:02,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [120667044] [2021-11-20 07:45:02,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [120667044] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:45:02,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:45:02,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24] total 51 [2021-11-20 07:45:02,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375968407] [2021-11-20 07:45:02,264 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:45:02,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-20 07:45:02,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:45:02,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-20 07:45:02,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=604, Invalid=2040, Unknown=8, NotChecked=0, Total=2652 [2021-11-20 07:45:02,267 INFO L87 Difference]: Start difference. First operand 231 states and 275 transitions. Second operand has 52 states, 51 states have (on average 2.2941176470588234) internal successors, (117), 52 states have internal predecessors, (117), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:45:02,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:45:02,833 INFO L93 Difference]: Finished difference Result 240 states and 287 transitions. [2021-11-20 07:45:02,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-20 07:45:02,833 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 2.2941176470588234) internal successors, (117), 52 states have internal predecessors, (117), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 63 [2021-11-20 07:45:02,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:45:02,835 INFO L225 Difference]: With dead ends: 240 [2021-11-20 07:45:02,835 INFO L226 Difference]: Without dead ends: 240 [2021-11-20 07:45:02,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 51.9s TimeCoverageRelationStatistics Valid=611, Invalid=2137, Unknown=8, NotChecked=0, Total=2756 [2021-11-20 07:45:02,837 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 75 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:45:02,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 647 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 110 Unchecked, 0.2s Time] [2021-11-20 07:45:02,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-11-20 07:45:02,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 238. [2021-11-20 07:45:02,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 202 states have (on average 1.306930693069307) internal successors, (264), 218 states have internal predecessors, (264), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (15), 11 states have call predecessors, (15), 8 states have call successors, (15) [2021-11-20 07:45:02,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 287 transitions. [2021-11-20 07:45:02,848 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 287 transitions. Word has length 63 [2021-11-20 07:45:02,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:45:02,848 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 287 transitions. [2021-11-20 07:45:02,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 2.2941176470588234) internal successors, (117), 52 states have internal predecessors, (117), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:45:02,849 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 287 transitions. [2021-11-20 07:45:02,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-20 07:45:02,850 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:45:02,850 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:45:02,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-20 07:45:03,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:45:03,066 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-20 07:45:03,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:45:03,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1453976204, now seen corresponding path program 2 times [2021-11-20 07:45:03,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:45:03,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2105888066] [2021-11-20 07:45:03,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:45:03,067 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:45:03,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:45:03,068 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:45:03,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-20 07:45:03,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:45:03,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:45:03,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:45:03,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:45:03,381 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-20 07:45:03,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:45:03,574 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-20 07:45:03,575 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:45:03,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2105888066] [2021-11-20 07:45:03,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2105888066] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 07:45:03,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:45:03,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-20 07:45:03,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138331581] [2021-11-20 07:45:03,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:45:03,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:45:03,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:45:03,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:45:03,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:45:03,576 INFO L87 Difference]: Start difference. First operand 238 states and 287 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:45:03,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:45:03,610 INFO L93 Difference]: Finished difference Result 207 states and 233 transitions. [2021-11-20 07:45:03,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:45:03,612 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 64 [2021-11-20 07:45:03,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:45:03,613 INFO L225 Difference]: With dead ends: 207 [2021-11-20 07:45:03,614 INFO L226 Difference]: Without dead ends: 207 [2021-11-20 07:45:03,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:45:03,615 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 36 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:45:03,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 240 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:45:03,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-20 07:45:03,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 166. [2021-11-20 07:45:03,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 138 states have (on average 1.2463768115942029) internal successors, (172), 152 states have internal predecessors, (172), 5 states have call successors, (5), 5 states have call predecessors, (5), 9 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-20 07:45:03,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 186 transitions. [2021-11-20 07:45:03,622 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 186 transitions. Word has length 64 [2021-11-20 07:45:03,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:45:03,623 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 186 transitions. [2021-11-20 07:45:03,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:45:03,623 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 186 transitions. [2021-11-20 07:45:03,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-20 07:45:03,624 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:45:03,625 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:45:03,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-20 07:45:03,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:45:03,840 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-20 07:45:03,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:45:03,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1912238554, now seen corresponding path program 1 times [2021-11-20 07:45:03,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:45:03,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1678522761] [2021-11-20 07:45:03,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:45:03,841 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:45:03,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:45:03,842 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:45:03,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-20 07:45:04,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:45:04,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 07:45:04,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:45:04,362 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 [2021-11-20 07:45:04,568 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 27 treesize of output 23 [2021-11-20 07:45:04,722 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 18 treesize of output 12 [2021-11-20 07:45:04,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-11-20 07:45:04,996 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-20 07:45:04,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:45:05,985 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-20 07:45:05,986 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:45:05,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1678522761] [2021-11-20 07:45:05,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1678522761] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:45:05,986 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:45:05,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 19 [2021-11-20 07:45:05,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690417662] [2021-11-20 07:45:05,987 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:45:05,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 07:45:05,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:45:05,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 07:45:05,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:45:05,989 INFO L87 Difference]: Start difference. First operand 166 states and 186 transitions. Second operand has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:45:08,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:45:08,723 INFO L93 Difference]: Finished difference Result 218 states and 237 transitions. [2021-11-20 07:45:08,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 07:45:08,724 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 65 [2021-11-20 07:45:08,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:45:08,726 INFO L225 Difference]: With dead ends: 218 [2021-11-20 07:45:08,726 INFO L226 Difference]: Without dead ends: 218 [2021-11-20 07:45:08,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=188, Invalid=1294, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 07:45:08,728 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 225 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:45:08,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 629 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 581 Invalid, 0 Unknown, 60 Unchecked, 1.5s Time] [2021-11-20 07:45:08,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-11-20 07:45:08,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 167. [2021-11-20 07:45:08,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 139 states have (on average 1.2446043165467626) internal successors, (173), 153 states have internal predecessors, (173), 5 states have call successors, (5), 5 states have call predecessors, (5), 9 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-20 07:45:08,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 187 transitions. [2021-11-20 07:45:08,735 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 187 transitions. Word has length 65 [2021-11-20 07:45:08,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:45:08,735 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 187 transitions. [2021-11-20 07:45:08,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 07:45:08,736 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 187 transitions. [2021-11-20 07:45:08,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-20 07:45:08,737 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:45:08,737 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:45:08,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-20 07:45:08,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:45:08,951 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-20 07:45:08,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:45:08,951 INFO L85 PathProgramCache]: Analyzing trace with hash -74177422, now seen corresponding path program 1 times [2021-11-20 07:45:08,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:45:08,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [91875520] [2021-11-20 07:45:08,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:45:08,952 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:45:08,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:45:08,953 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:45:08,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-20 07:45:09,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:45:09,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-20 07:45:09,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:45:09,161 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 [2021-11-20 07:45:09,282 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-20 07:45:09,283 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 25 treesize of output 24 [2021-11-20 07:45:09,498 INFO L354 Elim1Store]: treesize reduction 84, result has 20.8 percent of original size [2021-11-20 07:45:09,498 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 37 treesize of output 39 [2021-11-20 07:45:09,788 INFO L354 Elim1Store]: treesize reduction 126, result has 18.2 percent of original size [2021-11-20 07:45:09,789 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 43 treesize of output 48 [2021-11-20 07:45:10,182 INFO L354 Elim1Store]: treesize reduction 192, result has 16.2 percent of original size [2021-11-20 07:45:10,183 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 52 treesize of output 60 [2021-11-20 07:45:10,707 INFO L354 Elim1Store]: treesize reduction 291, result has 14.4 percent of original size [2021-11-20 07:45:10,708 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 64 treesize of output 75 [2021-11-20 07:45:11,291 INFO L354 Elim1Store]: treesize reduction 360, result has 13.3 percent of original size [2021-11-20 07:45:11,291 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 70 treesize of output 84 [2021-11-20 07:45:12,005 INFO L354 Elim1Store]: treesize reduction 462, result has 12.2 percent of original size [2021-11-20 07:45:12,006 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 79 treesize of output 96 [2021-11-20 07:45:12,941 INFO L354 Elim1Store]: treesize reduction 544, result has 11.8 percent of original size [2021-11-20 07:45:12,941 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 [2021-11-20 07:45:40,831 INFO L354 Elim1Store]: treesize reduction 432, result has 0.2 percent of original size [2021-11-20 07:45:40,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 91 treesize of output 31 [2021-11-20 07:45:40,951 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 4 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:45:40,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:46:31,353 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 80 treesize of output 78 [2021-11-20 07:46:31,358 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 212 treesize of output 208 [2021-11-20 07:46:32,580 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 100 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:46:32,580 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:46:32,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [91875520] [2021-11-20 07:46:32,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [91875520] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:46:32,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:46:32,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-11-20 07:46:32,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881039863] [2021-11-20 07:46:32,581 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:46:32,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-20 07:46:32,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:46:32,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-20 07:46:32,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=1524, Unknown=27, NotChecked=0, Total=2070 [2021-11-20 07:46:32,584 INFO L87 Difference]: Start difference. First operand 167 states and 187 transitions. Second operand has 46 states, 45 states have (on average 2.422222222222222) internal successors, (109), 46 states have internal predecessors, (109), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:46:38,562 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 07:46:41,212 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 07:46:43,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:46:43,389 INFO L93 Difference]: Finished difference Result 220 states and 235 transitions. [2021-11-20 07:46:43,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-20 07:46:43,391 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.422222222222222) internal successors, (109), 46 states have internal predecessors, (109), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 64 [2021-11-20 07:46:43,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:46:43,393 INFO L225 Difference]: With dead ends: 220 [2021-11-20 07:46:43,393 INFO L226 Difference]: Without dead ends: 220 [2021-11-20 07:46:43,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 80.4s TimeCoverageRelationStatistics Valid=717, Invalid=2118, Unknown=27, NotChecked=0, Total=2862 [2021-11-20 07:46:43,394 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 374 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:46:43,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 783 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1017 Invalid, 0 Unknown, 35 Unchecked, 8.5s Time] [2021-11-20 07:46:43,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-20 07:46:43,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 174. [2021-11-20 07:46:43,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 146 states have (on average 1.2602739726027397) internal successors, (184), 160 states have internal predecessors, (184), 5 states have call successors, (5), 5 states have call predecessors, (5), 9 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-20 07:46:43,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 198 transitions. [2021-11-20 07:46:43,400 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 198 transitions. Word has length 64 [2021-11-20 07:46:43,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:46:43,400 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 198 transitions. [2021-11-20 07:46:43,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.422222222222222) internal successors, (109), 46 states have internal predecessors, (109), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:46:43,401 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 198 transitions. [2021-11-20 07:46:43,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-20 07:46:43,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:46:43,401 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:46:43,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-20 07:46:43,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:46:43,602 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-20 07:46:43,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:46:43,602 INFO L85 PathProgramCache]: Analyzing trace with hash -667550209, now seen corresponding path program 1 times [2021-11-20 07:46:43,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:46:43,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [36175730] [2021-11-20 07:46:43,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:46:43,603 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:46:43,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:46:43,604 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:46:43,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-20 07:46:43,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:46:43,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:46:43,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:46:44,107 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-11-20 07:46:44,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:46:44,536 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-11-20 07:46:44,536 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:46:44,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [36175730] [2021-11-20 07:46:44,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [36175730] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:46:44,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:46:44,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-20 07:46:44,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763660335] [2021-11-20 07:46:44,537 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:46:44,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:46:44,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:46:44,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:46:44,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:46:44,538 INFO L87 Difference]: Start difference. First operand 174 states and 198 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:46:45,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:46:45,070 INFO L93 Difference]: Finished difference Result 440 states and 500 transitions. [2021-11-20 07:46:45,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:46:45,071 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 66 [2021-11-20 07:46:45,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:46:45,073 INFO L225 Difference]: With dead ends: 440 [2021-11-20 07:46:45,073 INFO L226 Difference]: Without dead ends: 440 [2021-11-20 07:46:45,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:46:45,075 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 653 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:46:45,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [653 Valid, 544 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:46:45,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-11-20 07:46:45,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 188. [2021-11-20 07:46:45,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 158 states have (on average 1.2468354430379747) internal successors, (197), 172 states have internal predecessors, (197), 7 states have call successors, (7), 5 states have call predecessors, (7), 9 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-20 07:46:45,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 217 transitions. [2021-11-20 07:46:45,084 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 217 transitions. Word has length 66 [2021-11-20 07:46:45,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:46:45,084 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 217 transitions. [2021-11-20 07:46:45,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:46:45,085 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 217 transitions. [2021-11-20 07:46:45,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 07:46:45,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:46:45,086 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:46:45,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-11-20 07:46:45,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:46:45,299 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-20 07:46:45,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:46:45,299 INFO L85 PathProgramCache]: Analyzing trace with hash -947348014, now seen corresponding path program 1 times [2021-11-20 07:46:45,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:46:45,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2046048007] [2021-11-20 07:46:45,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:46:45,300 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:46:45,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:46:45,301 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:46:45,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-20 07:46:45,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:46:45,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 07:46:45,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:46:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-11-20 07:46:45,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:46:45,989 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-11-20 07:46:45,989 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:46:45,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2046048007] [2021-11-20 07:46:45,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2046048007] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:46:45,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:46:45,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-20 07:46:45,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790573960] [2021-11-20 07:46:45,990 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:46:45,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:46:45,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:46:45,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:46:45,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:46:45,992 INFO L87 Difference]: Start difference. First operand 188 states and 217 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:46:46,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:46:46,282 INFO L93 Difference]: Finished difference Result 243 states and 277 transitions. [2021-11-20 07:46:46,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:46:46,283 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 68 [2021-11-20 07:46:46,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:46:46,285 INFO L225 Difference]: With dead ends: 243 [2021-11-20 07:46:46,285 INFO L226 Difference]: Without dead ends: 243 [2021-11-20 07:46:46,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:46:46,286 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 217 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:46:46,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 422 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:46:46,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-11-20 07:46:46,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 194. [2021-11-20 07:46:46,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 164 states have (on average 1.2378048780487805) internal successors, (203), 178 states have internal predecessors, (203), 7 states have call successors, (7), 5 states have call predecessors, (7), 9 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-20 07:46:46,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 223 transitions. [2021-11-20 07:46:46,295 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 223 transitions. Word has length 68 [2021-11-20 07:46:46,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:46:46,295 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 223 transitions. [2021-11-20 07:46:46,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:46:46,296 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 223 transitions. [2021-11-20 07:46:46,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 07:46:46,297 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:46:46,297 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:46:46,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-20 07:46:46,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:46:46,513 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-20 07:46:46,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:46:46,513 INFO L85 PathProgramCache]: Analyzing trace with hash 2088707379, now seen corresponding path program 2 times [2021-11-20 07:46:46,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:46:46,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1750411796] [2021-11-20 07:46:46,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:46:46,514 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:46:46,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:46:46,515 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:46:46,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-20 07:46:46,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:46:46,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:46:46,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-20 07:46:46,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:46:46,950 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 [2021-11-20 07:46:47,137 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-20 07:46:47,138 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 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-20 07:46:47,418 INFO L354 Elim1Store]: treesize reduction 72, result has 20.9 percent of original size [2021-11-20 07:46:47,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2021-11-20 07:46:47,793 INFO L354 Elim1Store]: treesize reduction 126, result has 18.2 percent of original size [2021-11-20 07:46:47,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 48 [2021-11-20 07:46:48,280 INFO L354 Elim1Store]: treesize reduction 192, result has 16.2 percent of original size [2021-11-20 07:46:48,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 52 treesize of output 60 [2021-11-20 07:46:48,907 INFO L354 Elim1Store]: treesize reduction 291, result has 14.4 percent of original size [2021-11-20 07:46:48,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 64 treesize of output 75 [2021-11-20 07:46:49,677 INFO L354 Elim1Store]: treesize reduction 360, result has 13.3 percent of original size [2021-11-20 07:46:49,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 70 treesize of output 84 [2021-11-20 07:46:50,612 INFO L354 Elim1Store]: treesize reduction 462, result has 12.2 percent of original size [2021-11-20 07:46:50,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 79 treesize of output 96 [2021-11-20 07:46:51,709 INFO L354 Elim1Store]: treesize reduction 544, result has 11.8 percent of original size [2021-11-20 07:46:51,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 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 [2021-11-20 07:47:23,518 INFO L354 Elim1Store]: treesize reduction 432, result has 0.2 percent of original size [2021-11-20 07:47:23,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 91 treesize of output 31 [2021-11-20 07:47:23,695 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 15 treesize of output 17 [2021-11-20 07:47:23,860 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 2 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:47:23,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:47:24,147 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 33 treesize of output 29 [2021-11-20 07:48:17,758 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 81 treesize of output 79 [2021-11-20 07:48:17,765 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 14188 treesize of output 14184 [2021-11-20 07:48:20,456 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:48:20,456 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:48:20,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1750411796] [2021-11-20 07:48:20,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1750411796] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:48:20,456 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:48:20,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 51 [2021-11-20 07:48:20,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523199631] [2021-11-20 07:48:20,457 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:48:20,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-20 07:48:20,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:48:20,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-20 07:48:20,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=2168, Unknown=32, NotChecked=0, Total=2652 [2021-11-20 07:48:20,459 INFO L87 Difference]: Start difference. First operand 194 states and 223 transitions. Second operand has 52 states, 51 states have (on average 2.3333333333333335) internal successors, (119), 51 states have internal predecessors, (119), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:48:25,367 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 07:48:27,595 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 07:48:29,631 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 07:48:38,447 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 07:48:42,784 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 07:48:47,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:48:47,377 INFO L93 Difference]: Finished difference Result 234 states and 255 transitions. [2021-11-20 07:48:47,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-20 07:48:47,379 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 2.3333333333333335) internal successors, (119), 51 states have internal predecessors, (119), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 67 [2021-11-20 07:48:47,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:48:47,380 INFO L225 Difference]: With dead ends: 234 [2021-11-20 07:48:47,380 INFO L226 Difference]: Without dead ends: 234 [2021-11-20 07:48:47,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 93.0s TimeCoverageRelationStatistics Valid=819, Invalid=3704, Unknown=33, NotChecked=0, Total=4556 [2021-11-20 07:48:47,383 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 732 mSDsluCounter, 1283 mSDsCounter, 0 mSdLazyCounter, 1391 mSolverCounterSat, 203 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 1330 SdHoareTripleChecker+Invalid, 1646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1391 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 19.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:48:47,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [734 Valid, 1330 Invalid, 1646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1391 Invalid, 4 Unknown, 48 Unchecked, 19.4s Time] [2021-11-20 07:48:47,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-20 07:48:47,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 194. [2021-11-20 07:48:47,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 164 states have (on average 1.225609756097561) internal successors, (201), 178 states have internal predecessors, (201), 7 states have call successors, (7), 5 states have call predecessors, (7), 9 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-20 07:48:47,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 221 transitions. [2021-11-20 07:48:47,390 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 221 transitions. Word has length 67 [2021-11-20 07:48:47,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:48:47,391 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 221 transitions. [2021-11-20 07:48:47,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 2.3333333333333335) internal successors, (119), 51 states have internal predecessors, (119), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:48:47,391 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 221 transitions. [2021-11-20 07:48:47,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 07:48:47,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:48:47,392 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:48:47,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-20 07:48:47,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:48:47,616 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-20 07:48:47,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:48:47,616 INFO L85 PathProgramCache]: Analyzing trace with hash 2088707380, now seen corresponding path program 1 times [2021-11-20 07:48:47,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:48:47,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1328374971] [2021-11-20 07:48:47,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:48:47,617 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:48:47,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:48:47,618 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:48:47,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-20 07:48:47,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:48:47,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 07:48:47,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:48:47,761 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 [2021-11-20 07:48:48,624 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-20 07:48:48,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:48:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-20 07:48:51,493 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:48:51,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1328374971] [2021-11-20 07:48:51,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1328374971] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:48:51,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:48:51,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-11-20 07:48:51,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196746210] [2021-11-20 07:48:51,494 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:48:51,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 07:48:51,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:48:51,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 07:48:51,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:48:51,496 INFO L87 Difference]: Start difference. First operand 194 states and 221 transitions. Second operand has 20 states, 17 states have (on average 4.176470588235294) internal successors, (71), 18 states have internal predecessors, (71), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:48:54,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:48:54,910 INFO L93 Difference]: Finished difference Result 267 states and 287 transitions. [2021-11-20 07:48:54,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 07:48:54,912 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 4.176470588235294) internal successors, (71), 18 states have internal predecessors, (71), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 67 [2021-11-20 07:48:54,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:48:54,914 INFO L225 Difference]: With dead ends: 267 [2021-11-20 07:48:54,914 INFO L226 Difference]: Without dead ends: 267 [2021-11-20 07:48:54,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2021-11-20 07:48:54,915 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 504 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:48:54,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [507 Valid, 548 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 313 Invalid, 0 Unknown, 188 Unchecked, 1.6s Time] [2021-11-20 07:48:54,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-11-20 07:48:54,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 203. [2021-11-20 07:48:54,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 173 states have (on average 1.2427745664739884) internal successors, (215), 187 states have internal predecessors, (215), 7 states have call successors, (7), 5 states have call predecessors, (7), 9 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-20 07:48:54,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 235 transitions. [2021-11-20 07:48:54,927 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 235 transitions. Word has length 67 [2021-11-20 07:48:54,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:48:54,928 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 235 transitions. [2021-11-20 07:48:54,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 4.176470588235294) internal successors, (71), 18 states have internal predecessors, (71), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:48:54,929 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 235 transitions. [2021-11-20 07:48:54,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 07:48:54,929 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:48:54,930 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:48:54,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-20 07:48:55,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:48:55,136 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 14 more)] === [2021-11-20 07:48:55,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:48:55,136 INFO L85 PathProgramCache]: Analyzing trace with hash 325419371, now seen corresponding path program 1 times [2021-11-20 07:48:55,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:48:55,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1659049497] [2021-11-20 07:48:55,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:48:55,137 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:48:55,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:48:55,138 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:48:55,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfe51746-e147-4a56-ab22-7a0e2583ef80/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-20 07:48:55,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:48:55,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-20 07:48:55,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:48:55,380 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 [2021-11-20 07:48:55,507 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-20 07:48:55,507 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 [2021-11-20 07:48:55,727 INFO L354 Elim1Store]: treesize reduction 72, result has 20.9 percent of original size [2021-11-20 07:48:55,728 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 34 treesize of output 36 [2021-11-20 07:48:56,042 INFO L354 Elim1Store]: treesize reduction 141, result has 18.0 percent of original size [2021-11-20 07:48:56,043 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 46 treesize of output 51 [2021-11-20 07:48:56,436 INFO L354 Elim1Store]: treesize reduction 192, result has 16.2 percent of original size [2021-11-20 07:48:56,436 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 52 treesize of output 60 [2021-11-20 07:48:56,931 INFO L354 Elim1Store]: treesize reduction 291, result has 14.4 percent of original size [2021-11-20 07:48:56,931 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 64 treesize of output 75 [2021-11-20 07:48:57,674 INFO L354 Elim1Store]: treesize reduction 408, result has 13.0 percent of original size [2021-11-20 07:48:57,674 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 76 treesize of output 90 [2021-11-20 07:48:58,528 INFO L354 Elim1Store]: treesize reduction 434, result has 12.9 percent of original size [2021-11-20 07:48:58,528 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 [2021-11-20 07:49:20,653 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-20 07:49:20,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 82 treesize of output 28 [2021-11-20 07:49:20,802 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:49:20,803 INFO L328 TraceCheckSpWp]: Computing backward predicates...