./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY --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 fa6de94809ad211882523114a33a27b3a82ed66d6bff27089fdf2c6fcaa93aae --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:58:27,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:58:27,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:58:27,232 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:58:27,233 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:58:27,235 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:58:27,237 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:58:27,240 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:58:27,243 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:58:27,244 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:58:27,246 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:58:27,248 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:58:27,249 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:58:27,251 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:58:27,253 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:58:27,255 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:58:27,256 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:58:27,258 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:58:27,261 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:58:27,264 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:58:27,267 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:58:27,269 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:58:27,271 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:58:27,272 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:58:27,277 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:58:27,278 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:58:27,278 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:58:27,280 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:58:27,281 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:58:27,287 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:58:27,287 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:58:27,289 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:58:27,290 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:58:27,293 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:58:27,295 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:58:27,296 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:58:27,298 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:58:27,299 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:58:27,299 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:58:27,300 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:58:27,302 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:58:27,303 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-07 07:58:27,359 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:58:27,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:58:27,360 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:58:27,361 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:58:27,362 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:58:27,363 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:58:27,363 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:58:27,363 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:58:27,364 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:58:27,364 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 07:58:27,364 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:58:27,364 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:58:27,365 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:58:27,365 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 07:58:27,365 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 07:58:27,366 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 07:58:27,366 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:58:27,366 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 07:58:27,367 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:58:27,367 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:58:27,367 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:58:27,368 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:58:27,368 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:58:27,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:58:27,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:58:27,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:58:27,369 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:58:27,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:58:27,370 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:58:27,370 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_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa6de94809ad211882523114a33a27b3a82ed66d6bff27089fdf2c6fcaa93aae [2021-11-07 07:58:27,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:58:27,748 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:58:27,752 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:58:27,754 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:58:27,755 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:58:27,756 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i [2021-11-07 07:58:27,842 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/data/0257d2b96/b628e3c1efcc4c9396a615001ef6bab5/FLAG0df73e80a [2021-11-07 07:58:28,550 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:58:28,551 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i [2021-11-07 07:58:28,572 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/data/0257d2b96/b628e3c1efcc4c9396a615001ef6bab5/FLAG0df73e80a [2021-11-07 07:58:28,733 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/data/0257d2b96/b628e3c1efcc4c9396a615001ef6bab5 [2021-11-07 07:58:28,735 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:58:28,737 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-07 07:58:28,739 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:58:28,739 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:58:28,743 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:58:28,744 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:58:28" (1/1) ... [2021-11-07 07:58:28,745 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b4bea76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:58:28, skipping insertion in model container [2021-11-07 07:58:28,745 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:58:28" (1/1) ... [2021-11-07 07:58:28,751 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:58:28,847 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:58:29,406 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i[33022,33035] [2021-11-07 07:58:29,777 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:58:29,790 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 07:58:29,791 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@70c67d88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:58:29, skipping insertion in model container [2021-11-07 07:58:29,791 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:58:29,791 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.preprocessor [2021-11-07 07:58:29,794 INFO L168 Benchmark]: Toolchain (without parser) took 1055.85 ms. Allocated memory is still 90.2 MB. Free memory was 50.9 MB in the beginning and 48.0 MB in the end (delta: 2.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 07:58:29,795 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 90.2 MB. Free memory is still 71.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 07:58:29,796 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1052.68 ms. Allocated memory is still 90.2 MB. Free memory was 50.7 MB in the beginning and 48.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 07:58:29,799 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 90.2 MB. Free memory is still 71.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1052.68 ms. Allocated memory is still 90.2 MB. Free memory was 50.7 MB in the beginning and 48.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 734]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY --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 fa6de94809ad211882523114a33a27b3a82ed66d6bff27089fdf2c6fcaa93aae --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:58:32,437 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:58:32,440 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:58:32,498 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:58:32,499 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:58:32,500 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:58:32,503 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:58:32,506 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:58:32,509 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:58:32,510 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:58:32,512 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:58:32,514 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:58:32,515 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:58:32,517 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:58:32,519 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:58:32,521 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:58:32,522 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:58:32,524 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:58:32,526 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:58:32,529 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:58:32,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:58:32,534 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:58:32,535 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:58:32,537 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:58:32,541 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:58:32,542 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:58:32,543 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:58:32,544 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:58:32,545 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:58:32,547 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:58:32,547 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:58:32,548 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:58:32,550 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:58:32,551 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:58:32,553 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:58:32,554 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:58:32,555 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:58:32,555 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:58:32,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:58:32,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:58:32,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:58:32,560 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-07 07:58:32,611 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:58:32,611 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:58:32,612 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:58:32,612 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:58:32,616 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:58:32,616 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:58:32,617 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:58:32,617 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:58:32,617 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:58:32,617 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 07:58:32,617 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:58:32,618 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:58:32,618 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:58:32,618 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 07:58:32,618 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 07:58:32,618 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 07:58:32,619 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:58:32,619 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 07:58:32,619 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 07:58:32,619 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 07:58:32,619 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:58:32,619 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:58:32,620 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:58:32,620 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:58:32,620 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:58:32,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:58:32,620 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:58:32,620 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:58:32,620 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-07 07:58:32,621 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 07:58:32,621 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:58:32,621 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 07:58:32,621 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_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa6de94809ad211882523114a33a27b3a82ed66d6bff27089fdf2c6fcaa93aae [2021-11-07 07:58:33,099 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:58:33,126 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:58:33,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:58:33,131 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:58:33,132 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:58:33,133 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i [2021-11-07 07:58:33,249 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/data/16cf15145/60d9a9ec7b814a2a800a5f1962bf4744/FLAG49c4ce76a [2021-11-07 07:58:34,154 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:58:34,157 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i [2021-11-07 07:58:34,197 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/data/16cf15145/60d9a9ec7b814a2a800a5f1962bf4744/FLAG49c4ce76a [2021-11-07 07:58:34,686 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/data/16cf15145/60d9a9ec7b814a2a800a5f1962bf4744 [2021-11-07 07:58:34,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:58:34,692 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-07 07:58:34,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:58:34,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:58:34,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:58:34,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:58:34" (1/1) ... [2021-11-07 07:58:34,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e064040 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:58:34, skipping insertion in model container [2021-11-07 07:58:34,704 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:58:34" (1/1) ... [2021-11-07 07:58:34,712 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:58:34,802 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:58:35,415 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i[33022,33035] [2021-11-07 07:58:35,825 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:58:35,850 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 07:58:35,884 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:58:35,918 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i[33022,33035] [2021-11-07 07:58:36,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:58:36,163 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:58:36,194 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test10-3.i[33022,33035] [2021-11-07 07:58:36,402 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:58:36,470 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:58:36,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:58:36 WrapperNode [2021-11-07 07:58:36,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:58:36,473 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:58:36,473 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:58:36,473 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:58:36,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:58:36" (1/1) ... [2021-11-07 07:58:36,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:58:36" (1/1) ... [2021-11-07 07:58:36,570 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:58:36" (1/1) ... [2021-11-07 07:58:36,571 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:58:36" (1/1) ... [2021-11-07 07:58:36,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:58:36" (1/1) ... [2021-11-07 07:58:36,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:58:36" (1/1) ... [2021-11-07 07:58:36,807 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:58:36" (1/1) ... [2021-11-07 07:58:36,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:58:36,846 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:58:36,847 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:58:36,847 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:58:36,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:58:36" (1/1) ... [2021-11-07 07:58:36,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:58:36,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:58:36,891 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:58:36,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:58:36,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-07 07:58:36,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:58:36,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-11-07 07:58:36,964 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-07 07:58:36,964 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-07 07:58:36,964 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-07 07:58:36,965 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-07 07:58:36,965 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-07 07:58:36,965 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-07 07:58:36,965 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-07 07:58:36,966 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2021-11-07 07:58:36,966 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-07 07:58:36,966 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-07 07:58:36,966 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2021-11-07 07:58:36,966 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2021-11-07 07:58:36,967 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2021-11-07 07:58:36,967 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2021-11-07 07:58:36,967 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-07 07:58:36,967 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2021-11-07 07:58:36,968 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2021-11-07 07:58:36,968 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-07 07:58:36,968 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2021-11-07 07:58:36,968 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2021-11-07 07:58:36,968 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2021-11-07 07:58:36,969 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-07 07:58:36,969 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2021-11-07 07:58:36,969 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2021-11-07 07:58:36,969 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2021-11-07 07:58:36,970 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2021-11-07 07:58:36,970 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2021-11-07 07:58:36,970 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2021-11-07 07:58:36,970 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2021-11-07 07:58:36,970 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-11-07 07:58:36,971 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2021-11-07 07:58:36,971 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2021-11-07 07:58:36,971 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2021-11-07 07:58:36,971 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2021-11-07 07:58:36,972 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2021-11-07 07:58:36,973 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2021-11-07 07:58:36,973 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2021-11-07 07:58:36,974 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2021-11-07 07:58:36,974 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2021-11-07 07:58:36,974 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2021-11-07 07:58:36,974 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2021-11-07 07:58:36,975 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2021-11-07 07:58:36,975 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2021-11-07 07:58:36,975 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2021-11-07 07:58:36,976 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2021-11-07 07:58:36,976 INFO L130 BoogieDeclarations]: Found specification of procedure index [2021-11-07 07:58:36,976 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2021-11-07 07:58:36,976 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2021-11-07 07:58:36,976 INFO L130 BoogieDeclarations]: Found specification of procedure ffsl [2021-11-07 07:58:36,977 INFO L130 BoogieDeclarations]: Found specification of procedure ffsll [2021-11-07 07:58:36,977 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2021-11-07 07:58:36,977 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2021-11-07 07:58:36,977 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp_l [2021-11-07 07:58:36,978 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp_l [2021-11-07 07:58:36,978 INFO L130 BoogieDeclarations]: Found specification of procedure explicit_bzero [2021-11-07 07:58:36,978 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2021-11-07 07:58:36,980 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2021-11-07 07:58:36,981 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2021-11-07 07:58:36,981 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2021-11-07 07:58:36,982 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2021-11-07 07:58:36,982 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2021-11-07 07:58:36,982 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-07 07:58:36,983 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-07 07:58:36,983 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-07 07:58:36,983 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-07 07:58:36,983 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-07 07:58:36,984 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-07 07:58:36,984 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-07 07:58:36,984 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-07 07:58:36,984 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-07 07:58:36,984 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-07 07:58:36,985 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-07 07:58:36,985 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-07 07:58:36,986 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-07 07:58:36,986 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-07 07:58:36,986 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-07 07:58:36,987 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-07 07:58:36,987 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-07 07:58:36,987 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-07 07:58:36,987 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-07 07:58:36,987 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-07 07:58:36,988 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-07 07:58:36,988 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-07 07:58:36,988 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-07 07:58:36,989 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-07 07:58:36,989 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-07 07:58:36,989 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-07 07:58:36,989 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-07 07:58:36,989 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-07 07:58:36,990 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-07 07:58:36,990 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-07 07:58:36,990 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-07 07:58:36,990 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-07 07:58:36,991 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-07 07:58:36,991 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-07 07:58:36,991 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-07 07:58:36,992 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-07 07:58:36,992 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-07 07:58:36,992 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-07 07:58:36,992 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-07 07:58:36,992 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-07 07:58:36,993 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-07 07:58:36,993 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-07 07:58:36,993 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-07 07:58:36,993 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-07 07:58:36,993 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-07 07:58:36,994 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-07 07:58:36,994 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-07 07:58:36,994 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-07 07:58:36,995 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-07 07:58:36,995 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-07 07:58:36,995 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-07 07:58:36,995 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-07 07:58:36,996 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-07 07:58:36,996 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-07 07:58:36,996 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-07 07:58:36,997 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-07 07:58:36,998 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-07 07:58:37,001 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-07 07:58:37,001 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-07 07:58:37,002 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-07 07:58:37,003 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-07 07:58:37,004 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-07 07:58:37,005 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-07 07:58:37,005 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-07 07:58:37,005 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-07 07:58:37,007 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-07 07:58:37,012 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-07 07:58:37,013 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-07 07:58:37,013 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-07 07:58:37,013 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-07 07:58:37,013 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-07 07:58:37,013 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-07 07:58:37,014 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-07 07:58:37,014 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-07 07:58:37,014 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-07 07:58:37,014 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-07 07:58:37,014 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-07 07:58:37,015 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-07 07:58:37,015 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-07 07:58:37,015 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-07 07:58:37,015 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-07 07:58:37,015 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-07 07:58:37,015 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-07 07:58:37,016 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-07 07:58:37,016 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-07 07:58:37,016 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-07 07:58:37,016 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-07 07:58:37,016 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-07 07:58:37,016 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-07 07:58:37,017 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-07 07:58:37,017 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-07 07:58:37,017 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-07 07:58:37,017 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-07 07:58:37,017 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-07 07:58:37,018 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-07 07:58:37,018 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-07 07:58:37,018 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-07 07:58:37,018 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-07 07:58:37,018 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-07 07:58:37,018 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-07 07:58:37,019 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-07 07:58:37,019 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-07 07:58:37,019 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-07 07:58:37,019 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-07 07:58:37,019 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-07 07:58:37,019 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-07 07:58:37,020 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-07 07:58:37,020 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-07 07:58:37,020 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-07 07:58:37,020 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-07 07:58:37,021 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-07 07:58:37,021 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:58:37,021 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-07 07:58:37,021 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2021-11-07 07:58:37,022 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-07 07:58:37,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 07:58:37,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 07:58:37,022 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 07:58:37,022 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 07:58:37,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 07:58:37,023 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 07:58:37,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-07 07:58:37,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 07:58:37,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-07 07:58:37,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 07:58:37,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:58:37,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-11-07 07:58:37,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 07:58:37,913 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-07 07:58:50,552 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:58:50,552 INFO L299 CfgBuilder]: Removed 168 assume(true) statements. [2021-11-07 07:58:50,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:58:50 BoogieIcfgContainer [2021-11-07 07:58:50,572 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:58:50,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:58:50,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:58:50,586 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:58:50,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:58:34" (1/3) ... [2021-11-07 07:58:50,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26233641 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:58:50, skipping insertion in model container [2021-11-07 07:58:50,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:58:36" (2/3) ... [2021-11-07 07:58:50,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26233641 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:58:50, skipping insertion in model container [2021-11-07 07:58:50,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:58:50" (3/3) ... [2021-11-07 07:58:50,593 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test10-3.i [2021-11-07 07:58:50,600 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:58:50,601 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1193 error locations. [2021-11-07 07:58:50,656 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:58:50,665 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 07:58:50,665 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1193 error locations. [2021-11-07 07:58:50,748 INFO L276 IsEmpty]: Start isEmpty. Operand has 2442 states, 1233 states have (on average 2.227088402270884) internal successors, (2746), 2424 states have internal predecessors, (2746), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-07 07:58:50,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 07:58:50,756 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:58:50,757 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:58:50,758 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-07 07:58:50,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:58:50,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1848007294, now seen corresponding path program 1 times [2021-11-07 07:58:50,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:58:50,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85332593] [2021-11-07 07:58:50,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:58:50,781 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:58:50,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:58:50,783 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:58:50,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 07:58:51,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:58:51,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 07:58:51,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:58:51,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 07:58:51,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:51,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:58:51,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:51,403 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:58:51,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85332593] [2021-11-07 07:58:51,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [85332593] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:58:51,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:58:51,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 07:58:51,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659824853] [2021-11-07 07:58:51,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:58:51,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:58:51,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:58:51,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:58:51,438 INFO L87 Difference]: Start difference. First operand has 2442 states, 1233 states have (on average 2.227088402270884) internal successors, (2746), 2424 states have internal predecessors, (2746), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:58:57,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:58:57,645 INFO L93 Difference]: Finished difference Result 3286 states and 3488 transitions. [2021-11-07 07:58:57,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:58:57,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-11-07 07:58:57,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:58:57,697 INFO L225 Difference]: With dead ends: 3286 [2021-11-07 07:58:57,697 INFO L226 Difference]: Without dead ends: 3283 [2021-11-07 07:58:57,699 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:58:57,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2021-11-07 07:58:57,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 2583. [2021-11-07 07:58:57,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2583 states, 1399 states have (on average 2.0664760543245175) internal successors, (2891), 2564 states have internal predecessors, (2891), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-07 07:58:57,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2583 states to 2583 states and 2926 transitions. [2021-11-07 07:58:57,936 INFO L78 Accepts]: Start accepts. Automaton has 2583 states and 2926 transitions. Word has length 7 [2021-11-07 07:58:57,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:58:57,937 INFO L470 AbstractCegarLoop]: Abstraction has 2583 states and 2926 transitions. [2021-11-07 07:58:57,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:58:57,937 INFO L276 IsEmpty]: Start isEmpty. Operand 2583 states and 2926 transitions. [2021-11-07 07:58:57,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 07:58:57,938 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:58:57,938 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:58:57,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 07:58:58,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:58:58,152 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-07 07:58:58,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:58:58,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1848007293, now seen corresponding path program 1 times [2021-11-07 07:58:58,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:58:58,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489796329] [2021-11-07 07:58:58,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:58:58,155 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:58:58,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:58:58,156 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:58:58,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 07:58:58,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:58:58,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 07:58:58,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:58:58,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 07:58:58,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:58,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:58:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:58,674 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:58:58,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489796329] [2021-11-07 07:58:58,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [489796329] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:58:58,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:58:58,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 07:58:58,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080518285] [2021-11-07 07:58:58,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:58:58,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:58:58,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:58:58,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:58:58,682 INFO L87 Difference]: Start difference. First operand 2583 states and 2926 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:59:12,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:59:12,845 INFO L93 Difference]: Finished difference Result 4061 states and 4523 transitions. [2021-11-07 07:59:12,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:59:12,846 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-11-07 07:59:12,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:59:12,874 INFO L225 Difference]: With dead ends: 4061 [2021-11-07 07:59:12,874 INFO L226 Difference]: Without dead ends: 4061 [2021-11-07 07:59:12,875 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:59:12,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4061 states. [2021-11-07 07:59:12,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4061 to 2747. [2021-11-07 07:59:12,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2747 states, 1575 states have (on average 2.0526984126984127) internal successors, (3233), 2728 states have internal predecessors, (3233), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-07 07:59:13,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2747 states to 2747 states and 3268 transitions. [2021-11-07 07:59:13,016 INFO L78 Accepts]: Start accepts. Automaton has 2747 states and 3268 transitions. Word has length 7 [2021-11-07 07:59:13,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:59:13,016 INFO L470 AbstractCegarLoop]: Abstraction has 2747 states and 3268 transitions. [2021-11-07 07:59:13,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:59:13,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2747 states and 3268 transitions. [2021-11-07 07:59:13,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 07:59:13,017 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:59:13,018 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:59:13,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 07:59:13,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:59:13,219 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr6REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-07 07:59:13,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:59:13,220 INFO L85 PathProgramCache]: Analyzing trace with hash 515316259, now seen corresponding path program 1 times [2021-11-07 07:59:13,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:59:13,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1894880999] [2021-11-07 07:59:13,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:59:13,221 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:59:13,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:59:13,223 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:59:13,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 07:59:13,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:13,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 07:59:13,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:59:13,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 07:59:13,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:13,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:59:13,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:13,674 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:59:13,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1894880999] [2021-11-07 07:59:13,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1894880999] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:59:13,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:59:13,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 07:59:13,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286137962] [2021-11-07 07:59:13,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:59:13,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:59:13,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:59:13,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:59:13,679 INFO L87 Difference]: Start difference. First operand 2747 states and 3268 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:59:18,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:59:18,603 INFO L93 Difference]: Finished difference Result 3485 states and 4006 transitions. [2021-11-07 07:59:18,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:59:18,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-07 07:59:18,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:59:18,626 INFO L225 Difference]: With dead ends: 3485 [2021-11-07 07:59:18,626 INFO L226 Difference]: Without dead ends: 3485 [2021-11-07 07:59:18,627 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:59:18,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3485 states. [2021-11-07 07:59:18,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3485 to 2656. [2021-11-07 07:59:18,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2656 states, 1575 states have (on average 1.9733333333333334) internal successors, (3108), 2637 states have internal predecessors, (3108), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-07 07:59:18,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2656 states to 2656 states and 3143 transitions. [2021-11-07 07:59:18,712 INFO L78 Accepts]: Start accepts. Automaton has 2656 states and 3143 transitions. Word has length 12 [2021-11-07 07:59:18,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:59:18,712 INFO L470 AbstractCegarLoop]: Abstraction has 2656 states and 3143 transitions. [2021-11-07 07:59:18,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:59:18,713 INFO L276 IsEmpty]: Start isEmpty. Operand 2656 states and 3143 transitions. [2021-11-07 07:59:18,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 07:59:18,714 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:59:18,714 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:59:18,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 07:59:18,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:59:18,932 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr7REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-07 07:59:18,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:59:18,933 INFO L85 PathProgramCache]: Analyzing trace with hash 515316260, now seen corresponding path program 1 times [2021-11-07 07:59:18,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:59:18,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333265770] [2021-11-07 07:59:18,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:59:18,935 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:59:18,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:59:18,936 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:59:18,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 07:59:19,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:19,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 07:59:19,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:59:19,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 07:59:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:19,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:59:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:19,478 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:59:19,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [333265770] [2021-11-07 07:59:19,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [333265770] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:59:19,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:59:19,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 07:59:19,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130257768] [2021-11-07 07:59:19,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:59:19,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:59:19,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:59:19,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:59:19,481 INFO L87 Difference]: Start difference. First operand 2656 states and 3143 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:59:32,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:59:32,166 INFO L93 Difference]: Finished difference Result 3611 states and 4034 transitions. [2021-11-07 07:59:32,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:59:32,167 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-07 07:59:32,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:59:32,186 INFO L225 Difference]: With dead ends: 3611 [2021-11-07 07:59:32,187 INFO L226 Difference]: Without dead ends: 3611 [2021-11-07 07:59:32,187 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:59:32,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3611 states. [2021-11-07 07:59:32,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3611 to 2648. [2021-11-07 07:59:32,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 1577 states have (on average 1.9581483830057071) internal successors, (3088), 2629 states have internal predecessors, (3088), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-07 07:59:32,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 3123 transitions. [2021-11-07 07:59:32,259 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 3123 transitions. Word has length 12 [2021-11-07 07:59:32,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:59:32,260 INFO L470 AbstractCegarLoop]: Abstraction has 2648 states and 3123 transitions. [2021-11-07 07:59:32,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:59:32,260 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 3123 transitions. [2021-11-07 07:59:32,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 07:59:32,261 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:59:32,261 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:59:32,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 07:59:32,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:59:32,473 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr658REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-07 07:59:32,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:59:32,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1098922193, now seen corresponding path program 1 times [2021-11-07 07:59:32,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:59:32,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959619022] [2021-11-07 07:59:32,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:59:32,476 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:59:32,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:59:32,476 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:59:32,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 07:59:32,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:32,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 07:59:32,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:59:32,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:32,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:59:32,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:32,846 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:59:32,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959619022] [2021-11-07 07:59:32,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959619022] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:59:32,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:59:32,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 07:59:32,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689698954] [2021-11-07 07:59:32,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:59:32,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:59:32,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:59:32,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:59:32,849 INFO L87 Difference]: Start difference. First operand 2648 states and 3123 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:59:32,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:59:32,931 INFO L93 Difference]: Finished difference Result 2606 states and 3080 transitions. [2021-11-07 07:59:32,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:59:32,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-07 07:59:32,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:59:32,948 INFO L225 Difference]: With dead ends: 2606 [2021-11-07 07:59:32,949 INFO L226 Difference]: Without dead ends: 2606 [2021-11-07 07:59:32,949 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:59:32,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2021-11-07 07:59:33,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 2606. [2021-11-07 07:59:33,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2606 states, 1559 states have (on average 1.9531751122514431) internal successors, (3045), 2587 states have internal predecessors, (3045), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-07 07:59:33,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2606 states to 2606 states and 3080 transitions. [2021-11-07 07:59:33,030 INFO L78 Accepts]: Start accepts. Automaton has 2606 states and 3080 transitions. Word has length 15 [2021-11-07 07:59:33,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:59:33,036 INFO L470 AbstractCegarLoop]: Abstraction has 2606 states and 3080 transitions. [2021-11-07 07:59:33,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:59:33,037 INFO L276 IsEmpty]: Start isEmpty. Operand 2606 states and 3080 transitions. [2021-11-07 07:59:33,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 07:59:33,038 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:59:33,038 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:59:33,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 07:59:33,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:59:33,257 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr682REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-07 07:59:33,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:59:33,258 INFO L85 PathProgramCache]: Analyzing trace with hash -497671989, now seen corresponding path program 1 times [2021-11-07 07:59:33,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:59:33,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [868688168] [2021-11-07 07:59:33,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:59:33,259 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:59:33,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:59:33,262 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:59:33,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 07:59:33,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:33,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 07:59:33,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:59:33,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:33,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:59:33,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:33,721 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:59:33,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [868688168] [2021-11-07 07:59:33,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [868688168] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:59:33,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:59:33,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 07:59:33,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652613899] [2021-11-07 07:59:33,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:59:33,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:59:33,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:59:33,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:59:33,722 INFO L87 Difference]: Start difference. First operand 2606 states and 3080 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:59:33,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:59:33,838 INFO L93 Difference]: Finished difference Result 2585 states and 3052 transitions. [2021-11-07 07:59:33,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:59:33,839 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-07 07:59:33,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:59:33,856 INFO L225 Difference]: With dead ends: 2585 [2021-11-07 07:59:33,857 INFO L226 Difference]: Without dead ends: 2585 [2021-11-07 07:59:33,857 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:59:33,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2585 states. [2021-11-07 07:59:33,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2585 to 2584. [2021-11-07 07:59:33,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2584 states, 1551 states have (on average 1.9445519019987105) internal successors, (3016), 2565 states have internal predecessors, (3016), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-07 07:59:33,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2584 states to 2584 states and 3051 transitions. [2021-11-07 07:59:33,929 INFO L78 Accepts]: Start accepts. Automaton has 2584 states and 3051 transitions. Word has length 17 [2021-11-07 07:59:33,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:59:33,929 INFO L470 AbstractCegarLoop]: Abstraction has 2584 states and 3051 transitions. [2021-11-07 07:59:33,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:59:33,930 INFO L276 IsEmpty]: Start isEmpty. Operand 2584 states and 3051 transitions. [2021-11-07 07:59:33,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 07:59:33,932 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:59:33,932 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:59:33,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 07:59:34,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:59:34,146 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr334REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-07 07:59:34,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:59:34,147 INFO L85 PathProgramCache]: Analyzing trace with hash -2032047504, now seen corresponding path program 1 times [2021-11-07 07:59:34,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:59:34,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [203955151] [2021-11-07 07:59:34,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:59:34,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:59:34,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:59:34,150 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:59:34,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 07:59:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:34,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 07:59:34,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:59:34,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:34,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:59:34,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:34,575 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:59:34,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [203955151] [2021-11-07 07:59:34,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [203955151] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:59:34,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:59:34,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 07:59:34,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157628623] [2021-11-07 07:59:34,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:59:34,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:59:34,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:59:34,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:59:34,576 INFO L87 Difference]: Start difference. First operand 2584 states and 3051 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:59:34,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:59:34,674 INFO L93 Difference]: Finished difference Result 4195 states and 4766 transitions. [2021-11-07 07:59:34,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:59:34,675 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-11-07 07:59:34,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:59:34,702 INFO L225 Difference]: With dead ends: 4195 [2021-11-07 07:59:34,702 INFO L226 Difference]: Without dead ends: 4195 [2021-11-07 07:59:34,703 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:59:34,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4195 states. [2021-11-07 07:59:34,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4195 to 2506. [2021-11-07 07:59:34,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2506 states, 1497 states have (on average 1.9285237140948563) internal successors, (2887), 2487 states have internal predecessors, (2887), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-07 07:59:34,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2506 states to 2506 states and 2922 transitions. [2021-11-07 07:59:34,775 INFO L78 Accepts]: Start accepts. Automaton has 2506 states and 2922 transitions. Word has length 24 [2021-11-07 07:59:34,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:59:34,776 INFO L470 AbstractCegarLoop]: Abstraction has 2506 states and 2922 transitions. [2021-11-07 07:59:34,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:59:34,776 INFO L276 IsEmpty]: Start isEmpty. Operand 2506 states and 2922 transitions. [2021-11-07 07:59:34,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 07:59:34,777 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:59:34,777 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:59:34,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 07:59:34,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:59:34,991 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr16REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-07 07:59:34,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:59:34,992 INFO L85 PathProgramCache]: Analyzing trace with hash 2117616112, now seen corresponding path program 1 times [2021-11-07 07:59:34,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:59:34,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2088644776] [2021-11-07 07:59:34,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:59:34,998 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:59:34,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:59:34,999 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:59:35,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 07:59:35,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:35,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 07:59:35,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:59:35,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:35,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:59:35,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:35,589 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:59:35,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2088644776] [2021-11-07 07:59:35,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2088644776] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:59:35,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:59:35,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 07:59:35,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405905251] [2021-11-07 07:59:35,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:59:35,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:59:35,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:59:35,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:59:35,592 INFO L87 Difference]: Start difference. First operand 2506 states and 2922 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:59:35,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:59:35,663 INFO L93 Difference]: Finished difference Result 4118 states and 4689 transitions. [2021-11-07 07:59:35,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:59:35,664 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-11-07 07:59:35,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:59:35,680 INFO L225 Difference]: With dead ends: 4118 [2021-11-07 07:59:35,680 INFO L226 Difference]: Without dead ends: 4118 [2021-11-07 07:59:35,680 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:59:35,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4118 states. [2021-11-07 07:59:35,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4118 to 2464. [2021-11-07 07:59:35,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2464 states, 1479 states have (on average 1.922920892494929) internal successors, (2844), 2445 states have internal predecessors, (2844), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-07 07:59:35,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 2879 transitions. [2021-11-07 07:59:35,747 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 2879 transitions. Word has length 24 [2021-11-07 07:59:35,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:59:35,748 INFO L470 AbstractCegarLoop]: Abstraction has 2464 states and 2879 transitions. [2021-11-07 07:59:35,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:59:35,749 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 2879 transitions. [2021-11-07 07:59:35,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 07:59:35,750 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:59:35,750 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:59:35,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 07:59:35,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:59:35,965 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr358REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-07 07:59:35,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:59:35,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1412495274, now seen corresponding path program 1 times [2021-11-07 07:59:35,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:59:35,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [656715322] [2021-11-07 07:59:35,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:59:35,966 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:59:35,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:59:35,967 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:59:35,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 07:59:36,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:36,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 07:59:36,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:59:36,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:36,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:59:36,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:36,457 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:59:36,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [656715322] [2021-11-07 07:59:36,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [656715322] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:59:36,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:59:36,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 07:59:36,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973204408] [2021-11-07 07:59:36,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:59:36,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:59:36,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:59:36,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:59:36,459 INFO L87 Difference]: Start difference. First operand 2464 states and 2879 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:59:36,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:59:36,642 INFO L93 Difference]: Finished difference Result 4076 states and 4596 transitions. [2021-11-07 07:59:36,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:59:36,643 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-11-07 07:59:36,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:59:36,661 INFO L225 Difference]: With dead ends: 4076 [2021-11-07 07:59:36,662 INFO L226 Difference]: Without dead ends: 4076 [2021-11-07 07:59:36,662 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:59:36,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-11-07 07:59:36,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 2426. [2021-11-07 07:59:36,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2426 states, 1455 states have (on average 1.8948453608247422) internal successors, (2757), 2407 states have internal predecessors, (2757), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-07 07:59:36,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2426 states to 2426 states and 2792 transitions. [2021-11-07 07:59:36,734 INFO L78 Accepts]: Start accepts. Automaton has 2426 states and 2792 transitions. Word has length 26 [2021-11-07 07:59:36,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:59:36,735 INFO L470 AbstractCegarLoop]: Abstraction has 2426 states and 2792 transitions. [2021-11-07 07:59:36,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:59:36,735 INFO L276 IsEmpty]: Start isEmpty. Operand 2426 states and 2792 transitions. [2021-11-07 07:59:36,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 07:59:36,741 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:59:36,741 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:59:36,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 07:59:36,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:59:36,960 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr40REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-07 07:59:36,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:59:36,961 INFO L85 PathProgramCache]: Analyzing trace with hash -785415766, now seen corresponding path program 1 times [2021-11-07 07:59:36,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:59:36,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [155538485] [2021-11-07 07:59:36,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:59:36,962 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:59:36,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:59:36,975 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:59:37,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 07:59:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:37,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 07:59:37,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:59:37,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:37,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:59:37,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:37,553 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:59:37,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [155538485] [2021-11-07 07:59:37,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [155538485] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:59:37,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:59:37,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 07:59:37,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042496639] [2021-11-07 07:59:37,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:59:37,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:59:37,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:59:37,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:59:37,556 INFO L87 Difference]: Start difference. First operand 2426 states and 2792 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:59:37,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:59:37,709 INFO L93 Difference]: Finished difference Result 4037 states and 4545 transitions. [2021-11-07 07:59:37,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:59:37,710 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-11-07 07:59:37,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:59:37,721 INFO L225 Difference]: With dead ends: 4037 [2021-11-07 07:59:37,721 INFO L226 Difference]: Without dead ends: 4037 [2021-11-07 07:59:37,722 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:59:37,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4037 states. [2021-11-07 07:59:37,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4037 to 2404. [2021-11-07 07:59:37,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2404 states, 1447 states have (on average 1.8852798894263993) internal successors, (2728), 2385 states have internal predecessors, (2728), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-07 07:59:37,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2404 states to 2404 states and 2763 transitions. [2021-11-07 07:59:37,790 INFO L78 Accepts]: Start accepts. Automaton has 2404 states and 2763 transitions. Word has length 26 [2021-11-07 07:59:37,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:59:37,791 INFO L470 AbstractCegarLoop]: Abstraction has 2404 states and 2763 transitions. [2021-11-07 07:59:37,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:59:37,791 INFO L276 IsEmpty]: Start isEmpty. Operand 2404 states and 2763 transitions. [2021-11-07 07:59:37,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 07:59:37,793 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:59:37,793 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:59:37,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-07 07:59:38,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:59:38,008 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr696REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-07 07:59:38,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:59:38,009 INFO L85 PathProgramCache]: Analyzing trace with hash -253561191, now seen corresponding path program 1 times [2021-11-07 07:59:38,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:59:38,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [897025458] [2021-11-07 07:59:38,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:59:38,010 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:59:38,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:59:38,011 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:59:38,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 07:59:38,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:38,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 07:59:38,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:59:38,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 07:59:38,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:38,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:59:38,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:38,739 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:59:38,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [897025458] [2021-11-07 07:59:38,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [897025458] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:59:38,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:59:38,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 07:59:38,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606866088] [2021-11-07 07:59:38,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:59:38,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:59:38,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:59:38,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:59:38,741 INFO L87 Difference]: Start difference. First operand 2404 states and 2763 transitions. Second operand has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:59:44,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:59:44,640 INFO L93 Difference]: Finished difference Result 3025 states and 3303 transitions. [2021-11-07 07:59:44,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:59:44,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-11-07 07:59:44,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:59:44,647 INFO L225 Difference]: With dead ends: 3025 [2021-11-07 07:59:44,647 INFO L226 Difference]: Without dead ends: 3025 [2021-11-07 07:59:44,647 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:59:44,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3025 states. [2021-11-07 07:59:44,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3025 to 2400. [2021-11-07 07:59:44,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 1447 states have (on average 1.8825155494125778) internal successors, (2724), 2381 states have internal predecessors, (2724), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-07 07:59:44,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 2759 transitions. [2021-11-07 07:59:44,702 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 2759 transitions. Word has length 31 [2021-11-07 07:59:44,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:59:44,702 INFO L470 AbstractCegarLoop]: Abstraction has 2400 states and 2759 transitions. [2021-11-07 07:59:44,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:59:44,704 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 2759 transitions. [2021-11-07 07:59:44,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 07:59:44,705 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:59:44,705 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:59:44,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 07:59:44,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:59:44,920 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr697REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-07 07:59:44,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:59:44,921 INFO L85 PathProgramCache]: Analyzing trace with hash -253561190, now seen corresponding path program 1 times [2021-11-07 07:59:44,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:59:44,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2033817933] [2021-11-07 07:59:44,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:59:44,922 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:59:44,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:59:44,924 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:59:44,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 07:59:45,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:45,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 07:59:45,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:59:45,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 07:59:45,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:45,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:59:46,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:46,265 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:59:46,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2033817933] [2021-11-07 07:59:46,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2033817933] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:59:46,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:59:46,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 07:59:46,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880690238] [2021-11-07 07:59:46,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:59:46,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:59:46,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:59:46,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:59:46,267 INFO L87 Difference]: Start difference. First operand 2400 states and 2759 transitions. Second operand has 6 states, 5 states have (on average 10.8) internal successors, (54), 6 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:00:06,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:00:06,524 INFO L93 Difference]: Finished difference Result 3575 states and 3928 transitions. [2021-11-07 08:00:06,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:00:06,526 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.8) internal successors, (54), 6 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-11-07 08:00:06,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:00:06,534 INFO L225 Difference]: With dead ends: 3575 [2021-11-07 08:00:06,535 INFO L226 Difference]: Without dead ends: 3575 [2021-11-07 08:00:06,535 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:00:06,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3575 states. [2021-11-07 08:00:06,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3575 to 2433. [2021-11-07 08:00:06,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2433 states, 1481 states have (on average 1.8642808912896691) internal successors, (2761), 2414 states have internal predecessors, (2761), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-07 08:00:06,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 2796 transitions. [2021-11-07 08:00:06,585 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 2796 transitions. Word has length 31 [2021-11-07 08:00:06,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:00:06,585 INFO L470 AbstractCegarLoop]: Abstraction has 2433 states and 2796 transitions. [2021-11-07 08:00:06,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.8) internal successors, (54), 6 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:00:06,586 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 2796 transitions. [2021-11-07 08:00:06,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 08:00:06,587 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:00:06,588 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:00:06,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 08:00:06,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:00:06,803 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr372REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-07 08:00:06,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:00:06,803 INFO L85 PathProgramCache]: Analyzing trace with hash 926454328, now seen corresponding path program 1 times [2021-11-07 08:00:06,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:00:06,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1791786099] [2021-11-07 08:00:06,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:00:06,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:00:06,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:00:06,809 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:00:06,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 08:00:07,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:00:07,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:00:07,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:00:07,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:00:07,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:00:07,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:00:07,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:00:07,616 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:00:07,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1791786099] [2021-11-07 08:00:07,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1791786099] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:00:07,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:00:07,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 08:00:07,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699558298] [2021-11-07 08:00:07,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:00:07,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:00:07,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:00:07,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:00:07,618 INFO L87 Difference]: Start difference. First operand 2433 states and 2796 transitions. Second operand has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:00:16,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:00:16,576 INFO L93 Difference]: Finished difference Result 5058 states and 5640 transitions. [2021-11-07 08:00:16,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:00:16,577 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-11-07 08:00:16,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:00:16,591 INFO L225 Difference]: With dead ends: 5058 [2021-11-07 08:00:16,591 INFO L226 Difference]: Without dead ends: 5058 [2021-11-07 08:00:16,592 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:00:16,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5058 states. [2021-11-07 08:00:16,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5058 to 2430. [2021-11-07 08:00:16,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2430 states, 1481 states have (on average 1.8568534773801486) internal successors, (2750), 2411 states have internal predecessors, (2750), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-07 08:00:16,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2430 states to 2430 states and 2785 transitions. [2021-11-07 08:00:16,654 INFO L78 Accepts]: Start accepts. Automaton has 2430 states and 2785 transitions. Word has length 40 [2021-11-07 08:00:16,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:00:16,655 INFO L470 AbstractCegarLoop]: Abstraction has 2430 states and 2785 transitions. [2021-11-07 08:00:16,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:00:16,655 INFO L276 IsEmpty]: Start isEmpty. Operand 2430 states and 2785 transitions. [2021-11-07 08:00:16,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 08:00:16,656 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:00:16,656 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:00:16,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 08:00:16,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:00:16,887 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr373REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-07 08:00:16,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:00:16,888 INFO L85 PathProgramCache]: Analyzing trace with hash 926454329, now seen corresponding path program 1 times [2021-11-07 08:00:16,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:00:16,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [738244072] [2021-11-07 08:00:16,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:00:16,889 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:00:16,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:00:16,890 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:00:16,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 08:00:17,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:00:17,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 08:00:17,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:00:17,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:00:17,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:00:17,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:00:18,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:00:18,556 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:00:18,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [738244072] [2021-11-07 08:00:18,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [738244072] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:00:18,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:00:18,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 08:00:18,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854446668] [2021-11-07 08:00:18,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:00:18,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:00:18,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:00:18,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:00:18,559 INFO L87 Difference]: Start difference. First operand 2430 states and 2785 transitions. Second operand has 6 states, 5 states have (on average 13.8) internal successors, (69), 6 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:00:41,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:00:41,653 INFO L93 Difference]: Finished difference Result 5190 states and 5720 transitions. [2021-11-07 08:00:41,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:00:41,654 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.8) internal successors, (69), 6 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-11-07 08:00:41,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:00:41,665 INFO L225 Difference]: With dead ends: 5190 [2021-11-07 08:00:41,666 INFO L226 Difference]: Without dead ends: 5190 [2021-11-07 08:00:41,666 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:00:41,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5190 states. [2021-11-07 08:00:41,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5190 to 2430. [2021-11-07 08:00:41,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2430 states, 1481 states have (on average 1.8541525995948682) internal successors, (2746), 2411 states have internal predecessors, (2746), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-07 08:00:41,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2430 states to 2430 states and 2781 transitions. [2021-11-07 08:00:41,748 INFO L78 Accepts]: Start accepts. Automaton has 2430 states and 2781 transitions. Word has length 40 [2021-11-07 08:00:41,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:00:41,749 INFO L470 AbstractCegarLoop]: Abstraction has 2430 states and 2781 transitions. [2021-11-07 08:00:41,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.8) internal successors, (69), 6 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:00:41,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2430 states and 2781 transitions. [2021-11-07 08:00:41,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 08:00:41,751 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:00:41,751 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:00:41,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 08:00:41,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:00:41,975 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr54REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-07 08:00:41,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:00:41,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1060930120, now seen corresponding path program 1 times [2021-11-07 08:00:41,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:00:41,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [526439369] [2021-11-07 08:00:41,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:00:41,980 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:00:41,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:00:41,981 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:00:42,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 08:00:42,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:00:42,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:00:42,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:00:42,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:00:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:00:42,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:00:42,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:00:42,853 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:00:42,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [526439369] [2021-11-07 08:00:42,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [526439369] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:00:42,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:00:42,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 08:00:42,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571294383] [2021-11-07 08:00:42,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:00:42,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:00:42,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:00:42,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:00:42,856 INFO L87 Difference]: Start difference. First operand 2430 states and 2781 transitions. Second operand has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:00:50,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:00:50,812 INFO L93 Difference]: Finished difference Result 4671 states and 5229 transitions. [2021-11-07 08:00:50,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:00:50,812 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-11-07 08:00:50,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:00:50,823 INFO L225 Difference]: With dead ends: 4671 [2021-11-07 08:00:50,823 INFO L226 Difference]: Without dead ends: 4671 [2021-11-07 08:00:50,824 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:00:50,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4671 states. [2021-11-07 08:00:50,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4671 to 2426. [2021-11-07 08:00:50,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2426 states, 1481 states have (on average 1.851451721809588) internal successors, (2742), 2407 states have internal predecessors, (2742), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-07 08:00:50,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2426 states to 2426 states and 2777 transitions. [2021-11-07 08:00:50,872 INFO L78 Accepts]: Start accepts. Automaton has 2426 states and 2777 transitions. Word has length 40 [2021-11-07 08:00:50,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:00:50,872 INFO L470 AbstractCegarLoop]: Abstraction has 2426 states and 2777 transitions. [2021-11-07 08:00:50,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:00:50,873 INFO L276 IsEmpty]: Start isEmpty. Operand 2426 states and 2777 transitions. [2021-11-07 08:00:50,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 08:00:50,874 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:00:50,874 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:00:50,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 08:00:51,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:00:51,090 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr55REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-07 08:00:51,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:00:51,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1060930119, now seen corresponding path program 1 times [2021-11-07 08:00:51,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:00:51,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [136657883] [2021-11-07 08:00:51,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:00:51,093 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:00:51,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:00:51,094 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:00:51,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 08:00:51,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:00:51,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 08:00:51,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:00:51,761 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 [2021-11-07 08:00:52,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:00:52,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:00:52,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:00:52,673 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:00:52,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [136657883] [2021-11-07 08:00:52,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [136657883] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:00:52,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:00:52,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 08:00:52,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488787254] [2021-11-07 08:00:52,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:00:52,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:00:52,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:00:52,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:00:52,676 INFO L87 Difference]: Start difference. First operand 2426 states and 2777 transitions. Second operand has 6 states, 5 states have (on average 13.8) internal successors, (69), 6 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:01:16,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:01:16,861 INFO L93 Difference]: Finished difference Result 4579 states and 5017 transitions. [2021-11-07 08:01:16,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:01:16,863 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.8) internal successors, (69), 6 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-11-07 08:01:16,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:01:16,870 INFO L225 Difference]: With dead ends: 4579 [2021-11-07 08:01:16,870 INFO L226 Difference]: Without dead ends: 4579 [2021-11-07 08:01:16,871 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:01:16,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4579 states. [2021-11-07 08:01:16,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4579 to 2422. [2021-11-07 08:01:16,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2422 states, 1481 states have (on average 1.848750844024308) internal successors, (2738), 2403 states have internal predecessors, (2738), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-07 08:01:16,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2422 states to 2422 states and 2773 transitions. [2021-11-07 08:01:16,921 INFO L78 Accepts]: Start accepts. Automaton has 2422 states and 2773 transitions. Word has length 40 [2021-11-07 08:01:16,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:01:16,922 INFO L470 AbstractCegarLoop]: Abstraction has 2422 states and 2773 transitions. [2021-11-07 08:01:16,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.8) internal successors, (69), 6 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:01:16,922 INFO L276 IsEmpty]: Start isEmpty. Operand 2422 states and 2773 transitions. [2021-11-07 08:01:16,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 08:01:16,923 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:01:16,923 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:01:16,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 08:01:17,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:01:17,138 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr704REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-07 08:01:17,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:01:17,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1617899872, now seen corresponding path program 1 times [2021-11-07 08:01:17,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:01:17,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [486678110] [2021-11-07 08:01:17,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:01:17,140 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:01:17,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:01:17,141 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:01:17,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 08:01:17,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:01:17,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:01:17,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:01:17,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:01:17,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:01:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:01:17,980 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:01:17,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [486678110] [2021-11-07 08:01:17,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [486678110] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:01:17,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:01:17,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 08:01:17,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564192873] [2021-11-07 08:01:17,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:01:17,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:01:17,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:01:17,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:01:17,982 INFO L87 Difference]: Start difference. First operand 2422 states and 2773 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:01:18,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:01:18,049 INFO L93 Difference]: Finished difference Result 2416 states and 2759 transitions. [2021-11-07 08:01:18,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:01:18,050 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-11-07 08:01:18,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:01:18,054 INFO L225 Difference]: With dead ends: 2416 [2021-11-07 08:01:18,054 INFO L226 Difference]: Without dead ends: 2416 [2021-11-07 08:01:18,055 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:01:18,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-11-07 08:01:18,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2416. [2021-11-07 08:01:18,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2416 states, 1475 states have (on average 1.8467796610169491) internal successors, (2724), 2397 states have internal predecessors, (2724), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-07 08:01:18,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 2759 transitions. [2021-11-07 08:01:18,093 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 2759 transitions. Word has length 44 [2021-11-07 08:01:18,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:01:18,093 INFO L470 AbstractCegarLoop]: Abstraction has 2416 states and 2759 transitions. [2021-11-07 08:01:18,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:01:18,094 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 2759 transitions. [2021-11-07 08:01:18,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 08:01:18,095 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:01:18,095 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:01:18,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 08:01:18,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:01:18,309 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr704REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-07 08:01:18,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:01:18,310 INFO L85 PathProgramCache]: Analyzing trace with hash -357192108, now seen corresponding path program 1 times [2021-11-07 08:01:18,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:01:18,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1812893742] [2021-11-07 08:01:18,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:01:18,311 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:01:18,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:01:18,312 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:01:18,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 08:01:18,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:01:18,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:01:18,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:01:19,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:01:19,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:01:19,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:01:19,799 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:01:19,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1812893742] [2021-11-07 08:01:19,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1812893742] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:01:19,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:01:19,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 08:01:19,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480543040] [2021-11-07 08:01:19,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:01:19,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:01:19,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:01:19,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:01:19,802 INFO L87 Difference]: Start difference. First operand 2416 states and 2759 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:01:20,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:01:20,163 INFO L93 Difference]: Finished difference Result 3934 states and 4411 transitions. [2021-11-07 08:01:20,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:01:20,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-11-07 08:01:20,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:01:20,169 INFO L225 Difference]: With dead ends: 3934 [2021-11-07 08:01:20,169 INFO L226 Difference]: Without dead ends: 3934 [2021-11-07 08:01:20,170 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:01:20,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3934 states. [2021-11-07 08:01:20,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3934 to 3135. [2021-11-07 08:01:20,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3135 states, 2190 states have (on average 1.8136986301369864) internal successors, (3972), 3109 states have internal predecessors, (3972), 25 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-07 08:01:20,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3135 states to 3135 states and 4021 transitions. [2021-11-07 08:01:20,238 INFO L78 Accepts]: Start accepts. Automaton has 3135 states and 4021 transitions. Word has length 52 [2021-11-07 08:01:20,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:01:20,239 INFO L470 AbstractCegarLoop]: Abstraction has 3135 states and 4021 transitions. [2021-11-07 08:01:20,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:01:20,239 INFO L276 IsEmpty]: Start isEmpty. Operand 3135 states and 4021 transitions. [2021-11-07 08:01:20,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 08:01:20,240 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:01:20,240 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:01:20,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 08:01:20,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:01:20,456 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr437REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-07 08:01:20,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:01:20,457 INFO L85 PathProgramCache]: Analyzing trace with hash -964579511, now seen corresponding path program 1 times [2021-11-07 08:01:20,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:01:20,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706761697] [2021-11-07 08:01:20,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:01:20,458 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:01:20,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:01:20,459 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:01:20,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 08:01:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:01:21,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:01:21,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:01:21,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:01:21,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:01:21,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:01:21,667 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:01:21,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706761697] [2021-11-07 08:01:21,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706761697] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:01:21,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:01:21,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 08:01:21,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421184012] [2021-11-07 08:01:21,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:01:21,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:01:21,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:01:21,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:01:21,670 INFO L87 Difference]: Start difference. First operand 3135 states and 4021 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:01:21,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:01:21,776 INFO L93 Difference]: Finished difference Result 4463 states and 5423 transitions. [2021-11-07 08:01:21,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:01:21,777 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-11-07 08:01:21,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:01:21,784 INFO L225 Difference]: With dead ends: 4463 [2021-11-07 08:01:21,784 INFO L226 Difference]: Without dead ends: 4463 [2021-11-07 08:01:21,784 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:01:21,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4463 states. [2021-11-07 08:01:21,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4463 to 3111. [2021-11-07 08:01:21,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3111 states, 2166 states have (on average 1.8153277931671283) internal successors, (3932), 3085 states have internal predecessors, (3932), 25 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-07 08:01:21,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3111 states to 3111 states and 3981 transitions. [2021-11-07 08:01:21,843 INFO L78 Accepts]: Start accepts. Automaton has 3111 states and 3981 transitions. Word has length 55 [2021-11-07 08:01:21,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:01:21,843 INFO L470 AbstractCegarLoop]: Abstraction has 3111 states and 3981 transitions. [2021-11-07 08:01:21,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:01:21,844 INFO L276 IsEmpty]: Start isEmpty. Operand 3111 states and 3981 transitions. [2021-11-07 08:01:21,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 08:01:21,845 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:01:21,845 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:01:21,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 08:01:22,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:01:22,062 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr73REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-07 08:01:22,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:01:22,063 INFO L85 PathProgramCache]: Analyzing trace with hash -158828041, now seen corresponding path program 1 times [2021-11-07 08:01:22,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:01:22,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [332602093] [2021-11-07 08:01:22,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:01:22,064 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:01:22,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:01:22,065 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:01:22,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 08:01:22,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:01:22,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:01:22,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:01:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:01:23,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:01:23,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:01:23,420 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:01:23,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [332602093] [2021-11-07 08:01:23,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [332602093] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:01:23,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:01:23,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 08:01:23,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368523006] [2021-11-07 08:01:23,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:01:23,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:01:23,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:01:23,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:01:23,422 INFO L87 Difference]: Start difference. First operand 3111 states and 3981 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:01:23,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:01:23,510 INFO L93 Difference]: Finished difference Result 4208 states and 4921 transitions. [2021-11-07 08:01:23,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:01:23,511 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-11-07 08:01:23,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:01:23,537 INFO L225 Difference]: With dead ends: 4208 [2021-11-07 08:01:23,538 INFO L226 Difference]: Without dead ends: 4208 [2021-11-07 08:01:23,538 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:01:23,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4208 states. [2021-11-07 08:01:23,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4208 to 3099. [2021-11-07 08:01:23,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3099 states, 2154 states have (on average 1.8161559888579386) internal successors, (3912), 3073 states have internal predecessors, (3912), 25 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-07 08:01:23,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3099 states to 3099 states and 3961 transitions. [2021-11-07 08:01:23,594 INFO L78 Accepts]: Start accepts. Automaton has 3099 states and 3961 transitions. Word has length 58 [2021-11-07 08:01:23,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:01:23,595 INFO L470 AbstractCegarLoop]: Abstraction has 3099 states and 3961 transitions. [2021-11-07 08:01:23,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:01:23,595 INFO L276 IsEmpty]: Start isEmpty. Operand 3099 states and 3961 transitions. [2021-11-07 08:01:23,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 08:01:23,596 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:01:23,596 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:01:23,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 08:01:23,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:01:23,817 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-07 08:01:23,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:01:23,817 INFO L85 PathProgramCache]: Analyzing trace with hash 468734877, now seen corresponding path program 1 times [2021-11-07 08:01:23,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:01:23,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1102922323] [2021-11-07 08:01:23,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:01:23,818 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:01:23,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:01:23,820 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:01:23,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 08:01:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:01:24,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:01:24,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:01:24,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:01:24,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:01:24,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:01:24,610 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-07 08:01:24,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-07 08:01:24,689 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-07 08:01:24,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-07 08:01:24,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:01:24,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:01:25,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:01:25,078 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:01:25,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1102922323] [2021-11-07 08:01:25,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1102922323] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:01:25,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:01:25,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 08:01:25,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330848547] [2021-11-07 08:01:25,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:01:25,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:01:25,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:01:25,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:01:25,080 INFO L87 Difference]: Start difference. First operand 3099 states and 3961 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:01:28,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:01:28,604 INFO L93 Difference]: Finished difference Result 3327 states and 4200 transitions. [2021-11-07 08:01:28,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:01:28,605 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2021-11-07 08:01:28,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:01:28,609 INFO L225 Difference]: With dead ends: 3327 [2021-11-07 08:01:28,609 INFO L226 Difference]: Without dead ends: 3327 [2021-11-07 08:01:28,609 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:01:28,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3327 states. [2021-11-07 08:01:28,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3327 to 3065. [2021-11-07 08:01:28,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3065 states, 2120 states have (on average 1.8287735849056603) internal successors, (3877), 3039 states have internal predecessors, (3877), 25 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-07 08:01:28,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3065 states to 3065 states and 3926 transitions. [2021-11-07 08:01:28,651 INFO L78 Accepts]: Start accepts. Automaton has 3065 states and 3926 transitions. Word has length 61 [2021-11-07 08:01:28,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:01:28,652 INFO L470 AbstractCegarLoop]: Abstraction has 3065 states and 3926 transitions. [2021-11-07 08:01:28,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:01:28,652 INFO L276 IsEmpty]: Start isEmpty. Operand 3065 states and 3926 transitions. [2021-11-07 08:01:28,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 08:01:28,653 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:01:28,653 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:01:28,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-07 08:01:28,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:01:28,868 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr437REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-07 08:01:28,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:01:28,869 INFO L85 PathProgramCache]: Analyzing trace with hash 73014525, now seen corresponding path program 1 times [2021-11-07 08:01:28,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:01:28,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [594203136] [2021-11-07 08:01:28,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:01:28,870 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:01:28,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:01:28,871 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:01:28,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 08:01:29,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:01:29,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:01:29,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:01:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:01:30,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:01:30,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:01:30,662 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:01:30,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [594203136] [2021-11-07 08:01:30,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [594203136] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:01:30,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:01:30,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 08:01:30,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694643823] [2021-11-07 08:01:30,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:01:30,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:01:30,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:01:30,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:01:30,664 INFO L87 Difference]: Start difference. First operand 3065 states and 3926 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:01:30,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:01:30,834 INFO L93 Difference]: Finished difference Result 4507 states and 5561 transitions. [2021-11-07 08:01:30,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:01:30,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2021-11-07 08:01:30,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:01:30,840 INFO L225 Difference]: With dead ends: 4507 [2021-11-07 08:01:30,840 INFO L226 Difference]: Without dead ends: 4507 [2021-11-07 08:01:30,840 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:01:30,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4507 states. [2021-11-07 08:01:30,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4507 to 3788. [2021-11-07 08:01:30,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3788 states, 2839 states have (on average 1.792180345191969) internal successors, (5088), 3755 states have internal predecessors, (5088), 32 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-07 08:01:30,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 5151 transitions. [2021-11-07 08:01:30,920 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 5151 transitions. Word has length 63 [2021-11-07 08:01:30,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:01:30,921 INFO L470 AbstractCegarLoop]: Abstraction has 3788 states and 5151 transitions. [2021-11-07 08:01:30,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:01:30,921 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 5151 transitions. [2021-11-07 08:01:30,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 08:01:30,928 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:01:30,928 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:01:30,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 08:01:31,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:01:31,147 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr391REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-07 08:01:31,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:01:31,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1815743939, now seen corresponding path program 1 times [2021-11-07 08:01:31,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:01:31,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255817468] [2021-11-07 08:01:31,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:01:31,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:01:31,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:01:31,150 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:01:31,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 08:01:31,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:01:31,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 08:01:31,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:01:31,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:01:31,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:01:32,830 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 08:01:32,830 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 25 treesize of output 27 [2021-11-07 08:01:32,836 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 08:01:32,837 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 20 [2021-11-07 08:01:32,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:01:32,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:01:37,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:01:37,924 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:01:37,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255817468] [2021-11-07 08:01:37,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255817468] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:01:37,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:01:37,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 08:01:37,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836747130] [2021-11-07 08:01:37,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:01:37,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:01:37,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:01:37,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-07 08:01:37,927 INFO L87 Difference]: Start difference. First operand 3788 states and 5151 transitions. Second operand has 6 states, 5 states have (on average 24.2) internal successors, (121), 6 states have internal predecessors, (121), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:02:08,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:08,382 INFO L93 Difference]: Finished difference Result 6730 states and 9145 transitions. [2021-11-07 08:02:08,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:02:08,383 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.2) internal successors, (121), 6 states have internal predecessors, (121), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-11-07 08:02:08,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:08,390 INFO L225 Difference]: With dead ends: 6730 [2021-11-07 08:02:08,390 INFO L226 Difference]: Without dead ends: 6730 [2021-11-07 08:02:08,390 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=26, Invalid=28, Unknown=2, NotChecked=0, Total=56 [2021-11-07 08:02:08,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6730 states. [2021-11-07 08:02:08,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6730 to 3732. [2021-11-07 08:02:08,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3732 states, 2847 states have (on average 1.7379697927643134) internal successors, (4948), 3699 states have internal predecessors, (4948), 32 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-07 08:02:08,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3732 states to 3732 states and 5011 transitions. [2021-11-07 08:02:08,473 INFO L78 Accepts]: Start accepts. Automaton has 3732 states and 5011 transitions. Word has length 66 [2021-11-07 08:02:08,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:08,474 INFO L470 AbstractCegarLoop]: Abstraction has 3732 states and 5011 transitions. [2021-11-07 08:02:08,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 24.2) internal successors, (121), 6 states have internal predecessors, (121), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:02:08,474 INFO L276 IsEmpty]: Start isEmpty. Operand 3732 states and 5011 transitions. [2021-11-07 08:02:08,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 08:02:08,475 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:08,475 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:08,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 08:02:08,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:02:08,689 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr396REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-07 08:02:08,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:08,690 INFO L85 PathProgramCache]: Analyzing trace with hash -407756336, now seen corresponding path program 1 times [2021-11-07 08:02:08,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:02:08,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [743755203] [2021-11-07 08:02:08,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:08,691 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:02:08,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:02:08,692 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:02:08,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 08:02:09,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:09,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:02:09,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:02:09,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:02:09,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-07 08:02:09,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-07 08:02:09,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:09,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:02:10,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:10,131 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:02:10,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [743755203] [2021-11-07 08:02:10,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [743755203] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:02:10,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:02:10,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 08:02:10,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183998845] [2021-11-07 08:02:10,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:02:10,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:02:10,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:02:10,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:02:10,133 INFO L87 Difference]: Start difference. First operand 3732 states and 5011 transitions. Second operand has 5 states, 4 states have (on average 17.0) internal successors, (68), 5 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:02:17,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:17,638 INFO L93 Difference]: Finished difference Result 3731 states and 5008 transitions. [2021-11-07 08:02:17,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:02:17,639 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 17.0) internal successors, (68), 5 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2021-11-07 08:02:17,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:17,644 INFO L225 Difference]: With dead ends: 3731 [2021-11-07 08:02:17,645 INFO L226 Difference]: Without dead ends: 3731 [2021-11-07 08:02:17,645 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:02:17,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3731 states. [2021-11-07 08:02:17,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3731 to 3731. [2021-11-07 08:02:17,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3731 states, 2847 states have (on average 1.7369160519845452) internal successors, (4945), 3698 states have internal predecessors, (4945), 32 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-07 08:02:17,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3731 states to 3731 states and 5008 transitions. [2021-11-07 08:02:17,699 INFO L78 Accepts]: Start accepts. Automaton has 3731 states and 5008 transitions. Word has length 71 [2021-11-07 08:02:17,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:17,699 INFO L470 AbstractCegarLoop]: Abstraction has 3731 states and 5008 transitions. [2021-11-07 08:02:17,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 17.0) internal successors, (68), 5 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:02:17,700 INFO L276 IsEmpty]: Start isEmpty. Operand 3731 states and 5008 transitions. [2021-11-07 08:02:17,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 08:02:17,701 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:17,701 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:17,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 08:02:17,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:02:17,917 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr397REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-07 08:02:17,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:17,917 INFO L85 PathProgramCache]: Analyzing trace with hash -407756335, now seen corresponding path program 1 times [2021-11-07 08:02:17,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:02:17,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [536403844] [2021-11-07 08:02:17,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:17,919 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:02:17,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:02:17,920 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:02:17,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 08:02:18,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:18,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 08:02:18,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:02:19,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:02:19,100 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 [2021-11-07 08:02:19,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:02:19,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-07 08:02:19,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-07 08:02:19,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:19,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:02:19,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:19,631 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:02:19,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [536403844] [2021-11-07 08:02:19,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [536403844] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:02:19,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:02:19,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 08:02:19,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125966836] [2021-11-07 08:02:19,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:02:19,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:02:19,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:02:19,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:02:19,634 INFO L87 Difference]: Start difference. First operand 3731 states and 5008 transitions. Second operand has 8 states, 7 states have (on average 10.714285714285714) internal successors, (75), 8 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:02:41,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:41,287 INFO L93 Difference]: Finished difference Result 3730 states and 5005 transitions. [2021-11-07 08:02:41,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:02:41,289 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.714285714285714) internal successors, (75), 8 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2021-11-07 08:02:41,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:41,294 INFO L225 Difference]: With dead ends: 3730 [2021-11-07 08:02:41,295 INFO L226 Difference]: Without dead ends: 3730 [2021-11-07 08:02:41,295 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:02:41,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3730 states. [2021-11-07 08:02:41,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3730 to 3730. [2021-11-07 08:02:41,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3730 states, 2844 states have (on average 1.7376933895921238) internal successors, (4942), 3697 states have internal predecessors, (4942), 32 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-07 08:02:41,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3730 states to 3730 states and 5005 transitions. [2021-11-07 08:02:41,337 INFO L78 Accepts]: Start accepts. Automaton has 3730 states and 5005 transitions. Word has length 71 [2021-11-07 08:02:41,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:41,338 INFO L470 AbstractCegarLoop]: Abstraction has 3730 states and 5005 transitions. [2021-11-07 08:02:41,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.714285714285714) internal successors, (75), 8 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:02:41,338 INFO L276 IsEmpty]: Start isEmpty. Operand 3730 states and 5005 transitions. [2021-11-07 08:02:41,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 08:02:41,339 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:41,339 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:41,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-07 08:02:41,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:02:41,555 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr78REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-07 08:02:41,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:41,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1405255012, now seen corresponding path program 1 times [2021-11-07 08:02:41,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:02:41,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811602612] [2021-11-07 08:02:41,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:41,557 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:02:41,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:02:41,558 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:02:41,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 08:02:42,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:42,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:02:42,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:02:42,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:02:42,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-07 08:02:42,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-07 08:02:42,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:42,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:02:42,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:42,755 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:02:42,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811602612] [2021-11-07 08:02:42,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811602612] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:02:42,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:02:42,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 08:02:42,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122571900] [2021-11-07 08:02:42,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:02:42,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:02:42,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:02:42,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:02:42,757 INFO L87 Difference]: Start difference. First operand 3730 states and 5005 transitions. Second operand has 5 states, 4 states have (on average 17.0) internal successors, (68), 5 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:02:50,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:50,406 INFO L93 Difference]: Finished difference Result 3729 states and 5003 transitions. [2021-11-07 08:02:50,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:02:50,407 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 17.0) internal successors, (68), 5 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2021-11-07 08:02:50,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:50,411 INFO L225 Difference]: With dead ends: 3729 [2021-11-07 08:02:50,411 INFO L226 Difference]: Without dead ends: 3729 [2021-11-07 08:02:50,411 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:02:50,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3729 states. [2021-11-07 08:02:50,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3729 to 3729. [2021-11-07 08:02:50,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3729 states, 2844 states have (on average 1.7369901547116737) internal successors, (4940), 3696 states have internal predecessors, (4940), 32 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-07 08:02:50,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3729 states to 3729 states and 5003 transitions. [2021-11-07 08:02:50,458 INFO L78 Accepts]: Start accepts. Automaton has 3729 states and 5003 transitions. Word has length 71 [2021-11-07 08:02:50,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:50,458 INFO L470 AbstractCegarLoop]: Abstraction has 3729 states and 5003 transitions. [2021-11-07 08:02:50,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 17.0) internal successors, (68), 5 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:02:50,458 INFO L276 IsEmpty]: Start isEmpty. Operand 3729 states and 5003 transitions. [2021-11-07 08:02:50,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 08:02:50,459 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:50,460 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:50,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-07 08:02:50,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:02:50,675 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr79REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-07 08:02:50,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:50,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1405255013, now seen corresponding path program 1 times [2021-11-07 08:02:50,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:02:50,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089600574] [2021-11-07 08:02:50,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:50,677 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:02:50,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:02:50,677 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:02:50,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 08:02:51,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:51,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 08:02:51,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:02:51,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:02:51,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 08:02:51,759 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 [2021-11-07 08:02:51,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-07 08:02:51,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-07 08:02:51,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:51,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:02:52,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:52,233 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:02:52,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089600574] [2021-11-07 08:02:52,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089600574] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:02:52,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:02:52,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 08:02:52,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298938172] [2021-11-07 08:02:52,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:02:52,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:02:52,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:02:52,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:02:52,234 INFO L87 Difference]: Start difference. First operand 3729 states and 5003 transitions. Second operand has 8 states, 7 states have (on average 10.714285714285714) internal successors, (75), 8 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:03:14,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:14,239 INFO L93 Difference]: Finished difference Result 3728 states and 5001 transitions. [2021-11-07 08:03:14,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:03:14,241 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.714285714285714) internal successors, (75), 8 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2021-11-07 08:03:14,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:14,244 INFO L225 Difference]: With dead ends: 3728 [2021-11-07 08:03:14,244 INFO L226 Difference]: Without dead ends: 3728 [2021-11-07 08:03:14,245 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:03:14,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3728 states. [2021-11-07 08:03:14,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3728 to 3728. [2021-11-07 08:03:14,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3728 states, 2842 states have (on average 1.737508796622097) internal successors, (4938), 3695 states have internal predecessors, (4938), 32 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-07 08:03:14,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 5001 transitions. [2021-11-07 08:03:14,283 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 5001 transitions. Word has length 71 [2021-11-07 08:03:14,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:14,284 INFO L470 AbstractCegarLoop]: Abstraction has 3728 states and 5001 transitions. [2021-11-07 08:03:14,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.714285714285714) internal successors, (75), 8 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 08:03:14,284 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 5001 transitions. [2021-11-07 08:03:14,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 08:03:14,285 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:14,285 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:14,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-07 08:03:14,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:03:14,489 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr400REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-07 08:03:14,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:14,489 INFO L85 PathProgramCache]: Analyzing trace with hash 491384311, now seen corresponding path program 1 times [2021-11-07 08:03:14,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:03:14,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [96985826] [2021-11-07 08:03:14,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:14,490 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:03:14,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:03:14,491 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:03:14,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 08:03:15,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:15,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:03:15,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:15,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:15,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:03:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:15,748 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:03:15,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [96985826] [2021-11-07 08:03:15,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [96985826] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 08:03:15,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:03:15,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 08:03:15,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419135972] [2021-11-07 08:03:15,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:03:15,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:03:15,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:03:15,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:03:15,749 INFO L87 Difference]: Start difference. First operand 3728 states and 5001 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 08:03:15,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:15,887 INFO L93 Difference]: Finished difference Result 3738 states and 5017 transitions. [2021-11-07 08:03:15,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:03:15,888 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 79 [2021-11-07 08:03:15,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:15,897 INFO L225 Difference]: With dead ends: 3738 [2021-11-07 08:03:15,897 INFO L226 Difference]: Without dead ends: 3738 [2021-11-07 08:03:15,897 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:03:15,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3738 states. [2021-11-07 08:03:15,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3738 to 3738. [2021-11-07 08:03:15,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3738 states, 2850 states have (on average 1.736842105263158) internal successors, (4950), 3704 states have internal predecessors, (4950), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (35), 28 states have call predecessors, (35), 31 states have call successors, (35) [2021-11-07 08:03:15,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 5017 transitions. [2021-11-07 08:03:15,951 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 5017 transitions. Word has length 79 [2021-11-07 08:03:15,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:15,951 INFO L470 AbstractCegarLoop]: Abstraction has 3738 states and 5017 transitions. [2021-11-07 08:03:15,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 08:03:15,952 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 5017 transitions. [2021-11-07 08:03:15,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 08:03:15,953 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:15,953 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:15,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-07 08:03:16,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:03:16,169 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr400REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-07 08:03:16,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:16,170 INFO L85 PathProgramCache]: Analyzing trace with hash -787144713, now seen corresponding path program 1 times [2021-11-07 08:03:16,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:03:16,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1024865007] [2021-11-07 08:03:16,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:16,170 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:03:16,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:03:16,171 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:03:16,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-07 08:03:17,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:17,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 08:03:17,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:17,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:17,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 08:03:17,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:17,571 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:03:17,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1024865007] [2021-11-07 08:03:17,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1024865007] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 08:03:17,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:17,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-07 08:03:17,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881760519] [2021-11-07 08:03:17,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:03:17,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 08:03:17,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:03:17,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:03:17,573 INFO L87 Difference]: Start difference. First operand 3738 states and 5017 transitions. Second operand has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 08:03:18,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:18,071 INFO L93 Difference]: Finished difference Result 3752 states and 5041 transitions. [2021-11-07 08:03:18,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 08:03:18,072 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 81 [2021-11-07 08:03:18,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:18,082 INFO L225 Difference]: With dead ends: 3752 [2021-11-07 08:03:18,082 INFO L226 Difference]: Without dead ends: 3748 [2021-11-07 08:03:18,083 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:03:18,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3748 states. [2021-11-07 08:03:18,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3748 to 3744. [2021-11-07 08:03:18,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3744 states, 2856 states have (on average 1.7359943977591037) internal successors, (4958), 3710 states have internal predecessors, (4958), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (35), 28 states have call predecessors, (35), 31 states have call successors, (35) [2021-11-07 08:03:18,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3744 states to 3744 states and 5025 transitions. [2021-11-07 08:03:18,156 INFO L78 Accepts]: Start accepts. Automaton has 3744 states and 5025 transitions. Word has length 81 [2021-11-07 08:03:18,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:18,157 INFO L470 AbstractCegarLoop]: Abstraction has 3744 states and 5025 transitions. [2021-11-07 08:03:18,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 08:03:18,157 INFO L276 IsEmpty]: Start isEmpty. Operand 3744 states and 5025 transitions. [2021-11-07 08:03:18,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 08:03:18,158 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:18,158 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:18,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-07 08:03:18,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 08:03:18,374 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr400REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-07 08:03:18,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:18,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1438516215, now seen corresponding path program 2 times [2021-11-07 08:03:18,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 08:03:18,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1720039532] [2021-11-07 08:03:18,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:03:18,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 08:03:18,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 08:03:18,376 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 08:03:18,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67f4b956-8891-4220-942e-7deb2ca63105/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 08:03:19,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-07 08:03:19,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:03:19,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 08:03:19,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:19,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 08:03:19,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:03:19,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:03:19,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 08:03:19,603 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-07 08:03:19,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-07 08:03:19,697 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 08:03:19,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-07 08:03:19,959 INFO L354 Elim1Store]: treesize reduction 229, result has 11.2 percent of original size [2021-11-07 08:03:19,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 66 treesize of output 86 [2021-11-07 08:03:25,483 INFO L354 Elim1Store]: treesize reduction 1963, result has 5.1 percent of original size [2021-11-07 08:03:25,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 39 case distinctions, treesize of input 118 treesize of output 150 [2021-11-07 08:03:35,406 INFO L354 Elim1Store]: treesize reduction 876, result has 0.1 percent of original size [2021-11-07 08:03:35,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 157 treesize of output 67 [2021-11-07 08:03:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 08:03:35,603 INFO L328 TraceCheckSpWp]: Computing backward predicates...