./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/stroeder2-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/stroeder2-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL --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 eb1b14e8511764ce20ab6a88d1bf2bef8398fca052e797a3c06b53051dc2f2a5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:41:47,690 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:41:47,693 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:41:47,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:41:47,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:41:47,760 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:41:47,763 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:41:47,769 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:41:47,772 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:41:47,780 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:41:47,781 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:41:47,784 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:41:47,784 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:41:47,787 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:41:47,790 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:41:47,795 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:41:47,797 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:41:47,799 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:41:47,802 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:41:47,813 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:41:47,815 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:41:47,816 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:41:47,820 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:41:47,821 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:41:47,826 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:41:47,826 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:41:47,827 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:41:47,829 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:41:47,830 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:41:47,832 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:41:47,832 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:41:47,833 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:41:47,840 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:41:47,841 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:41:47,843 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:41:47,844 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:41:47,845 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:41:47,845 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:41:47,845 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:41:47,847 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:41:47,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:41:47,849 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-19 04:41:47,898 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:41:47,899 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:41:47,900 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:41:47,900 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:41:47,909 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:41:47,909 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:41:47,910 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:41:47,911 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:41:47,911 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:41:47,911 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:41:47,913 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:41:47,913 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-19 04:41:47,914 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:41:47,914 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:41:47,914 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:41:47,914 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-19 04:41:47,915 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-19 04:41:47,915 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-19 04:41:47,915 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:41:47,916 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 04:41:47,916 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:41:47,916 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:41:47,917 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:41:47,917 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:41:47,917 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:41:47,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:41:47,918 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:41:47,918 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:41:47,918 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:41:47,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:41:47,919 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:41:47,919 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_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb1b14e8511764ce20ab6a88d1bf2bef8398fca052e797a3c06b53051dc2f2a5 [2021-11-19 04:41:48,219 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:41:48,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:41:48,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:41:48,252 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:41:48,253 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:41:48,255 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/array-memsafety/stroeder2-alloca-1.i [2021-11-19 04:41:48,349 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/data/4c74ee368/7b229894ad5a4f51beb564c74fc20dbe/FLAG284d8ff01 [2021-11-19 04:41:49,009 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:41:49,010 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/sv-benchmarks/c/array-memsafety/stroeder2-alloca-1.i [2021-11-19 04:41:49,029 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/data/4c74ee368/7b229894ad5a4f51beb564c74fc20dbe/FLAG284d8ff01 [2021-11-19 04:41:49,272 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/data/4c74ee368/7b229894ad5a4f51beb564c74fc20dbe [2021-11-19 04:41:49,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:41:49,277 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-19 04:41:49,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:41:49,279 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:41:49,284 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:41:49,285 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:41:49" (1/1) ... [2021-11-19 04:41:49,286 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@589889e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:41:49, skipping insertion in model container [2021-11-19 04:41:49,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:41:49" (1/1) ... [2021-11-19 04:41:49,294 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:41:49,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:41:49,696 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:41:49,707 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) [2021-11-19 04:41:49,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3ed32d8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:41:49, skipping insertion in model container [2021-11-19 04:41:49,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:41:49,716 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.preprocessor [2021-11-19 04:41:49,723 INFO L158 Benchmark]: Toolchain (without parser) took 444.89ms. Allocated memory is still 100.7MB. Free memory was 67.1MB in the beginning and 75.3MB in the end (delta: -8.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-19 04:41:49,724 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 100.7MB. Free memory is still 54.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 04:41:49,726 INFO L158 Benchmark]: CACSL2BoogieTranslator took 437.52ms. Allocated memory is still 100.7MB. Free memory was 66.9MB in the beginning and 75.3MB in the end (delta: -8.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-19 04:41:49,730 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 100.7MB. Free memory is still 54.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 437.52ms. Allocated memory is still 100.7MB. Free memory was 66.9MB in the beginning and 75.3MB in the end (delta: -8.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 532]: 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_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/stroeder2-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL --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 eb1b14e8511764ce20ab6a88d1bf2bef8398fca052e797a3c06b53051dc2f2a5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:41:52,498 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:41:52,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:41:52,574 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:41:52,575 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:41:52,581 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:41:52,583 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:41:52,591 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:41:52,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:41:52,605 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:41:52,607 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:41:52,610 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:41:52,611 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:41:52,614 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:41:52,616 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:41:52,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:41:52,619 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:41:52,621 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:41:52,630 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:41:52,633 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:41:52,636 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:41:52,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:41:52,640 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:41:52,641 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:41:52,646 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:41:52,647 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:41:52,647 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:41:52,649 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:41:52,650 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:41:52,651 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:41:52,652 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:41:52,653 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:41:52,655 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:41:52,656 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:41:52,658 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:41:52,658 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:41:52,660 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:41:52,660 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:41:52,661 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:41:52,662 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:41:52,663 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:41:52,664 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-19 04:41:52,697 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:41:52,698 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:41:52,698 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:41:52,699 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:41:52,700 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:41:52,700 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:41:52,701 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:41:52,701 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:41:52,702 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:41:52,702 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:41:52,702 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:41:52,703 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-19 04:41:52,703 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:41:52,703 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:41:52,704 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:41:52,704 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-19 04:41:52,704 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-19 04:41:52,705 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-19 04:41:52,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:41:52,705 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 04:41:52,706 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 04:41:52,706 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 04:41:52,706 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:41:52,707 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:41:52,707 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:41:52,707 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:41:52,708 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:41:52,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:41:52,709 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:41:52,709 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:41:52,709 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-19 04:41:52,710 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 04:41:52,710 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:41:52,710 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 04:41:52,711 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_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb1b14e8511764ce20ab6a88d1bf2bef8398fca052e797a3c06b53051dc2f2a5 [2021-11-19 04:41:53,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:41:53,176 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:41:53,180 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:41:53,182 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:41:53,182 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:41:53,184 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/array-memsafety/stroeder2-alloca-1.i [2021-11-19 04:41:53,267 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/data/f6c136f4d/fb177e0e6e5445ddaf2aa79b1cc2649e/FLAGa41117060 [2021-11-19 04:41:54,008 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:41:54,014 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/sv-benchmarks/c/array-memsafety/stroeder2-alloca-1.i [2021-11-19 04:41:54,036 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/data/f6c136f4d/fb177e0e6e5445ddaf2aa79b1cc2649e/FLAGa41117060 [2021-11-19 04:41:54,266 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/data/f6c136f4d/fb177e0e6e5445ddaf2aa79b1cc2649e [2021-11-19 04:41:54,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:41:54,273 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-19 04:41:54,275 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:41:54,276 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:41:54,280 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:41:54,281 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:41:54" (1/1) ... [2021-11-19 04:41:54,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ad229de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:41:54, skipping insertion in model container [2021-11-19 04:41:54,283 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:41:54" (1/1) ... [2021-11-19 04:41:54,292 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:41:54,363 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:41:54,765 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:41:54,779 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 04:41:54,787 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:41:54,817 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:41:54,823 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:41:54,904 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:41:54,949 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:41:54,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:41:54 WrapperNode [2021-11-19 04:41:54,950 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:41:54,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:41:54,952 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:41:54,952 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:41:54,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:41:54" (1/1) ... [2021-11-19 04:41:54,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:41:54" (1/1) ... [2021-11-19 04:41:55,003 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:41:54" (1/1) ... [2021-11-19 04:41:55,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:41:54" (1/1) ... [2021-11-19 04:41:55,039 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:41:54" (1/1) ... [2021-11-19 04:41:55,044 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:41:54" (1/1) ... [2021-11-19 04:41:55,049 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:41:54" (1/1) ... [2021-11-19 04:41:55,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:41:55,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:41:55,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:41:55,059 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:41:55,069 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:41:54" (1/1) ... [2021-11-19 04:41:55,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:41:55,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:41:55,111 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:41:55,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:41:55,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-19 04:41:55,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:41:55,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-11-19 04:41:55,162 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-19 04:41:55,162 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-19 04:41:55,163 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-19 04:41:55,163 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-19 04:41:55,163 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-19 04:41:55,163 INFO L138 BoogieDeclarations]: Found implementation of procedure sumOfThirdBytes [2021-11-19 04:41:55,163 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-19 04:41:55,164 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-19 04:41:55,164 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-19 04:41:55,164 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-19 04:41:55,164 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-19 04:41:55,165 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-19 04:41:55,165 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-19 04:41:55,165 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-19 04:41:55,165 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-19 04:41:55,165 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-19 04:41:55,166 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-19 04:41:55,166 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-19 04:41:55,166 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-19 04:41:55,166 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-19 04:41:55,166 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-19 04:41:55,167 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-19 04:41:55,167 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-19 04:41:55,167 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-19 04:41:55,167 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-19 04:41:55,168 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-19 04:41:55,168 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-19 04:41:55,168 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-19 04:41:55,168 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-19 04:41:55,169 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-19 04:41:55,169 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-19 04:41:55,169 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-19 04:41:55,169 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-19 04:41:55,169 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-19 04:41:55,170 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-19 04:41:55,170 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-19 04:41:55,170 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-19 04:41:55,170 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-19 04:41:55,171 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-19 04:41:55,171 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-19 04:41:55,171 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-19 04:41:55,171 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-19 04:41:55,171 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-19 04:41:55,172 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-19 04:41:55,172 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-19 04:41:55,172 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-19 04:41:55,172 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-19 04:41:55,172 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-19 04:41:55,172 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-19 04:41:55,173 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-19 04:41:55,173 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-19 04:41:55,173 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-19 04:41:55,173 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-19 04:41:55,174 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-19 04:41:55,174 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-19 04:41:55,174 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-19 04:41:55,175 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-19 04:41:55,177 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-19 04:41:55,178 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-19 04:41:55,179 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-19 04:41:55,179 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-19 04:41:55,179 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-19 04:41:55,179 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-19 04:41:55,179 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-19 04:41:55,180 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-19 04:41:55,181 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-19 04:41:55,181 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-19 04:41:55,181 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-19 04:41:55,181 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-19 04:41:55,181 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-19 04:41:55,181 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-19 04:41:55,182 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-19 04:41:55,182 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-19 04:41:55,182 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-19 04:41:55,182 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-19 04:41:55,182 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-19 04:41:55,183 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-19 04:41:55,184 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-19 04:41:55,184 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-19 04:41:55,184 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-19 04:41:55,184 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-19 04:41:55,184 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-19 04:41:55,184 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-19 04:41:55,184 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-19 04:41:55,185 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-19 04:41:55,185 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-19 04:41:55,185 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-19 04:41:55,185 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-19 04:41:55,185 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-19 04:41:55,185 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-19 04:41:55,185 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-19 04:41:55,186 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-19 04:41:55,186 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-19 04:41:55,186 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-19 04:41:55,186 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-19 04:41:55,187 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-19 04:41:55,187 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-19 04:41:55,187 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-19 04:41:55,188 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-19 04:41:55,188 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-19 04:41:55,189 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-19 04:41:55,189 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-19 04:41:55,189 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-19 04:41:55,189 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-19 04:41:55,189 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-19 04:41:55,190 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-19 04:41:55,190 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-19 04:41:55,190 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-19 04:41:55,190 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-19 04:41:55,190 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-19 04:41:55,190 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-19 04:41:55,190 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-19 04:41:55,191 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-19 04:41:55,191 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-19 04:41:55,191 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-19 04:41:55,192 INFO L130 BoogieDeclarations]: Found specification of procedure sumOfThirdBytes [2021-11-19 04:41:55,192 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-19 04:41:55,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-19 04:41:55,193 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-19 04:41:55,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 04:41:55,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 04:41:55,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 04:41:55,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-19 04:41:55,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:41:55,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-11-19 04:41:55,199 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 04:41:55,571 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:41:55,575 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:41:55,889 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:41:55,896 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:41:55,896 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-19 04:41:55,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:41:55 BoogieIcfgContainer [2021-11-19 04:41:55,898 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:41:55,900 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:41:55,900 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:41:55,903 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:41:55,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:41:54" (1/3) ... [2021-11-19 04:41:55,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e0347a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:41:55, skipping insertion in model container [2021-11-19 04:41:55,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:41:54" (2/3) ... [2021-11-19 04:41:55,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e0347a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:41:55, skipping insertion in model container [2021-11-19 04:41:55,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:41:55" (3/3) ... [2021-11-19 04:41:55,906 INFO L111 eAbstractionObserver]: Analyzing ICFG stroeder2-alloca-1.i [2021-11-19 04:41:55,912 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:41:55,912 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-11-19 04:41:55,962 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:41:55,971 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 [2021-11-19 04:41:55,971 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-11-19 04:41:55,989 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 32 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:41:55,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-19 04:41:55,998 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:41:56,003 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:41:56,005 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, sumOfThirdBytesErr0REQUIRES_VIOLATION (and 5 more)] === [2021-11-19 04:41:56,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:41:56,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1920451558, now seen corresponding path program 1 times [2021-11-19 04:41:56,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:41:56,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1025921195] [2021-11-19 04:41:56,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:41:56,032 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:41:56,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:41:56,039 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:41:56,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 04:41:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:41:56,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 04:41:56,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:41:56,416 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 [2021-11-19 04:41:56,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:41:56,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:41:56,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:41:56,786 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:41:56,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1025921195] [2021-11-19 04:41:56,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1025921195] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:41:56,788 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:41:56,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-19 04:41:56,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074976008] [2021-11-19 04:41:56,792 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:41:56,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:41:56,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:41:56,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:41:56,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:41:56,845 INFO L87 Difference]: Start difference. First operand has 39 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 32 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 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) [2021-11-19 04:41:57,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:41:57,408 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2021-11-19 04:41:57,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:41:57,411 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 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 10 [2021-11-19 04:41:57,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:41:57,421 INFO L225 Difference]: With dead ends: 64 [2021-11-19 04:41:57,421 INFO L226 Difference]: Without dead ends: 59 [2021-11-19 04:41:57,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:41:57,429 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 41 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:41:57,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 169 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:41:57,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-19 04:41:57,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 40. [2021-11-19 04:41:57,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 34 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:41:57,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-11-19 04:41:57,477 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 10 [2021-11-19 04:41:57,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:41:57,478 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-11-19 04:41:57,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 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) [2021-11-19 04:41:57,478 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-11-19 04:41:57,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-19 04:41:57,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:41:57,479 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:41:57,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 04:41:57,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:41:57,692 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, sumOfThirdBytesErr0REQUIRES_VIOLATION (and 5 more)] === [2021-11-19 04:41:57,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:41:57,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1920451559, now seen corresponding path program 1 times [2021-11-19 04:41:57,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:41:57,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [330153589] [2021-11-19 04:41:57,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:41:57,694 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:41:57,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:41:57,697 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:41:57,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 04:41:57,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:41:57,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 04:41:57,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:41:57,880 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 [2021-11-19 04:41:57,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:41:57,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:41:57,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:41:57,949 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:41:57,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [330153589] [2021-11-19 04:41:57,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [330153589] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:41:57,956 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:41:57,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 04:41:57,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35494440] [2021-11-19 04:41:57,957 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:41:57,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:41:57,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:41:57,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:41:57,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:41:57,960 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-11-19 04:41:58,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:41:58,030 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-11-19 04:41:58,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:41:58,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 10 [2021-11-19 04:41:58,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:41:58,032 INFO L225 Difference]: With dead ends: 39 [2021-11-19 04:41:58,032 INFO L226 Difference]: Without dead ends: 39 [2021-11-19 04:41:58,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:41:58,034 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 5 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:41:58,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 55 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:41:58,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-19 04:41:58,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-19 04:41:58,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 33 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:41:58,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-11-19 04:41:58,053 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 10 [2021-11-19 04:41:58,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:41:58,054 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-11-19 04:41:58,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-11-19 04:41:58,055 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-11-19 04:41:58,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-19 04:41:58,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:41:58,058 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:41:58,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 04:41:58,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:41:58,272 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting sumOfThirdBytesErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, sumOfThirdBytesErr0REQUIRES_VIOLATION (and 5 more)] === [2021-11-19 04:41:58,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:41:58,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1433094193, now seen corresponding path program 1 times [2021-11-19 04:41:58,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:41:58,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1051119288] [2021-11-19 04:41:58,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:41:58,274 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:41:58,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:41:58,278 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:41:58,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 04:41:58,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:41:58,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 04:41:58,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:41:58,471 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 [2021-11-19 04:41:58,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:41:58,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:41:58,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:41:58,621 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:41:58,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1051119288] [2021-11-19 04:41:58,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1051119288] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:41:58,625 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:41:58,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-19 04:41:58,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218942041] [2021-11-19 04:41:58,626 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:41:58,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:41:58,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:41:58,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:41:58,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:41:58,628 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:41:58,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:41:58,822 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-11-19 04:41:58,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:41:58,823 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-19 04:41:58,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:41:58,826 INFO L225 Difference]: With dead ends: 40 [2021-11-19 04:41:58,826 INFO L226 Difference]: Without dead ends: 40 [2021-11-19 04:41:58,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:41:58,828 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 50 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:41:58,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 80 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:41:58,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-19 04:41:58,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2021-11-19 04:41:58,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 30 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:41:58,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-11-19 04:41:58,848 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 13 [2021-11-19 04:41:58,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:41:58,848 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-11-19 04:41:58,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:41:58,849 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-11-19 04:41:58,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-19 04:41:58,850 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:41:58,850 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:41:58,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 04:41:59,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:41:59,065 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting sumOfThirdBytesErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, sumOfThirdBytesErr0REQUIRES_VIOLATION (and 5 more)] === [2021-11-19 04:41:59,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:41:59,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1433094192, now seen corresponding path program 1 times [2021-11-19 04:41:59,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:41:59,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2066032280] [2021-11-19 04:41:59,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:41:59,066 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:41:59,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:41:59,067 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:41:59,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 04:41:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:41:59,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 04:41:59,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:41:59,248 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 17 treesize of output 16 [2021-11-19 04:41:59,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:41:59,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:42:00,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:42:00,159 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:42:00,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2066032280] [2021-11-19 04:42:00,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2066032280] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:42:00,159 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:42:00,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-19 04:42:00,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55321252] [2021-11-19 04:42:00,160 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:42:00,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 04:42:00,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:42:00,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 04:42:00,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:42:00,162 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:42:00,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:42:00,354 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2021-11-19 04:42:00,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:42:00,355 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 3 states have call successors, (4), 3 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 13 [2021-11-19 04:42:00,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:42:00,356 INFO L225 Difference]: With dead ends: 40 [2021-11-19 04:42:00,357 INFO L226 Difference]: Without dead ends: 40 [2021-11-19 04:42:00,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:42:00,358 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 4 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:42:00,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 177 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2021-11-19 04:42:00,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-19 04:42:00,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-11-19 04:42:00,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 32 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:42:00,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-11-19 04:42:00,373 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 13 [2021-11-19 04:42:00,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:42:00,373 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-11-19 04:42:00,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 10 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:42:00,374 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-11-19 04:42:00,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-19 04:42:00,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:42:00,375 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:42:00,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 04:42:00,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:42:00,589 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, sumOfThirdBytesErr0REQUIRES_VIOLATION (and 5 more)] === [2021-11-19 04:42:00,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:42:00,590 INFO L85 PathProgramCache]: Analyzing trace with hash -663520419, now seen corresponding path program 1 times [2021-11-19 04:42:00,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:42:00,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1996361941] [2021-11-19 04:42:00,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:42:00,591 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:42:00,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:42:00,591 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:42:00,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 04:42:00,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:42:00,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 04:42:00,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:42:00,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:42:00,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:42:00,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:42:00,897 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:42:00,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1996361941] [2021-11-19 04:42:00,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1996361941] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:42:00,897 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:42:00,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-19 04:42:00,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36875095] [2021-11-19 04:42:00,898 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:42:00,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:42:00,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:42:00,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:42:00,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:42:00,899 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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) [2021-11-19 04:42:00,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:42:00,985 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2021-11-19 04:42:00,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:42:00,991 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 14 [2021-11-19 04:42:00,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:42:00,992 INFO L225 Difference]: With dead ends: 47 [2021-11-19 04:42:00,992 INFO L226 Difference]: Without dead ends: 47 [2021-11-19 04:42:00,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:42:00,994 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 22 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:42:00,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 112 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:42:00,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-19 04:42:01,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2021-11-19 04:42:01,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 36 states have internal predecessors, (42), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:42:01,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2021-11-19 04:42:01,002 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 14 [2021-11-19 04:42:01,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:42:01,003 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2021-11-19 04:42:01,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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) [2021-11-19 04:42:01,003 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2021-11-19 04:42:01,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-19 04:42:01,004 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:42:01,004 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:42:01,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 04:42:01,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:42:01,222 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting sumOfThirdBytesErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, sumOfThirdBytesErr0REQUIRES_VIOLATION (and 5 more)] === [2021-11-19 04:42:01,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:42:01,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1480984113, now seen corresponding path program 1 times [2021-11-19 04:42:01,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:42:01,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2005818271] [2021-11-19 04:42:01,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:42:01,223 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:42:01,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:42:01,229 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:42:01,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 04:42:01,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:42:01,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 04:42:01,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:42:01,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:42:01,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:42:01,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-11-19 04:42:02,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:42:02,031 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:42:02,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2005818271] [2021-11-19 04:42:02,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2005818271] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:42:02,032 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:42:02,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-19 04:42:02,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827230647] [2021-11-19 04:42:02,032 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:42:02,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 04:42:02,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:42:02,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 04:42:02,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:42:02,034 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:42:02,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:42:02,941 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2021-11-19 04:42:02,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 04:42:02,943 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 3 states have call successors, (4), 3 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 15 [2021-11-19 04:42:02,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:42:02,944 INFO L225 Difference]: With dead ends: 69 [2021-11-19 04:42:02,944 INFO L226 Difference]: Without dead ends: 69 [2021-11-19 04:42:02,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-11-19 04:42:02,945 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 156 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:42:02,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 162 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:42:02,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-19 04:42:02,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 42. [2021-11-19 04:42:02,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:42:02,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-11-19 04:42:02,954 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 15 [2021-11-19 04:42:02,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:42:02,954 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-11-19 04:42:02,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:42:02,955 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-11-19 04:42:02,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-19 04:42:02,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:42:02,956 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:42:02,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 04:42:03,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:42:03,168 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, sumOfThirdBytesErr0REQUIRES_VIOLATION (and 5 more)] === [2021-11-19 04:42:03,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:42:03,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1472867045, now seen corresponding path program 1 times [2021-11-19 04:42:03,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:42:03,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1301491320] [2021-11-19 04:42:03,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:42:03,169 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:42:03,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:42:03,170 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:42:03,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 04:42:03,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:42:03,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 04:42:03,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:42:03,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-19 04:42:03,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:42:03,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:42:04,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:42:04,178 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:42:04,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1301491320] [2021-11-19 04:42:04,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1301491320] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:42:04,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:42:04,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-11-19 04:42:04,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146988165] [2021-11-19 04:42:04,179 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:42:04,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 04:42:04,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:42:04,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 04:42:04,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:42:04,181 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 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) [2021-11-19 04:42:04,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:42:04,554 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2021-11-19 04:42:04,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:42:04,555 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 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 14 [2021-11-19 04:42:04,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:42:04,556 INFO L225 Difference]: With dead ends: 51 [2021-11-19 04:42:04,556 INFO L226 Difference]: Without dead ends: 51 [2021-11-19 04:42:04,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:42:04,557 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 21 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:42:04,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 155 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 81 Invalid, 0 Unknown, 11 Unchecked, 0.3s Time] [2021-11-19 04:42:04,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-19 04:42:04,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2021-11-19 04:42:04,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.205128205128205) internal successors, (47), 41 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:42:04,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2021-11-19 04:42:04,564 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 14 [2021-11-19 04:42:04,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:42:04,565 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2021-11-19 04:42:04,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 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) [2021-11-19 04:42:04,565 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2021-11-19 04:42:04,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-19 04:42:04,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:42:04,566 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:42:04,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 04:42:04,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:42:04,771 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting sumOfThirdBytesErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, sumOfThirdBytesErr0REQUIRES_VIOLATION (and 5 more)] === [2021-11-19 04:42:04,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:42:04,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1497426133, now seen corresponding path program 1 times [2021-11-19 04:42:04,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:42:04,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1870664782] [2021-11-19 04:42:04,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:42:04,773 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:42:04,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:42:04,773 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:42:04,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 04:42:04,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:42:04,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 04:42:04,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:42:04,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-19 04:42:05,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:42:05,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:42:05,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:42:05,638 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:42:05,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1870664782] [2021-11-19 04:42:05,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1870664782] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:42:05,638 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:42:05,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-19 04:42:05,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785231440] [2021-11-19 04:42:05,639 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:42:05,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 04:42:05,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:42:05,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 04:42:05,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:42:05,640 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:42:07,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:42:07,184 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2021-11-19 04:42:07,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 04:42:07,186 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (4), 3 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 17 [2021-11-19 04:42:07,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:42:07,187 INFO L225 Difference]: With dead ends: 93 [2021-11-19 04:42:07,187 INFO L226 Difference]: Without dead ends: 93 [2021-11-19 04:42:07,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-11-19 04:42:07,188 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 155 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:42:07,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 168 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 04:42:07,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-19 04:42:07,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 48. [2021-11-19 04:42:07,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.225) internal successors, (49), 42 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:42:07,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-11-19 04:42:07,212 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 17 [2021-11-19 04:42:07,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:42:07,212 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-11-19 04:42:07,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:42:07,213 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-11-19 04:42:07,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-19 04:42:07,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:42:07,214 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:42:07,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 04:42:07,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:42:07,427 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr2ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, sumOfThirdBytesErr0REQUIRES_VIOLATION (and 5 more)] === [2021-11-19 04:42:07,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:42:07,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1940191949, now seen corresponding path program 1 times [2021-11-19 04:42:07,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:42:07,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1494220041] [2021-11-19 04:42:07,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:42:07,428 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:42:07,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:42:07,429 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:42:07,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 04:42:07,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:42:07,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 04:42:07,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:42:07,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:42:07,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:42:07,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:42:07,712 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:42:07,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1494220041] [2021-11-19 04:42:07,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1494220041] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:42:07,713 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:42:07,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-19 04:42:07,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500912271] [2021-11-19 04:42:07,713 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:42:07,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:42:07,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:42:07,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:42:07,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:42:07,715 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:42:07,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:42:07,792 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2021-11-19 04:42:07,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:42:07,793 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 21 [2021-11-19 04:42:07,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:42:07,794 INFO L225 Difference]: With dead ends: 62 [2021-11-19 04:42:07,794 INFO L226 Difference]: Without dead ends: 59 [2021-11-19 04:42:07,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:42:07,795 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 24 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:42:07,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 109 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:42:07,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-19 04:42:07,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2021-11-19 04:42:07,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.2) internal successors, (48), 42 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:42:07,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-11-19 04:42:07,801 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 21 [2021-11-19 04:42:07,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:42:07,802 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-11-19 04:42:07,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:42:07,802 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-11-19 04:42:07,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-19 04:42:07,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:42:07,804 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:42:07,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 04:42:08,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:42:08,018 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting sumOfThirdBytesErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, sumOfThirdBytesErr0REQUIRES_VIOLATION (and 5 more)] === [2021-11-19 04:42:08,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:42:08,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1975630142, now seen corresponding path program 1 times [2021-11-19 04:42:08,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:42:08,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158358746] [2021-11-19 04:42:08,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:42:08,019 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:42:08,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:42:08,020 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:42:08,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 04:42:08,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:42:08,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 04:42:08,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:42:08,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:42:08,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:42:08,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:42:08,344 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:42:08,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158358746] [2021-11-19 04:42:08,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158358746] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:42:08,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:42:08,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-19 04:42:08,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586580267] [2021-11-19 04:42:08,345 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:42:08,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 04:42:08,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:42:08,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 04:42:08,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:42:08,347 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:42:08,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:42:08,441 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2021-11-19 04:42:08,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:42:08,442 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 3 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 21 [2021-11-19 04:42:08,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:42:08,443 INFO L225 Difference]: With dead ends: 65 [2021-11-19 04:42:08,443 INFO L226 Difference]: Without dead ends: 65 [2021-11-19 04:42:08,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:42:08,445 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 39 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:42:08,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 178 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:42:08,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-19 04:42:08,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2021-11-19 04:42:08,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 55 states have internal predecessors, (61), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:42:08,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2021-11-19 04:42:08,452 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 21 [2021-11-19 04:42:08,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:42:08,453 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2021-11-19 04:42:08,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:42:08,453 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2021-11-19 04:42:08,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-19 04:42:08,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:42:08,455 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:42:08,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 04:42:08,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:42:08,667 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting sumOfThirdBytesErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, sumOfThirdBytesErr0REQUIRES_VIOLATION (and 5 more)] === [2021-11-19 04:42:08,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:42:08,668 INFO L85 PathProgramCache]: Analyzing trace with hash 695766464, now seen corresponding path program 1 times [2021-11-19 04:42:08,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:42:08,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1072191331] [2021-11-19 04:42:08,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:42:08,668 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:42:08,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:42:08,669 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:42:08,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 04:42:08,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:42:08,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 04:42:08,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:42:08,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-19 04:42:09,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:42:09,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:42:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:42:10,328 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:42:10,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1072191331] [2021-11-19 04:42:10,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1072191331] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:42:10,329 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:42:10,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-11-19 04:42:10,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918947011] [2021-11-19 04:42:10,329 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:42:10,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 04:42:10,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:42:10,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 04:42:10,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:42:10,330 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:42:11,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:42:11,452 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2021-11-19 04:42:11,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 04:42:11,453 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 3 states have call successors, (4), 3 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 21 [2021-11-19 04:42:11,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:42:11,454 INFO L225 Difference]: With dead ends: 85 [2021-11-19 04:42:11,454 INFO L226 Difference]: Without dead ends: 85 [2021-11-19 04:42:11,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-11-19 04:42:11,456 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 64 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:42:11,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 169 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 103 Invalid, 0 Unknown, 22 Unchecked, 0.5s Time] [2021-11-19 04:42:11,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-19 04:42:11,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2021-11-19 04:42:11,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 71 states have internal predecessors, (81), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:42:11,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2021-11-19 04:42:11,465 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 21 [2021-11-19 04:42:11,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:42:11,465 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2021-11-19 04:42:11,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:42:11,466 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2021-11-19 04:42:11,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-19 04:42:11,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:42:11,467 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:42:11,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 04:42:11,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:42:11,675 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, sumOfThirdBytesErr0REQUIRES_VIOLATION (and 5 more)] === [2021-11-19 04:42:11,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:42:11,676 INFO L85 PathProgramCache]: Analyzing trace with hash -912234207, now seen corresponding path program 2 times [2021-11-19 04:42:11,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:42:11,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [889557324] [2021-11-19 04:42:11,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:42:11,676 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:42:11,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:42:11,677 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:42:11,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 04:42:11,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:42:11,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:42:11,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 04:42:11,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:42:11,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-19 04:42:12,289 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:42:12,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:42:13,747 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:42:13,747 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:42:13,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [889557324] [2021-11-19 04:42:13,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [889557324] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:42:13,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:42:13,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-11-19 04:42:13,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098850414] [2021-11-19 04:42:13,748 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:42:13,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 04:42:13,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:42:13,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 04:42:13,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:42:13,750 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 14 states have internal predecessors, (35), 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) [2021-11-19 04:42:16,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:42:16,154 INFO L93 Difference]: Finished difference Result 114 states and 128 transitions. [2021-11-19 04:42:16,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 04:42:16,156 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 14 states have internal predecessors, (35), 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 22 [2021-11-19 04:42:16,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:42:16,157 INFO L225 Difference]: With dead ends: 114 [2021-11-19 04:42:16,157 INFO L226 Difference]: Without dead ends: 114 [2021-11-19 04:42:16,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-11-19 04:42:16,159 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 68 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:42:16,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 239 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 189 Invalid, 0 Unknown, 11 Unchecked, 0.9s Time] [2021-11-19 04:42:16,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-19 04:42:16,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 94. [2021-11-19 04:42:16,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 87 states have internal predecessors, (101), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:42:16,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2021-11-19 04:42:16,169 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 22 [2021-11-19 04:42:16,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:42:16,170 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2021-11-19 04:42:16,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 14 states have internal predecessors, (35), 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) [2021-11-19 04:42:16,170 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2021-11-19 04:42:16,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-19 04:42:16,172 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:42:16,172 INFO L514 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] [2021-11-19 04:42:16,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-19 04:42:16,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:42:16,385 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr2ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, sumOfThirdBytesErr0REQUIRES_VIOLATION (and 5 more)] === [2021-11-19 04:42:16,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:42:16,385 INFO L85 PathProgramCache]: Analyzing trace with hash -577610912, now seen corresponding path program 1 times [2021-11-19 04:42:16,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:42:16,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [893141310] [2021-11-19 04:42:16,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:42:16,386 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:42:16,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:42:16,387 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:42:16,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 04:42:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:42:16,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 04:42:16,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:42:16,605 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 0 case distinctions, treesize of input 15 treesize of output 12 [2021-11-19 04:42:16,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:42:16,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:42:22,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:42:22,928 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:42:22,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [893141310] [2021-11-19 04:42:22,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [893141310] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 04:42:22,928 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:42:22,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 04:42:22,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809546755] [2021-11-19 04:42:22,929 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 04:42:22,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:42:22,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:42:22,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:42:22,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=35, Unknown=3, NotChecked=0, Total=56 [2021-11-19 04:42:22,930 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:42:22,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:42:22,987 INFO L93 Difference]: Finished difference Result 123 states and 143 transitions. [2021-11-19 04:42:22,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:42:22,989 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2021-11-19 04:42:22,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:42:22,991 INFO L225 Difference]: With dead ends: 123 [2021-11-19 04:42:22,991 INFO L226 Difference]: Without dead ends: 85 [2021-11-19 04:42:22,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=18, Invalid=35, Unknown=3, NotChecked=0, Total=56 [2021-11-19 04:42:22,992 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 11 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:42:22,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 56 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2021-11-19 04:42:22,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-19 04:42:22,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 68. [2021-11-19 04:42:22,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 63 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:42:22,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2021-11-19 04:42:22,999 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 25 [2021-11-19 04:42:23,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:42:23,000 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2021-11-19 04:42:23,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:42:23,000 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2021-11-19 04:42:23,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-19 04:42:23,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:42:23,002 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:42:23,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 04:42:23,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:42:23,216 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting sumOfThirdBytesErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, sumOfThirdBytesErr0REQUIRES_VIOLATION (and 5 more)] === [2021-11-19 04:42:23,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:42:23,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1885809510, now seen corresponding path program 2 times [2021-11-19 04:42:23,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:42:23,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1906517796] [2021-11-19 04:42:23,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:42:23,220 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:42:23,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:42:23,221 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:42:23,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 04:42:23,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:42:23,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:42:23,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-19 04:42:23,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:42:23,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-19 04:42:24,120 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:42:24,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:42:27,358 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:42:27,358 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:42:27,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1906517796] [2021-11-19 04:42:27,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1906517796] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:42:27,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:42:27,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 23 [2021-11-19 04:42:27,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179540966] [2021-11-19 04:42:27,359 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:42:27,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-19 04:42:27,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:42:27,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-19 04:42:27,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-11-19 04:42:27,361 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 23 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:42:30,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:42:30,262 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2021-11-19 04:42:30,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-19 04:42:30,264 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 3 states have call successors, (4), 3 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 29 [2021-11-19 04:42:30,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:42:30,265 INFO L225 Difference]: With dead ends: 107 [2021-11-19 04:42:30,265 INFO L226 Difference]: Without dead ends: 104 [2021-11-19 04:42:30,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-11-19 04:42:30,267 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 53 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:42:30,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 253 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 199 Invalid, 0 Unknown, 30 Unchecked, 1.5s Time] [2021-11-19 04:42:30,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-19 04:42:30,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 82. [2021-11-19 04:42:30,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 74 states have (on average 1.1891891891891893) internal successors, (88), 75 states have internal predecessors, (88), 5 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:42:30,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2021-11-19 04:42:30,274 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 29 [2021-11-19 04:42:30,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:42:30,274 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2021-11-19 04:42:30,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:42:30,275 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2021-11-19 04:42:30,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 04:42:30,277 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:42:30,277 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:42:30,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 04:42:30,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:42:30,503 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting sumOfThirdBytesErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, sumOfThirdBytesErr0REQUIRES_VIOLATION (and 5 more)] === [2021-11-19 04:42:30,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:42:30,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1568763129, now seen corresponding path program 1 times [2021-11-19 04:42:30,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:42:30,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1414611031] [2021-11-19 04:42:30,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:42:30,505 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:42:30,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:42:30,506 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:42:30,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 04:42:30,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:42:30,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-19 04:42:30,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:42:30,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-19 04:42:31,422 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:42:31,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:42:35,062 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:42:35,063 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:42:35,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1414611031] [2021-11-19 04:42:35,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1414611031] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:42:35,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:42:35,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 23 [2021-11-19 04:42:35,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845738998] [2021-11-19 04:42:35,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:42:35,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-19 04:42:35,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:42:35,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-19 04:42:35,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-11-19 04:42:35,066 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand has 23 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:42:36,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:42:36,553 INFO L93 Difference]: Finished difference Result 118 states and 134 transitions. [2021-11-19 04:42:36,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-19 04:42:36,555 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 3 states have call successors, (4), 3 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 35 [2021-11-19 04:42:36,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:42:36,556 INFO L225 Difference]: With dead ends: 118 [2021-11-19 04:42:36,557 INFO L226 Difference]: Without dead ends: 104 [2021-11-19 04:42:36,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-11-19 04:42:36,558 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 42 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:42:36,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 196 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 135 Invalid, 0 Unknown, 22 Unchecked, 0.9s Time] [2021-11-19 04:42:36,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-19 04:42:36,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2021-11-19 04:42:36,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 85 states have internal predecessors, (100), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:42:36,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 105 transitions. [2021-11-19 04:42:36,564 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 105 transitions. Word has length 35 [2021-11-19 04:42:36,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:42:36,565 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 105 transitions. [2021-11-19 04:42:36,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:42:36,566 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 105 transitions. [2021-11-19 04:42:36,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-19 04:42:36,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:42:36,567 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:42:36,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 04:42:36,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:42:36,785 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting sumOfThirdBytesErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, sumOfThirdBytesErr0REQUIRES_VIOLATION (and 5 more)] === [2021-11-19 04:42:36,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:42:36,786 INFO L85 PathProgramCache]: Analyzing trace with hash -218829738, now seen corresponding path program 3 times [2021-11-19 04:42:36,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:42:36,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1153018673] [2021-11-19 04:42:36,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:42:36,786 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:42:36,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:42:36,788 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:42:36,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 04:42:36,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-19 04:42:36,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:42:36,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-19 04:42:36,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:42:37,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-19 04:42:37,889 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:42:37,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:42:42,908 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:42:42,908 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:42:42,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1153018673] [2021-11-19 04:42:42,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1153018673] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:42:42,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:42:42,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-11-19 04:42:42,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969343874] [2021-11-19 04:42:42,909 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:42:42,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-19 04:42:42,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:42:42,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-19 04:42:42,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-11-19 04:42:42,911 INFO L87 Difference]: Start difference. First operand 91 states and 105 transitions. Second operand has 26 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:42:54,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:42:54,601 INFO L93 Difference]: Finished difference Result 128 states and 142 transitions. [2021-11-19 04:42:54,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-19 04:42:54,603 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 3 states have call successors, (4), 3 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 37 [2021-11-19 04:42:54,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:42:54,604 INFO L225 Difference]: With dead ends: 128 [2021-11-19 04:42:54,604 INFO L226 Difference]: Without dead ends: 97 [2021-11-19 04:42:54,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=285, Invalid=1521, Unknown=0, NotChecked=0, Total=1806 [2021-11-19 04:42:54,606 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 291 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:42:54,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 368 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-19 04:42:54,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-19 04:42:54,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 85. [2021-11-19 04:42:54,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 79 states have (on average 1.1645569620253164) internal successors, (92), 80 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:42:54,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2021-11-19 04:42:54,612 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 37 [2021-11-19 04:42:54,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:42:54,612 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2021-11-19 04:42:54,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:42:54,613 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2021-11-19 04:42:54,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-19 04:42:54,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:42:54,616 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:42:54,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 04:42:54,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:42:54,823 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting sumOfThirdBytesErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, sumOfThirdBytesErr0REQUIRES_VIOLATION (and 5 more)] === [2021-11-19 04:42:54,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:42:54,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1418900832, now seen corresponding path program 4 times [2021-11-19 04:42:54,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:42:54,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1115081806] [2021-11-19 04:42:54,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:42:54,824 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:42:54,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:42:54,825 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:42:54,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 04:42:54,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:42:54,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:42:54,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 04:42:54,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:42:54,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-19 04:42:55,902 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:42:55,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:42:59,205 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:42:59,206 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:42:59,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1115081806] [2021-11-19 04:42:59,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1115081806] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:42:59,206 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:42:59,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-11-19 04:42:59,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272732563] [2021-11-19 04:42:59,207 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:42:59,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-19 04:42:59,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:42:59,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-19 04:42:59,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-11-19 04:42:59,208 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand has 26 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:43:06,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:43:06,771 INFO L93 Difference]: Finished difference Result 114 states and 128 transitions. [2021-11-19 04:43:06,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-19 04:43:06,773 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 3 states have call successors, (4), 3 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 37 [2021-11-19 04:43:06,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:43:06,774 INFO L225 Difference]: With dead ends: 114 [2021-11-19 04:43:06,774 INFO L226 Difference]: Without dead ends: 114 [2021-11-19 04:43:06,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=260, Invalid=1222, Unknown=0, NotChecked=0, Total=1482 [2021-11-19 04:43:06,775 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 230 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:43:06,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 290 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 396 Invalid, 0 Unknown, 37 Unchecked, 2.2s Time] [2021-11-19 04:43:06,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-19 04:43:06,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 100. [2021-11-19 04:43:06,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 94 states have (on average 1.148936170212766) internal successors, (108), 95 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:43:06,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 112 transitions. [2021-11-19 04:43:06,781 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 112 transitions. Word has length 37 [2021-11-19 04:43:06,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:43:06,781 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 112 transitions. [2021-11-19 04:43:06,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:43:06,782 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 112 transitions. [2021-11-19 04:43:06,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-19 04:43:06,783 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:43:06,783 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:43:06,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-19 04:43:06,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:43:06,987 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, sumOfThirdBytesErr0REQUIRES_VIOLATION (and 5 more)] === [2021-11-19 04:43:06,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:43:06,988 INFO L85 PathProgramCache]: Analyzing trace with hash 277831469, now seen corresponding path program 3 times [2021-11-19 04:43:06,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:43:06,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1758039034] [2021-11-19 04:43:06,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:43:06,988 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:43:06,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:43:06,989 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:43:06,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 04:43:07,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-19 04:43:07,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:43:07,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 04:43:07,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:43:07,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-19 04:43:08,095 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:43:08,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:43:12,577 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:43:12,578 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:43:12,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1758039034] [2021-11-19 04:43:12,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1758039034] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:43:12,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:43:12,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2021-11-19 04:43:12,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845631483] [2021-11-19 04:43:12,581 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:43:12,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-19 04:43:12,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:43:12,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-19 04:43:12,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2021-11-19 04:43:12,582 INFO L87 Difference]: Start difference. First operand 100 states and 112 transitions. Second operand has 24 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 24 states have internal predecessors, (67), 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) [2021-11-19 04:43:42,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:43:42,081 INFO L93 Difference]: Finished difference Result 143 states and 163 transitions. [2021-11-19 04:43:42,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-19 04:43:42,082 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 24 states have internal predecessors, (67), 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 38 [2021-11-19 04:43:42,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:43:42,083 INFO L225 Difference]: With dead ends: 143 [2021-11-19 04:43:42,083 INFO L226 Difference]: Without dead ends: 143 [2021-11-19 04:43:42,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=739, Invalid=1613, Unknown=0, NotChecked=0, Total=2352 [2021-11-19 04:43:42,085 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 166 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:43:42,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 259 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 386 Invalid, 0 Unknown, 42 Unchecked, 4.3s Time] [2021-11-19 04:43:42,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-19 04:43:42,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 132. [2021-11-19 04:43:42,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 126 states have (on average 1.1746031746031746) internal successors, (148), 127 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:43:42,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 152 transitions. [2021-11-19 04:43:42,096 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 152 transitions. Word has length 38 [2021-11-19 04:43:42,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:43:42,096 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 152 transitions. [2021-11-19 04:43:42,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 24 states have internal predecessors, (67), 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) [2021-11-19 04:43:42,097 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 152 transitions. [2021-11-19 04:43:42,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-19 04:43:42,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:43:42,098 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:43:42,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 04:43:42,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:43:42,307 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting sumOfThirdBytesErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, sumOfThirdBytesErr0REQUIRES_VIOLATION (and 5 more)] === [2021-11-19 04:43:42,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:43:42,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1936179180, now seen corresponding path program 5 times [2021-11-19 04:43:42,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:43:42,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1322908802] [2021-11-19 04:43:42,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:43:42,308 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:43:42,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:43:42,309 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:43:42,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 04:43:42,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-19 04:43:42,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:43:42,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-19 04:43:42,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:43:42,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-19 04:43:43,434 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 54 proven. 47 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:43:43,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:43:50,093 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:43:50,093 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:43:50,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1322908802] [2021-11-19 04:43:50,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1322908802] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:43:50,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:43:50,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 33 [2021-11-19 04:43:50,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632491027] [2021-11-19 04:43:50,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:43:50,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-19 04:43:50,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:43:50,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-19 04:43:50,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-11-19 04:43:50,096 INFO L87 Difference]: Start difference. First operand 132 states and 152 transitions. Second operand has 33 states, 31 states have (on average 2.838709677419355) internal successors, (88), 31 states have internal predecessors, (88), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:43:59,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:43:59,120 INFO L93 Difference]: Finished difference Result 255 states and 292 transitions. [2021-11-19 04:43:59,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-19 04:43:59,121 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.838709677419355) internal successors, (88), 31 states have internal predecessors, (88), 3 states have call successors, (4), 3 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 53 [2021-11-19 04:43:59,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:43:59,124 INFO L225 Difference]: With dead ends: 255 [2021-11-19 04:43:59,124 INFO L226 Difference]: Without dead ends: 252 [2021-11-19 04:43:59,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=182, Invalid=1458, Unknown=0, NotChecked=0, Total=1640 [2021-11-19 04:43:59,126 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 96 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:43:59,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 743 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 672 Invalid, 0 Unknown, 98 Unchecked, 6.0s Time] [2021-11-19 04:43:59,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-19 04:43:59,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 162. [2021-11-19 04:43:59,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 154 states have (on average 1.1818181818181819) internal successors, (182), 155 states have internal predecessors, (182), 5 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:43:59,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 188 transitions. [2021-11-19 04:43:59,134 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 188 transitions. Word has length 53 [2021-11-19 04:43:59,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:43:59,134 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 188 transitions. [2021-11-19 04:43:59,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.838709677419355) internal successors, (88), 31 states have internal predecessors, (88), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:43:59,134 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 188 transitions. [2021-11-19 04:43:59,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-19 04:43:59,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:43:59,136 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:43:59,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 04:43:59,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:43:59,349 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting sumOfThirdBytesErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, sumOfThirdBytesErr0REQUIRES_VIOLATION (and 5 more)] === [2021-11-19 04:43:59,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:43:59,349 INFO L85 PathProgramCache]: Analyzing trace with hash -415000961, now seen corresponding path program 2 times [2021-11-19 04:43:59,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:43:59,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [603166132] [2021-11-19 04:43:59,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:43:59,350 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:43:59,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:43:59,351 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:43:59,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 04:43:59,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:43:59,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:43:59,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-19 04:43:59,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:43:59,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-19 04:44:00,520 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 60 proven. 54 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 04:44:00,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:44:07,284 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:44:07,285 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:44:07,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [603166132] [2021-11-19 04:44:07,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [603166132] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:44:07,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:44:07,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 33 [2021-11-19 04:44:07,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676551314] [2021-11-19 04:44:07,286 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:44:07,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-19 04:44:07,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:44:07,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-19 04:44:07,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-11-19 04:44:07,288 INFO L87 Difference]: Start difference. First operand 162 states and 188 transitions. Second operand has 33 states, 31 states have (on average 3.161290322580645) internal successors, (98), 31 states have internal predecessors, (98), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:44:20,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:44:20,138 INFO L93 Difference]: Finished difference Result 362 states and 413 transitions. [2021-11-19 04:44:20,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-19 04:44:20,140 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 3.161290322580645) internal successors, (98), 31 states have internal predecessors, (98), 3 states have call successors, (4), 3 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 59 [2021-11-19 04:44:20,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:44:20,142 INFO L225 Difference]: With dead ends: 362 [2021-11-19 04:44:20,142 INFO L226 Difference]: Without dead ends: 346 [2021-11-19 04:44:20,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=217, Invalid=1853, Unknown=0, NotChecked=0, Total=2070 [2021-11-19 04:44:20,144 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 92 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:44:20,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 920 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 897 Invalid, 0 Unknown, 125 Unchecked, 7.7s Time] [2021-11-19 04:44:20,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-11-19 04:44:20,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 150. [2021-11-19 04:44:20,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 142 states have (on average 1.176056338028169) internal successors, (167), 143 states have internal predecessors, (167), 5 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:44:20,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 173 transitions. [2021-11-19 04:44:20,152 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 173 transitions. Word has length 59 [2021-11-19 04:44:20,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:44:20,152 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 173 transitions. [2021-11-19 04:44:20,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 3.161290322580645) internal successors, (98), 31 states have internal predecessors, (98), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:44:20,153 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 173 transitions. [2021-11-19 04:44:20,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-19 04:44:20,154 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:44:20,154 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:44:20,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 04:44:20,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:44:20,367 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting sumOfThirdBytesErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, sumOfThirdBytesErr0REQUIRES_VIOLATION (and 5 more)] === [2021-11-19 04:44:20,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:44:20,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1764937535, now seen corresponding path program 3 times [2021-11-19 04:44:20,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:44:20,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [67958262] [2021-11-19 04:44:20,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:44:20,368 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:44:20,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:44:20,369 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:44:20,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 04:44:20,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-19 04:44:20,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:44:20,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-19 04:44:20,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:44:20,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-19 04:44:22,473 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 78 proven. 29 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 04:44:22,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:45:03,631 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 04:45:03,632 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:45:03,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [67958262] [2021-11-19 04:45:03,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [67958262] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:45:03,632 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:45:03,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 35 [2021-11-19 04:45:03,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074680464] [2021-11-19 04:45:03,633 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:45:03,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-19 04:45:03,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:45:03,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-19 04:45:03,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1038, Unknown=4, NotChecked=0, Total=1190 [2021-11-19 04:45:03,635 INFO L87 Difference]: Start difference. First operand 150 states and 173 transitions. Second operand has 35 states, 33 states have (on average 2.696969696969697) internal successors, (89), 33 states have internal predecessors, (89), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:45:07,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:45:07,738 INFO L93 Difference]: Finished difference Result 293 states and 335 transitions. [2021-11-19 04:45:07,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 04:45:07,741 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.696969696969697) internal successors, (89), 33 states have internal predecessors, (89), 3 states have call successors, (4), 3 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 59 [2021-11-19 04:45:07,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:45:07,743 INFO L225 Difference]: With dead ends: 293 [2021-11-19 04:45:07,743 INFO L226 Difference]: Without dead ends: 284 [2021-11-19 04:45:07,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=248, Invalid=1554, Unknown=4, NotChecked=0, Total=1806 [2021-11-19 04:45:07,748 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 39 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:45:07,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 446 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 148 Invalid, 0 Unknown, 179 Unchecked, 1.3s Time] [2021-11-19 04:45:07,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-11-19 04:45:07,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 264. [2021-11-19 04:45:07,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 256 states have (on average 1.18359375) internal successors, (303), 257 states have internal predecessors, (303), 5 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:45:07,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 309 transitions. [2021-11-19 04:45:07,765 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 309 transitions. Word has length 59 [2021-11-19 04:45:07,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:45:07,765 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 309 transitions. [2021-11-19 04:45:07,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.696969696969697) internal successors, (89), 33 states have internal predecessors, (89), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:45:07,766 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 309 transitions. [2021-11-19 04:45:07,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-19 04:45:07,767 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:45:07,767 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:45:07,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 04:45:07,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:45:07,982 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting sumOfThirdBytesErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, sumOfThirdBytesErr0REQUIRES_VIOLATION (and 5 more)] === [2021-11-19 04:45:07,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:45:07,982 INFO L85 PathProgramCache]: Analyzing trace with hash -811874596, now seen corresponding path program 6 times [2021-11-19 04:45:07,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:45:07,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1562017612] [2021-11-19 04:45:07,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:45:07,983 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:45:07,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:45:07,983 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:45:07,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 04:45:08,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-19 04:45:08,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:45:08,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-19 04:45:08,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:45:08,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-19 04:45:11,000 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 8 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:45:11,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:45:20,218 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:45:20,218 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:45:20,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1562017612] [2021-11-19 04:45:20,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1562017612] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:45:20,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:45:20,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-11-19 04:45:20,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500616797] [2021-11-19 04:45:20,219 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:45:20,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-19 04:45:20,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:45:20,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-19 04:45:20,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1062, Unknown=0, NotChecked=0, Total=1260 [2021-11-19 04:45:20,221 INFO L87 Difference]: Start difference. First operand 264 states and 309 transitions. Second operand has 36 states, 34 states have (on average 3.264705882352941) internal successors, (111), 34 states have internal predecessors, (111), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:45:47,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:45:47,700 INFO L93 Difference]: Finished difference Result 287 states and 323 transitions. [2021-11-19 04:45:47,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-19 04:45:47,703 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 3.264705882352941) internal successors, (111), 34 states have internal predecessors, (111), 3 states have call successors, (4), 3 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 [2021-11-19 04:45:47,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:45:47,704 INFO L225 Difference]: With dead ends: 287 [2021-11-19 04:45:47,704 INFO L226 Difference]: Without dead ends: 165 [2021-11-19 04:45:47,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=523, Invalid=3383, Unknown=0, NotChecked=0, Total=3906 [2021-11-19 04:45:47,707 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 380 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:45:47,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 791 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1237 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2021-11-19 04:45:47,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-19 04:45:47,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 149. [2021-11-19 04:45:47,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 143 states have (on average 1.1608391608391608) internal successors, (166), 144 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:45:47,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 170 transitions. [2021-11-19 04:45:47,712 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 170 transitions. Word has length 61 [2021-11-19 04:45:47,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:45:47,713 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 170 transitions. [2021-11-19 04:45:47,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 3.264705882352941) internal successors, (111), 34 states have internal predecessors, (111), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:45:47,718 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 170 transitions. [2021-11-19 04:45:47,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-19 04:45:47,719 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:45:47,720 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:45:47,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 04:45:47,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:45:47,933 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting sumOfThirdBytesErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, sumOfThirdBytesErr0REQUIRES_VIOLATION (and 5 more)] === [2021-11-19 04:45:47,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:45:47,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1219645734, now seen corresponding path program 7 times [2021-11-19 04:45:47,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:45:47,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2015943720] [2021-11-19 04:45:47,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:45:47,934 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:45:47,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:45:47,935 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:45:47,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 04:45:48,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:45:48,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-19 04:45:48,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:45:48,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-19 04:45:51,285 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 26 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:45:51,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:46:03,693 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:46:03,693 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:46:03,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2015943720] [2021-11-19 04:46:03,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2015943720] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:46:03,693 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:46:03,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 41 [2021-11-19 04:46:03,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389838755] [2021-11-19 04:46:03,693 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:46:03,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-19 04:46:03,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:46:03,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-19 04:46:03,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1428, Unknown=0, NotChecked=0, Total=1640 [2021-11-19 04:46:03,695 INFO L87 Difference]: Start difference. First operand 149 states and 170 transitions. Second operand has 41 states, 39 states have (on average 2.8461538461538463) internal successors, (111), 39 states have internal predecessors, (111), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:46:19,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:19,097 INFO L93 Difference]: Finished difference Result 226 states and 258 transitions. [2021-11-19 04:46:19,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-19 04:46:19,100 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 2.8461538461538463) internal successors, (111), 39 states have internal predecessors, (111), 3 states have call successors, (4), 3 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 [2021-11-19 04:46:19,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:19,102 INFO L225 Difference]: With dead ends: 226 [2021-11-19 04:46:19,102 INFO L226 Difference]: Without dead ends: 223 [2021-11-19 04:46:19,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=464, Invalid=2842, Unknown=0, NotChecked=0, Total=3306 [2021-11-19 04:46:19,104 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 204 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:19,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 510 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 499 Invalid, 0 Unknown, 59 Unchecked, 5.2s Time] [2021-11-19 04:46:19,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-11-19 04:46:19,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 201. [2021-11-19 04:46:19,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 193 states have (on average 1.1761658031088082) internal successors, (227), 194 states have internal predecessors, (227), 5 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:46:19,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 233 transitions. [2021-11-19 04:46:19,112 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 233 transitions. Word has length 61 [2021-11-19 04:46:19,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:19,112 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 233 transitions. [2021-11-19 04:46:19,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 2.8461538461538463) internal successors, (111), 39 states have internal predecessors, (111), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:46:19,113 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 233 transitions. [2021-11-19 04:46:19,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-19 04:46:19,114 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:19,114 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:19,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-19 04:46:19,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:46:19,327 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting sumOfThirdBytesErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, sumOfThirdBytesErr0REQUIRES_VIOLATION (and 5 more)] === [2021-11-19 04:46:19,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:19,328 INFO L85 PathProgramCache]: Analyzing trace with hash -2067184967, now seen corresponding path program 4 times [2021-11-19 04:46:19,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:46:19,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [514095006] [2021-11-19 04:46:19,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:46:19,329 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:46:19,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:46:19,330 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:46:19,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 04:46:19,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:46:19,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:46:19,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-19 04:46:19,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:19,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-19 04:46:23,044 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 28 proven. 128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:46:23,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:46:35,565 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:46:35,565 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:46:35,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [514095006] [2021-11-19 04:46:35,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [514095006] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:46:35,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:46:35,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 41 [2021-11-19 04:46:35,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268287446] [2021-11-19 04:46:35,566 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:46:35,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-19 04:46:35,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:46:35,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-19 04:46:35,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1428, Unknown=0, NotChecked=0, Total=1640 [2021-11-19 04:46:35,567 INFO L87 Difference]: Start difference. First operand 201 states and 233 transitions. Second operand has 41 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 39 states have internal predecessors, (121), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:46:51,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:46:51,860 INFO L93 Difference]: Finished difference Result 282 states and 323 transitions. [2021-11-19 04:46:51,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-19 04:46:51,863 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 39 states have internal predecessors, (121), 3 states have call successors, (4), 3 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 67 [2021-11-19 04:46:51,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:46:51,865 INFO L225 Difference]: With dead ends: 282 [2021-11-19 04:46:51,865 INFO L226 Difference]: Without dead ends: 269 [2021-11-19 04:46:51,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=481, Invalid=3059, Unknown=0, NotChecked=0, Total=3540 [2021-11-19 04:46:51,867 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 178 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:46:51,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 573 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 527 Invalid, 0 Unknown, 33 Unchecked, 4.8s Time] [2021-11-19 04:46:51,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-11-19 04:46:51,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 201. [2021-11-19 04:46:51,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 193 states have (on average 1.1709844559585492) internal successors, (226), 194 states have internal predecessors, (226), 5 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:46:51,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 232 transitions. [2021-11-19 04:46:51,884 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 232 transitions. Word has length 67 [2021-11-19 04:46:51,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:46:51,885 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 232 transitions. [2021-11-19 04:46:51,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 39 states have internal predecessors, (121), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:46:51,885 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 232 transitions. [2021-11-19 04:46:51,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-19 04:46:51,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:46:51,887 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:46:51,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 04:46:52,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:46:52,100 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting sumOfThirdBytesErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, sumOfThirdBytesErr0REQUIRES_VIOLATION (and 5 more)] === [2021-11-19 04:46:52,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:46:52,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1256012665, now seen corresponding path program 5 times [2021-11-19 04:46:52,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:46:52,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988838608] [2021-11-19 04:46:52,102 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:46:52,102 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:46:52,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:46:52,103 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:46:52,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 04:46:52,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-19 04:46:52,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:46:52,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-19 04:46:52,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:46:52,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-19 04:46:55,554 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 28 proven. 128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:46:55,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:47:12,274 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:47:12,274 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:47:12,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988838608] [2021-11-19 04:47:12,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988838608] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:47:12,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:47:12,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 43 [2021-11-19 04:47:12,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100825737] [2021-11-19 04:47:12,275 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:47:12,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-19 04:47:12,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:47:12,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-19 04:47:12,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1594, Unknown=0, NotChecked=0, Total=1806 [2021-11-19 04:47:12,276 INFO L87 Difference]: Start difference. First operand 201 states and 232 transitions. Second operand has 43 states, 41 states have (on average 2.951219512195122) internal successors, (121), 41 states have internal predecessors, (121), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:47:22,091 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:47:23,884 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:47:30,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:47:30,131 INFO L93 Difference]: Finished difference Result 423 states and 487 transitions. [2021-11-19 04:47:30,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-19 04:47:30,134 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 2.951219512195122) internal successors, (121), 41 states have internal predecessors, (121), 3 states have call successors, (4), 3 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 67 [2021-11-19 04:47:30,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:47:30,136 INFO L225 Difference]: With dead ends: 423 [2021-11-19 04:47:30,136 INFO L226 Difference]: Without dead ends: 420 [2021-11-19 04:47:30,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=342, Invalid=2628, Unknown=0, NotChecked=0, Total=2970 [2021-11-19 04:47:30,138 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 136 mSDsluCounter, 1009 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:47:30,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 1056 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 833 Invalid, 0 Unknown, 139 Unchecked, 11.5s Time] [2021-11-19 04:47:30,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-11-19 04:47:30,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 254. [2021-11-19 04:47:30,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 245 states have (on average 1.1755102040816328) internal successors, (288), 246 states have internal predecessors, (288), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:47:30,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 295 transitions. [2021-11-19 04:47:30,147 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 295 transitions. Word has length 67 [2021-11-19 04:47:30,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:47:30,148 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 295 transitions. [2021-11-19 04:47:30,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 2.951219512195122) internal successors, (121), 41 states have internal predecessors, (121), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:47:30,148 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 295 transitions. [2021-11-19 04:47:30,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-19 04:47:30,150 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:47:30,150 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:47:30,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 04:47:30,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:47:30,366 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting sumOfThirdBytesErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, sumOfThirdBytesErr0REQUIRES_VIOLATION (and 5 more)] === [2021-11-19 04:47:30,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:47:30,366 INFO L85 PathProgramCache]: Analyzing trace with hash -2134453191, now seen corresponding path program 6 times [2021-11-19 04:47:30,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:47:30,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1854510358] [2021-11-19 04:47:30,367 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:47:30,367 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:47:30,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:47:30,368 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:47:30,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 04:47:30,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-19 04:47:30,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:47:30,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-19 04:47:30,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:47:30,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-19 04:47:33,391 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-19 04:47:33,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:47:44,370 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 1 proven. 111 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-19 04:47:44,370 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:47:44,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1854510358] [2021-11-19 04:47:44,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1854510358] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:47:44,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:47:44,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2021-11-19 04:47:44,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711178616] [2021-11-19 04:47:44,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:47:44,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-19 04:47:44,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:47:44,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-19 04:47:44,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=899, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 04:47:44,372 INFO L87 Difference]: Start difference. First operand 254 states and 295 transitions. Second operand has 34 states, 33 states have (on average 2.757575757575758) internal successors, (91), 32 states have internal predecessors, (91), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:47:52,659 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:47:54,727 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:48:06,549 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:48:08,580 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:48:15,942 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:48:17,983 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:48:35,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:48:35,121 INFO L93 Difference]: Finished difference Result 320 states and 368 transitions. [2021-11-19 04:48:35,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 04:48:35,123 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.757575757575758) internal successors, (91), 32 states have internal predecessors, (91), 3 states have call successors, (4), 3 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 67 [2021-11-19 04:48:35,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:48:35,125 INFO L225 Difference]: With dead ends: 320 [2021-11-19 04:48:35,125 INFO L226 Difference]: Without dead ends: 320 [2021-11-19 04:48:35,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 40.7s TimeCoverageRelationStatistics Valid=861, Invalid=2921, Unknown=0, NotChecked=0, Total=3782 [2021-11-19 04:48:35,127 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 842 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 123 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 17.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:48:35,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [842 Valid, 578 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 648 Invalid, 6 Unknown, 38 Unchecked, 17.5s Time] [2021-11-19 04:48:35,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-11-19 04:48:35,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 223. [2021-11-19 04:48:35,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 216 states have (on average 1.1481481481481481) internal successors, (248), 217 states have internal predecessors, (248), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:48:35,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 253 transitions. [2021-11-19 04:48:35,136 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 253 transitions. Word has length 67 [2021-11-19 04:48:35,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:48:35,137 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 253 transitions. [2021-11-19 04:48:35,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.757575757575758) internal successors, (91), 32 states have internal predecessors, (91), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:48:35,137 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 253 transitions. [2021-11-19 04:48:35,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-19 04:48:35,138 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:48:35,138 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:48:35,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-19 04:48:35,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:48:35,352 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, sumOfThirdBytesErr0REQUIRES_VIOLATION (and 5 more)] === [2021-11-19 04:48:35,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:48:35,353 INFO L85 PathProgramCache]: Analyzing trace with hash 41714501, now seen corresponding path program 4 times [2021-11-19 04:48:35,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:48:35,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1876316169] [2021-11-19 04:48:35,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:48:35,354 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:48:35,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:48:35,355 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:48:35,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 04:48:35,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:48:35,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:48:35,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-19 04:48:35,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:48:35,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-19 04:48:39,042 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:48:39,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:48:54,827 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:48:54,827 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:48:54,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1876316169] [2021-11-19 04:48:54,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1876316169] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:48:54,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:48:54,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2021-11-19 04:48:54,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682805905] [2021-11-19 04:48:54,828 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:48:54,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-19 04:48:54,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:48:54,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-19 04:48:54,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2021-11-19 04:48:54,831 INFO L87 Difference]: Start difference. First operand 223 states and 253 transitions. Second operand has 46 states, 45 states have (on average 2.911111111111111) internal successors, (131), 46 states have internal predecessors, (131), 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) [2021-11-19 04:49:16,938 WARN L227 SmtUtils]: Spent 13.52s on a formula simplification that was a NOOP. DAG size: 171 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:49:18,955 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:49:20,965 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:49:22,968 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:49:24,979 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:49:36,589 WARN L227 SmtUtils]: Spent 10.87s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:50:00,495 WARN L227 SmtUtils]: Spent 22.34s on a formula simplification. DAG size of input: 163 DAG size of output: 163 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:50:11,224 WARN L227 SmtUtils]: Spent 10.01s on a formula simplification that was a NOOP. DAG size: 167 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:50:13,239 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:50:15,290 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:50:17,293 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:50:19,306 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:50:28,491 WARN L227 SmtUtils]: Spent 8.49s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:50:45,815 WARN L227 SmtUtils]: Spent 16.45s on a formula simplification. DAG size of input: 152 DAG size of output: 152 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:50:56,034 WARN L227 SmtUtils]: Spent 9.56s on a formula simplification that was a NOOP. DAG size: 156 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:50:58,049 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:51:00,074 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:51:02,077 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:51:04,080 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:51:12,650 WARN L227 SmtUtils]: Spent 7.93s on a formula simplification that was a NOOP. DAG size: 146 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:51:28,034 WARN L227 SmtUtils]: Spent 14.40s on a formula simplification. DAG size of input: 141 DAG size of output: 141 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:51:36,805 WARN L227 SmtUtils]: Spent 7.74s on a formula simplification that was a NOOP. DAG size: 145 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:51:38,819 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:51:40,866 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:51:42,869 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:51:44,872 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:51:51,305 WARN L227 SmtUtils]: Spent 5.61s on a formula simplification that was a NOOP. DAG size: 136 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:52:03,629 WARN L227 SmtUtils]: Spent 11.38s on a formula simplification. DAG size of input: 131 DAG size of output: 131 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:52:11,430 WARN L227 SmtUtils]: Spent 6.90s on a formula simplification that was a NOOP. DAG size: 135 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:52:13,444 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:52:15,447 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:52:17,514 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:52:19,518 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:52:25,959 WARN L227 SmtUtils]: Spent 5.75s on a formula simplification that was a NOOP. DAG size: 125 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:52:37,005 WARN L227 SmtUtils]: Spent 10.05s on a formula simplification. DAG size of input: 120 DAG size of output: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:52:43,051 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:52:45,188 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:52:47,192 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:52:59,181 WARN L227 SmtUtils]: Spent 6.91s on a formula simplification. DAG size of input: 109 DAG size of output: 109 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:53:05,237 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:53:07,269 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:53:17,915 WARN L227 SmtUtils]: Spent 6.03s on a formula simplification. DAG size of input: 98 DAG size of output: 98 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 04:53:23,236 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:53:35,262 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 04:54:01,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:54:01,328 INFO L93 Difference]: Finished difference Result 311 states and 357 transitions. [2021-11-19 04:54:01,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-11-19 04:54:01,330 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.911111111111111) internal successors, (131), 46 states have internal predecessors, (131), 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 70 [2021-11-19 04:54:01,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:54:01,331 INFO L225 Difference]: With dead ends: 311 [2021-11-19 04:54:01,331 INFO L226 Difference]: Without dead ends: 311 [2021-11-19 04:54:01,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3687 ImplicationChecksByTransitivity, 253.7s TimeCoverageRelationStatistics Valid=3164, Invalid=6936, Unknown=0, NotChecked=0, Total=10100 [2021-11-19 04:54:01,336 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 650 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 1411 mSolverCounterSat, 158 mSolverCounterUnsat, 25 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 63.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 1700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1411 IncrementalHoareTripleChecker+Invalid, 25 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 64.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:54:01,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [650 Valid, 627 Invalid, 1700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1411 Invalid, 25 Unknown, 106 Unchecked, 64.2s Time] [2021-11-19 04:54:01,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-11-19 04:54:01,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 287. [2021-11-19 04:54:01,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 280 states have (on average 1.1714285714285715) internal successors, (328), 281 states have internal predecessors, (328), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:54:01,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 333 transitions. [2021-11-19 04:54:01,344 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 333 transitions. Word has length 70 [2021-11-19 04:54:01,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:54:01,345 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 333 transitions. [2021-11-19 04:54:01,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.911111111111111) internal successors, (131), 46 states have internal predecessors, (131), 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) [2021-11-19 04:54:01,345 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 333 transitions. [2021-11-19 04:54:01,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-19 04:54:01,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:54:01,347 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:54:01,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-19 04:54:01,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 [2021-11-19 04:54:01,555 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting sumOfThirdBytesErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, sumOfThirdBytesErr0REQUIRES_VIOLATION (and 5 more)] === [2021-11-19 04:54:01,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:54:01,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1231720091, now seen corresponding path program 8 times [2021-11-19 04:54:01,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-19 04:54:01,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1723893684] [2021-11-19 04:54:01,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:54:01,556 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 04:54:01,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat [2021-11-19 04:54:01,557 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 04:54:01,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268aaf3-8888-4551-86ee-5ab2c9c5ac66/bin/uautomizer-ZXIjhQolGL/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-19 04:54:01,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:54:01,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:54:01,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-19 04:54:01,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:54:01,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-19 04:54:04,905 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 238 proven. 194 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-19 04:54:04,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:54:26,392 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:54:26,393 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-19 04:54:26,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1723893684] [2021-11-19 04:54:26,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1723893684] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:54:26,393 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:54:26,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 30] total 51 [2021-11-19 04:54:26,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004751944] [2021-11-19 04:54:26,393 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:54:26,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-19 04:54:26,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-19 04:54:26,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-19 04:54:26,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=2308, Unknown=0, NotChecked=0, Total=2550 [2021-11-19 04:54:26,396 INFO L87 Difference]: Start difference. First operand 287 states and 333 transitions. Second operand has 51 states, 49 states have (on average 3.2653061224489797) internal successors, (160), 49 states have internal predecessors, (160), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:55:30,951 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []