./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU --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 765142a1ef820c0c2cf2fa98a3978a1412f5a1196c629c20848264001100dcc9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:35:17,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:35:17,385 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:35:17,417 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:35:17,417 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:35:17,419 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:35:17,421 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:35:17,423 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:35:17,425 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:35:17,427 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:35:17,428 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:35:17,430 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:35:17,430 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:35:17,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:35:17,433 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:35:17,435 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:35:17,436 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:35:17,438 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:35:17,440 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:35:17,442 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:35:17,444 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:35:17,446 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:35:17,448 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:35:17,449 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:35:17,453 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:35:17,454 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:35:17,454 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:35:17,456 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:35:17,456 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:35:17,458 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:35:17,458 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:35:17,459 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:35:17,460 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:35:17,462 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:35:17,463 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:35:17,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:35:17,464 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:35:17,465 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:35:17,465 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:35:17,467 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:35:17,468 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:35:17,469 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-02 22:35:17,496 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:35:17,496 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:35:17,497 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:35:17,497 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:35:17,498 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:35:17,499 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:35:17,499 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:35:17,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:35:17,500 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:35:17,500 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-02 22:35:17,500 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:35:17,500 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:35:17,500 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:35:17,501 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-02 22:35:17,501 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-02 22:35:17,501 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-02 22:35:17,501 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:35:17,502 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-02 22:35:17,502 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:35:17,502 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:35:17,502 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:35:17,502 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:35:17,503 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:35:17,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:35:17,503 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:35:17,504 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:35:17,504 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:35:17,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:35:17,504 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:35:17,504 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_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 765142a1ef820c0c2cf2fa98a3978a1412f5a1196c629c20848264001100dcc9 [2021-11-02 22:35:17,850 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:35:17,875 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:35:17,878 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:35:17,879 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:35:17,882 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:35:17,883 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-1.i [2021-11-02 22:35:17,967 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/data/23497a2ef/b429e33be8c746c18e5bf98ce0f8dfb0/FLAG26add51d0 [2021-11-02 22:35:18,663 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:35:18,663 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-1.i [2021-11-02 22:35:18,690 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/data/23497a2ef/b429e33be8c746c18e5bf98ce0f8dfb0/FLAG26add51d0 [2021-11-02 22:35:18,879 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/data/23497a2ef/b429e33be8c746c18e5bf98ce0f8dfb0 [2021-11-02 22:35:18,881 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:35:18,883 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-02 22:35:18,889 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:35:18,889 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:35:18,892 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:35:18,893 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:35:18" (1/1) ... [2021-11-02 22:35:18,894 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c8614c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:35:18, skipping insertion in model container [2021-11-02 22:35:18,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:35:18" (1/1) ... [2021-11-02 22:35:18,902 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:35:18,977 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:35:19,468 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-1.i[33021,33034] [2021-11-02 22:35:19,610 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:35:19,635 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) [2021-11-02 22:35:19,636 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@796e9e4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:35:19, skipping insertion in model container [2021-11-02 22:35:19,636 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:35:19,637 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.preprocessor [2021-11-02 22:35:19,639 INFO L168 Benchmark]: Toolchain (without parser) took 755.20 ms. Allocated memory is still 102.8 MB. Free memory was 58.9 MB in the beginning and 67.8 MB in the end (delta: -8.9 MB). Peak memory consumption was 6.8 MB. Max. memory is 16.1 GB. [2021-11-02 22:35:19,640 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 102.8 MB. Free memory is still 77.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:35:19,642 INFO L168 Benchmark]: CACSL2BoogieTranslator took 747.91 ms. Allocated memory is still 102.8 MB. Free memory was 58.7 MB in the beginning and 67.8 MB in the end (delta: -9.1 MB). Peak memory consumption was 6.8 MB. Max. memory is 16.1 GB. [2021-11-02 22:35:19,644 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 102.8 MB. Free memory is still 77.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 747.91 ms. Allocated memory is still 102.8 MB. Free memory was 58.7 MB in the beginning and 67.8 MB in the end (delta: -9.1 MB). Peak memory consumption was 6.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 752]: 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_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU --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 765142a1ef820c0c2cf2fa98a3978a1412f5a1196c629c20848264001100dcc9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:35:22,093 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:35:22,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:35:22,147 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:35:22,147 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:35:22,149 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:35:22,151 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:35:22,154 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:35:22,156 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:35:22,157 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:35:22,159 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:35:22,161 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:35:22,161 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:35:22,163 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:35:22,165 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:35:22,167 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:35:22,168 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:35:22,169 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:35:22,172 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:35:22,175 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:35:22,179 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:35:22,183 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:35:22,186 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:35:22,187 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:35:22,192 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:35:22,197 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:35:22,198 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:35:22,199 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:35:22,201 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:35:22,202 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:35:22,203 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:35:22,204 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:35:22,207 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:35:22,208 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:35:22,212 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:35:22,224 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:35:22,225 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:35:22,226 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:35:22,226 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:35:22,227 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:35:22,228 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:35:22,231 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-02 22:35:22,283 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:35:22,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:35:22,284 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:35:22,285 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:35:22,287 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:35:22,287 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:35:22,288 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:35:22,288 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:35:22,288 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:35:22,288 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-02 22:35:22,290 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:35:22,290 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:35:22,290 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:35:22,291 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-02 22:35:22,291 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-02 22:35:22,291 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-02 22:35:22,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:35:22,292 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-02 22:35:22,292 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-02 22:35:22,292 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-02 22:35:22,292 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:35:22,293 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:35:22,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:35:22,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:35:22,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:35:22,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:35:22,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:35:22,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:35:22,294 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-02 22:35:22,295 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-02 22:35:22,295 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:35:22,295 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-02 22:35:22,296 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_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 765142a1ef820c0c2cf2fa98a3978a1412f5a1196c629c20848264001100dcc9 [2021-11-02 22:35:22,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:35:22,723 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:35:22,726 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:35:22,728 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:35:22,728 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:35:22,730 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-1.i [2021-11-02 22:35:22,798 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/data/7d5029166/13ff6b3f5ca7463694db1380612b9077/FLAG173d4cf9d [2021-11-02 22:35:23,521 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:35:23,521 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-1.i [2021-11-02 22:35:23,547 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/data/7d5029166/13ff6b3f5ca7463694db1380612b9077/FLAG173d4cf9d [2021-11-02 22:35:23,731 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/data/7d5029166/13ff6b3f5ca7463694db1380612b9077 [2021-11-02 22:35:23,736 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:35:23,739 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-02 22:35:23,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:35:23,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:35:23,747 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:35:23,748 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:35:23" (1/1) ... [2021-11-02 22:35:23,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49b2043e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:35:23, skipping insertion in model container [2021-11-02 22:35:23,750 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:35:23" (1/1) ... [2021-11-02 22:35:23,758 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:35:23,837 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:35:24,360 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-1.i[33021,33034] [2021-11-02 22:35:24,541 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:35:24,564 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-02 22:35:24,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:35:24,603 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-1.i[33021,33034] [2021-11-02 22:35:24,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:35:24,754 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:35:24,783 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test4-1.i[33021,33034] [2021-11-02 22:35:24,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:35:24,925 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:35:24,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:35:24 WrapperNode [2021-11-02 22:35:24,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:35:24,928 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:35:24,928 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:35:24,928 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:35:24,953 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:35:24" (1/1) ... [2021-11-02 22:35:24,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:35:24" (1/1) ... [2021-11-02 22:35:25,013 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:35:24" (1/1) ... [2021-11-02 22:35:25,013 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:35:24" (1/1) ... [2021-11-02 22:35:25,097 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:35:24" (1/1) ... [2021-11-02 22:35:25,121 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:35:24" (1/1) ... [2021-11-02 22:35:25,144 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:35:24" (1/1) ... [2021-11-02 22:35:25,160 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:35:25,161 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:35:25,162 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:35:25,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:35:25,163 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:35:24" (1/1) ... [2021-11-02 22:35:25,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:35:25,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:35:25,212 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:35:25,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:35:25,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-02 22:35:25,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:35:25,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-11-02 22:35:25,276 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-02 22:35:25,276 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-02 22:35:25,276 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-02 22:35:25,276 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-02 22:35:25,277 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-02 22:35:25,277 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-02 22:35:25,277 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-02 22:35:25,277 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2021-11-02 22:35:25,277 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-02 22:35:25,278 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-02 22:35:25,278 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2021-11-02 22:35:25,279 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2021-11-02 22:35:25,279 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2021-11-02 22:35:25,279 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2021-11-02 22:35:25,279 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-02 22:35:25,279 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2021-11-02 22:35:25,280 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2021-11-02 22:35:25,280 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-02 22:35:25,280 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2021-11-02 22:35:25,280 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2021-11-02 22:35:25,280 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2021-11-02 22:35:25,280 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-02 22:35:25,281 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2021-11-02 22:35:25,281 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2021-11-02 22:35:25,281 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2021-11-02 22:35:25,281 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2021-11-02 22:35:25,281 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2021-11-02 22:35:25,282 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2021-11-02 22:35:25,282 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2021-11-02 22:35:25,282 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-11-02 22:35:25,282 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2021-11-02 22:35:25,282 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2021-11-02 22:35:25,282 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2021-11-02 22:35:25,283 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2021-11-02 22:35:25,284 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2021-11-02 22:35:25,284 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2021-11-02 22:35:25,284 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2021-11-02 22:35:25,285 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2021-11-02 22:35:25,285 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2021-11-02 22:35:25,285 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2021-11-02 22:35:25,285 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2021-11-02 22:35:25,286 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2021-11-02 22:35:25,286 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2021-11-02 22:35:25,286 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2021-11-02 22:35:25,286 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2021-11-02 22:35:25,287 INFO L130 BoogieDeclarations]: Found specification of procedure index [2021-11-02 22:35:25,287 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2021-11-02 22:35:25,287 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2021-11-02 22:35:25,287 INFO L130 BoogieDeclarations]: Found specification of procedure ffsl [2021-11-02 22:35:25,287 INFO L130 BoogieDeclarations]: Found specification of procedure ffsll [2021-11-02 22:35:25,287 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2021-11-02 22:35:25,288 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2021-11-02 22:35:25,288 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp_l [2021-11-02 22:35:25,288 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp_l [2021-11-02 22:35:25,289 INFO L130 BoogieDeclarations]: Found specification of procedure explicit_bzero [2021-11-02 22:35:25,289 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2021-11-02 22:35:25,290 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2021-11-02 22:35:25,290 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2021-11-02 22:35:25,291 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2021-11-02 22:35:25,292 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2021-11-02 22:35:25,292 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2021-11-02 22:35:25,293 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-02 22:35:25,293 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-02 22:35:25,293 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-02 22:35:25,293 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-02 22:35:25,293 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-02 22:35:25,293 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-02 22:35:25,294 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-02 22:35:25,294 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-02 22:35:25,294 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-02 22:35:25,294 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-02 22:35:25,294 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-02 22:35:25,294 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-02 22:35:25,295 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-02 22:35:25,296 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-02 22:35:25,296 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-02 22:35:25,296 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-02 22:35:25,296 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-02 22:35:25,297 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-02 22:35:25,297 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-02 22:35:25,297 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-02 22:35:25,297 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-02 22:35:25,297 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-02 22:35:25,297 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-02 22:35:25,298 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-02 22:35:25,298 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-02 22:35:25,298 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-02 22:35:25,298 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-02 22:35:25,298 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-02 22:35:25,298 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-02 22:35:25,299 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-02 22:35:25,299 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-02 22:35:25,299 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-02 22:35:25,299 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-02 22:35:25,300 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-02 22:35:25,300 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-02 22:35:25,300 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-02 22:35:25,300 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-02 22:35:25,300 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-02 22:35:25,300 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-02 22:35:25,300 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-02 22:35:25,301 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-02 22:35:25,301 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-02 22:35:25,301 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-02 22:35:25,301 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-02 22:35:25,301 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-02 22:35:25,301 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-02 22:35:25,302 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-02 22:35:25,302 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-02 22:35:25,302 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-02 22:35:25,302 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-02 22:35:25,302 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-02 22:35:25,302 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-02 22:35:25,303 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-02 22:35:25,303 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-02 22:35:25,303 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-02 22:35:25,304 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-02 22:35:25,305 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-02 22:35:25,308 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-02 22:35:25,308 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-02 22:35:25,308 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-02 22:35:25,310 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-02 22:35:25,310 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-02 22:35:25,311 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-02 22:35:25,311 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-02 22:35:25,311 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-02 22:35:25,312 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-02 22:35:25,318 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-02 22:35:25,318 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-02 22:35:25,318 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-02 22:35:25,318 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-02 22:35:25,318 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-02 22:35:25,319 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-02 22:35:25,319 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-02 22:35:25,319 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-02 22:35:25,319 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-02 22:35:25,319 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-02 22:35:25,319 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-02 22:35:25,319 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-02 22:35:25,320 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-02 22:35:25,320 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-02 22:35:25,320 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-02 22:35:25,320 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-02 22:35:25,320 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-02 22:35:25,320 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-02 22:35:25,320 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-02 22:35:25,321 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-02 22:35:25,321 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-02 22:35:25,321 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-02 22:35:25,321 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-02 22:35:25,321 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-02 22:35:25,321 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-02 22:35:25,321 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-02 22:35:25,321 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-02 22:35:25,322 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-02 22:35:25,322 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-02 22:35:25,322 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-02 22:35:25,322 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-02 22:35:25,322 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-02 22:35:25,322 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-02 22:35:25,322 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-02 22:35:25,323 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-02 22:35:25,323 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-02 22:35:25,323 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-02 22:35:25,323 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-02 22:35:25,323 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-02 22:35:25,323 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-02 22:35:25,323 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-02 22:35:25,324 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-02 22:35:25,324 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-02 22:35:25,324 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-02 22:35:25,324 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-02 22:35:25,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:35:25,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-02 22:35:25,325 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2021-11-02 22:35:25,325 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-02 22:35:25,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 22:35:25,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-02 22:35:25,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-02 22:35:25,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 22:35:25,326 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 22:35:25,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-02 22:35:25,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:35:25,326 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-02 22:35:25,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-02 22:35:25,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-02 22:35:25,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:35:25,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-11-02 22:35:25,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-02 22:35:26,023 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-02 22:35:31,739 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:35:31,739 INFO L299 CfgBuilder]: Removed 60 assume(true) statements. [2021-11-02 22:35:31,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:35:31 BoogieIcfgContainer [2021-11-02 22:35:31,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:35:31,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:35:31,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:35:31,758 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:35:31,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:35:23" (1/3) ... [2021-11-02 22:35:31,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72590ef8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:35:31, skipping insertion in model container [2021-11-02 22:35:31,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:35:24" (2/3) ... [2021-11-02 22:35:31,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72590ef8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:35:31, skipping insertion in model container [2021-11-02 22:35:31,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:35:31" (3/3) ... [2021-11-02 22:35:31,764 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test4-1.i [2021-11-02 22:35:31,776 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:35:31,777 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 648 error locations. [2021-11-02 22:35:31,836 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:35:31,845 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 [2021-11-02 22:35:31,846 INFO L340 AbstractCegarLoop]: Starting to check reachability of 648 error locations. [2021-11-02 22:35:31,908 INFO L276 IsEmpty]: Start isEmpty. Operand has 1282 states, 615 states have (on average 2.2536585365853656) internal successors, (1386), 1267 states have internal predecessors, (1386), 19 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (19), 10 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-02 22:35:31,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-02 22:35:31,916 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:35:31,916 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:35:31,917 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 644 more)] === [2021-11-02 22:35:31,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:35:31,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1382358025, now seen corresponding path program 1 times [2021-11-02 22:35:31,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:35:31,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [847209153] [2021-11-02 22:35:31,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:31,937 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:35:31,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:35:31,941 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:35:31,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-02 22:35:32,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:32,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-02 22:35:32,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:35:32,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:35:32,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:35:32,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:35:32,353 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:35:32,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [847209153] [2021-11-02 22:35:32,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [847209153] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:35:32,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:35:32,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-02 22:35:32,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634530320] [2021-11-02 22:35:32,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 22:35:32,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:35:32,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 22:35:32,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:35:32,383 INFO L87 Difference]: Start difference. First operand has 1282 states, 615 states have (on average 2.2536585365853656) internal successors, (1386), 1267 states have internal predecessors, (1386), 19 states have call successors, (19), 5 states have call predecessors, (19), 5 states have return successors, (19), 10 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:35:32,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:35:32,508 INFO L93 Difference]: Finished difference Result 1264 states and 1338 transitions. [2021-11-02 22:35:32,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 22:35:32,510 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-11-02 22:35:32,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:35:32,544 INFO L225 Difference]: With dead ends: 1264 [2021-11-02 22:35:32,544 INFO L226 Difference]: Without dead ends: 1261 [2021-11-02 22:35:32,546 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:35:32,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2021-11-02 22:35:32,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 1261. [2021-11-02 22:35:32,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 606 states have (on average 2.1419141914191417) internal successors, (1298), 1247 states have internal predecessors, (1298), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (18), 9 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-02 22:35:32,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 1335 transitions. [2021-11-02 22:35:32,682 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 1335 transitions. Word has length 9 [2021-11-02 22:35:32,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:35:32,682 INFO L470 AbstractCegarLoop]: Abstraction has 1261 states and 1335 transitions. [2021-11-02 22:35:32,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:35:32,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 1335 transitions. [2021-11-02 22:35:32,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-02 22:35:32,684 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:35:32,684 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:35:32,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:35:32,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:35:32,896 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 644 more)] === [2021-11-02 22:35:32,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:35:32,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1382357963, now seen corresponding path program 1 times [2021-11-02 22:35:32,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:35:32,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [920148386] [2021-11-02 22:35:32,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:32,898 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:35:32,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:35:32,901 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:35:32,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-02 22:35:33,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:33,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:35:33,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:35:33,190 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 [2021-11-02 22:35:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:35:33,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:35:33,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:35:33,255 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:35:33,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [920148386] [2021-11-02 22:35:33,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [920148386] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:35:33,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:35:33,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-02 22:35:33,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309235929] [2021-11-02 22:35:33,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:35:33,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:35:33,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:35:33,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:35:33,261 INFO L87 Difference]: Start difference. First operand 1261 states and 1335 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:35:36,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:35:36,212 INFO L93 Difference]: Finished difference Result 1298 states and 1385 transitions. [2021-11-02 22:35:36,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:35:36,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 9 [2021-11-02 22:35:36,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:35:36,221 INFO L225 Difference]: With dead ends: 1298 [2021-11-02 22:35:36,221 INFO L226 Difference]: Without dead ends: 1298 [2021-11-02 22:35:36,222 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:35:36,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2021-11-02 22:35:36,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 1244. [2021-11-02 22:35:36,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 682 states have (on average 1.964809384164223) internal successors, (1340), 1230 states have internal predecessors, (1340), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (18), 9 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-02 22:35:36,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 1377 transitions. [2021-11-02 22:35:36,270 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 1377 transitions. Word has length 9 [2021-11-02 22:35:36,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:35:36,270 INFO L470 AbstractCegarLoop]: Abstraction has 1244 states and 1377 transitions. [2021-11-02 22:35:36,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-11-02 22:35:36,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 1377 transitions. [2021-11-02 22:35:36,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-02 22:35:36,271 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:35:36,272 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:35:36,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:35:36,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:35:36,484 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 644 more)] === [2021-11-02 22:35:36,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:35:36,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1382357962, now seen corresponding path program 1 times [2021-11-02 22:35:36,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:35:36,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1425198083] [2021-11-02 22:35:36,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:36,486 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:35:36,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:35:36,487 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:35:36,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-02 22:35:36,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:36,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:35:36,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:35:36,767 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 [2021-11-02 22:35:36,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:35:36,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:35:36,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:35:36,877 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:35:36,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1425198083] [2021-11-02 22:35:36,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1425198083] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:35:36,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:35:36,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-02 22:35:36,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412571529] [2021-11-02 22:35:36,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:35:36,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:35:36,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:35:36,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:35:36,879 INFO L87 Difference]: Start difference. First operand 1244 states and 1377 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (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) [2021-11-02 22:35:43,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:35:43,236 INFO L93 Difference]: Finished difference Result 1598 states and 1752 transitions. [2021-11-02 22:35:43,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:35:43,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (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 9 [2021-11-02 22:35:43,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:35:43,249 INFO L225 Difference]: With dead ends: 1598 [2021-11-02 22:35:43,250 INFO L226 Difference]: Without dead ends: 1598 [2021-11-02 22:35:43,250 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:35:43,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1598 states. [2021-11-02 22:35:43,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1598 to 1400. [2021-11-02 22:35:43,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 848 states have (on average 1.9410377358490567) internal successors, (1646), 1386 states have internal predecessors, (1646), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (18), 9 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-02 22:35:43,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 1683 transitions. [2021-11-02 22:35:43,305 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 1683 transitions. Word has length 9 [2021-11-02 22:35:43,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:35:43,306 INFO L470 AbstractCegarLoop]: Abstraction has 1400 states and 1683 transitions. [2021-11-02 22:35:43,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (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) [2021-11-02 22:35:43,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 1683 transitions. [2021-11-02 22:35:43,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-02 22:35:43,307 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:35:43,307 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:35:43,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:35:43,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:35:43,544 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr640REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 644 more)] === [2021-11-02 22:35:43,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:35:43,546 INFO L85 PathProgramCache]: Analyzing trace with hash 98263510, now seen corresponding path program 1 times [2021-11-02 22:35:43,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:35:43,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [494719325] [2021-11-02 22:35:43,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:43,548 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:35:43,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:35:43,549 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:35:43,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-02 22:35:43,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:43,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:35:43,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:35:43,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:35:43,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:35:43,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:35:43,846 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:35:43,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [494719325] [2021-11-02 22:35:43,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [494719325] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:35:43,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:35:43,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-02 22:35:43,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125643721] [2021-11-02 22:35:43,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:35:43,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:35:43,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:35:43,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:35:43,853 INFO L87 Difference]: Start difference. First operand 1400 states and 1683 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:35:44,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:35:44,014 INFO L93 Difference]: Finished difference Result 2745 states and 3291 transitions. [2021-11-02 22:35:44,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:35:44,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-02 22:35:44,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:35:44,031 INFO L225 Difference]: With dead ends: 2745 [2021-11-02 22:35:44,031 INFO L226 Difference]: Without dead ends: 2745 [2021-11-02 22:35:44,032 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:35:44,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2021-11-02 22:35:44,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 2216. [2021-11-02 22:35:44,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2216 states, 1664 states have (on average 1.9483173076923077) internal successors, (3242), 2196 states have internal predecessors, (3242), 25 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 15 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-02 22:35:44,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2216 states to 2216 states and 3291 transitions. [2021-11-02 22:35:44,107 INFO L78 Accepts]: Start accepts. Automaton has 2216 states and 3291 transitions. Word has length 10 [2021-11-02 22:35:44,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:35:44,107 INFO L470 AbstractCegarLoop]: Abstraction has 2216 states and 3291 transitions. [2021-11-02 22:35:44,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:35:44,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2216 states and 3291 transitions. [2021-11-02 22:35:44,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-02 22:35:44,108 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:35:44,108 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:35:44,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-02 22:35:44,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:35:44,330 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr4REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 644 more)] === [2021-11-02 22:35:44,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:35:44,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1364426047, now seen corresponding path program 1 times [2021-11-02 22:35:44,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:35:44,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [539013667] [2021-11-02 22:35:44,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:44,332 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:35:44,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:35:44,333 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:35:44,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-02 22:35:44,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:44,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:35:44,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:35:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:35:44,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:35:44,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:35:44,696 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:35:44,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [539013667] [2021-11-02 22:35:44,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [539013667] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:35:44,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:35:44,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-02 22:35:44,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125978159] [2021-11-02 22:35:44,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:35:44,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:35:44,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:35:44,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:35:44,698 INFO L87 Difference]: Start difference. First operand 2216 states and 3291 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:35:44,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:35:44,761 INFO L93 Difference]: Finished difference Result 2156 states and 3205 transitions. [2021-11-02 22:35:44,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:35:44,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-02 22:35:44,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:35:44,778 INFO L225 Difference]: With dead ends: 2156 [2021-11-02 22:35:44,778 INFO L226 Difference]: Without dead ends: 2156 [2021-11-02 22:35:44,779 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:35:44,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2021-11-02 22:35:44,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 2156. [2021-11-02 22:35:44,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 1628 states have (on average 1.9385749385749387) internal successors, (3156), 2136 states have internal predecessors, (3156), 25 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 15 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-02 22:35:44,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 3205 transitions. [2021-11-02 22:35:44,848 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 3205 transitions. Word has length 15 [2021-11-02 22:35:44,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:35:44,849 INFO L470 AbstractCegarLoop]: Abstraction has 2156 states and 3205 transitions. [2021-11-02 22:35:44,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:35:44,849 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 3205 transitions. [2021-11-02 22:35:44,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 22:35:44,850 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:35:44,851 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:35:44,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:35:45,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:35:45,067 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr28REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 644 more)] === [2021-11-02 22:35:45,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:35:45,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1248405209, now seen corresponding path program 1 times [2021-11-02 22:35:45,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:35:45,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [902859455] [2021-11-02 22:35:45,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:45,069 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:35:45,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:35:45,071 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:35:45,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-02 22:35:45,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:45,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:35:45,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:35:45,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:35:45,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:35:45,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:35:45,500 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:35:45,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [902859455] [2021-11-02 22:35:45,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [902859455] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:35:45,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:35:45,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-02 22:35:45,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964157259] [2021-11-02 22:35:45,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:35:45,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:35:45,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:35:45,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:35:45,502 INFO L87 Difference]: Start difference. First operand 2156 states and 3205 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:35:45,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:35:45,624 INFO L93 Difference]: Finished difference Result 2128 states and 3149 transitions. [2021-11-02 22:35:45,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:35:45,624 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-02 22:35:45,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:35:45,641 INFO L225 Difference]: With dead ends: 2128 [2021-11-02 22:35:45,641 INFO L226 Difference]: Without dead ends: 2128 [2021-11-02 22:35:45,642 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:35:45,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2128 states. [2021-11-02 22:35:45,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2128 to 2126. [2021-11-02 22:35:45,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 1612 states have (on average 1.9218362282878412) internal successors, (3098), 2106 states have internal predecessors, (3098), 25 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 15 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-02 22:35:45,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 3147 transitions. [2021-11-02 22:35:45,749 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 3147 transitions. Word has length 17 [2021-11-02 22:35:45,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:35:45,749 INFO L470 AbstractCegarLoop]: Abstraction has 2126 states and 3147 transitions. [2021-11-02 22:35:45,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:35:45,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 3147 transitions. [2021-11-02 22:35:45,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-02 22:35:45,752 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:35:45,753 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:35:45,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:35:45,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:35:45,967 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr42REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 644 more)] === [2021-11-02 22:35:45,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:35:45,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1848711161, now seen corresponding path program 1 times [2021-11-02 22:35:45,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:35:45,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1721401389] [2021-11-02 22:35:45,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:45,968 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:35:45,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:35:45,971 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:35:45,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-02 22:35:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:46,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:35:46,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:35:46,246 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 [2021-11-02 22:35:46,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:35:46,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:35:46,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:35:46,496 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:35:46,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1721401389] [2021-11-02 22:35:46,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1721401389] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:35:46,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:35:46,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-02 22:35:46,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172242005] [2021-11-02 22:35:46,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:35:46,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:35:46,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:35:46,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:35:46,499 INFO L87 Difference]: Start difference. First operand 2126 states and 3147 transitions. Second operand has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:35:50,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:35:50,322 INFO L93 Difference]: Finished difference Result 2754 states and 3940 transitions. [2021-11-02 22:35:50,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:35:50,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-11-02 22:35:50,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:35:50,340 INFO L225 Difference]: With dead ends: 2754 [2021-11-02 22:35:50,340 INFO L226 Difference]: Without dead ends: 2754 [2021-11-02 22:35:50,340 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:35:50,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2754 states. [2021-11-02 22:35:50,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2754 to 2122. [2021-11-02 22:35:50,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2122 states, 1612 states have (on average 1.9168734491315136) internal successors, (3090), 2102 states have internal predecessors, (3090), 25 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 15 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-02 22:35:50,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2122 states to 2122 states and 3139 transitions. [2021-11-02 22:35:50,409 INFO L78 Accepts]: Start accepts. Automaton has 2122 states and 3139 transitions. Word has length 31 [2021-11-02 22:35:50,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:35:50,409 INFO L470 AbstractCegarLoop]: Abstraction has 2122 states and 3139 transitions. [2021-11-02 22:35:50,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:35:50,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2122 states and 3139 transitions. [2021-11-02 22:35:50,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-02 22:35:50,411 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:35:50,411 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:35:50,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-02 22:35:50,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:35:50,625 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr43REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 644 more)] === [2021-11-02 22:35:50,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:35:50,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1848711160, now seen corresponding path program 1 times [2021-11-02 22:35:50,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:35:50,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1104932142] [2021-11-02 22:35:50,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:50,628 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:35:50,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:35:50,629 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:35:50,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-02 22:35:50,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:50,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:35:50,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:35:50,911 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 [2021-11-02 22:35:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:35:51,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:35:51,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:35:51,658 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:35:51,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1104932142] [2021-11-02 22:35:51,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1104932142] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:35:51,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:35:51,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-02 22:35:51,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600009949] [2021-11-02 22:35:51,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:35:51,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:35:51,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:35:51,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:35:51,660 INFO L87 Difference]: Start difference. First operand 2122 states and 3139 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 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) [2021-11-02 22:36:00,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:36:00,592 INFO L93 Difference]: Finished difference Result 2375 states and 3288 transitions. [2021-11-02 22:36:00,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:36:00,593 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-11-02 22:36:00,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:36:00,617 INFO L225 Difference]: With dead ends: 2375 [2021-11-02 22:36:00,617 INFO L226 Difference]: Without dead ends: 2375 [2021-11-02 22:36:00,618 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:36:00,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2375 states. [2021-11-02 22:36:00,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2375 to 2118. [2021-11-02 22:36:00,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2118 states, 1612 states have (on average 1.911910669975186) internal successors, (3082), 2098 states have internal predecessors, (3082), 25 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 15 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-02 22:36:00,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2118 states to 2118 states and 3131 transitions. [2021-11-02 22:36:00,682 INFO L78 Accepts]: Start accepts. Automaton has 2118 states and 3131 transitions. Word has length 31 [2021-11-02 22:36:00,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:36:00,686 INFO L470 AbstractCegarLoop]: Abstraction has 2118 states and 3131 transitions. [2021-11-02 22:36:00,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 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) [2021-11-02 22:36:00,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2118 states and 3131 transitions. [2021-11-02 22:36:00,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-02 22:36:00,701 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:36:00,702 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:36:00,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:00,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:36:00,915 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr107REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 644 more)] === [2021-11-02 22:36:00,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:00,915 INFO L85 PathProgramCache]: Analyzing trace with hash -189672101, now seen corresponding path program 1 times [2021-11-02 22:36:00,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:36:00,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1902580307] [2021-11-02 22:36:00,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:36:00,917 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:36:00,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:36:00,918 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:36:00,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-02 22:36:01,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:01,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:36:01,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:01,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:36:01,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:36:01,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:36:01,546 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:36:01,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1902580307] [2021-11-02 22:36:01,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1902580307] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:36:01,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:36:01,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-02 22:36:01,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018496209] [2021-11-02 22:36:01,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:36:01,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:36:01,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:36:01,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:36:01,549 INFO L87 Difference]: Start difference. First operand 2118 states and 3131 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2021-11-02 22:36:01,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:36:01,624 INFO L93 Difference]: Finished difference Result 2106 states and 3111 transitions. [2021-11-02 22:36:01,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:36:01,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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 46 [2021-11-02 22:36:01,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:36:01,640 INFO L225 Difference]: With dead ends: 2106 [2021-11-02 22:36:01,640 INFO L226 Difference]: Without dead ends: 2106 [2021-11-02 22:36:01,640 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:36:01,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2021-11-02 22:36:01,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2106. [2021-11-02 22:36:01,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2106 states, 1600 states have (on average 1.91375) internal successors, (3062), 2086 states have internal predecessors, (3062), 25 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 15 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-02 22:36:01,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 3111 transitions. [2021-11-02 22:36:01,698 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 3111 transitions. Word has length 46 [2021-11-02 22:36:01,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:36:01,699 INFO L470 AbstractCegarLoop]: Abstraction has 2106 states and 3111 transitions. [2021-11-02 22:36:01,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2021-11-02 22:36:01,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 3111 transitions. [2021-11-02 22:36:01,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-02 22:36:01,706 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:36:01,706 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:36:01,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:01,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:36:01,920 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr107REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 644 more)] === [2021-11-02 22:36:01,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:01,921 INFO L85 PathProgramCache]: Analyzing trace with hash 568275343, now seen corresponding path program 1 times [2021-11-02 22:36:01,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:36:01,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1248947443] [2021-11-02 22:36:01,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:36:01,922 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:36:01,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:36:01,923 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:36:01,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-02 22:36:02,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:02,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:36:02,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:02,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:36:02,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:36:03,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:36:03,217 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:36:03,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1248947443] [2021-11-02 22:36:03,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1248947443] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:36:03,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:36:03,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-02 22:36:03,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116726785] [2021-11-02 22:36:03,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:36:03,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:36:03,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:36:03,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:36:03,219 INFO L87 Difference]: Start difference. First operand 2106 states and 3111 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2021-11-02 22:36:03,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:36:03,324 INFO L93 Difference]: Finished difference Result 1922 states and 2756 transitions. [2021-11-02 22:36:03,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:36:03,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 54 [2021-11-02 22:36:03,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:36:03,337 INFO L225 Difference]: With dead ends: 1922 [2021-11-02 22:36:03,338 INFO L226 Difference]: Without dead ends: 1922 [2021-11-02 22:36:03,338 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:36:03,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2021-11-02 22:36:03,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 1922. [2021-11-02 22:36:03,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1922 states, 1416 states have (on average 1.911723163841808) internal successors, (2707), 1902 states have internal predecessors, (2707), 25 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 15 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-02 22:36:03,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1922 states to 1922 states and 2756 transitions. [2021-11-02 22:36:03,386 INFO L78 Accepts]: Start accepts. Automaton has 1922 states and 2756 transitions. Word has length 54 [2021-11-02 22:36:03,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:36:03,388 INFO L470 AbstractCegarLoop]: Abstraction has 1922 states and 2756 transitions. [2021-11-02 22:36:03,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2021-11-02 22:36:03,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1922 states and 2756 transitions. [2021-11-02 22:36:03,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-02 22:36:03,390 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:36:03,391 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:36:03,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:03,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:36:03,607 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr61REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 644 more)] === [2021-11-02 22:36:03,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:03,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1377713038, now seen corresponding path program 1 times [2021-11-02 22:36:03,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:36:03,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2113484408] [2021-11-02 22:36:03,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:36:03,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:36:03,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:36:03,610 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:36:03,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-02 22:36:04,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:04,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 22:36:04,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:04,175 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 [2021-11-02 22:36:04,184 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 [2021-11-02 22:36:04,969 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 22:36:04,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-11-02 22:36:04,976 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 22:36:04,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-11-02 22:36:05,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:36:05,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:36:09,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:36:09,813 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:36:09,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2113484408] [2021-11-02 22:36:09,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2113484408] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:36:09,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:36:09,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-02 22:36:09,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69674264] [2021-11-02 22:36:09,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:36:09,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:36:09,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:36:09,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-02 22:36:09,815 INFO L87 Difference]: Start difference. First operand 1922 states and 2756 transitions. Second operand has 6 states, 5 states have (on average 21.0) internal successors, (105), 6 states have internal predecessors, (105), 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) [2021-11-02 22:36:28,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:36:28,396 INFO L93 Difference]: Finished difference Result 2570 states and 3536 transitions. [2021-11-02 22:36:28,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:36:28,397 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 21.0) internal successors, (105), 6 states have internal predecessors, (105), 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 57 [2021-11-02 22:36:28,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:36:28,410 INFO L225 Difference]: With dead ends: 2570 [2021-11-02 22:36:28,410 INFO L226 Difference]: Without dead ends: 2570 [2021-11-02 22:36:28,410 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=26, Invalid=28, Unknown=2, NotChecked=0, Total=56 [2021-11-02 22:36:28,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2021-11-02 22:36:28,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 2062. [2021-11-02 22:36:28,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 1594 states have (on average 1.858845671267252) internal successors, (2963), 2036 states have internal predecessors, (2963), 31 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (30), 21 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-02 22:36:28,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 3024 transitions. [2021-11-02 22:36:28,465 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 3024 transitions. Word has length 57 [2021-11-02 22:36:28,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:36:28,466 INFO L470 AbstractCegarLoop]: Abstraction has 2062 states and 3024 transitions. [2021-11-02 22:36:28,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 21.0) internal successors, (105), 6 states have internal predecessors, (105), 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) [2021-11-02 22:36:28,466 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 3024 transitions. [2021-11-02 22:36:28,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-02 22:36:28,467 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:36:28,467 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:36:28,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:28,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:36:28,683 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr66REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 644 more)] === [2021-11-02 22:36:28,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:28,684 INFO L85 PathProgramCache]: Analyzing trace with hash 569746658, now seen corresponding path program 1 times [2021-11-02 22:36:28,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:36:28,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [576833603] [2021-11-02 22:36:28,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:36:28,685 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:36:28,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:36:28,688 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:36:28,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-02 22:36:29,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:29,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:36:29,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:29,434 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 [2021-11-02 22:36:29,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-02 22:36:29,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-02 22:36:29,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:36:29,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:36:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:36:29,662 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:36:29,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [576833603] [2021-11-02 22:36:29,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [576833603] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:36:29,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:36:29,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-02 22:36:29,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638342646] [2021-11-02 22:36:29,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:36:29,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:36:29,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:36:29,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:36:29,664 INFO L87 Difference]: Start difference. First operand 2062 states and 3024 transitions. Second operand has 5 states, 4 states have (on average 14.75) internal successors, (59), 5 states have internal predecessors, (59), 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) [2021-11-02 22:36:33,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:36:33,666 INFO L93 Difference]: Finished difference Result 2061 states and 3022 transitions. [2021-11-02 22:36:33,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:36:33,667 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 5 states have internal predecessors, (59), 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 62 [2021-11-02 22:36:33,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:36:33,678 INFO L225 Difference]: With dead ends: 2061 [2021-11-02 22:36:33,678 INFO L226 Difference]: Without dead ends: 2061 [2021-11-02 22:36:33,679 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 117 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:36:33,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2021-11-02 22:36:33,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 2061. [2021-11-02 22:36:33,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 1594 states have (on average 1.857590966122961) internal successors, (2961), 2035 states have internal predecessors, (2961), 31 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (30), 21 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-02 22:36:33,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 3022 transitions. [2021-11-02 22:36:33,724 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 3022 transitions. Word has length 62 [2021-11-02 22:36:33,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:36:33,724 INFO L470 AbstractCegarLoop]: Abstraction has 2061 states and 3022 transitions. [2021-11-02 22:36:33,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 5 states have internal predecessors, (59), 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) [2021-11-02 22:36:33,725 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 3022 transitions. [2021-11-02 22:36:33,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-02 22:36:33,725 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:36:33,726 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:36:33,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:33,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:36:33,940 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr67REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 644 more)] === [2021-11-02 22:36:33,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:33,940 INFO L85 PathProgramCache]: Analyzing trace with hash 569746659, now seen corresponding path program 1 times [2021-11-02 22:36:33,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:36:33,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [452142731] [2021-11-02 22:36:33,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:36:33,942 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:36:33,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:36:33,943 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:36:33,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-02 22:36:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:34,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:36:34,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:34,567 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 [2021-11-02 22:36:34,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:36:34,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-02 22:36:34,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-02 22:36:34,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-02 22:36:34,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:36:34,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:36:35,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:36:35,052 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:36:35,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [452142731] [2021-11-02 22:36:35,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [452142731] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:36:35,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:36:35,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-02 22:36:35,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855871882] [2021-11-02 22:36:35,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:36:35,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:36:35,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:36:35,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:36:35,054 INFO L87 Difference]: Start difference. First operand 2061 states and 3022 transitions. Second operand has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 8 states have internal predecessors, (66), 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) [2021-11-02 22:36:46,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:36:46,736 INFO L93 Difference]: Finished difference Result 2060 states and 3020 transitions. [2021-11-02 22:36:46,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:36:46,738 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 8 states have internal predecessors, (66), 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 62 [2021-11-02 22:36:46,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:36:46,746 INFO L225 Difference]: With dead ends: 2060 [2021-11-02 22:36:46,746 INFO L226 Difference]: Without dead ends: 2060 [2021-11-02 22:36:46,746 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:36:46,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2021-11-02 22:36:46,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 2060. [2021-11-02 22:36:46,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2060 states, 1592 states have (on average 1.8586683417085428) internal successors, (2959), 2034 states have internal predecessors, (2959), 31 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (30), 21 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-02 22:36:46,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 3020 transitions. [2021-11-02 22:36:46,788 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 3020 transitions. Word has length 62 [2021-11-02 22:36:46,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:36:46,789 INFO L470 AbstractCegarLoop]: Abstraction has 2060 states and 3020 transitions. [2021-11-02 22:36:46,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 8 states have internal predecessors, (66), 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) [2021-11-02 22:36:46,789 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 3020 transitions. [2021-11-02 22:36:46,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-02 22:36:46,790 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:36:46,790 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:36:46,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:47,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:36:47,005 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr70REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 644 more)] === [2021-11-02 22:36:47,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:47,005 INFO L85 PathProgramCache]: Analyzing trace with hash -2036280663, now seen corresponding path program 1 times [2021-11-02 22:36:47,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:36:47,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [386766223] [2021-11-02 22:36:47,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:36:47,006 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:36:47,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:36:47,007 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:36:47,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-02 22:36:47,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:47,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:36:47,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:47,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:36:47,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:36:47,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:36:47,920 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:36:47,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [386766223] [2021-11-02 22:36:47,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [386766223] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:36:47,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:36:47,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-02 22:36:47,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493295994] [2021-11-02 22:36:47,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:36:47,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:36:47,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:36:47,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:36:47,922 INFO L87 Difference]: Start difference. First operand 2060 states and 3020 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:36:48,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:36:48,094 INFO L93 Difference]: Finished difference Result 2070 states and 3038 transitions. [2021-11-02 22:36:48,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:36:48,095 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 70 [2021-11-02 22:36:48,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:36:48,104 INFO L225 Difference]: With dead ends: 2070 [2021-11-02 22:36:48,105 INFO L226 Difference]: Without dead ends: 2070 [2021-11-02 22:36:48,105 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:36:48,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2070 states. [2021-11-02 22:36:48,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2070 to 2070. [2021-11-02 22:36:48,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2070 states, 1600 states have (on average 1.856875) internal successors, (2971), 2043 states have internal predecessors, (2971), 31 states have call successors, (31), 6 states have call predecessors, (31), 6 states have return successors, (36), 21 states have call predecessors, (36), 30 states have call successors, (36) [2021-11-02 22:36:48,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 3038 transitions. [2021-11-02 22:36:48,174 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 3038 transitions. Word has length 70 [2021-11-02 22:36:48,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:36:48,174 INFO L470 AbstractCegarLoop]: Abstraction has 2070 states and 3038 transitions. [2021-11-02 22:36:48,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:36:48,175 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 3038 transitions. [2021-11-02 22:36:48,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-02 22:36:48,176 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:36:48,176 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:36:48,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:48,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:36:48,392 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr70REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 644 more)] === [2021-11-02 22:36:48,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:48,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1343773079, now seen corresponding path program 1 times [2021-11-02 22:36:48,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:36:48,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2120485932] [2021-11-02 22:36:48,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:36:48,394 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:36:48,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:36:48,395 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:36:48,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-02 22:36:49,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:49,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:36:49,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:49,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:36:49,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:36:49,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:36:49,600 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:36:49,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2120485932] [2021-11-02 22:36:49,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2120485932] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:36:49,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:36:49,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-02 22:36:49,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761940357] [2021-11-02 22:36:49,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:36:49,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:36:49,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:36:49,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:36:49,602 INFO L87 Difference]: Start difference. First operand 2070 states and 3038 transitions. Second operand has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 states have internal predecessors, (72), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:36:50,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:36:50,292 INFO L93 Difference]: Finished difference Result 2084 states and 3066 transitions. [2021-11-02 22:36:50,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 22:36:50,294 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 states have internal predecessors, (72), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 72 [2021-11-02 22:36:50,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:36:50,300 INFO L225 Difference]: With dead ends: 2084 [2021-11-02 22:36:50,300 INFO L226 Difference]: Without dead ends: 2080 [2021-11-02 22:36:50,301 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:36:50,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2021-11-02 22:36:50,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 2076. [2021-11-02 22:36:50,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2076 states, 1606 states have (on average 1.8549190535491906) internal successors, (2979), 2049 states have internal predecessors, (2979), 31 states have call successors, (31), 6 states have call predecessors, (31), 6 states have return successors, (36), 21 states have call predecessors, (36), 30 states have call successors, (36) [2021-11-02 22:36:50,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 3046 transitions. [2021-11-02 22:36:50,348 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 3046 transitions. Word has length 72 [2021-11-02 22:36:50,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:36:50,349 INFO L470 AbstractCegarLoop]: Abstraction has 2076 states and 3046 transitions. [2021-11-02 22:36:50,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 states have internal predecessors, (72), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:36:50,350 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 3046 transitions. [2021-11-02 22:36:50,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-02 22:36:50,350 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:36:50,350 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:36:50,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:50,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:36:50,567 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr70REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 644 more)] === [2021-11-02 22:36:50,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:50,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1627356649, now seen corresponding path program 2 times [2021-11-02 22:36:50,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:36:50,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1390397565] [2021-11-02 22:36:50,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:36:50,569 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:36:50,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:36:50,570 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:36:50,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-02 22:36:51,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:36:51,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:36:51,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:36:51,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:51,620 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:36:51,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:36:52,173 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:36:52,174 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:36:52,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1390397565] [2021-11-02 22:36:52,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1390397565] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:36:52,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:36:52,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-11-02 22:36:52,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004354965] [2021-11-02 22:36:52,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 22:36:52,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:36:52,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 22:36:52,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:36:52,175 INFO L87 Difference]: Start difference. First operand 2076 states and 3046 transitions. Second operand has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:36:54,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:36:54,044 INFO L93 Difference]: Finished difference Result 2104 states and 3114 transitions. [2021-11-02 22:36:54,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 22:36:54,045 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 76 [2021-11-02 22:36:54,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:36:54,051 INFO L225 Difference]: With dead ends: 2104 [2021-11-02 22:36:54,051 INFO L226 Difference]: Without dead ends: 2100 [2021-11-02 22:36:54,052 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=457, Invalid=949, Unknown=0, NotChecked=0, Total=1406 [2021-11-02 22:36:54,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2021-11-02 22:36:54,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 2088. [2021-11-02 22:36:54,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2088 states, 1618 states have (on average 1.8510506798516688) internal successors, (2995), 2061 states have internal predecessors, (2995), 31 states have call successors, (31), 6 states have call predecessors, (31), 6 states have return successors, (36), 21 states have call predecessors, (36), 30 states have call successors, (36) [2021-11-02 22:36:54,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3062 transitions. [2021-11-02 22:36:54,094 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3062 transitions. Word has length 76 [2021-11-02 22:36:54,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:36:54,095 INFO L470 AbstractCegarLoop]: Abstraction has 2088 states and 3062 transitions. [2021-11-02 22:36:54,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:36:54,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3062 transitions. [2021-11-02 22:36:54,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-02 22:36:54,096 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:36:54,096 INFO L513 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:36:54,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:54,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:36:54,311 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr70REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 644 more)] === [2021-11-02 22:36:54,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:54,312 INFO L85 PathProgramCache]: Analyzing trace with hash -790106903, now seen corresponding path program 3 times [2021-11-02 22:36:54,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:36:54,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1857276569] [2021-11-02 22:36:54,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:36:54,313 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:36:54,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:36:54,315 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:36:54,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-02 22:36:55,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-02 22:36:55,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:36:55,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 22:36:55,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:55,974 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:36:55,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:36:57,686 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:36:57,687 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:36:57,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1857276569] [2021-11-02 22:36:57,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1857276569] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:36:57,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:36:57,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-11-02 22:36:57,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530615429] [2021-11-02 22:36:57,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-02 22:36:57,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:36:57,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-02 22:36:57,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 22:36:57,690 INFO L87 Difference]: Start difference. First operand 2088 states and 3062 transitions. Second operand has 34 states, 34 states have (on average 2.823529411764706) internal successors, (96), 34 states have internal predecessors, (96), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:37:06,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:37:06,815 INFO L93 Difference]: Finished difference Result 2144 states and 3210 transitions. [2021-11-02 22:37:06,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-02 22:37:06,816 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.823529411764706) internal successors, (96), 34 states have internal predecessors, (96), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 84 [2021-11-02 22:37:06,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:37:06,822 INFO L225 Difference]: With dead ends: 2144 [2021-11-02 22:37:06,823 INFO L226 Difference]: Without dead ends: 2140 [2021-11-02 22:37:06,825 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1817, Invalid=4189, Unknown=0, NotChecked=0, Total=6006 [2021-11-02 22:37:06,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2021-11-02 22:37:06,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 2112. [2021-11-02 22:37:06,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2112 states, 1642 states have (on average 1.8434835566382461) internal successors, (3027), 2085 states have internal predecessors, (3027), 31 states have call successors, (31), 6 states have call predecessors, (31), 6 states have return successors, (36), 21 states have call predecessors, (36), 30 states have call successors, (36) [2021-11-02 22:37:06,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 3094 transitions. [2021-11-02 22:37:06,874 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 3094 transitions. Word has length 84 [2021-11-02 22:37:06,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:37:06,875 INFO L470 AbstractCegarLoop]: Abstraction has 2112 states and 3094 transitions. [2021-11-02 22:37:06,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.823529411764706) internal successors, (96), 34 states have internal predecessors, (96), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:37:06,875 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 3094 transitions. [2021-11-02 22:37:06,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-02 22:37:06,876 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:37:06,876 INFO L513 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:37:06,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-02 22:37:07,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:37:07,094 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr70REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 644 more)] === [2021-11-02 22:37:07,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:37:07,094 INFO L85 PathProgramCache]: Analyzing trace with hash -870593815, now seen corresponding path program 4 times [2021-11-02 22:37:07,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:37:07,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1737162889] [2021-11-02 22:37:07,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:37:07,095 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:37:07,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:37:07,097 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:37:07,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-02 22:37:07,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:37:07,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:37:07,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-02 22:37:07,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:37:09,241 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:37:09,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:37:14,160 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:37:14,160 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:37:14,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1737162889] [2021-11-02 22:37:14,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1737162889] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:37:14,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:37:14,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2021-11-02 22:37:14,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772220179] [2021-11-02 22:37:14,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-02 22:37:14,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:37:14,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-02 22:37:14,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1000, Invalid=3290, Unknown=0, NotChecked=0, Total=4290 [2021-11-02 22:37:14,166 INFO L87 Difference]: Start difference. First operand 2112 states and 3094 transitions. Second operand has 66 states, 66 states have (on average 1.9393939393939394) internal successors, (128), 66 states have internal predecessors, (128), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:37:34,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:37:34,973 INFO L93 Difference]: Finished difference Result 2206 states and 3366 transitions. [2021-11-02 22:37:34,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-11-02 22:37:34,974 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.9393939393939394) internal successors, (128), 66 states have internal predecessors, (128), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 100 [2021-11-02 22:37:34,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:37:34,981 INFO L225 Difference]: With dead ends: 2206 [2021-11-02 22:37:34,982 INFO L226 Difference]: Without dead ends: 2202 [2021-11-02 22:37:34,990 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2373 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=4552, Invalid=14908, Unknown=0, NotChecked=0, Total=19460 [2021-11-02 22:37:34,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-11-02 22:37:35,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 2142. [2021-11-02 22:37:35,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 1672 states have (on average 1.8379186602870814) internal successors, (3073), 2115 states have internal predecessors, (3073), 31 states have call successors, (31), 6 states have call predecessors, (31), 6 states have return successors, (36), 21 states have call predecessors, (36), 30 states have call successors, (36) [2021-11-02 22:37:35,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 3140 transitions. [2021-11-02 22:37:35,072 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 3140 transitions. Word has length 100 [2021-11-02 22:37:35,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:37:35,073 INFO L470 AbstractCegarLoop]: Abstraction has 2142 states and 3140 transitions. [2021-11-02 22:37:35,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.9393939393939394) internal successors, (128), 66 states have internal predecessors, (128), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:37:35,073 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 3140 transitions. [2021-11-02 22:37:35,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-02 22:37:35,074 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:37:35,075 INFO L513 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:37:35,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-02 22:37:35,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:37:35,291 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr70REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 644 more)] === [2021-11-02 22:37:35,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:37:35,293 INFO L85 PathProgramCache]: Analyzing trace with hash -22317783, now seen corresponding path program 5 times [2021-11-02 22:37:35,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:37:35,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1066919070] [2021-11-02 22:37:35,297 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:37:35,297 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:37:35,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:37:35,298 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:37:35,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f15ee149-caa7-45cb-a3a8-fbfe73af17f4/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-02 22:37:37,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-11-02 22:37:37,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:37:37,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-02 22:37:37,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:37:37,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:37:37,401 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-02 22:37:37,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-11-02 22:37:37,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-11-02 22:37:37,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32