./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-2.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_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/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_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/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_024cba08-a626-42a8-92fa-7d1eaf887a15/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 2c8bfc4504f1d1d767281638f115bf6ca8337de4769381189ae1d6a9b301298b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:32:58,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:32:58,525 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:32:58,596 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:32:58,597 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:32:58,604 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:32:58,609 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:32:58,615 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:32:58,619 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:32:58,630 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:32:58,632 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:32:58,635 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:32:58,636 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:32:58,640 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:32:58,644 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:32:58,652 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:32:58,655 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:32:58,656 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:32:58,664 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:32:58,667 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:32:58,670 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:32:58,671 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:32:58,673 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:32:58,675 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:32:58,679 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:32:58,680 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:32:58,680 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:32:58,682 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:32:58,682 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:32:58,684 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:32:58,684 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:32:58,686 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:32:58,687 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:32:58,688 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:32:58,689 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:32:58,690 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:32:58,691 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:32:58,691 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:32:58,691 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:32:58,692 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:32:58,693 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:32:58,695 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-02 22:32:58,729 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:32:58,730 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:32:58,730 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:32:58,731 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:32:58,732 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:32:58,732 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:32:58,732 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:32:58,733 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:32:58,733 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:32:58,733 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-02 22:32:58,734 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:32:58,734 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:32:58,734 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:32:58,734 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-02 22:32:58,734 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-02 22:32:58,735 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-02 22:32:58,735 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:32:58,735 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-02 22:32:58,735 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:32:58,736 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:32:58,736 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:32:58,736 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:32:58,737 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:32:58,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:32:58,737 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:32:58,737 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:32:58,738 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:32:58,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:32:58,738 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:32:58,738 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_024cba08-a626-42a8-92fa-7d1eaf887a15/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2c8bfc4504f1d1d767281638f115bf6ca8337de4769381189ae1d6a9b301298b [2021-11-02 22:32:59,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:32:59,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:32:59,155 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:32:59,157 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:32:59,158 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:32:59,160 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-2.i [2021-11-02 22:32:59,270 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/data/78c2cf229/07f5e733360344df84ad4d49efdec11d/FLAGb3563aac6 [2021-11-02 22:33:00,144 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:33:00,145 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-2.i [2021-11-02 22:33:00,175 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/data/78c2cf229/07f5e733360344df84ad4d49efdec11d/FLAGb3563aac6 [2021-11-02 22:33:00,239 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/data/78c2cf229/07f5e733360344df84ad4d49efdec11d [2021-11-02 22:33:00,245 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:33:00,247 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-02 22:33:00,264 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:33:00,265 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:33:00,271 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:33:00,272 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:33:00" (1/1) ... [2021-11-02 22:33:00,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59c1431d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:33:00, skipping insertion in model container [2021-11-02 22:33:00,278 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:33:00" (1/1) ... [2021-11-02 22:33:00,288 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:33:00,365 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:33:00,896 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_024cba08-a626-42a8-92fa-7d1eaf887a15/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-2.i[33021,33034] [2021-11-02 22:33:01,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:33:01,156 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 22:33:01,157 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5e21e975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:33:01, skipping insertion in model container [2021-11-02 22:33:01,157 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:33:01,158 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.preprocessor [2021-11-02 22:33:01,161 INFO L168 Benchmark]: Toolchain (without parser) took 912.53 ms. Allocated memory is still 125.8 MB. Free memory was 86.1 MB in the beginning and 87.9 MB in the end (delta: -1.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-02 22:33:01,162 INFO L168 Benchmark]: CDTParser took 0.53 ms. Allocated memory is still 125.8 MB. Free memory was 97.0 MB in the beginning and 97.0 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:33:01,163 INFO L168 Benchmark]: CACSL2BoogieTranslator took 893.86 ms. Allocated memory is still 125.8 MB. Free memory was 85.7 MB in the beginning and 87.9 MB in the end (delta: -2.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-02 22:33:01,166 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.53 ms. Allocated memory is still 125.8 MB. Free memory was 97.0 MB in the beginning and 97.0 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 893.86 ms. Allocated memory is still 125.8 MB. Free memory was 85.7 MB in the beginning and 87.9 MB in the end (delta: -2.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 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_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/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_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/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_024cba08-a626-42a8-92fa-7d1eaf887a15/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 2c8bfc4504f1d1d767281638f115bf6ca8337de4769381189ae1d6a9b301298b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:33:04,087 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:33:04,091 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:33:04,165 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:33:04,166 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:33:04,172 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:33:04,175 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:33:04,184 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:33:04,188 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:33:04,198 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:33:04,201 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:33:04,203 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:33:04,204 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:33:04,208 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:33:04,212 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:33:04,220 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:33:04,222 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:33:04,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:33:04,228 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:33:04,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:33:04,244 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:33:04,246 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:33:04,251 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:33:04,253 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:33:04,266 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:33:04,267 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:33:04,267 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:33:04,270 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:33:04,271 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:33:04,273 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:33:04,273 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:33:04,275 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:33:04,277 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:33:04,279 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:33:04,281 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:33:04,281 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:33:04,283 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:33:04,283 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:33:04,283 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:33:04,286 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:33:04,287 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:33:04,288 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-02 22:33:04,344 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:33:04,345 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:33:04,346 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:33:04,346 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:33:04,349 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:33:04,349 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:33:04,350 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:33:04,350 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:33:04,350 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:33:04,351 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-02 22:33:04,352 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:33:04,353 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:33:04,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:33:04,353 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-02 22:33:04,354 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-02 22:33:04,354 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-02 22:33:04,354 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:33:04,355 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-02 22:33:04,355 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-02 22:33:04,355 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-02 22:33:04,356 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:33:04,356 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:33:04,356 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:33:04,357 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:33:04,357 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:33:04,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:33:04,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:33:04,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:33:04,359 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-02 22:33:04,359 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-02 22:33:04,359 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:33:04,359 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-02 22:33:04,360 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_024cba08-a626-42a8-92fa-7d1eaf887a15/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2c8bfc4504f1d1d767281638f115bf6ca8337de4769381189ae1d6a9b301298b [2021-11-02 22:33:04,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:33:04,968 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:33:04,973 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:33:04,974 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:33:04,976 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:33:04,979 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-2.i [2021-11-02 22:33:05,081 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/data/f028bab08/76db8af3af2f444eb47902ce4e1fae86/FLAGe141b2e0b [2021-11-02 22:33:06,087 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:33:06,090 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-2.i [2021-11-02 22:33:06,127 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/data/f028bab08/76db8af3af2f444eb47902ce4e1fae86/FLAGe141b2e0b [2021-11-02 22:33:06,651 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/data/f028bab08/76db8af3af2f444eb47902ce4e1fae86 [2021-11-02 22:33:06,656 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:33:06,658 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-02 22:33:06,662 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:33:06,662 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:33:06,668 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:33:06,670 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:33:06" (1/1) ... [2021-11-02 22:33:06,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41ea3501 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:33:06, skipping insertion in model container [2021-11-02 22:33:06,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:33:06" (1/1) ... [2021-11-02 22:33:06,683 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:33:06,756 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:33:07,384 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_024cba08-a626-42a8-92fa-7d1eaf887a15/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-2.i[33021,33034] [2021-11-02 22:33:07,563 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:33:07,588 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-02 22:33:07,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:33:07,649 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_024cba08-a626-42a8-92fa-7d1eaf887a15/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-2.i[33021,33034] [2021-11-02 22:33:07,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:33:07,859 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:33:07,925 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_024cba08-a626-42a8-92fa-7d1eaf887a15/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test4-2.i[33021,33034] [2021-11-02 22:33:08,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:33:08,106 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:33:08,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:33:08 WrapperNode [2021-11-02 22:33:08,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:33:08,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:33:08,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:33:08,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:33:08,126 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:33:08" (1/1) ... [2021-11-02 22:33:08,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:33:08" (1/1) ... [2021-11-02 22:33:08,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:33:08" (1/1) ... [2021-11-02 22:33:08,180 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:33:08" (1/1) ... [2021-11-02 22:33:08,309 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:33:08" (1/1) ... [2021-11-02 22:33:08,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:33:08" (1/1) ... [2021-11-02 22:33:08,346 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:33:08" (1/1) ... [2021-11-02 22:33:08,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:33:08,396 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:33:08,396 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:33:08,396 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:33:08,397 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:33:08" (1/1) ... [2021-11-02 22:33:08,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:33:08,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:33:08,446 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:33:08,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:33:08,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-02 22:33:08,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:33:08,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-11-02 22:33:08,514 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-02 22:33:08,514 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-02 22:33:08,514 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-02 22:33:08,515 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-02 22:33:08,515 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-02 22:33:08,515 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-02 22:33:08,515 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-02 22:33:08,516 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2021-11-02 22:33:08,516 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-02 22:33:08,517 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-02 22:33:08,517 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2021-11-02 22:33:08,517 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2021-11-02 22:33:08,518 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2021-11-02 22:33:08,518 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2021-11-02 22:33:08,518 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-02 22:33:08,518 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2021-11-02 22:33:08,519 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2021-11-02 22:33:08,519 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-02 22:33:08,519 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2021-11-02 22:33:08,519 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2021-11-02 22:33:08,519 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2021-11-02 22:33:08,520 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-02 22:33:08,520 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2021-11-02 22:33:08,520 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2021-11-02 22:33:08,520 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2021-11-02 22:33:08,521 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2021-11-02 22:33:08,521 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2021-11-02 22:33:08,521 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2021-11-02 22:33:08,521 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2021-11-02 22:33:08,522 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-11-02 22:33:08,522 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2021-11-02 22:33:08,522 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2021-11-02 22:33:08,522 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2021-11-02 22:33:08,523 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2021-11-02 22:33:08,524 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2021-11-02 22:33:08,524 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2021-11-02 22:33:08,524 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2021-11-02 22:33:08,525 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2021-11-02 22:33:08,525 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2021-11-02 22:33:08,525 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2021-11-02 22:33:08,526 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2021-11-02 22:33:08,526 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2021-11-02 22:33:08,526 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2021-11-02 22:33:08,526 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2021-11-02 22:33:08,527 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2021-11-02 22:33:08,527 INFO L130 BoogieDeclarations]: Found specification of procedure index [2021-11-02 22:33:08,527 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2021-11-02 22:33:08,528 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2021-11-02 22:33:08,528 INFO L130 BoogieDeclarations]: Found specification of procedure ffsl [2021-11-02 22:33:08,528 INFO L130 BoogieDeclarations]: Found specification of procedure ffsll [2021-11-02 22:33:08,528 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2021-11-02 22:33:08,529 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2021-11-02 22:33:08,545 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp_l [2021-11-02 22:33:08,545 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp_l [2021-11-02 22:33:08,546 INFO L130 BoogieDeclarations]: Found specification of procedure explicit_bzero [2021-11-02 22:33:08,546 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2021-11-02 22:33:08,548 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2021-11-02 22:33:08,548 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2021-11-02 22:33:08,548 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2021-11-02 22:33:08,550 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2021-11-02 22:33:08,550 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2021-11-02 22:33:08,550 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-02 22:33:08,550 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-02 22:33:08,550 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-02 22:33:08,551 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-02 22:33:08,551 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-02 22:33:08,552 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-02 22:33:08,552 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-02 22:33:08,552 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-02 22:33:08,552 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-02 22:33:08,552 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-02 22:33:08,553 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-02 22:33:08,554 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-02 22:33:08,554 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-02 22:33:08,554 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-02 22:33:08,554 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-02 22:33:08,555 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-02 22:33:08,555 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-02 22:33:08,555 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-02 22:33:08,555 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-02 22:33:08,555 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-02 22:33:08,556 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-02 22:33:08,556 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-02 22:33:08,556 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-02 22:33:08,556 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-02 22:33:08,556 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-02 22:33:08,557 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-02 22:33:08,557 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-02 22:33:08,557 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-02 22:33:08,557 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-02 22:33:08,557 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-02 22:33:08,558 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-02 22:33:08,558 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-02 22:33:08,559 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-02 22:33:08,559 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-02 22:33:08,559 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-02 22:33:08,559 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-02 22:33:08,559 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-02 22:33:08,560 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-02 22:33:08,560 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-02 22:33:08,560 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-02 22:33:08,560 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-02 22:33:08,560 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-02 22:33:08,561 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-02 22:33:08,561 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-02 22:33:08,561 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-02 22:33:08,561 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-02 22:33:08,561 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-02 22:33:08,562 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-02 22:33:08,562 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-02 22:33:08,562 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-02 22:33:08,563 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-02 22:33:08,563 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-02 22:33:08,563 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-02 22:33:08,564 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-02 22:33:08,564 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-02 22:33:08,565 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-02 22:33:08,566 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-02 22:33:08,569 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-02 22:33:08,569 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-02 22:33:08,570 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-02 22:33:08,571 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-02 22:33:08,571 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-02 22:33:08,572 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-02 22:33:08,573 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-02 22:33:08,573 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-02 22:33:08,574 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-02 22:33:08,579 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-02 22:33:08,580 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-02 22:33:08,580 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-02 22:33:08,580 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-02 22:33:08,580 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-02 22:33:08,580 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-02 22:33:08,581 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-02 22:33:08,581 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-02 22:33:08,581 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-02 22:33:08,581 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-02 22:33:08,581 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-02 22:33:08,582 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-02 22:33:08,582 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-02 22:33:08,582 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-02 22:33:08,582 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-02 22:33:08,582 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-02 22:33:08,582 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-02 22:33:08,583 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-02 22:33:08,583 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-02 22:33:08,583 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-02 22:33:08,583 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-02 22:33:08,583 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-02 22:33:08,584 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-02 22:33:08,584 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-02 22:33:08,584 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-02 22:33:08,584 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-02 22:33:08,584 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-02 22:33:08,585 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-02 22:33:08,585 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-02 22:33:08,585 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-02 22:33:08,585 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-02 22:33:08,585 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-02 22:33:08,585 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-02 22:33:08,586 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-02 22:33:08,586 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-02 22:33:08,586 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-02 22:33:08,586 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-02 22:33:08,586 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-02 22:33:08,587 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-02 22:33:08,587 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-02 22:33:08,587 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-02 22:33:08,587 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-02 22:33:08,587 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-02 22:33:08,587 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-02 22:33:08,588 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-02 22:33:08,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:33:08,589 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-02 22:33:08,589 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2021-11-02 22:33:08,589 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-02 22:33:08,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 22:33:08,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-02 22:33:08,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-02 22:33:08,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 22:33:08,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 22:33:08,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-02 22:33:08,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:33:08,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-02 22:33:08,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-02 22:33:08,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-02 22:33:08,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:33:08,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-11-02 22:33:08,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-02 22:33:09,546 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-02 22:33:17,218 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:33:17,219 INFO L299 CfgBuilder]: Removed 69 assume(true) statements. [2021-11-02 22:33:17,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:33:17 BoogieIcfgContainer [2021-11-02 22:33:17,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:33:17,229 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:33:17,229 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:33:17,233 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:33:17,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:33:06" (1/3) ... [2021-11-02 22:33:17,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31c296e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:33:17, skipping insertion in model container [2021-11-02 22:33:17,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:33:08" (2/3) ... [2021-11-02 22:33:17,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31c296e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:33:17, skipping insertion in model container [2021-11-02 22:33:17,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:33:17" (3/3) ... [2021-11-02 22:33:17,240 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_JEN_test4-2.i [2021-11-02 22:33:17,250 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:33:17,251 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 753 error locations. [2021-11-02 22:33:17,324 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:33:17,340 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 22:33:17,340 INFO L340 AbstractCegarLoop]: Starting to check reachability of 753 error locations. [2021-11-02 22:33:17,423 INFO L276 IsEmpty]: Start isEmpty. Operand has 1481 states, 709 states have (on average 2.2637517630465442) internal successors, (1605), 1466 states have internal predecessors, (1605), 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 22:33:17,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-02 22:33:17,433 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:33:17,434 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:33:17,435 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 749 more)] === [2021-11-02 22:33:17,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:33:17,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1877376258, now seen corresponding path program 1 times [2021-11-02 22:33:17,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:33:17,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [388449924] [2021-11-02 22:33:17,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:33:17,462 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:33:17,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:33:17,470 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:33:17,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-02 22:33:17,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:33:17,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-02 22:33:17,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:33:17,959 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 22:33:17,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:33:18,034 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 22:33:18,035 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:33:18,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [388449924] [2021-11-02 22:33:18,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [388449924] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:33:18,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:33:18,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-02 22:33:18,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429623333] [2021-11-02 22:33:18,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 22:33:18,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:33:18,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 22:33:18,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:33:18,082 INFO L87 Difference]: Start difference. First operand has 1481 states, 709 states have (on average 2.2637517630465442) internal successors, (1605), 1466 states have internal predecessors, (1605), 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 22:33:18,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:33:18,217 INFO L93 Difference]: Finished difference Result 1463 states and 1548 transitions. [2021-11-02 22:33:18,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 22:33:18,219 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 22:33:18,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:33:18,264 INFO L225 Difference]: With dead ends: 1463 [2021-11-02 22:33:18,265 INFO L226 Difference]: Without dead ends: 1460 [2021-11-02 22:33:18,267 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 22:33:18,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2021-11-02 22:33:18,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1460. [2021-11-02 22:33:18,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 700 states have (on average 2.1542857142857144) internal successors, (1508), 1446 states have internal predecessors, (1508), 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 22:33:18,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 1545 transitions. [2021-11-02 22:33:18,432 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 1545 transitions. Word has length 9 [2021-11-02 22:33:18,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:33:18,433 INFO L470 AbstractCegarLoop]: Abstraction has 1460 states and 1545 transitions. [2021-11-02 22:33:18,433 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 22:33:18,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 1545 transitions. [2021-11-02 22:33:18,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-02 22:33:18,435 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:33:18,435 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:33:18,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:33:18,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:33:18,643 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 749 more)] === [2021-11-02 22:33:18,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:33:18,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1877376196, now seen corresponding path program 1 times [2021-11-02 22:33:18,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:33:18,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [865527059] [2021-11-02 22:33:18,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:33:18,647 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:33:18,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:33:18,653 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:33:18,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-02 22:33:18,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:33:18,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:33:18,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:33:19,070 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 22:33:19,107 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 22:33:19,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:33:19,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:33:19,179 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:33:19,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [865527059] [2021-11-02 22:33:19,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [865527059] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:33:19,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:33:19,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-02 22:33:19,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109616566] [2021-11-02 22:33:19,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:33:19,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:33:19,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:33:19,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:33:19,189 INFO L87 Difference]: Start difference. First operand 1460 states and 1545 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 22:33:23,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:33:23,302 INFO L93 Difference]: Finished difference Result 1497 states and 1595 transitions. [2021-11-02 22:33:23,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:33:23,303 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 22:33:23,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:33:23,314 INFO L225 Difference]: With dead ends: 1497 [2021-11-02 22:33:23,314 INFO L226 Difference]: Without dead ends: 1497 [2021-11-02 22:33:23,315 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 22:33:23,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2021-11-02 22:33:23,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1443. [2021-11-02 22:33:23,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1443 states, 776 states have (on average 1.9974226804123711) internal successors, (1550), 1429 states have internal predecessors, (1550), 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 22:33:23,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1443 states to 1443 states and 1587 transitions. [2021-11-02 22:33:23,367 INFO L78 Accepts]: Start accepts. Automaton has 1443 states and 1587 transitions. Word has length 9 [2021-11-02 22:33:23,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:33:23,367 INFO L470 AbstractCegarLoop]: Abstraction has 1443 states and 1587 transitions. [2021-11-02 22:33:23,368 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 22:33:23,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1443 states and 1587 transitions. [2021-11-02 22:33:23,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-02 22:33:23,368 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:33:23,369 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:33:23,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:33:23,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:33:23,583 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 749 more)] === [2021-11-02 22:33:23,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:33:23,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1877376195, now seen corresponding path program 1 times [2021-11-02 22:33:23,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:33:23,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2048398161] [2021-11-02 22:33:23,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:33:23,590 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:33:23,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:33:23,593 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:33:23,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-02 22:33:23,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:33:23,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:33:23,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:33:23,955 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 22:33:23,989 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 22:33:23,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:33:24,111 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 22:33:24,112 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:33:24,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2048398161] [2021-11-02 22:33:24,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2048398161] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:33:24,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:33:24,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-02 22:33:24,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148373942] [2021-11-02 22:33:24,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:33:24,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:33:24,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:33:24,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:33:24,124 INFO L87 Difference]: Start difference. First operand 1443 states and 1587 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 22:33:32,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:33:32,837 INFO L93 Difference]: Finished difference Result 1797 states and 1962 transitions. [2021-11-02 22:33:32,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:33:32,838 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 22:33:32,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:33:32,851 INFO L225 Difference]: With dead ends: 1797 [2021-11-02 22:33:32,851 INFO L226 Difference]: Without dead ends: 1797 [2021-11-02 22:33:32,852 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 22:33:32,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1797 states. [2021-11-02 22:33:32,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1797 to 1599. [2021-11-02 22:33:32,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 942 states have (on average 1.970276008492569) internal successors, (1856), 1585 states have internal predecessors, (1856), 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 22:33:32,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 1893 transitions. [2021-11-02 22:33:32,941 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 1893 transitions. Word has length 9 [2021-11-02 22:33:32,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:33:32,941 INFO L470 AbstractCegarLoop]: Abstraction has 1599 states and 1893 transitions. [2021-11-02 22:33:32,942 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 22:33:32,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 1893 transitions. [2021-11-02 22:33:32,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-02 22:33:32,943 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:33:32,943 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:33:32,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:33:33,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:33:33,159 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr640REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 749 more)] === [2021-11-02 22:33:33,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:33:33,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1932567471, now seen corresponding path program 1 times [2021-11-02 22:33:33,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:33:33,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1780185577] [2021-11-02 22:33:33,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:33:33,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:33:33,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:33:33,162 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:33:33,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-02 22:33:33,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:33:33,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:33:33,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:33:33,455 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 22:33:33,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:33:33,504 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 22:33:33,504 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:33:33,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1780185577] [2021-11-02 22:33:33,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1780185577] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:33:33,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:33:33,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-02 22:33:33,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60379174] [2021-11-02 22:33:33,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:33:33,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:33:33,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:33:33,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:33:33,511 INFO L87 Difference]: Start difference. First operand 1599 states and 1893 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 22:33:33,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:33:33,704 INFO L93 Difference]: Finished difference Result 2944 states and 3501 transitions. [2021-11-02 22:33:33,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:33:33,705 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 22:33:33,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:33:33,730 INFO L225 Difference]: With dead ends: 2944 [2021-11-02 22:33:33,730 INFO L226 Difference]: Without dead ends: 2944 [2021-11-02 22:33:33,730 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 22:33:33,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2944 states. [2021-11-02 22:33:33,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2944 to 2415. [2021-11-02 22:33:33,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2415 states, 1758 states have (on average 1.963594994311718) internal successors, (3452), 2395 states have internal predecessors, (3452), 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 22:33:33,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2415 states to 2415 states and 3501 transitions. [2021-11-02 22:33:33,879 INFO L78 Accepts]: Start accepts. Automaton has 2415 states and 3501 transitions. Word has length 10 [2021-11-02 22:33:33,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:33:33,879 INFO L470 AbstractCegarLoop]: Abstraction has 2415 states and 3501 transitions. [2021-11-02 22:33:33,880 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 22:33:33,880 INFO L276 IsEmpty]: Start isEmpty. Operand 2415 states and 3501 transitions. [2021-11-02 22:33:33,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-02 22:33:33,881 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:33:33,881 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:33:33,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:33:34,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:33:34,096 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr4REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 749 more)] === [2021-11-02 22:33:34,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:33:34,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1315601158, now seen corresponding path program 1 times [2021-11-02 22:33:34,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:33:34,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050871258] [2021-11-02 22:33:34,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:33:34,099 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:33:34,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:33:34,100 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:33:34,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-02 22:33:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:33:34,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:33:34,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:33:34,504 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 22:33:34,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:33:34,561 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 22:33:34,561 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:33:34,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050871258] [2021-11-02 22:33:34,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050871258] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:33:34,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:33:34,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-02 22:33:34,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623271399] [2021-11-02 22:33:34,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:33:34,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:33:34,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:33:34,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:33:34,563 INFO L87 Difference]: Start difference. First operand 2415 states and 3501 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 22:33:34,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:33:34,631 INFO L93 Difference]: Finished difference Result 2355 states and 3415 transitions. [2021-11-02 22:33:34,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:33:34,632 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 22:33:34,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:33:34,651 INFO L225 Difference]: With dead ends: 2355 [2021-11-02 22:33:34,652 INFO L226 Difference]: Without dead ends: 2355 [2021-11-02 22:33:34,652 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 22:33:34,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2021-11-02 22:33:34,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 2355. [2021-11-02 22:33:34,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 1722 states have (on average 1.9547038327526132) internal successors, (3366), 2335 states have internal predecessors, (3366), 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 22:33:34,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 3415 transitions. [2021-11-02 22:33:34,750 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 3415 transitions. Word has length 15 [2021-11-02 22:33:34,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:33:34,750 INFO L470 AbstractCegarLoop]: Abstraction has 2355 states and 3415 transitions. [2021-11-02 22:33:34,751 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 22:33:34,751 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 3415 transitions. [2021-11-02 22:33:34,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 22:33:34,752 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:33:34,752 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 22:33:34,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-02 22:33:34,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:33:34,971 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr28REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 749 more)] === [2021-11-02 22:33:34,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:33:34,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1572327136, now seen corresponding path program 1 times [2021-11-02 22:33:34,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:33:34,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602818637] [2021-11-02 22:33:34,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:33:34,977 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:33:34,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:33:34,979 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:33:34,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-02 22:33:35,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:33:35,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:33:35,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:33:35,447 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 22:33:35,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:33:35,524 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 22:33:35,525 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:33:35,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1602818637] [2021-11-02 22:33:35,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1602818637] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:33:35,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:33:35,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-02 22:33:35,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426552400] [2021-11-02 22:33:35,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:33:35,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:33:35,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:33:35,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:33:35,527 INFO L87 Difference]: Start difference. First operand 2355 states and 3415 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 22:33:35,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:33:35,684 INFO L93 Difference]: Finished difference Result 2327 states and 3359 transitions. [2021-11-02 22:33:35,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:33:35,685 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 22:33:35,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:33:35,708 INFO L225 Difference]: With dead ends: 2327 [2021-11-02 22:33:35,708 INFO L226 Difference]: Without dead ends: 2327 [2021-11-02 22:33:35,709 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 22:33:35,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2327 states. [2021-11-02 22:33:35,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2327 to 2325. [2021-11-02 22:33:35,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2325 states, 1706 states have (on average 1.9390386869871044) internal successors, (3308), 2305 states have internal predecessors, (3308), 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 22:33:35,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2325 states to 2325 states and 3357 transitions. [2021-11-02 22:33:35,816 INFO L78 Accepts]: Start accepts. Automaton has 2325 states and 3357 transitions. Word has length 17 [2021-11-02 22:33:35,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:33:35,817 INFO L470 AbstractCegarLoop]: Abstraction has 2325 states and 3357 transitions. [2021-11-02 22:33:35,817 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 22:33:35,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2325 states and 3357 transitions. [2021-11-02 22:33:35,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-02 22:33:35,820 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:33:35,820 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 22:33:35,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:33:36,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:33:36,042 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr42REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 749 more)] === [2021-11-02 22:33:36,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:33:36,043 INFO L85 PathProgramCache]: Analyzing trace with hash 928479182, now seen corresponding path program 1 times [2021-11-02 22:33:36,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:33:36,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473001019] [2021-11-02 22:33:36,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:33:36,044 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:33:36,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:33:36,046 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:33:36,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-02 22:33:36,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:33:36,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:33:36,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:33:36,457 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 22:33:36,641 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 22:33:36,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:33:36,845 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 22:33:36,845 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:33:36,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473001019] [2021-11-02 22:33:36,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473001019] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:33:36,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:33:36,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-02 22:33:36,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970250750] [2021-11-02 22:33:36,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:33:36,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:33:36,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:33:36,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:33:36,849 INFO L87 Difference]: Start difference. First operand 2325 states and 3357 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 22:33:42,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:33:42,467 INFO L93 Difference]: Finished difference Result 3136 states and 4343 transitions. [2021-11-02 22:33:42,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:33:42,468 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 22:33:42,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:33:42,493 INFO L225 Difference]: With dead ends: 3136 [2021-11-02 22:33:42,493 INFO L226 Difference]: Without dead ends: 3136 [2021-11-02 22:33:42,494 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 22:33:42,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3136 states. [2021-11-02 22:33:42,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3136 to 2321. [2021-11-02 22:33:42,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2321 states, 1706 states have (on average 1.9343493552168816) internal successors, (3300), 2301 states have internal predecessors, (3300), 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 22:33:42,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2321 states to 2321 states and 3349 transitions. [2021-11-02 22:33:42,613 INFO L78 Accepts]: Start accepts. Automaton has 2321 states and 3349 transitions. Word has length 31 [2021-11-02 22:33:42,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:33:42,614 INFO L470 AbstractCegarLoop]: Abstraction has 2321 states and 3349 transitions. [2021-11-02 22:33:42,614 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 22:33:42,615 INFO L276 IsEmpty]: Start isEmpty. Operand 2321 states and 3349 transitions. [2021-11-02 22:33:42,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-02 22:33:42,616 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:33:42,616 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 22:33:42,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-02 22:33:42,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:33:42,832 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr43REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 749 more)] === [2021-11-02 22:33:42,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:33:42,833 INFO L85 PathProgramCache]: Analyzing trace with hash 928479183, now seen corresponding path program 1 times [2021-11-02 22:33:42,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:33:42,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5849708] [2021-11-02 22:33:42,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:33:42,834 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:33:42,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:33:42,836 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:33:42,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-02 22:33:43,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:33:43,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:33:43,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:33:43,250 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 22:33:43,657 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 22:33:43,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:33:44,307 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 22:33:44,308 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:33:44,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5849708] [2021-11-02 22:33:44,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5849708] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:33:44,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:33:44,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-02 22:33:44,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006106394] [2021-11-02 22:33:44,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:33:44,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:33:44,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:33:44,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:33:44,311 INFO L87 Difference]: Start difference. First operand 2321 states and 3349 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 22:33:58,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:33:58,507 INFO L93 Difference]: Finished difference Result 2773 states and 3708 transitions. [2021-11-02 22:33:58,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:33:58,508 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 22:33:58,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:33:58,536 INFO L225 Difference]: With dead ends: 2773 [2021-11-02 22:33:58,536 INFO L226 Difference]: Without dead ends: 2773 [2021-11-02 22:33:58,537 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 22:33:58,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2773 states. [2021-11-02 22:33:58,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2773 to 2317. [2021-11-02 22:33:58,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 1706 states have (on average 1.9296600234466588) internal successors, (3292), 2297 states have internal predecessors, (3292), 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 22:33:58,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 3341 transitions. [2021-11-02 22:33:58,610 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 3341 transitions. Word has length 31 [2021-11-02 22:33:58,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:33:58,611 INFO L470 AbstractCegarLoop]: Abstraction has 2317 states and 3341 transitions. [2021-11-02 22:33:58,611 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 22:33:58,611 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 3341 transitions. [2021-11-02 22:33:58,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-02 22:33:58,613 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:33:58,613 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 22:33:58,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-02 22:33:58,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:33:58,827 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr107REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 749 more)] === [2021-11-02 22:33:58,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:33:58,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1635573428, now seen corresponding path program 1 times [2021-11-02 22:33:58,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:33:58,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [491694122] [2021-11-02 22:33:58,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:33:58,829 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:33:58,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:33:58,830 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:33:58,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-02 22:33:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:33:59,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:33:59,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:33:59,403 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 22:33:59,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:33:59,585 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 22:33:59,585 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:33:59,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [491694122] [2021-11-02 22:33:59,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [491694122] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:33:59,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:33:59,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-02 22:33:59,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016501141] [2021-11-02 22:33:59,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:33:59,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:33:59,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:33:59,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:33:59,588 INFO L87 Difference]: Start difference. First operand 2317 states and 3341 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 22:33:59,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:33:59,700 INFO L93 Difference]: Finished difference Result 2305 states and 3321 transitions. [2021-11-02 22:33:59,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:33:59,701 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 22:33:59,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:33:59,719 INFO L225 Difference]: With dead ends: 2305 [2021-11-02 22:33:59,720 INFO L226 Difference]: Without dead ends: 2305 [2021-11-02 22:33:59,720 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 22:33:59,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2021-11-02 22:33:59,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 2305. [2021-11-02 22:33:59,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2305 states, 1694 states have (on average 1.9315230224321134) internal successors, (3272), 2285 states have internal predecessors, (3272), 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 22:33:59,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2305 states to 2305 states and 3321 transitions. [2021-11-02 22:33:59,790 INFO L78 Accepts]: Start accepts. Automaton has 2305 states and 3321 transitions. Word has length 46 [2021-11-02 22:33:59,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:33:59,790 INFO L470 AbstractCegarLoop]: Abstraction has 2305 states and 3321 transitions. [2021-11-02 22:33:59,791 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 22:33:59,791 INFO L276 IsEmpty]: Start isEmpty. Operand 2305 states and 3321 transitions. [2021-11-02 22:33:59,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-02 22:33:59,793 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:33:59,794 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 22:33:59,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:34:00,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:34:00,007 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr107REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 749 more)] === [2021-11-02 22:34:00,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:34:00,007 INFO L85 PathProgramCache]: Analyzing trace with hash -2024025624, now seen corresponding path program 1 times [2021-11-02 22:34:00,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:34:00,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [529105102] [2021-11-02 22:34:00,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:34:00,009 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:34:00,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:34:00,010 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:34:00,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-02 22:34:00,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:34:00,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:34:00,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:34:01,081 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 22:34:01,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:34:01,639 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 22:34:01,639 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:34:01,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [529105102] [2021-11-02 22:34:01,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [529105102] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:34:01,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:34:01,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-02 22:34:01,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008945306] [2021-11-02 22:34:01,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:34:01,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:34:01,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:34:01,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:34:01,642 INFO L87 Difference]: Start difference. First operand 2305 states and 3321 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 22:34:01,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:34:01,967 INFO L93 Difference]: Finished difference Result 2316 states and 3170 transitions. [2021-11-02 22:34:01,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:34:01,976 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 22:34:01,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:34:01,990 INFO L225 Difference]: With dead ends: 2316 [2021-11-02 22:34:01,991 INFO L226 Difference]: Without dead ends: 2316 [2021-11-02 22:34:01,991 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 22:34:01,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2021-11-02 22:34:02,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 2121. [2021-11-02 22:34:02,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2121 states, 1510 states have (on average 1.9317880794701987) internal successors, (2917), 2101 states have internal predecessors, (2917), 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 22:34:02,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2121 states to 2121 states and 2966 transitions. [2021-11-02 22:34:02,083 INFO L78 Accepts]: Start accepts. Automaton has 2121 states and 2966 transitions. Word has length 54 [2021-11-02 22:34:02,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:34:02,086 INFO L470 AbstractCegarLoop]: Abstraction has 2121 states and 2966 transitions. [2021-11-02 22:34:02,086 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 22:34:02,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2121 states and 2966 transitions. [2021-11-02 22:34:02,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-02 22:34:02,090 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:34:02,090 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 22:34:02,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-02 22:34:02,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:34:02,304 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr61REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 749 more)] === [2021-11-02 22:34:02,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:34:02,305 INFO L85 PathProgramCache]: Analyzing trace with hash -808871559, now seen corresponding path program 1 times [2021-11-02 22:34:02,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:34:02,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [822522942] [2021-11-02 22:34:02,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:34:02,306 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:34:02,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:34:02,309 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:34:02,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-02 22:34:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:34:02,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 22:34:02,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:34:02,961 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 22:34:02,972 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 22:34:03,945 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 22:34:03,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-02 22:34:03,954 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 22:34:03,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-11-02 22:34:03,996 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 22:34:03,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:34:10,789 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 22:34:10,789 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:34:10,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [822522942] [2021-11-02 22:34:10,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [822522942] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:34:10,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:34:10,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-02 22:34:10,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655995490] [2021-11-02 22:34:10,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:34:10,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:34:10,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:34:10,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-02 22:34:10,794 INFO L87 Difference]: Start difference. First operand 2121 states and 2966 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 22:34:34,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:34:34,758 INFO L93 Difference]: Finished difference Result 2769 states and 3746 transitions. [2021-11-02 22:34:34,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:34:34,759 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 22:34:34,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:34:34,778 INFO L225 Difference]: With dead ends: 2769 [2021-11-02 22:34:34,778 INFO L226 Difference]: Without dead ends: 2769 [2021-11-02 22:34:34,778 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=26, Invalid=28, Unknown=2, NotChecked=0, Total=56 [2021-11-02 22:34:34,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2021-11-02 22:34:34,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 2261. [2021-11-02 22:34:34,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2261 states, 1688 states have (on average 1.879739336492891) internal successors, (3173), 2235 states have internal predecessors, (3173), 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 22:34:34,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2261 states to 2261 states and 3234 transitions. [2021-11-02 22:34:34,871 INFO L78 Accepts]: Start accepts. Automaton has 2261 states and 3234 transitions. Word has length 57 [2021-11-02 22:34:34,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:34:34,871 INFO L470 AbstractCegarLoop]: Abstraction has 2261 states and 3234 transitions. [2021-11-02 22:34:34,872 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 22:34:34,872 INFO L276 IsEmpty]: Start isEmpty. Operand 2261 states and 3234 transitions. [2021-11-02 22:34:34,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-02 22:34:34,879 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:34:34,880 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 22:34:34,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-02 22:34:35,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:34:35,101 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr66REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 749 more)] === [2021-11-02 22:34:35,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:34:35,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1667441605, now seen corresponding path program 1 times [2021-11-02 22:34:35,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:34:35,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [653461166] [2021-11-02 22:34:35,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:34:35,104 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:34:35,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:34:35,108 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:34:35,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-02 22:34:35,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:34:35,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:34:35,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:34:36,097 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 22:34:36,124 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 22:34:36,186 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 22:34:36,212 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 22:34:36,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:34:36,429 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 22:34:36,429 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:34:36,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [653461166] [2021-11-02 22:34:36,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [653461166] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:34:36,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:34:36,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-02 22:34:36,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636491823] [2021-11-02 22:34:36,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:34:36,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:34:36,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:34:36,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:34:36,431 INFO L87 Difference]: Start difference. First operand 2261 states and 3234 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 22:34:42,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:34:42,276 INFO L93 Difference]: Finished difference Result 2260 states and 3232 transitions. [2021-11-02 22:34:42,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:34:42,277 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 22:34:42,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:34:42,289 INFO L225 Difference]: With dead ends: 2260 [2021-11-02 22:34:42,289 INFO L226 Difference]: Without dead ends: 2260 [2021-11-02 22:34:42,289 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 117 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:34:42,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2021-11-02 22:34:42,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 2260. [2021-11-02 22:34:42,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2260 states, 1688 states have (on average 1.8785545023696681) internal successors, (3171), 2234 states have internal predecessors, (3171), 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 22:34:42,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 3232 transitions. [2021-11-02 22:34:42,349 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 3232 transitions. Word has length 62 [2021-11-02 22:34:42,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:34:42,350 INFO L470 AbstractCegarLoop]: Abstraction has 2260 states and 3232 transitions. [2021-11-02 22:34:42,350 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 22:34:42,351 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 3232 transitions. [2021-11-02 22:34:42,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-02 22:34:42,352 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:34:42,352 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 22:34:42,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-02 22:34:42,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:34:42,567 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr67REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 749 more)] === [2021-11-02 22:34:42,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:34:42,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1667441604, now seen corresponding path program 1 times [2021-11-02 22:34:42,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:34:42,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1271110330] [2021-11-02 22:34:42,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:34:42,569 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:34:42,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:34:42,571 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:34:42,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-02 22:34:43,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:34:43,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:34:43,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:34:43,417 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 22:34:43,451 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 22:34:43,465 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 22:34:43,585 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 22:34:43,591 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 22:34:43,629 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 22:34:43,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:34:44,145 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 22:34:44,145 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:34:44,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1271110330] [2021-11-02 22:34:44,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1271110330] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:34:44,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:34:44,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-02 22:34:44,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973036687] [2021-11-02 22:34:44,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:34:44,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:34:44,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:34:44,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:34:44,148 INFO L87 Difference]: Start difference. First operand 2260 states and 3232 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 22:35:00,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:35:00,945 INFO L93 Difference]: Finished difference Result 2259 states and 3230 transitions. [2021-11-02 22:35:00,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:35:00,946 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 22:35:00,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:35:00,953 INFO L225 Difference]: With dead ends: 2259 [2021-11-02 22:35:00,953 INFO L226 Difference]: Without dead ends: 2259 [2021-11-02 22:35:00,954 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:35:00,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2021-11-02 22:35:00,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 2259. [2021-11-02 22:35:01,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2259 states, 1686 states have (on average 1.879596678529063) internal successors, (3169), 2233 states have internal predecessors, (3169), 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 22:35:01,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2259 states to 2259 states and 3230 transitions. [2021-11-02 22:35:01,007 INFO L78 Accepts]: Start accepts. Automaton has 2259 states and 3230 transitions. Word has length 62 [2021-11-02 22:35:01,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:35:01,007 INFO L470 AbstractCegarLoop]: Abstraction has 2259 states and 3230 transitions. [2021-11-02 22:35:01,008 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 22:35:01,008 INFO L276 IsEmpty]: Start isEmpty. Operand 2259 states and 3230 transitions. [2021-11-02 22:35:01,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-02 22:35:01,009 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:35:01,009 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 22:35:01,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-02 22:35:01,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:35:01,223 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr70REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 749 more)] === [2021-11-02 22:35:01,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:35:01,224 INFO L85 PathProgramCache]: Analyzing trace with hash -2058509150, now seen corresponding path program 1 times [2021-11-02 22:35:01,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:35:01,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [804958389] [2021-11-02 22:35:01,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:01,225 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:35:01,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:35:01,226 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:35:01,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-02 22:35:01,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:01,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:35:01,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:35:02,202 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 22:35:02,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:35:02,444 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 22:35:02,444 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:35:02,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [804958389] [2021-11-02 22:35:02,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [804958389] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:35:02,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:35:02,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-02 22:35:02,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699663704] [2021-11-02 22:35:02,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:35:02,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:35:02,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:35:02,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:35:02,448 INFO L87 Difference]: Start difference. First operand 2259 states and 3230 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 22:35:02,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:35:02,623 INFO L93 Difference]: Finished difference Result 2269 states and 3248 transitions. [2021-11-02 22:35:02,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:35:02,624 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 22:35:02,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:35:02,636 INFO L225 Difference]: With dead ends: 2269 [2021-11-02 22:35:02,637 INFO L226 Difference]: Without dead ends: 2269 [2021-11-02 22:35:02,637 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 22:35:02,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2021-11-02 22:35:02,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 2269. [2021-11-02 22:35:02,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 1694 states have (on average 1.8778040141676506) internal successors, (3181), 2242 states have internal predecessors, (3181), 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 22:35:02,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 3248 transitions. [2021-11-02 22:35:02,694 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 3248 transitions. Word has length 70 [2021-11-02 22:35:02,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:35:02,695 INFO L470 AbstractCegarLoop]: Abstraction has 2269 states and 3248 transitions. [2021-11-02 22:35:02,695 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 22:35:02,695 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 3248 transitions. [2021-11-02 22:35:02,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-02 22:35:02,696 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:35:02,696 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 22:35:02,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-02 22:35:02,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:35:02,916 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr70REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 749 more)] === [2021-11-02 22:35:02,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:35:02,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1077389214, now seen corresponding path program 1 times [2021-11-02 22:35:02,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:35:02,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1692177276] [2021-11-02 22:35:02,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:35:02,918 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:35:02,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:35:02,918 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:35:02,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-02 22:35:03,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:35:03,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:35:03,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:35:03,876 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 22:35:03,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:35:04,207 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 22:35:04,207 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:35:04,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1692177276] [2021-11-02 22:35:04,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1692177276] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:35:04,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:35:04,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-02 22:35:04,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050187724] [2021-11-02 22:35:04,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:35:04,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:35:04,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:35:04,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:35:04,210 INFO L87 Difference]: Start difference. First operand 2269 states and 3248 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 22:35:04,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:35:04,897 INFO L93 Difference]: Finished difference Result 2283 states and 3276 transitions. [2021-11-02 22:35:04,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 22:35:04,898 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 22:35:04,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:35:04,906 INFO L225 Difference]: With dead ends: 2283 [2021-11-02 22:35:04,906 INFO L226 Difference]: Without dead ends: 2279 [2021-11-02 22:35:04,907 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 22:35:04,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2279 states. [2021-11-02 22:35:04,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 2275. [2021-11-02 22:35:04,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2275 states, 1700 states have (on average 1.8758823529411766) internal successors, (3189), 2248 states have internal predecessors, (3189), 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 22:35:04,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 3256 transitions. [2021-11-02 22:35:04,962 INFO L78 Accepts]: Start accepts. Automaton has 2275 states and 3256 transitions. Word has length 72 [2021-11-02 22:35:04,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:35:04,962 INFO L470 AbstractCegarLoop]: Abstraction has 2275 states and 3256 transitions. [2021-11-02 22:35:04,963 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 22:35:04,963 INFO L276 IsEmpty]: Start isEmpty. Operand 2275 states and 3256 transitions. [2021-11-02 22:35:04,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-02 22:35:04,964 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:35:04,964 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 22:35:04,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-02 22:35:05,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:35:05,179 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr70REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 749 more)] === [2021-11-02 22:35:05,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:35:05,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1730154526, now seen corresponding path program 2 times [2021-11-02 22:35:05,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:35:05,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [116071283] [2021-11-02 22:35:05,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:35:05,181 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:35:05,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:35:05,182 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:35:05,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-02 22:35:06,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:35:06,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:35:06,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:35:06,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:35:06,537 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 22:35:06,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:35:07,279 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 22:35:07,280 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:35:07,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [116071283] [2021-11-02 22:35:07,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [116071283] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:35:07,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:35:07,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-11-02 22:35:07,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121812192] [2021-11-02 22:35:07,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 22:35:07,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:35:07,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 22:35:07,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:35:07,283 INFO L87 Difference]: Start difference. First operand 2275 states and 3256 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 22:35:09,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:35:09,816 INFO L93 Difference]: Finished difference Result 2303 states and 3324 transitions. [2021-11-02 22:35:09,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 22:35:09,818 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 22:35:09,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:35:09,831 INFO L225 Difference]: With dead ends: 2303 [2021-11-02 22:35:09,831 INFO L226 Difference]: Without dead ends: 2299 [2021-11-02 22:35:09,832 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=457, Invalid=949, Unknown=0, NotChecked=0, Total=1406 [2021-11-02 22:35:09,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2299 states. [2021-11-02 22:35:09,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2299 to 2287. [2021-11-02 22:35:09,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 1712 states have (on average 1.8720794392523366) internal successors, (3205), 2260 states have internal predecessors, (3205), 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 22:35:09,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 3272 transitions. [2021-11-02 22:35:09,903 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 3272 transitions. Word has length 76 [2021-11-02 22:35:09,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:35:09,904 INFO L470 AbstractCegarLoop]: Abstraction has 2287 states and 3272 transitions. [2021-11-02 22:35:09,904 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 22:35:09,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 3272 transitions. [2021-11-02 22:35:09,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-02 22:35:09,905 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:35:09,906 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 22:35:09,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-02 22:35:10,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:35:10,119 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr70REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 749 more)] === [2021-11-02 22:35:10,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:35:10,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1222123806, now seen corresponding path program 3 times [2021-11-02 22:35:10,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:35:10,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1084367060] [2021-11-02 22:35:10,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:35:10,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:35:10,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:35:10,122 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:35:10,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-02 22:35:11,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-02 22:35:11,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:35:11,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 22:35:11,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:35:12,430 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 22:35:12,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:35:14,726 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 22:35:14,727 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:35:14,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1084367060] [2021-11-02 22:35:14,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1084367060] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:35:14,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:35:14,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-11-02 22:35:14,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368143811] [2021-11-02 22:35:14,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-02 22:35:14,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:35:14,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-02 22:35:14,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 22:35:14,731 INFO L87 Difference]: Start difference. First operand 2287 states and 3272 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 22:35:25,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:35:25,579 INFO L93 Difference]: Finished difference Result 2343 states and 3420 transitions. [2021-11-02 22:35:25,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-02 22:35:25,580 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 22:35:25,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:35:25,588 INFO L225 Difference]: With dead ends: 2343 [2021-11-02 22:35:25,589 INFO L226 Difference]: Without dead ends: 2339 [2021-11-02 22:35:25,592 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=1817, Invalid=4189, Unknown=0, NotChecked=0, Total=6006 [2021-11-02 22:35:25,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2339 states. [2021-11-02 22:35:25,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2339 to 2311. [2021-11-02 22:35:25,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2311 states, 1736 states have (on average 1.86463133640553) internal successors, (3237), 2284 states have internal predecessors, (3237), 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 22:35:25,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2311 states to 2311 states and 3304 transitions. [2021-11-02 22:35:25,650 INFO L78 Accepts]: Start accepts. Automaton has 2311 states and 3304 transitions. Word has length 84 [2021-11-02 22:35:25,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:35:25,651 INFO L470 AbstractCegarLoop]: Abstraction has 2311 states and 3304 transitions. [2021-11-02 22:35:25,651 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 22:35:25,652 INFO L276 IsEmpty]: Start isEmpty. Operand 2311 states and 3304 transitions. [2021-11-02 22:35:25,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-02 22:35:25,653 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:35:25,653 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 22:35:25,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-02 22:35:25,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:35:25,897 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr70REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 749 more)] === [2021-11-02 22:35:25,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:35:25,898 INFO L85 PathProgramCache]: Analyzing trace with hash -929383198, now seen corresponding path program 4 times [2021-11-02 22:35:25,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:35:25,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1932494888] [2021-11-02 22:35:25,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:35:25,899 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:35:25,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:35:25,901 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:35:25,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-02 22:35:27,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:35:27,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:35:27,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-02 22:35:27,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:35:28,646 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 22:35:28,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:35:34,720 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 22:35:34,720 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:35:34,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1932494888] [2021-11-02 22:35:34,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1932494888] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:35:34,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:35:34,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2021-11-02 22:35:34,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326066663] [2021-11-02 22:35:34,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-02 22:35:34,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:35:34,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-02 22:35:34,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1000, Invalid=3290, Unknown=0, NotChecked=0, Total=4290 [2021-11-02 22:35:34,725 INFO L87 Difference]: Start difference. First operand 2311 states and 3304 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 22:35:59,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:35:59,925 INFO L93 Difference]: Finished difference Result 2405 states and 3576 transitions. [2021-11-02 22:35:59,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-11-02 22:35:59,927 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 22:35:59,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:35:59,934 INFO L225 Difference]: With dead ends: 2405 [2021-11-02 22:35:59,934 INFO L226 Difference]: Without dead ends: 2401 [2021-11-02 22:35:59,943 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2373 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=4552, Invalid=14908, Unknown=0, NotChecked=0, Total=19460 [2021-11-02 22:35:59,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2401 states. [2021-11-02 22:36:00,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2401 to 2341. [2021-11-02 22:36:00,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2341 states, 1766 states have (on average 1.8590033975084939) internal successors, (3283), 2314 states have internal predecessors, (3283), 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 22:36:00,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2341 states to 2341 states and 3350 transitions. [2021-11-02 22:36:00,014 INFO L78 Accepts]: Start accepts. Automaton has 2341 states and 3350 transitions. Word has length 100 [2021-11-02 22:36:00,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:36:00,015 INFO L470 AbstractCegarLoop]: Abstraction has 2341 states and 3350 transitions. [2021-11-02 22:36:00,015 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 22:36:00,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2341 states and 3350 transitions. [2021-11-02 22:36:00,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-02 22:36:00,017 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:36:00,017 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 22:36:00,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:00,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:36:00,231 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr70REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 749 more)] === [2021-11-02 22:36:00,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:00,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1199208670, now seen corresponding path program 5 times [2021-11-02 22:36:00,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:36:00,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1535795653] [2021-11-02 22:36:00,233 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:36:00,233 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:36:00,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:36:00,235 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:36:00,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_024cba08-a626-42a8-92fa-7d1eaf887a15/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-02 22:36:02,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-11-02 22:36:02,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:36:02,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-02 22:36:02,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:02,655 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 22:36:02,983 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-02 22:36:02,984 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 20 treesize of output 27 [2021-11-02 22:36:03,077 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 22:36:03,439 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 42 treesize of output 30