./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bb0a504b43b0de742fcc89ebbe9d313056bb1824edece6c56238a649b6f48626 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:42:04,136 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:42:04,138 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:42:04,168 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:42:04,169 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:42:04,171 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:42:04,172 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:42:04,175 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:42:04,177 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:42:04,178 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:42:04,179 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:42:04,181 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:42:04,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:42:04,183 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:42:04,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:42:04,186 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:42:04,187 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:42:04,188 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:42:04,190 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:42:04,193 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:42:04,195 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:42:04,196 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:42:04,198 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:42:04,199 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:42:04,203 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:42:04,203 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:42:04,204 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:42:04,205 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:42:04,205 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:42:04,207 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:42:04,207 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:42:04,208 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:42:04,209 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:42:04,210 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:42:04,211 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:42:04,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:42:04,213 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:42:04,213 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:42:04,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:42:04,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:42:04,216 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:42:04,217 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-20 06:42:04,242 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:42:04,243 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:42:04,243 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:42:04,243 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:42:04,244 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:42:04,244 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:42:04,245 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:42:04,245 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:42:04,245 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:42:04,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:42:04,246 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:42:04,246 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 06:42:04,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:42:04,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:42:04,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:42:04,247 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 06:42:04,247 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 06:42:04,247 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 06:42:04,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:42:04,248 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 06:42:04,248 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:42:04,248 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:42:04,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:42:04,249 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:42:04,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:42:04,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:42:04,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:42:04,250 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:42:04,250 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:42:04,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:42:04,250 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:42:04,250 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_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb0a504b43b0de742fcc89ebbe9d313056bb1824edece6c56238a649b6f48626 [2021-11-20 06:42:04,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:42:04,583 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:42:04,588 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:42:04,594 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:42:04,595 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:42:04,597 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i [2021-11-20 06:42:04,704 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/data/1b987b6a6/32e7c06822b54da0a4b3f4b1afa11e0f/FLAG14d37f434 [2021-11-20 06:42:05,306 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:42:05,306 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i [2021-11-20 06:42:05,333 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/data/1b987b6a6/32e7c06822b54da0a4b3f4b1afa11e0f/FLAG14d37f434 [2021-11-20 06:42:05,600 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/data/1b987b6a6/32e7c06822b54da0a4b3f4b1afa11e0f [2021-11-20 06:42:05,603 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:42:05,605 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:42:05,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:42:05,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:42:05,622 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:42:05,623 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:42:05" (1/1) ... [2021-11-20 06:42:05,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@472af3aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:05, skipping insertion in model container [2021-11-20 06:42:05,625 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:42:05" (1/1) ... [2021-11-20 06:42:05,634 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:42:05,736 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:42:06,112 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:42:06,133 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-20 06:42:06,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@42409c60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:06, skipping insertion in model container [2021-11-20 06:42:06,134 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:42:06,134 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-20 06:42:06,137 INFO L158 Benchmark]: Toolchain (without parser) took 530.24ms. Allocated memory is still 127.9MB. Free memory was 92.3MB in the beginning and 99.9MB in the end (delta: -7.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 06:42:06,138 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 88.1MB. Free memory was 59.8MB in the beginning and 59.8MB in the end (delta: 27.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:42:06,138 INFO L158 Benchmark]: CACSL2BoogieTranslator took 516.35ms. Allocated memory is still 127.9MB. Free memory was 91.9MB in the beginning and 99.9MB in the end (delta: -8.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 06:42:06,140 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 88.1MB. Free memory was 59.8MB in the beginning and 59.8MB in the end (delta: 27.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 516.35ms. Allocated memory is still 127.9MB. Free memory was 91.9MB in the beginning and 99.9MB in the end (delta: -8.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bb0a504b43b0de742fcc89ebbe9d313056bb1824edece6c56238a649b6f48626 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:42:08,717 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:42:08,721 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:42:08,782 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:42:08,783 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:42:08,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:42:08,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:42:08,797 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:42:08,801 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:42:08,807 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:42:08,809 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:42:08,811 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:42:08,811 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:42:08,814 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:42:08,816 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:42:08,822 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:42:08,824 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:42:08,825 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:42:08,830 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:42:08,845 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:42:08,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:42:08,849 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:42:08,852 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:42:08,855 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:42:08,865 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:42:08,866 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:42:08,867 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:42:08,869 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:42:08,870 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:42:08,871 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:42:08,872 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:42:08,873 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:42:08,875 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:42:08,876 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:42:08,878 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:42:08,878 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:42:08,880 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:42:08,880 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:42:08,880 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:42:08,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:42:08,883 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:42:08,884 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-20 06:42:08,946 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:42:08,946 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:42:08,947 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:42:08,948 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:42:08,949 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:42:08,949 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:42:08,951 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:42:08,951 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:42:08,951 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:42:08,952 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:42:08,953 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:42:08,953 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 06:42:08,954 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:42:08,954 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:42:08,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:42:08,955 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 06:42:08,955 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 06:42:08,955 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 06:42:08,955 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:42:08,956 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 06:42:08,956 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 06:42:08,956 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 06:42:08,957 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:42:08,957 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:42:08,957 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:42:08,957 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:42:08,958 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:42:08,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:42:08,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:42:08,959 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:42:08,959 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-20 06:42:08,959 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 06:42:08,960 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:42:08,960 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 06:42:08,960 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_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb0a504b43b0de742fcc89ebbe9d313056bb1824edece6c56238a649b6f48626 [2021-11-20 06:42:09,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:42:09,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:42:09,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:42:09,439 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:42:09,440 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:42:09,441 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i [2021-11-20 06:42:09,535 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/data/11524f34f/0f4ec0afbed84b21966571afb7d19f4b/FLAGdd05b9817 [2021-11-20 06:42:10,346 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:42:10,347 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i [2021-11-20 06:42:10,370 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/data/11524f34f/0f4ec0afbed84b21966571afb7d19f4b/FLAGdd05b9817 [2021-11-20 06:42:10,560 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/data/11524f34f/0f4ec0afbed84b21966571afb7d19f4b [2021-11-20 06:42:10,562 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:42:10,564 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:42:10,566 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:42:10,566 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:42:10,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:42:10,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:42:10" (1/1) ... [2021-11-20 06:42:10,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b113146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:10, skipping insertion in model container [2021-11-20 06:42:10,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:42:10" (1/1) ... [2021-11-20 06:42:10,589 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:42:10,672 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:42:11,276 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:42:11,309 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-20 06:42:11,322 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:42:11,419 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:42:11,446 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:42:11,498 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:42:11,544 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:42:11,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:11 WrapperNode [2021-11-20 06:42:11,545 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:42:11,546 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:42:11,546 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:42:11,546 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:42:11,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:11" (1/1) ... [2021-11-20 06:42:11,587 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:11" (1/1) ... [2021-11-20 06:42:11,610 INFO L137 Inliner]: procedures = 167, calls = 80, calls flagged for inlining = 24, calls inlined = 6, statements flattened = 99 [2021-11-20 06:42:11,611 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:42:11,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:42:11,612 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:42:11,612 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:42:11,620 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:11" (1/1) ... [2021-11-20 06:42:11,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:11" (1/1) ... [2021-11-20 06:42:11,624 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:11" (1/1) ... [2021-11-20 06:42:11,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:11" (1/1) ... [2021-11-20 06:42:11,635 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:11" (1/1) ... [2021-11-20 06:42:11,651 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:11" (1/1) ... [2021-11-20 06:42:11,653 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:11" (1/1) ... [2021-11-20 06:42:11,657 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:42:11,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:42:11,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:42:11,658 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:42:11,659 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:11" (1/1) ... [2021-11-20 06:42:11,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:42:11,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:42:11,707 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:42:11,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:42:11,748 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-20 06:42:11,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-20 06:42:11,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 06:42:11,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:42:11,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 06:42:11,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 06:42:11,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:42:11,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 06:42:11,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:42:11,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:42:11,921 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:42:11,939 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:42:12,404 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:42:12,412 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:42:12,412 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-20 06:42:12,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:42:12 BoogieIcfgContainer [2021-11-20 06:42:12,415 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:42:12,417 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:42:12,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:42:12,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:42:12,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:42:10" (1/3) ... [2021-11-20 06:42:12,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24a178b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:42:12, skipping insertion in model container [2021-11-20 06:42:12,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:42:11" (2/3) ... [2021-11-20 06:42:12,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24a178b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:42:12, skipping insertion in model container [2021-11-20 06:42:12,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:42:12" (3/3) ... [2021-11-20 06:42:12,424 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test17_2-2.i [2021-11-20 06:42:12,431 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:42:12,431 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-11-20 06:42:12,487 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:42:12,495 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:42:12,495 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-11-20 06:42:12,514 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 63 states have internal predecessors, (76), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:42:12,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 06:42:12,524 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:12,525 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:12,525 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:42:12,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:12,532 INFO L85 PathProgramCache]: Analyzing trace with hash 858994893, now seen corresponding path program 1 times [2021-11-20 06:42:12,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:42:12,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1188544358] [2021-11-20 06:42:12,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:12,548 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:42:12,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:42:12,552 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:42:12,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 06:42:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:12,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-20 06:42:12,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:12,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:12,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:12,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:12,896 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:42:12,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1188544358] [2021-11-20 06:42:12,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1188544358] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:42:12,898 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:42:12,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 06:42:12,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441994065] [2021-11-20 06:42:12,914 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:42:12,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:42:12,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:42:12,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:42:12,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:42:12,964 INFO L87 Difference]: Start difference. First operand has 67 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 63 states have internal predecessors, (76), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:42:12,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:12,995 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2021-11-20 06:42:12,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:42:12,998 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2021-11-20 06:42:12,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:13,008 INFO L225 Difference]: With dead ends: 67 [2021-11-20 06:42:13,009 INFO L226 Difference]: Without dead ends: 65 [2021-11-20 06:42:13,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:42:13,023 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:13,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:42:13,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-20 06:42:13,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-11-20 06:42:13,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 61 states have internal predecessors, (69), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:42:13,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2021-11-20 06:42:13,091 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 14 [2021-11-20 06:42:13,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:13,092 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2021-11-20 06:42:13,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:42:13,093 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2021-11-20 06:42:13,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 06:42:13,095 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:13,096 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:13,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:13,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:42:13,310 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:42:13,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:13,311 INFO L85 PathProgramCache]: Analyzing trace with hash 465967883, now seen corresponding path program 1 times [2021-11-20 06:42:13,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:42:13,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146592441] [2021-11-20 06:42:13,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:13,313 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:42:13,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:42:13,316 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:42:13,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 06:42:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:13,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:42:13,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:13,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:13,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:13,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:13,639 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:42:13,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146592441] [2021-11-20 06:42:13,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146592441] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:42:13,640 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:42:13,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 06:42:13,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680522756] [2021-11-20 06:42:13,641 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:42:13,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:42:13,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:42:13,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:42:13,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:42:13,644 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:42:13,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:13,789 INFO L93 Difference]: Finished difference Result 121 states and 137 transitions. [2021-11-20 06:42:13,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:42:13,792 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-11-20 06:42:13,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:13,795 INFO L225 Difference]: With dead ends: 121 [2021-11-20 06:42:13,807 INFO L226 Difference]: Without dead ends: 121 [2021-11-20 06:42:13,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:42:13,809 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 57 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:13,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 324 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:42:13,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-20 06:42:13,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 69. [2021-11-20 06:42:13,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 45 states have (on average 1.6) internal successors, (72), 64 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:42:13,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2021-11-20 06:42:13,822 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 14 [2021-11-20 06:42:13,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:13,823 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2021-11-20 06:42:13,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:42:13,823 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2021-11-20 06:42:13,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 06:42:13,824 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:13,824 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:13,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:14,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:42:14,040 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:42:14,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:14,041 INFO L85 PathProgramCache]: Analyzing trace with hash 465866789, now seen corresponding path program 1 times [2021-11-20 06:42:14,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:42:14,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446409475] [2021-11-20 06:42:14,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:14,042 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:42:14,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:42:14,046 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:42:14,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 06:42:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:14,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:42:14,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:14,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:42:14,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:14,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:14,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:14,364 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:42:14,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446409475] [2021-11-20 06:42:14,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446409475] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:42:14,364 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:42:14,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-20 06:42:14,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760144175] [2021-11-20 06:42:14,365 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:42:14,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:42:14,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:42:14,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:42:14,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:42:14,367 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:42:14,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:14,604 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2021-11-20 06:42:14,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:42:14,605 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-11-20 06:42:14,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:14,606 INFO L225 Difference]: With dead ends: 93 [2021-11-20 06:42:14,607 INFO L226 Difference]: Without dead ends: 93 [2021-11-20 06:42:14,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:42:14,609 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 24 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:14,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 188 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:42:14,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-20 06:42:14,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 80. [2021-11-20 06:42:14,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 56 states have (on average 1.5892857142857142) internal successors, (89), 75 states have internal predecessors, (89), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:42:14,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2021-11-20 06:42:14,623 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 14 [2021-11-20 06:42:14,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:14,623 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2021-11-20 06:42:14,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:42:14,624 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2021-11-20 06:42:14,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 06:42:14,625 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:14,625 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:14,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:14,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:42:14,845 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:42:14,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:14,847 INFO L85 PathProgramCache]: Analyzing trace with hash 465866790, now seen corresponding path program 1 times [2021-11-20 06:42:14,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:42:14,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1757482968] [2021-11-20 06:42:14,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:14,850 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:42:14,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:42:14,852 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:42:14,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 06:42:14,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:14,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 06:42:14,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:15,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:42:15,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:15,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:16,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:16,656 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:42:16,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1757482968] [2021-11-20 06:42:16,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1757482968] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:42:16,657 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:42:16,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 8] imperfect sequences [] total 17 [2021-11-20 06:42:16,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730785304] [2021-11-20 06:42:16,657 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:42:16,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:42:16,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:42:16,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:42:16,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:42:16,659 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 18 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:42:18,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:18,493 INFO L93 Difference]: Finished difference Result 144 states and 169 transitions. [2021-11-20 06:42:18,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:42:18,494 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2021-11-20 06:42:18,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:18,496 INFO L225 Difference]: With dead ends: 144 [2021-11-20 06:42:18,496 INFO L226 Difference]: Without dead ends: 144 [2021-11-20 06:42:18,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:42:18,499 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 274 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:18,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 486 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 234 Invalid, 0 Unknown, 78 Unchecked, 1.0s Time] [2021-11-20 06:42:18,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-20 06:42:18,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 103. [2021-11-20 06:42:18,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 79 states have (on average 1.5569620253164558) internal successors, (123), 98 states have internal predecessors, (123), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:42:18,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 129 transitions. [2021-11-20 06:42:18,511 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 129 transitions. Word has length 14 [2021-11-20 06:42:18,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:18,512 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 129 transitions. [2021-11-20 06:42:18,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:42:18,512 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 129 transitions. [2021-11-20 06:42:18,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 06:42:18,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:18,513 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:18,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:18,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:42:18,724 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:42:18,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:18,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1353471564, now seen corresponding path program 1 times [2021-11-20 06:42:18,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:42:18,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333025628] [2021-11-20 06:42:18,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:18,725 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:42:18,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:42:18,728 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:42:18,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 06:42:18,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:18,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:42:18,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:18,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:18,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:18,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:18,850 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:42:18,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [333025628] [2021-11-20 06:42:18,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [333025628] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:42:18,851 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:42:18,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 06:42:18,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720503764] [2021-11-20 06:42:18,851 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:42:18,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:42:18,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:42:18,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:42:18,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:42:18,853 INFO L87 Difference]: Start difference. First operand 103 states and 129 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:42:19,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:19,017 INFO L93 Difference]: Finished difference Result 147 states and 178 transitions. [2021-11-20 06:42:19,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:42:19,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-11-20 06:42:19,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:19,019 INFO L225 Difference]: With dead ends: 147 [2021-11-20 06:42:19,019 INFO L226 Difference]: Without dead ends: 145 [2021-11-20 06:42:19,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:42:19,020 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 48 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:19,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 200 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:42:19,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-20 06:42:19,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 103. [2021-11-20 06:42:19,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 79 states have (on average 1.5443037974683544) internal successors, (122), 98 states have internal predecessors, (122), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:42:19,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2021-11-20 06:42:19,031 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 14 [2021-11-20 06:42:19,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:19,032 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2021-11-20 06:42:19,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:42:19,032 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2021-11-20 06:42:19,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 06:42:19,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:19,033 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:19,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:19,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:42:19,233 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:42:19,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:19,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1353370470, now seen corresponding path program 1 times [2021-11-20 06:42:19,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:42:19,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [11646362] [2021-11-20 06:42:19,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:19,234 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:42:19,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:42:19,239 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:42:19,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 06:42:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:19,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:42:19,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:19,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:19,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:19,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:19,501 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:42:19,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [11646362] [2021-11-20 06:42:19,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [11646362] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:42:19,501 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:42:19,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 06:42:19,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12332583] [2021-11-20 06:42:19,502 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:42:19,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:42:19,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:42:19,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:42:19,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:42:19,503 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:42:19,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:19,557 INFO L93 Difference]: Finished difference Result 89 states and 106 transitions. [2021-11-20 06:42:19,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:42:19,558 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-11-20 06:42:19,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:19,559 INFO L225 Difference]: With dead ends: 89 [2021-11-20 06:42:19,559 INFO L226 Difference]: Without dead ends: 87 [2021-11-20 06:42:19,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:42:19,560 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 0 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:19,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 277 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:42:19,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-20 06:42:19,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-11-20 06:42:19,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.546875) internal successors, (99), 83 states have internal predecessors, (99), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 06:42:19,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 104 transitions. [2021-11-20 06:42:19,578 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 104 transitions. Word has length 14 [2021-11-20 06:42:19,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:19,578 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 104 transitions. [2021-11-20 06:42:19,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:42:19,579 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 104 transitions. [2021-11-20 06:42:19,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 06:42:19,579 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:19,580 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:19,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:19,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:42:19,792 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:42:19,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:19,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1861583910, now seen corresponding path program 1 times [2021-11-20 06:42:19,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:42:19,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [779814961] [2021-11-20 06:42:19,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:19,793 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:42:19,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:42:19,794 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:42:19,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 06:42:19,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:19,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 06:42:19,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:19,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:42:20,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:20,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:22,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:22,937 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:42:22,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [779814961] [2021-11-20 06:42:22,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [779814961] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:42:22,937 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:42:22,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2021-11-20 06:42:22,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58552352] [2021-11-20 06:42:22,938 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:42:22,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 06:42:22,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:42:22,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 06:42:22,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-11-20 06:42:22,940 INFO L87 Difference]: Start difference. First operand 87 states and 104 transitions. Second operand has 24 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:42:26,416 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:42:30,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:30,234 INFO L93 Difference]: Finished difference Result 246 states and 282 transitions. [2021-11-20 06:42:30,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 06:42:30,236 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-11-20 06:42:30,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:30,238 INFO L225 Difference]: With dead ends: 246 [2021-11-20 06:42:30,238 INFO L226 Difference]: Without dead ends: 246 [2021-11-20 06:42:30,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=322, Invalid=1238, Unknown=0, NotChecked=0, Total=1560 [2021-11-20 06:42:30,241 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 521 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 36 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 1286 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:30,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 1286 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 619 Invalid, 1 Unknown, 160 Unchecked, 5.4s Time] [2021-11-20 06:42:30,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-11-20 06:42:30,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 96. [2021-11-20 06:42:30,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 73 states have (on average 1.5205479452054795) internal successors, (111), 92 states have internal predecessors, (111), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 06:42:30,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 116 transitions. [2021-11-20 06:42:30,254 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 116 transitions. Word has length 20 [2021-11-20 06:42:30,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:30,254 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 116 transitions. [2021-11-20 06:42:30,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:42:30,255 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 116 transitions. [2021-11-20 06:42:30,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 06:42:30,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:30,256 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:30,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:30,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:42:30,469 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:42:30,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:30,470 INFO L85 PathProgramCache]: Analyzing trace with hash 740047555, now seen corresponding path program 1 times [2021-11-20 06:42:30,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:42:30,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1222675691] [2021-11-20 06:42:30,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:30,472 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:42:30,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:42:30,473 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:42:30,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 06:42:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:30,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:42:30,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:30,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:42:30,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:42:30,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:30,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:42:30,746 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:42:30,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1222675691] [2021-11-20 06:42:30,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1222675691] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:42:30,746 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:42:30,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 06:42:30,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64812076] [2021-11-20 06:42:30,747 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:42:30,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:42:30,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:42:30,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:42:30,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:42:30,749 INFO L87 Difference]: Start difference. First operand 96 states and 116 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:42:30,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:30,961 INFO L93 Difference]: Finished difference Result 106 states and 127 transitions. [2021-11-20 06:42:30,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:42:30,961 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-11-20 06:42:30,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:30,963 INFO L225 Difference]: With dead ends: 106 [2021-11-20 06:42:30,963 INFO L226 Difference]: Without dead ends: 106 [2021-11-20 06:42:30,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:42:30,964 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 33 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:30,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 218 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:42:30,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-20 06:42:30,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 97. [2021-11-20 06:42:30,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 74 states have (on average 1.527027027027027) internal successors, (113), 93 states have internal predecessors, (113), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 06:42:30,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 118 transitions. [2021-11-20 06:42:30,979 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 118 transitions. Word has length 22 [2021-11-20 06:42:30,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:30,979 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 118 transitions. [2021-11-20 06:42:30,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:42:30,980 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 118 transitions. [2021-11-20 06:42:30,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 06:42:30,981 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:30,981 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:30,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:31,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:42:31,194 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:42:31,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:31,195 INFO L85 PathProgramCache]: Analyzing trace with hash 740047556, now seen corresponding path program 1 times [2021-11-20 06:42:31,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:42:31,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [337914408] [2021-11-20 06:42:31,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:31,195 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:42:31,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:42:31,196 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:42:31,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-20 06:42:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:31,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 06:42:31,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:31,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:42:31,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:31,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:33,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:33,106 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:42:33,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [337914408] [2021-11-20 06:42:33,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [337914408] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:42:33,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:42:33,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 16 [2021-11-20 06:42:33,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773569310] [2021-11-20 06:42:33,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:42:33,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:42:33,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:42:33,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:42:33,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:42:33,109 INFO L87 Difference]: Start difference. First operand 97 states and 118 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:42:34,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:34,338 INFO L93 Difference]: Finished difference Result 114 states and 128 transitions. [2021-11-20 06:42:34,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:42:34,340 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-11-20 06:42:34,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:34,341 INFO L225 Difference]: With dead ends: 114 [2021-11-20 06:42:34,341 INFO L226 Difference]: Without dead ends: 114 [2021-11-20 06:42:34,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:42:34,343 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 138 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:34,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 258 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 111 Invalid, 0 Unknown, 40 Unchecked, 0.8s Time] [2021-11-20 06:42:34,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-20 06:42:34,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 97. [2021-11-20 06:42:34,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 74 states have (on average 1.5135135135135136) internal successors, (112), 93 states have internal predecessors, (112), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 06:42:34,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2021-11-20 06:42:34,352 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 117 transitions. Word has length 22 [2021-11-20 06:42:34,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:34,353 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 117 transitions. [2021-11-20 06:42:34,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:42:34,353 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 117 transitions. [2021-11-20 06:42:34,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-20 06:42:34,355 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:34,355 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:34,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:34,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:42:34,569 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:42:34,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:34,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1466637803, now seen corresponding path program 1 times [2021-11-20 06:42:34,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:42:34,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2000774226] [2021-11-20 06:42:34,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:34,571 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:42:34,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:42:34,572 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:42:34,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-20 06:42:34,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:34,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:42:34,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:34,675 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 11 treesize of output 7 [2021-11-20 06:42:34,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 06:42:34,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:34,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:34,843 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 14 treesize of output 12 [2021-11-20 06:42:34,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-20 06:42:34,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:34,906 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:42:34,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2000774226] [2021-11-20 06:42:34,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2000774226] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:42:34,907 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:42:34,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-11-20 06:42:34,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183894952] [2021-11-20 06:42:34,907 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:42:34,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:42:34,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:42:34,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:42:34,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:42:34,909 INFO L87 Difference]: Start difference. First operand 97 states and 117 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:42:35,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:35,365 INFO L93 Difference]: Finished difference Result 165 states and 191 transitions. [2021-11-20 06:42:35,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:42:35,366 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-11-20 06:42:35,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:35,368 INFO L225 Difference]: With dead ends: 165 [2021-11-20 06:42:35,368 INFO L226 Difference]: Without dead ends: 165 [2021-11-20 06:42:35,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:42:35,369 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 109 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:35,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 298 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:42:35,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-20 06:42:35,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 114. [2021-11-20 06:42:35,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 90 states have (on average 1.5555555555555556) internal successors, (140), 109 states have internal predecessors, (140), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 06:42:35,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 148 transitions. [2021-11-20 06:42:35,383 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 148 transitions. Word has length 23 [2021-11-20 06:42:35,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:35,384 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 148 transitions. [2021-11-20 06:42:35,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:42:35,384 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 148 transitions. [2021-11-20 06:42:35,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 06:42:35,386 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:35,386 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:35,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:35,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:42:35,590 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:42:35,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:35,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1778913965, now seen corresponding path program 1 times [2021-11-20 06:42:35,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:42:35,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2041544959] [2021-11-20 06:42:35,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:35,593 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:42:35,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:42:35,594 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:42:35,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-20 06:42:35,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:35,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:42:35,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:35,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:42:35,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:36,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:42:36,048 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:42:36,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2041544959] [2021-11-20 06:42:36,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2041544959] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:42:36,048 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:42:36,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 8 [2021-11-20 06:42:36,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317668026] [2021-11-20 06:42:36,049 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:42:36,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:42:36,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:42:36,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:42:36,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:42:36,050 INFO L87 Difference]: Start difference. First operand 114 states and 148 transitions. Second operand has 9 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:42:36,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:36,204 INFO L93 Difference]: Finished difference Result 113 states and 146 transitions. [2021-11-20 06:42:36,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:42:36,205 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2021-11-20 06:42:36,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:36,207 INFO L225 Difference]: With dead ends: 113 [2021-11-20 06:42:36,207 INFO L226 Difference]: Without dead ends: 113 [2021-11-20 06:42:36,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:42:36,208 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 145 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:36,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 211 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:42:36,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-20 06:42:36,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-11-20 06:42:36,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 90 states have (on average 1.5333333333333334) internal successors, (138), 108 states have internal predecessors, (138), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 06:42:36,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 146 transitions. [2021-11-20 06:42:36,216 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 146 transitions. Word has length 24 [2021-11-20 06:42:36,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:36,217 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 146 transitions. [2021-11-20 06:42:36,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:42:36,217 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 146 transitions. [2021-11-20 06:42:36,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 06:42:36,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:36,218 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:36,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:36,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:42:36,433 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:42:36,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:36,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1778868221, now seen corresponding path program 1 times [2021-11-20 06:42:36,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:42:36,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1104055038] [2021-11-20 06:42:36,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:36,434 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:42:36,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:42:36,435 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:42:36,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-20 06:42:36,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:36,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:42:36,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:36,599 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 11 treesize of output 7 [2021-11-20 06:42:36,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 06:42:36,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:36,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:36,882 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 14 treesize of output 12 [2021-11-20 06:42:36,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-11-20 06:42:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:36,985 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:42:36,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1104055038] [2021-11-20 06:42:36,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1104055038] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:42:36,985 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:42:36,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-11-20 06:42:36,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502703670] [2021-11-20 06:42:36,985 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:42:36,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:42:36,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:42:36,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:42:36,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:42:36,987 INFO L87 Difference]: Start difference. First operand 113 states and 146 transitions. Second operand has 11 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:42:37,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:37,615 INFO L93 Difference]: Finished difference Result 160 states and 183 transitions. [2021-11-20 06:42:37,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:42:37,616 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-11-20 06:42:37,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:37,618 INFO L225 Difference]: With dead ends: 160 [2021-11-20 06:42:37,618 INFO L226 Difference]: Without dead ends: 160 [2021-11-20 06:42:37,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:42:37,620 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 178 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:37,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 360 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:42:37,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-20 06:42:37,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 117. [2021-11-20 06:42:37,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 94 states have (on average 1.5106382978723405) internal successors, (142), 112 states have internal predecessors, (142), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-20 06:42:37,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 150 transitions. [2021-11-20 06:42:37,627 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 150 transitions. Word has length 24 [2021-11-20 06:42:37,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:37,627 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 150 transitions. [2021-11-20 06:42:37,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 11 states have internal predecessors, (38), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:42:37,628 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 150 transitions. [2021-11-20 06:42:37,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 06:42:37,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:37,629 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:37,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:37,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:42:37,834 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:42:37,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:37,834 INFO L85 PathProgramCache]: Analyzing trace with hash -878858933, now seen corresponding path program 1 times [2021-11-20 06:42:37,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:42:37,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1302957308] [2021-11-20 06:42:37,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:37,835 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:42:37,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:42:37,836 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:42:37,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-20 06:42:37,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:37,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:42:37,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:37,955 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 [2021-11-20 06:42:38,121 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-20 06:42:38,121 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 18 treesize of output 23 [2021-11-20 06:42:38,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:42:38,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:38,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:42:38,432 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:42:38,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1302957308] [2021-11-20 06:42:38,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1302957308] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:42:38,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:42:38,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-11-20 06:42:38,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169508365] [2021-11-20 06:42:38,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:42:38,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:42:38,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:42:38,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:42:38,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:42:38,434 INFO L87 Difference]: Start difference. First operand 117 states and 150 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 06:42:38,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:42:38,853 INFO L93 Difference]: Finished difference Result 181 states and 229 transitions. [2021-11-20 06:42:38,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:42:38,853 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-11-20 06:42:38,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:42:38,855 INFO L225 Difference]: With dead ends: 181 [2021-11-20 06:42:38,855 INFO L226 Difference]: Without dead ends: 181 [2021-11-20 06:42:38,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:42:38,857 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 84 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:42:38,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 435 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 193 Invalid, 0 Unknown, 88 Unchecked, 0.4s Time] [2021-11-20 06:42:38,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-20 06:42:38,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 136. [2021-11-20 06:42:38,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 114 states have (on average 1.4736842105263157) internal successors, (168), 129 states have internal predecessors, (168), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-20 06:42:38,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 179 transitions. [2021-11-20 06:42:38,865 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 179 transitions. Word has length 26 [2021-11-20 06:42:38,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:42:38,866 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 179 transitions. [2021-11-20 06:42:38,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 06:42:38,866 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 179 transitions. [2021-11-20 06:42:38,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 06:42:38,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:42:38,868 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:42:38,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-20 06:42:39,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:42:39,082 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:42:39,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:42:39,085 INFO L85 PathProgramCache]: Analyzing trace with hash -878858932, now seen corresponding path program 1 times [2021-11-20 06:42:39,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:42:39,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1568325601] [2021-11-20 06:42:39,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:42:39,086 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:42:39,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:42:39,088 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:42:39,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-20 06:42:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:42:39,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-20 06:42:39,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:42:39,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:42:43,924 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:42:43,924 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 21 treesize of output 23 [2021-11-20 06:42:44,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:44,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:42:58,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:42:58,159 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:42:58,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1568325601] [2021-11-20 06:42:58,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1568325601] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:42:58,159 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:42:58,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-11-20 06:42:58,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488395261] [2021-11-20 06:42:58,159 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:42:58,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 06:42:58,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:42:58,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 06:42:58,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=698, Unknown=4, NotChecked=0, Total=812 [2021-11-20 06:42:58,162 INFO L87 Difference]: Start difference. First operand 136 states and 179 transitions. Second operand has 29 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 25 states have internal predecessors, (42), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:43:04,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:04,711 INFO L93 Difference]: Finished difference Result 208 states and 266 transitions. [2021-11-20 06:43:04,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 06:43:04,712 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 25 states have internal predecessors, (42), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 26 [2021-11-20 06:43:04,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:04,714 INFO L225 Difference]: With dead ends: 208 [2021-11-20 06:43:04,715 INFO L226 Difference]: Without dead ends: 208 [2021-11-20 06:43:04,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=181, Invalid=1146, Unknown=5, NotChecked=0, Total=1332 [2021-11-20 06:43:04,717 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 100 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 308 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:04,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 1010 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 187 Invalid, 0 Unknown, 308 Unchecked, 0.8s Time] [2021-11-20 06:43:04,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-20 06:43:04,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 154. [2021-11-20 06:43:04,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 128 states have (on average 1.4609375) internal successors, (187), 144 states have internal predecessors, (187), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-20 06:43:04,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 204 transitions. [2021-11-20 06:43:04,727 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 204 transitions. Word has length 26 [2021-11-20 06:43:04,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:04,728 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 204 transitions. [2021-11-20 06:43:04,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 25 states have internal predecessors, (42), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:43:04,728 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 204 transitions. [2021-11-20 06:43:04,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 06:43:04,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:04,730 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:04,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:04,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:43:04,944 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:43:04,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:04,945 INFO L85 PathProgramCache]: Analyzing trace with hash -24310932, now seen corresponding path program 1 times [2021-11-20 06:43:04,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:43:04,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1970564750] [2021-11-20 06:43:04,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:04,945 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:43:04,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:43:04,946 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:43:04,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-20 06:43:05,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:05,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:43:05,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:05,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:43:05,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:05,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:43:05,543 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:43:05,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1970564750] [2021-11-20 06:43:05,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1970564750] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:43:05,543 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:43:05,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2021-11-20 06:43:05,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321682476] [2021-11-20 06:43:05,544 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:43:05,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:43:05,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:43:05,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:43:05,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:43:05,546 INFO L87 Difference]: Start difference. First operand 154 states and 204 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:43:06,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:06,140 INFO L93 Difference]: Finished difference Result 309 states and 375 transitions. [2021-11-20 06:43:06,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:43:06,141 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2021-11-20 06:43:06,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:06,143 INFO L225 Difference]: With dead ends: 309 [2021-11-20 06:43:06,143 INFO L226 Difference]: Without dead ends: 309 [2021-11-20 06:43:06,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:43:06,144 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 422 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:06,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 446 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:43:06,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-11-20 06:43:06,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 137. [2021-11-20 06:43:06,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 111 states have (on average 1.4414414414414414) internal successors, (160), 127 states have internal predecessors, (160), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-20 06:43:06,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 177 transitions. [2021-11-20 06:43:06,156 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 177 transitions. Word has length 27 [2021-11-20 06:43:06,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:06,157 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 177 transitions. [2021-11-20 06:43:06,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:43:06,157 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 177 transitions. [2021-11-20 06:43:06,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 06:43:06,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:06,159 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:06,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:06,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:43:06,372 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:43:06,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:06,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1525074233, now seen corresponding path program 1 times [2021-11-20 06:43:06,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:43:06,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [868850813] [2021-11-20 06:43:06,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:06,375 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:43:06,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:43:06,377 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:43:06,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-20 06:43:06,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:06,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:43:06,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:06,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:43:06,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:06,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:43:06,673 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:43:06,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [868850813] [2021-11-20 06:43:06,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [868850813] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:06,674 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:43:06,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 06:43:06,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822337450] [2021-11-20 06:43:06,674 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:06,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:43:06,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:43:06,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:43:06,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:43:06,675 INFO L87 Difference]: Start difference. First operand 137 states and 177 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:43:06,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:06,750 INFO L93 Difference]: Finished difference Result 167 states and 208 transitions. [2021-11-20 06:43:06,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:43:06,751 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2021-11-20 06:43:06,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:06,753 INFO L225 Difference]: With dead ends: 167 [2021-11-20 06:43:06,753 INFO L226 Difference]: Without dead ends: 167 [2021-11-20 06:43:06,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:43:06,754 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 28 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:06,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 316 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:43:06,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-20 06:43:06,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 136. [2021-11-20 06:43:06,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 110 states have (on average 1.4272727272727272) internal successors, (157), 126 states have internal predecessors, (157), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-20 06:43:06,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 174 transitions. [2021-11-20 06:43:06,764 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 174 transitions. Word has length 28 [2021-11-20 06:43:06,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:06,764 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 174 transitions. [2021-11-20 06:43:06,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:43:06,765 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 174 transitions. [2021-11-20 06:43:06,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 06:43:06,766 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:06,766 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:06,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:06,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:43:06,980 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:43:06,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:06,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1027082728, now seen corresponding path program 1 times [2021-11-20 06:43:06,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:43:06,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1582363603] [2021-11-20 06:43:06,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:06,981 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:43:06,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:43:06,982 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:43:06,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-20 06:43:07,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:07,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:43:07,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:07,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:43:07,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:07,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:43:07,270 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:43:07,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1582363603] [2021-11-20 06:43:07,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1582363603] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:43:07,270 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:43:07,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 06:43:07,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451852635] [2021-11-20 06:43:07,271 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:43:07,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:43:07,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:43:07,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:43:07,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:43:07,272 INFO L87 Difference]: Start difference. First operand 136 states and 174 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:43:07,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:07,434 INFO L93 Difference]: Finished difference Result 184 states and 217 transitions. [2021-11-20 06:43:07,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:43:07,435 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-11-20 06:43:07,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:07,437 INFO L225 Difference]: With dead ends: 184 [2021-11-20 06:43:07,437 INFO L226 Difference]: Without dead ends: 184 [2021-11-20 06:43:07,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:43:07,438 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 95 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:07,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 310 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:43:07,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-20 06:43:07,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 126. [2021-11-20 06:43:07,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 100 states have (on average 1.38) internal successors, (138), 116 states have internal predecessors, (138), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-20 06:43:07,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 155 transitions. [2021-11-20 06:43:07,447 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 155 transitions. Word has length 28 [2021-11-20 06:43:07,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:07,447 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 155 transitions. [2021-11-20 06:43:07,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:43:07,448 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 155 transitions. [2021-11-20 06:43:07,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 06:43:07,449 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:07,449 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:07,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:07,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:43:07,663 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:43:07,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:07,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1348568058, now seen corresponding path program 2 times [2021-11-20 06:43:07,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:43:07,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1753895344] [2021-11-20 06:43:07,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:43:07,664 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:43:07,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:43:07,666 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:43:07,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-20 06:43:07,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:43:07,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:43:07,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 06:43:07,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:07,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:43:09,088 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:43:09,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:14,095 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:43:14,095 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:43:14,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1753895344] [2021-11-20 06:43:14,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1753895344] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:43:14,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:43:14,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 29 [2021-11-20 06:43:14,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886043014] [2021-11-20 06:43:14,096 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:43:14,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-20 06:43:14,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:43:14,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-20 06:43:14,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2021-11-20 06:43:14,098 INFO L87 Difference]: Start difference. First operand 126 states and 155 transitions. Second operand has 30 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 28 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:43:21,784 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:43:26,099 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:43:30,110 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:43:33,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:33,552 INFO L93 Difference]: Finished difference Result 238 states and 304 transitions. [2021-11-20 06:43:33,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-20 06:43:33,554 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 28 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2021-11-20 06:43:33,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:33,557 INFO L225 Difference]: With dead ends: 238 [2021-11-20 06:43:33,557 INFO L226 Difference]: Without dead ends: 238 [2021-11-20 06:43:33,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=753, Invalid=2787, Unknown=0, NotChecked=0, Total=3540 [2021-11-20 06:43:33,560 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 346 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 73 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:33,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 907 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 789 Invalid, 3 Unknown, 132 Unchecked, 10.4s Time] [2021-11-20 06:43:33,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-20 06:43:33,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 144. [2021-11-20 06:43:33,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 118 states have (on average 1.3728813559322033) internal successors, (162), 134 states have internal predecessors, (162), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-20 06:43:33,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 179 transitions. [2021-11-20 06:43:33,572 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 179 transitions. Word has length 29 [2021-11-20 06:43:33,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:33,573 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 179 transitions. [2021-11-20 06:43:33,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 28 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:43:33,573 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 179 transitions. [2021-11-20 06:43:33,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-20 06:43:33,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:33,575 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:33,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-20 06:43:33,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:43:33,789 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:43:33,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:33,789 INFO L85 PathProgramCache]: Analyzing trace with hash -475836742, now seen corresponding path program 1 times [2021-11-20 06:43:33,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:43:33,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [345040414] [2021-11-20 06:43:33,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:33,790 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:43:33,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:43:33,792 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:43:33,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-20 06:43:33,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:33,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:43:33,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:33,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:43:34,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:43:34,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:43:34,255 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:43:34,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [345040414] [2021-11-20 06:43:34,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [345040414] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:43:34,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:43:34,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-20 06:43:34,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059058226] [2021-11-20 06:43:34,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:43:34,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:43:34,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:43:34,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:43:34,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:43:34,258 INFO L87 Difference]: Start difference. First operand 144 states and 179 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 06:43:34,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:34,646 INFO L93 Difference]: Finished difference Result 162 states and 194 transitions. [2021-11-20 06:43:34,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:43:34,646 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-11-20 06:43:34,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:34,648 INFO L225 Difference]: With dead ends: 162 [2021-11-20 06:43:34,648 INFO L226 Difference]: Without dead ends: 162 [2021-11-20 06:43:34,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:43:34,649 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 43 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:34,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 380 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 177 Invalid, 0 Unknown, 37 Unchecked, 0.4s Time] [2021-11-20 06:43:34,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-20 06:43:34,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 145. [2021-11-20 06:43:34,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 119 states have (on average 1.3697478991596639) internal successors, (163), 135 states have internal predecessors, (163), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-20 06:43:34,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 180 transitions. [2021-11-20 06:43:34,658 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 180 transitions. Word has length 31 [2021-11-20 06:43:34,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:34,659 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 180 transitions. [2021-11-20 06:43:34,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 06:43:34,659 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 180 transitions. [2021-11-20 06:43:34,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-20 06:43:34,660 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:34,661 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:34,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:34,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:43:34,866 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:43:34,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:34,867 INFO L85 PathProgramCache]: Analyzing trace with hash -475836741, now seen corresponding path program 1 times [2021-11-20 06:43:34,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:43:34,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [611928472] [2021-11-20 06:43:34,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:34,868 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:43:34,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:43:34,870 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:43:34,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-20 06:43:34,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:34,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 06:43:34,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:35,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:43:35,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:43:35,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:37,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:43:37,056 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:43:37,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [611928472] [2021-11-20 06:43:37,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [611928472] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:43:37,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:43:37,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 18 [2021-11-20 06:43:37,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188512206] [2021-11-20 06:43:37,057 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:43:37,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 06:43:37,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:43:37,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 06:43:37,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:43:37,057 INFO L87 Difference]: Start difference. First operand 145 states and 180 transitions. Second operand has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:43:39,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:39,519 INFO L93 Difference]: Finished difference Result 294 states and 344 transitions. [2021-11-20 06:43:39,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 06:43:39,520 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 31 [2021-11-20 06:43:39,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:39,522 INFO L225 Difference]: With dead ends: 294 [2021-11-20 06:43:39,522 INFO L226 Difference]: Without dead ends: 294 [2021-11-20 06:43:39,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-11-20 06:43:39,523 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 193 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 379 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:39,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 1095 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 394 Invalid, 0 Unknown, 379 Unchecked, 1.6s Time] [2021-11-20 06:43:39,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-11-20 06:43:39,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 156. [2021-11-20 06:43:39,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 130 states have (on average 1.3923076923076922) internal successors, (181), 146 states have internal predecessors, (181), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-20 06:43:39,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 198 transitions. [2021-11-20 06:43:39,531 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 198 transitions. Word has length 31 [2021-11-20 06:43:39,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:39,532 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 198 transitions. [2021-11-20 06:43:39,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:43:39,532 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 198 transitions. [2021-11-20 06:43:39,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 06:43:39,533 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:39,533 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:39,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:39,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:43:39,744 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:43:39,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:39,745 INFO L85 PathProgramCache]: Analyzing trace with hash 818465468, now seen corresponding path program 1 times [2021-11-20 06:43:39,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:43:39,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [807875937] [2021-11-20 06:43:39,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:39,745 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:43:39,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:43:39,746 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:43:39,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-20 06:43:39,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:39,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:43:39,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:39,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:43:39,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:39,938 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 06:43:39,938 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 21 treesize of output 20 [2021-11-20 06:43:39,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:43:39,993 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:43:39,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [807875937] [2021-11-20 06:43:39,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [807875937] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:43:39,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:43:39,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-11-20 06:43:39,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136518507] [2021-11-20 06:43:39,994 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:43:39,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:43:39,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:43:39,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:43:39,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:43:39,995 INFO L87 Difference]: Start difference. First operand 156 states and 198 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:43:40,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:40,240 INFO L93 Difference]: Finished difference Result 183 states and 229 transitions. [2021-11-20 06:43:40,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:43:40,241 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2021-11-20 06:43:40,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:40,242 INFO L225 Difference]: With dead ends: 183 [2021-11-20 06:43:40,243 INFO L226 Difference]: Without dead ends: 183 [2021-11-20 06:43:40,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:43:40,244 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 89 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:40,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 148 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:43:40,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-20 06:43:40,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 156. [2021-11-20 06:43:40,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 130 states have (on average 1.3923076923076922) internal successors, (181), 146 states have internal predecessors, (181), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-20 06:43:40,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 198 transitions. [2021-11-20 06:43:40,251 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 198 transitions. Word has length 32 [2021-11-20 06:43:40,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:40,251 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 198 transitions. [2021-11-20 06:43:40,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:43:40,251 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 198 transitions. [2021-11-20 06:43:40,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 06:43:40,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:40,252 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:40,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-20 06:43:40,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:43:40,464 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:43:40,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:40,464 INFO L85 PathProgramCache]: Analyzing trace with hash 818465469, now seen corresponding path program 1 times [2021-11-20 06:43:40,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:43:40,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1588380431] [2021-11-20 06:43:40,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:43:40,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:43:40,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:43:40,466 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:43:40,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-20 06:43:40,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:43:40,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 06:43:40,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:40,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:43:40,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:43:41,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:43:41,135 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 25 treesize of output 29 [2021-11-20 06:43:41,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:43:41,705 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:43:41,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1588380431] [2021-11-20 06:43:41,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1588380431] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:43:41,705 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:43:41,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-11-20 06:43:41,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060600995] [2021-11-20 06:43:41,706 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:43:41,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:43:41,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:43:41,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:43:41,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:43:41,707 INFO L87 Difference]: Start difference. First operand 156 states and 198 transitions. Second operand has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 06:43:44,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:43:44,085 INFO L93 Difference]: Finished difference Result 344 states and 415 transitions. [2021-11-20 06:43:44,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:43:44,086 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-11-20 06:43:44,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:43:44,088 INFO L225 Difference]: With dead ends: 344 [2021-11-20 06:43:44,088 INFO L226 Difference]: Without dead ends: 344 [2021-11-20 06:43:44,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2021-11-20 06:43:44,091 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 463 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:43:44,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 379 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 06:43:44,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-11-20 06:43:44,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 174. [2021-11-20 06:43:44,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 147 states have (on average 1.3877551020408163) internal successors, (204), 161 states have internal predecessors, (204), 8 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (15), 10 states have call predecessors, (15), 8 states have call successors, (15) [2021-11-20 06:43:44,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 227 transitions. [2021-11-20 06:43:44,118 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 227 transitions. Word has length 32 [2021-11-20 06:43:44,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:43:44,119 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 227 transitions. [2021-11-20 06:43:44,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 06:43:44,119 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 227 transitions. [2021-11-20 06:43:44,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 06:43:44,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:43:44,120 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:43:44,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-20 06:43:44,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:43:44,332 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:43:44,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:43:44,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1191141044, now seen corresponding path program 2 times [2021-11-20 06:43:44,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:43:44,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988512180] [2021-11-20 06:43:44,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:43:44,333 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:43:44,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:43:44,333 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:43:44,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-20 06:43:44,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:43:44,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:43:44,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-20 06:43:44,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:43:44,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:43:44,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:43:47,623 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:43:47,623 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 50 treesize of output 50 [2021-11-20 06:43:47,637 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 06:43:47,637 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 44 treesize of output 44 [2021-11-20 06:43:47,768 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:43:47,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:44:09,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-11-20 06:44:09,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-11-20 06:44:09,942 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:44:09,942 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:44:09,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988512180] [2021-11-20 06:44:09,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988512180] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:44:09,942 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:44:09,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 31 [2021-11-20 06:44:09,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203015823] [2021-11-20 06:44:09,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:44:09,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-20 06:44:09,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:44:09,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-20 06:44:09,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=840, Unknown=6, NotChecked=0, Total=992 [2021-11-20 06:44:09,944 INFO L87 Difference]: Start difference. First operand 174 states and 227 transitions. Second operand has 32 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:44:46,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:46,243 INFO L93 Difference]: Finished difference Result 200 states and 255 transitions. [2021-11-20 06:44:46,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-20 06:44:46,245 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 32 [2021-11-20 06:44:46,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:46,247 INFO L225 Difference]: With dead ends: 200 [2021-11-20 06:44:46,247 INFO L226 Difference]: Without dead ends: 198 [2021-11-20 06:44:46,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 54.3s TimeCoverageRelationStatistics Valid=481, Invalid=2472, Unknown=17, NotChecked=0, Total=2970 [2021-11-20 06:44:46,249 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 128 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 619 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:46,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 760 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 161 Invalid, 0 Unknown, 619 Unchecked, 0.6s Time] [2021-11-20 06:44:46,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-20 06:44:46,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 190. [2021-11-20 06:44:46,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 158 states have (on average 1.3670886075949367) internal successors, (216), 175 states have internal predecessors, (216), 10 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (19), 10 states have call predecessors, (19), 10 states have call successors, (19) [2021-11-20 06:44:46,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 245 transitions. [2021-11-20 06:44:46,259 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 245 transitions. Word has length 32 [2021-11-20 06:44:46,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:46,259 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 245 transitions. [2021-11-20 06:44:46,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:44:46,260 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 245 transitions. [2021-11-20 06:44:46,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 06:44:46,261 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:46,261 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:44:46,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-20 06:44:46,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:44:46,482 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:44:46,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:46,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1162511893, now seen corresponding path program 1 times [2021-11-20 06:44:46,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:44:46,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1416707086] [2021-11-20 06:44:46,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:46,483 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:44:46,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:44:46,484 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:44:46,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-20 06:44:46,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:46,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:44:46,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:44:46,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:44:46,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:44:46,820 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-20 06:44:46,820 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:44:46,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1416707086] [2021-11-20 06:44:46,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1416707086] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:44:46,821 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:44:46,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 06:44:46,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204399786] [2021-11-20 06:44:46,821 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:44:46,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:44:46,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:44:46,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:44:46,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:44:46,823 INFO L87 Difference]: Start difference. First operand 190 states and 245 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:44:46,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:46,864 INFO L93 Difference]: Finished difference Result 207 states and 252 transitions. [2021-11-20 06:44:46,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:44:46,866 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2021-11-20 06:44:46,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:46,868 INFO L225 Difference]: With dead ends: 207 [2021-11-20 06:44:46,868 INFO L226 Difference]: Without dead ends: 207 [2021-11-20 06:44:46,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:44:46,869 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 37 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:46,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 255 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:44:46,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-20 06:44:46,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 164. [2021-11-20 06:44:46,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 138 states have (on average 1.3478260869565217) internal successors, (186), 152 states have internal predecessors, (186), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-20 06:44:46,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 203 transitions. [2021-11-20 06:44:46,877 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 203 transitions. Word has length 32 [2021-11-20 06:44:46,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:46,878 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 203 transitions. [2021-11-20 06:44:46,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:44:46,878 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 203 transitions. [2021-11-20 06:44:46,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 06:44:46,879 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:46,879 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:44:46,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-20 06:44:47,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:44:47,086 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:44:47,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:47,086 INFO L85 PathProgramCache]: Analyzing trace with hash -397374190, now seen corresponding path program 1 times [2021-11-20 06:44:47,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:44:47,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2026019180] [2021-11-20 06:44:47,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:47,087 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:44:47,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:44:47,087 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:44:47,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-20 06:44:47,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:47,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 06:44:47,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:44:47,420 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 11 treesize of output 7 [2021-11-20 06:44:47,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 06:44:47,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:44:47,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:44:47,612 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 36 treesize of output 32 [2021-11-20 06:44:48,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:44:48,035 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:44:48,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2026019180] [2021-11-20 06:44:48,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2026019180] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:44:48,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:44:48,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-11-20 06:44:48,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626460128] [2021-11-20 06:44:48,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:44:48,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:44:48,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:44:48,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:44:48,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:44:48,037 INFO L87 Difference]: Start difference. First operand 164 states and 203 transitions. Second operand has 13 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:44:49,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:49,294 INFO L93 Difference]: Finished difference Result 242 states and 274 transitions. [2021-11-20 06:44:49,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:44:49,296 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2021-11-20 06:44:49,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:49,298 INFO L225 Difference]: With dead ends: 242 [2021-11-20 06:44:49,298 INFO L226 Difference]: Without dead ends: 242 [2021-11-20 06:44:49,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:44:49,299 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 162 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:49,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 549 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 06:44:49,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-11-20 06:44:49,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 173. [2021-11-20 06:44:49,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 147 states have (on average 1.3537414965986394) internal successors, (199), 161 states have internal predecessors, (199), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-20 06:44:49,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 216 transitions. [2021-11-20 06:44:49,321 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 216 transitions. Word has length 33 [2021-11-20 06:44:49,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:49,322 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 216 transitions. [2021-11-20 06:44:49,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:44:49,323 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 216 transitions. [2021-11-20 06:44:49,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 06:44:49,324 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:49,324 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:44:49,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-20 06:44:49,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:44:49,538 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:44:49,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:49,538 INFO L85 PathProgramCache]: Analyzing trace with hash 566302140, now seen corresponding path program 1 times [2021-11-20 06:44:49,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:44:49,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [908572894] [2021-11-20 06:44:49,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:49,539 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:44:49,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:44:49,540 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:44:49,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-20 06:44:49,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:49,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 06:44:49,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:44:50,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 06:44:50,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 06:44:50,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:44:50,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:44:50,830 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 36 treesize of output 32 [2021-11-20 06:44:51,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:44:51,304 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:44:51,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [908572894] [2021-11-20 06:44:51,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [908572894] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:44:51,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:44:51,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 17 [2021-11-20 06:44:51,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912911320] [2021-11-20 06:44:51,305 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:44:51,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:44:51,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:44:51,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:44:51,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:44:51,306 INFO L87 Difference]: Start difference. First operand 173 states and 216 transitions. Second operand has 18 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:44:51,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:51,724 INFO L93 Difference]: Finished difference Result 197 states and 244 transitions. [2021-11-20 06:44:51,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:44:51,726 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2021-11-20 06:44:51,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:51,727 INFO L225 Difference]: With dead ends: 197 [2021-11-20 06:44:51,727 INFO L226 Difference]: Without dead ends: 197 [2021-11-20 06:44:51,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:44:51,729 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 52 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:51,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 375 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 64 Invalid, 0 Unknown, 91 Unchecked, 0.2s Time] [2021-11-20 06:44:51,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-20 06:44:51,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 184. [2021-11-20 06:44:51,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 156 states have (on average 1.3461538461538463) internal successors, (210), 171 states have internal predecessors, (210), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-20 06:44:51,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 227 transitions. [2021-11-20 06:44:51,736 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 227 transitions. Word has length 34 [2021-11-20 06:44:51,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:51,737 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 227 transitions. [2021-11-20 06:44:51,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:44:51,737 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 227 transitions. [2021-11-20 06:44:51,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 06:44:51,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:51,738 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:44:51,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-20 06:44:51,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:44:51,950 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:44:51,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:51,950 INFO L85 PathProgramCache]: Analyzing trace with hash 375497300, now seen corresponding path program 1 times [2021-11-20 06:44:51,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:44:51,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [907250422] [2021-11-20 06:44:51,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:51,951 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:44:51,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:44:51,952 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:44:51,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-20 06:44:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:52,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 06:44:52,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:44:52,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:44:52,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-20 06:44:52,372 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 23 treesize of output 15 [2021-11-20 06:44:52,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:44:52,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:44:52,568 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 52 treesize of output 48 [2021-11-20 06:44:53,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:44:53,056 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:44:53,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [907250422] [2021-11-20 06:44:53,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [907250422] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:44:53,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:44:53,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-11-20 06:44:53,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432225499] [2021-11-20 06:44:53,057 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:44:53,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:44:53,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:44:53,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:44:53,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:44:53,059 INFO L87 Difference]: Start difference. First operand 184 states and 227 transitions. Second operand has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:44:54,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:54,021 INFO L93 Difference]: Finished difference Result 213 states and 255 transitions. [2021-11-20 06:44:54,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:44:54,022 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2021-11-20 06:44:54,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:54,024 INFO L225 Difference]: With dead ends: 213 [2021-11-20 06:44:54,025 INFO L226 Difference]: Without dead ends: 213 [2021-11-20 06:44:54,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:44:54,026 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 47 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:54,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 432 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 299 Invalid, 0 Unknown, 122 Unchecked, 0.8s Time] [2021-11-20 06:44:54,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-11-20 06:44:54,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 179. [2021-11-20 06:44:54,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 151 states have (on average 1.3509933774834437) internal successors, (204), 166 states have internal predecessors, (204), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-20 06:44:54,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 221 transitions. [2021-11-20 06:44:54,035 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 221 transitions. Word has length 35 [2021-11-20 06:44:54,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:54,035 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 221 transitions. [2021-11-20 06:44:54,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:44:54,036 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 221 transitions. [2021-11-20 06:44:54,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 06:44:54,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:54,037 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:44:54,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-20 06:44:54,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:44:54,250 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:44:54,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:54,250 INFO L85 PathProgramCache]: Analyzing trace with hash -2027972411, now seen corresponding path program 1 times [2021-11-20 06:44:54,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:44:54,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1054904099] [2021-11-20 06:44:54,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:54,251 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:44:54,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:44:54,252 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:44:54,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-20 06:44:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:54,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 06:44:54,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:44:54,700 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:44:54,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:44:55,073 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 06:44:55,073 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:44:55,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1054904099] [2021-11-20 06:44:55,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1054904099] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:44:55,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:44:55,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-11-20 06:44:55,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217488182] [2021-11-20 06:44:55,074 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:44:55,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:44:55,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:44:55,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:44:55,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:44:55,075 INFO L87 Difference]: Start difference. First operand 179 states and 221 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 06:44:56,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:56,010 INFO L93 Difference]: Finished difference Result 283 states and 332 transitions. [2021-11-20 06:44:56,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:44:56,011 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 36 [2021-11-20 06:44:56,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:56,013 INFO L225 Difference]: With dead ends: 283 [2021-11-20 06:44:56,013 INFO L226 Difference]: Without dead ends: 283 [2021-11-20 06:44:56,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2021-11-20 06:44:56,014 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 439 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:56,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 547 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:44:56,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-20 06:44:56,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 187. [2021-11-20 06:44:56,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 158 states have (on average 1.3354430379746836) internal successors, (211), 173 states have internal predecessors, (211), 7 states have call successors, (7), 4 states have call predecessors, (7), 7 states have return successors, (13), 9 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-20 06:44:56,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 231 transitions. [2021-11-20 06:44:56,023 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 231 transitions. Word has length 36 [2021-11-20 06:44:56,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:56,024 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 231 transitions. [2021-11-20 06:44:56,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 06:44:56,024 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 231 transitions. [2021-11-20 06:44:56,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 06:44:56,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:56,025 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:44:56,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-20 06:44:56,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:44:56,238 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:44:56,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:56,239 INFO L85 PathProgramCache]: Analyzing trace with hash -185148971, now seen corresponding path program 1 times [2021-11-20 06:44:56,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:44:56,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [930043827] [2021-11-20 06:44:56,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:56,239 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:44:56,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:44:56,240 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:44:56,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-20 06:44:56,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:56,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:44:56,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:44:56,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:44:56,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:44:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:44:56,944 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:44:56,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [930043827] [2021-11-20 06:44:56,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [930043827] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:44:56,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:44:56,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2021-11-20 06:44:56,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270741768] [2021-11-20 06:44:56,945 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:44:56,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:44:56,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:44:56,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:44:56,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:44:56,947 INFO L87 Difference]: Start difference. First operand 187 states and 231 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:44:57,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:57,479 INFO L93 Difference]: Finished difference Result 216 states and 255 transitions. [2021-11-20 06:44:57,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:44:57,487 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2021-11-20 06:44:57,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:57,489 INFO L225 Difference]: With dead ends: 216 [2021-11-20 06:44:57,489 INFO L226 Difference]: Without dead ends: 216 [2021-11-20 06:44:57,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:44:57,491 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 452 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:57,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 318 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:44:57,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-20 06:44:57,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 184. [2021-11-20 06:44:57,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 155 states have (on average 1.3096774193548386) internal successors, (203), 170 states have internal predecessors, (203), 7 states have call successors, (7), 4 states have call predecessors, (7), 7 states have return successors, (13), 9 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-20 06:44:57,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 223 transitions. [2021-11-20 06:44:57,500 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 223 transitions. Word has length 36 [2021-11-20 06:44:57,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:57,500 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 223 transitions. [2021-11-20 06:44:57,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:44:57,501 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 223 transitions. [2021-11-20 06:44:57,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 06:44:57,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:57,502 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:44:57,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-11-20 06:44:57,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:44:57,715 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:44:57,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:57,715 INFO L85 PathProgramCache]: Analyzing trace with hash 2145816479, now seen corresponding path program 1 times [2021-11-20 06:44:57,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:44:57,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2113849303] [2021-11-20 06:44:57,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:44:57,716 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:44:57,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:44:57,716 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:44:57,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-20 06:44:57,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:44:57,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 06:44:57,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:44:58,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:44:58,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:44:58,609 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:44:58,609 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:44:58,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2113849303] [2021-11-20 06:44:58,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2113849303] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:44:58,610 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:44:58,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-11-20 06:44:58,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727923030] [2021-11-20 06:44:58,610 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:44:58,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:44:58,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:44:58,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:44:58,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:44:58,611 INFO L87 Difference]: Start difference. First operand 184 states and 223 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:44:59,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:44:59,457 INFO L93 Difference]: Finished difference Result 206 states and 244 transitions. [2021-11-20 06:44:59,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:44:59,458 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 37 [2021-11-20 06:44:59,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:44:59,459 INFO L225 Difference]: With dead ends: 206 [2021-11-20 06:44:59,460 INFO L226 Difference]: Without dead ends: 206 [2021-11-20 06:44:59,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2021-11-20 06:44:59,461 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 429 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:44:59,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 373 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:44:59,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-20 06:44:59,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 198. [2021-11-20 06:44:59,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 169 states have (on average 1.2840236686390532) internal successors, (217), 183 states have internal predecessors, (217), 7 states have call successors, (7), 4 states have call predecessors, (7), 7 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-20 06:44:59,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 237 transitions. [2021-11-20 06:44:59,469 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 237 transitions. Word has length 37 [2021-11-20 06:44:59,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:44:59,470 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 237 transitions. [2021-11-20 06:44:59,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:44:59,470 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 237 transitions. [2021-11-20 06:44:59,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 06:44:59,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:44:59,471 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:44:59,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-20 06:44:59,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:44:59,683 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:44:59,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:44:59,684 INFO L85 PathProgramCache]: Analyzing trace with hash 731071653, now seen corresponding path program 2 times [2021-11-20 06:44:59,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:44:59,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1792837977] [2021-11-20 06:44:59,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:44:59,684 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:44:59,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:44:59,685 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:44:59,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-20 06:44:59,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:44:59,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:44:59,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-20 06:44:59,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:44:59,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:44:59,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:45:03,195 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:45:03,196 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 49 treesize of output 49 [2021-11-20 06:45:03,217 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 06:45:03,217 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 43 treesize of output 43 [2021-11-20 06:45:03,896 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:45:03,896 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 52 treesize of output 52 [2021-11-20 06:45:03,911 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 06:45:03,911 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 46 treesize of output 46 [2021-11-20 06:45:04,121 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:45:04,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:45:16,901 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_19| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_19| (_ BitVec 32)) (|v_ldv_malloc_#res.base_173| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_15| (_ BitVec 32))) (or (and (let ((.cse0 (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_19| (_ bv4 32)))) (bvule (bvadd .cse0 |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_15|) (bvadd .cse0 (_ bv4 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_15|))) (forall ((ldv_malloc_~size (_ BitVec 32))) (bvule (bvadd (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_19| (_ bv4 32)) (_ bv4 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_15|) (select (store |c_#length| |v_ldv_malloc_#res.base_173| ldv_malloc_~size) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_19|)))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_173|)))))) (exists ((|v_ldv_malloc_#res.base_172| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_172|)))) (or (exists ((v_ldv_malloc_~size_156 (_ BitVec 32))) (not (bvule (bvadd (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_19| (_ bv4 32)) (_ bv4 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_15|) (select (store |c_old(#length)| |v_ldv_malloc_#res.base_172| v_ldv_malloc_~size_156) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_19|)))) (not (let ((.cse1 (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_19| (_ bv4 32)))) (bvule (bvadd .cse1 |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_15|) (bvadd .cse1 (_ bv4 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_15|))))))))) is different from false [2021-11-20 06:45:19,229 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 06:45:19,230 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 46 treesize of output 45 [2021-11-20 06:45:33,551 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_20| (_ BitVec 32)) (|v_ldv_malloc_#res.base_172| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_20| (_ BitVec 32))) (or (exists ((|v_ldv_malloc_#res.base_172| (_ BitVec 32)) (|v_ldv_malloc_#res.base_176| (_ BitVec 32))) (and (or (exists ((v_ldv_malloc_~size_156 (_ BitVec 32)) (v_ldv_malloc_~size_160 (_ BitVec 32))) (not (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_20| (_ bv4 32))) (select (store (store |c_old(#length)| |v_ldv_malloc_#res.base_176| v_ldv_malloc_~size_160) |v_ldv_malloc_#res.base_172| v_ldv_malloc_~size_156) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_20|)))) (not (let ((.cse0 (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_20| (_ bv4 32)))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| .cse0) (bvadd (_ bv8 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| .cse0))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_176|)))))) (not (= |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_20| |v_ldv_malloc_#res.base_172|)))) (= |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_20| |v_ldv_malloc_#res.base_172|) (and (let ((.cse1 (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_20| (_ bv4 32)))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| .cse1) (bvadd (_ bv8 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| .cse1))) (forall ((v_ldv_malloc_~size_156 (_ BitVec 32))) (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_20| (_ bv4 32))) (select (store |c_#length| |v_ldv_malloc_#res.base_172| v_ldv_malloc_~size_156) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_20|)))))) is different from false [2021-11-20 06:45:48,870 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_20| (_ BitVec 32)) (|v_ldv_malloc_#res.base_172| (_ BitVec 32)) (|v_ldv_malloc_#res.base_177| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_20| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_177|))))) (exists ((|v_ldv_malloc_#res.base_172| (_ BitVec 32)) (|v_ldv_malloc_#res.base_176| (_ BitVec 32))) (and (or (exists ((v_ldv_malloc_~size_156 (_ BitVec 32)) (v_ldv_malloc_~size_160 (_ BitVec 32))) (not (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_20| (_ bv4 32))) (select (store (store |c_old(#length)| |v_ldv_malloc_#res.base_176| v_ldv_malloc_~size_160) |v_ldv_malloc_#res.base_172| v_ldv_malloc_~size_156) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_20|)))) (not (let ((.cse0 (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_20| (_ bv4 32)))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| .cse0) (bvadd (_ bv8 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| .cse0))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_176|)))))) (not (= |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_20| |v_ldv_malloc_#res.base_172|)))) (= |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_20| |v_ldv_malloc_#res.base_172|) (and (let ((.cse1 (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_20| (_ bv4 32)))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| .cse1) (bvadd (_ bv8 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| .cse1))) (forall ((v_ldv_malloc_~size_156 (_ BitVec 32)) (ldv_malloc_~size (_ BitVec 32))) (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_20| (_ bv4 32))) (select (store (store |c_#length| |v_ldv_malloc_#res.base_177| ldv_malloc_~size) |v_ldv_malloc_#res.base_172| v_ldv_malloc_~size_156) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_20|)))))) is different from false [2021-11-20 06:46:10,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 57 [2021-11-20 06:46:11,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 55 [2021-11-20 06:46:11,831 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-20 06:46:11,831 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:46:11,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1792837977] [2021-11-20 06:46:11,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1792837977] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:46:11,832 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:46:11,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-11-20 06:46:11,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671817052] [2021-11-20 06:46:11,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:46:11,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-20 06:46:11,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:46:11,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-20 06:46:11,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=988, Unknown=14, NotChecked=198, Total=1332 [2021-11-20 06:46:11,834 INFO L87 Difference]: Start difference. First operand 198 states and 237 transitions. Second operand has 37 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 06:46:19,355 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_20| (_ BitVec 32)) (|v_ldv_malloc_#res.base_172| (_ BitVec 32)) (|v_ldv_malloc_#res.base_177| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_20| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_177|))))) (exists ((|v_ldv_malloc_#res.base_172| (_ BitVec 32)) (|v_ldv_malloc_#res.base_176| (_ BitVec 32))) (and (or (exists ((v_ldv_malloc_~size_156 (_ BitVec 32)) (v_ldv_malloc_~size_160 (_ BitVec 32))) (not (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_20| (_ bv4 32))) (select (store (store |c_old(#length)| |v_ldv_malloc_#res.base_176| v_ldv_malloc_~size_160) |v_ldv_malloc_#res.base_172| v_ldv_malloc_~size_156) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_20|)))) (not (let ((.cse0 (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_20| (_ bv4 32)))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| .cse0) (bvadd (_ bv8 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| .cse0))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_176|)))))) (not (= |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_20| |v_ldv_malloc_#res.base_172|)))) (= |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_20| |v_ldv_malloc_#res.base_172|) (and (let ((.cse1 (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_20| (_ bv4 32)))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| .cse1) (bvadd (_ bv8 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| .cse1))) (forall ((v_ldv_malloc_~size_156 (_ BitVec 32)) (ldv_malloc_~size (_ BitVec 32))) (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_20| (_ bv4 32))) (select (store (store |c_#length| |v_ldv_malloc_#res.base_177| ldv_malloc_~size) |v_ldv_malloc_#res.base_172| v_ldv_malloc_~size_156) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_20|)))))) (= |c_old(#valid)| |c_#valid|) (= |c_#length| |c_old(#length)|) (forall ((|v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_19| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_19| (_ BitVec 32)) (|v_ldv_malloc_#res.base_173| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_15| (_ BitVec 32))) (or (and (let ((.cse2 (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_19| (_ bv4 32)))) (bvule (bvadd .cse2 |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_15|) (bvadd .cse2 (_ bv4 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_15|))) (forall ((ldv_malloc_~size (_ BitVec 32))) (bvule (bvadd (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_19| (_ bv4 32)) (_ bv4 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_15|) (select (store |c_#length| |v_ldv_malloc_#res.base_173| ldv_malloc_~size) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_19|)))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_173|)))))) (exists ((|v_ldv_malloc_#res.base_172| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_172|)))) (or (exists ((v_ldv_malloc_~size_156 (_ BitVec 32))) (not (bvule (bvadd (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_19| (_ bv4 32)) (_ bv4 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_15|) (select (store |c_old(#length)| |v_ldv_malloc_#res.base_172| v_ldv_malloc_~size_156) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_19|)))) (not (let ((.cse3 (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_19| (_ bv4 32)))) (bvule (bvadd .cse3 |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_15|) (bvadd .cse3 (_ bv4 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_15|)))))))))) is different from false [2021-11-20 06:46:26,802 WARN L227 SmtUtils]: Spent 7.29s on a formula simplification. DAG size of input: 51 DAG size of output: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:46:33,112 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_20| (_ BitVec 32)) (|v_ldv_malloc_#res.base_172| (_ BitVec 32)) (|v_ldv_malloc_#res.base_177| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_20| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_177|))))) (exists ((|v_ldv_malloc_#res.base_172| (_ BitVec 32)) (|v_ldv_malloc_#res.base_176| (_ BitVec 32))) (and (or (exists ((v_ldv_malloc_~size_156 (_ BitVec 32)) (v_ldv_malloc_~size_160 (_ BitVec 32))) (not (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_20| (_ bv4 32))) (select (store (store |c_old(#length)| |v_ldv_malloc_#res.base_176| v_ldv_malloc_~size_160) |v_ldv_malloc_#res.base_172| v_ldv_malloc_~size_156) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_20|)))) (not (let ((.cse0 (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_20| (_ bv4 32)))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| .cse0) (bvadd (_ bv8 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| .cse0))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_176|)))))) (not (= |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_20| |v_ldv_malloc_#res.base_172|)))) (= |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_20| |v_ldv_malloc_#res.base_172|) (and (let ((.cse1 (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_20| (_ bv4 32)))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| .cse1) (bvadd (_ bv8 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| .cse1))) (forall ((v_ldv_malloc_~size_156 (_ BitVec 32)) (ldv_malloc_~size (_ BitVec 32))) (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_20| (_ bv4 32))) (select (store (store |c_#length| |v_ldv_malloc_#res.base_177| ldv_malloc_~size) |v_ldv_malloc_#res.base_172| v_ldv_malloc_~size_156) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_20|)))))) (= |c_old(#valid)| |c_#valid|) (= c_ldv_malloc_~size |c_ldv_malloc_#in~size|) (= |c_#length| |c_old(#length)|) (forall ((|v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_19| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_19| (_ BitVec 32)) (|v_ldv_malloc_#res.base_173| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_15| (_ BitVec 32))) (or (and (let ((.cse2 (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_19| (_ bv4 32)))) (bvule (bvadd .cse2 |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_15|) (bvadd .cse2 (_ bv4 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_15|))) (forall ((ldv_malloc_~size (_ BitVec 32))) (bvule (bvadd (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_19| (_ bv4 32)) (_ bv4 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_15|) (select (store |c_#length| |v_ldv_malloc_#res.base_173| ldv_malloc_~size) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_19|)))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_173|)))))) (exists ((|v_ldv_malloc_#res.base_172| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_172|)))) (or (exists ((v_ldv_malloc_~size_156 (_ BitVec 32))) (not (bvule (bvadd (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_19| (_ bv4 32)) (_ bv4 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_15|) (select (store |c_old(#length)| |v_ldv_malloc_#res.base_172| v_ldv_malloc_~size_156) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_19|)))) (not (let ((.cse3 (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_19| (_ bv4 32)))) (bvule (bvadd .cse3 |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_15|) (bvadd .cse3 (_ bv4 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_15|)))))))))) is different from false [2021-11-20 06:46:35,144 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((ldv_malloc_~size (_ BitVec 32)) (|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |ldv_malloc_#res.base| ldv_malloc_~size) |c_#length|) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |ldv_malloc_#res.base|)))))))) (forall ((|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_20| (_ BitVec 32)) (|v_ldv_malloc_#res.base_172| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_20| (_ BitVec 32))) (or (exists ((|v_ldv_malloc_#res.base_172| (_ BitVec 32)) (|v_ldv_malloc_#res.base_176| (_ BitVec 32))) (and (or (exists ((v_ldv_malloc_~size_156 (_ BitVec 32)) (v_ldv_malloc_~size_160 (_ BitVec 32))) (not (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_20| (_ bv4 32))) (select (store (store |c_old(#length)| |v_ldv_malloc_#res.base_176| v_ldv_malloc_~size_160) |v_ldv_malloc_#res.base_172| v_ldv_malloc_~size_156) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_20|)))) (not (let ((.cse0 (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_20| (_ bv4 32)))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| .cse0) (bvadd (_ bv8 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| .cse0))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_176|)))))) (not (= |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_20| |v_ldv_malloc_#res.base_172|)))) (= |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_20| |v_ldv_malloc_#res.base_172|) (and (let ((.cse1 (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_20| (_ bv4 32)))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| .cse1) (bvadd (_ bv8 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| .cse1))) (forall ((v_ldv_malloc_~size_156 (_ BitVec 32))) (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_20| (_ bv4 32))) (select (store |c_#length| |v_ldv_malloc_#res.base_172| v_ldv_malloc_~size_156) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_20|)))))) (= (select |c_#length| |c_ldv_malloc_#res.base|) |c_ldv_malloc_#in~size|) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| |c_ldv_malloc_#res.base|))) (= |c_ldv_malloc_#res.offset| (_ bv0 32))) is different from false [2021-11-20 06:46:44,105 WARN L227 SmtUtils]: Spent 8.29s on a formula simplification that was a NOOP. DAG size: 34 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:46:46,149 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_20| (_ BitVec 32)) (|v_ldv_malloc_#res.base_172| (_ BitVec 32)) (|v_ldv_malloc_#res.base_177| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_20| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_177|))))) (exists ((|v_ldv_malloc_#res.base_172| (_ BitVec 32)) (|v_ldv_malloc_#res.base_176| (_ BitVec 32))) (and (or (exists ((v_ldv_malloc_~size_156 (_ BitVec 32)) (v_ldv_malloc_~size_160 (_ BitVec 32))) (not (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_20| (_ bv4 32))) (select (store (store |c_old(#length)| |v_ldv_malloc_#res.base_176| v_ldv_malloc_~size_160) |v_ldv_malloc_#res.base_172| v_ldv_malloc_~size_156) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_20|)))) (not (let ((.cse0 (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_20| (_ bv4 32)))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| .cse0) (bvadd (_ bv8 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| .cse0))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_176|)))))) (not (= |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_20| |v_ldv_malloc_#res.base_172|)))) (= |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_20| |v_ldv_malloc_#res.base_172|) (and (let ((.cse1 (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_20| (_ bv4 32)))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| .cse1) (bvadd (_ bv8 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| .cse1))) (forall ((v_ldv_malloc_~size_156 (_ BitVec 32)) (ldv_malloc_~size (_ BitVec 32))) (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_20| (_ bv4 32))) (select (store (store |c_#length| |v_ldv_malloc_#res.base_177| ldv_malloc_~size) |v_ldv_malloc_#res.base_172| v_ldv_malloc_~size_156) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_20|)))))) (= c_ldv_malloc_~size |c_ldv_malloc_#in~size|)) is different from false [2021-11-20 06:46:48,188 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_20| (_ BitVec 32)) (|v_ldv_malloc_#res.base_172| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_20| (_ BitVec 32))) (or (exists ((|v_ldv_malloc_#res.base_172| (_ BitVec 32)) (|v_ldv_malloc_#res.base_176| (_ BitVec 32))) (and (or (exists ((v_ldv_malloc_~size_156 (_ BitVec 32)) (v_ldv_malloc_~size_160 (_ BitVec 32))) (not (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_20| (_ bv4 32))) (select (store (store |c_old(#length)| |v_ldv_malloc_#res.base_176| v_ldv_malloc_~size_160) |v_ldv_malloc_#res.base_172| v_ldv_malloc_~size_156) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_20|)))) (not (let ((.cse0 (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_20| (_ bv4 32)))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| .cse0) (bvadd (_ bv8 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| .cse0))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_176|)))))) (not (= |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_20| |v_ldv_malloc_#res.base_172|)))) (= |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_20| |v_ldv_malloc_#res.base_172|) (and (let ((.cse1 (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_20| (_ bv4 32)))) (bvule (bvadd (_ bv4 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| .cse1) (bvadd (_ bv8 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| .cse1))) (forall ((v_ldv_malloc_~size_156 (_ BitVec 32))) (bvule (bvadd (_ bv8 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_16| (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_20| (_ bv4 32))) (select (store |c_#length| |v_ldv_malloc_#res.base_172| v_ldv_malloc_~size_156) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_20|)))))) (= (select |c_#length| |c_ldv_malloc_#res.base|) |c_ldv_malloc_#in~size|) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| |c_ldv_malloc_#res.base|))) (= |c_ldv_malloc_#res.offset| (_ bv0 32))) is different from false [2021-11-20 06:46:50,288 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_old(#valid)| |c_#valid|) (= |c_#length| |c_old(#length)|) (forall ((|v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_19| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_19| (_ BitVec 32)) (|v_ldv_malloc_#res.base_173| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_15| (_ BitVec 32))) (or (and (let ((.cse0 (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_19| (_ bv4 32)))) (bvule (bvadd .cse0 |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_15|) (bvadd .cse0 (_ bv4 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_15|))) (forall ((ldv_malloc_~size (_ BitVec 32))) (bvule (bvadd (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_19| (_ bv4 32)) (_ bv4 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_15|) (select (store |c_#length| |v_ldv_malloc_#res.base_173| ldv_malloc_~size) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_19|)))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_173|)))))) (exists ((|v_ldv_malloc_#res.base_172| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_172|)))) (or (exists ((v_ldv_malloc_~size_156 (_ BitVec 32))) (not (bvule (bvadd (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_19| (_ bv4 32)) (_ bv4 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_15|) (select (store |c_old(#length)| |v_ldv_malloc_#res.base_172| v_ldv_malloc_~size_156) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_19|)))) (not (let ((.cse1 (bvmul |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_19| (_ bv4 32)))) (bvule (bvadd .cse1 |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_15|) (bvadd .cse1 (_ bv4 32) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_15|)))))))))) is different from false [2021-11-20 06:47:44,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:47:44,707 INFO L93 Difference]: Finished difference Result 270 states and 314 transitions. [2021-11-20 06:47:44,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-20 06:47:44,708 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2021-11-20 06:47:44,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:47:44,709 INFO L225 Difference]: With dead ends: 270 [2021-11-20 06:47:44,709 INFO L226 Difference]: Without dead ends: 270 [2021-11-20 06:47:44,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 130.0s TimeCoverageRelationStatistics Valid=272, Invalid=2076, Unknown=40, NotChecked=918, Total=3306 [2021-11-20 06:47:44,711 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 113 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1007 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:47:44,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 1018 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 237 Invalid, 0 Unknown, 1007 Unchecked, 0.7s Time] [2021-11-20 06:47:44,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-11-20 06:47:44,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 251. [2021-11-20 06:47:44,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 208 states have (on average 1.2692307692307692) internal successors, (264), 227 states have internal predecessors, (264), 11 states have call successors, (11), 10 states have call predecessors, (11), 17 states have return successors, (21), 13 states have call predecessors, (21), 11 states have call successors, (21) [2021-11-20 06:47:44,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 296 transitions. [2021-11-20 06:47:44,720 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 296 transitions. Word has length 39 [2021-11-20 06:47:44,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:47:44,720 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 296 transitions. [2021-11-20 06:47:44,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 06:47:44,721 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 296 transitions. [2021-11-20 06:47:44,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-20 06:47:44,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:47:44,722 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:47:44,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-11-20 06:47:44,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:47:44,933 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:47:44,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:47:44,934 INFO L85 PathProgramCache]: Analyzing trace with hash -275846323, now seen corresponding path program 1 times [2021-11-20 06:47:44,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:47:44,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [791636569] [2021-11-20 06:47:44,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:47:44,934 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:47:44,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:47:44,935 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:47:44,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-20 06:47:45,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:45,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 06:47:45,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:47:45,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:47:45,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 06:47:45,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2021-11-20 06:47:45,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 06:47:45,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-11-20 06:47:45,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:47:45,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:47:46,019 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 23 [2021-11-20 06:47:46,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 46 [2021-11-20 06:47:46,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:47:46,210 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:47:46,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [791636569] [2021-11-20 06:47:46,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [791636569] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:47:46,211 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:47:46,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-11-20 06:47:46,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139230336] [2021-11-20 06:47:46,211 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:47:46,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 06:47:46,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:47:46,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 06:47:46,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:47:46,213 INFO L87 Difference]: Start difference. First operand 251 states and 296 transitions. Second operand has 17 states, 16 states have (on average 3.9375) internal successors, (63), 16 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:47:47,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:47:47,162 INFO L93 Difference]: Finished difference Result 280 states and 326 transitions. [2021-11-20 06:47:47,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:47:47,163 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.9375) internal successors, (63), 16 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 40 [2021-11-20 06:47:47,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:47:47,164 INFO L225 Difference]: With dead ends: 280 [2021-11-20 06:47:47,164 INFO L226 Difference]: Without dead ends: 280 [2021-11-20 06:47:47,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:47:47,165 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 69 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:47:47,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 379 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 255 Invalid, 0 Unknown, 47 Unchecked, 0.6s Time] [2021-11-20 06:47:47,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-11-20 06:47:47,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 271. [2021-11-20 06:47:47,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 228 states have (on average 1.25) internal successors, (285), 247 states have internal predecessors, (285), 11 states have call successors, (11), 10 states have call predecessors, (11), 17 states have return successors, (21), 13 states have call predecessors, (21), 11 states have call successors, (21) [2021-11-20 06:47:47,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 317 transitions. [2021-11-20 06:47:47,174 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 317 transitions. Word has length 40 [2021-11-20 06:47:47,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:47:47,174 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 317 transitions. [2021-11-20 06:47:47,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.9375) internal successors, (63), 16 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:47:47,175 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 317 transitions. [2021-11-20 06:47:47,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 06:47:47,176 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:47:47,176 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:47:47,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-20 06:47:47,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:47:47,387 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:47:47,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:47:47,388 INFO L85 PathProgramCache]: Analyzing trace with hash -72017103, now seen corresponding path program 1 times [2021-11-20 06:47:47,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:47:47,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2121962503] [2021-11-20 06:47:47,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:47:47,389 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:47:47,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:47:47,389 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:47:47,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-20 06:47:47,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:47:47,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:47:47,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:47:47,830 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:47:47,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:47:48,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-11-20 06:47:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:47:49,300 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:47:49,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2121962503] [2021-11-20 06:47:49,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2121962503] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:47:49,300 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:47:49,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-11-20 06:47:49,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388577444] [2021-11-20 06:47:49,300 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:47:49,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:47:49,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:47:49,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:47:49,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:47:49,301 INFO L87 Difference]: Start difference. First operand 271 states and 317 transitions. Second operand has 18 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 06:47:52,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:47:52,157 INFO L93 Difference]: Finished difference Result 341 states and 376 transitions. [2021-11-20 06:47:52,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:47:52,159 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 41 [2021-11-20 06:47:52,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:47:52,161 INFO L225 Difference]: With dead ends: 341 [2021-11-20 06:47:52,161 INFO L226 Difference]: Without dead ends: 341 [2021-11-20 06:47:52,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:47:52,162 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 383 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:47:52,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 900 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 369 Invalid, 0 Unknown, 46 Unchecked, 1.8s Time] [2021-11-20 06:47:52,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-11-20 06:47:52,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 268. [2021-11-20 06:47:52,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 226 states have (on average 1.2300884955752212) internal successors, (278), 244 states have internal predecessors, (278), 11 states have call successors, (11), 10 states have call predecessors, (11), 17 states have return successors, (21), 13 states have call predecessors, (21), 11 states have call successors, (21) [2021-11-20 06:47:52,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 310 transitions. [2021-11-20 06:47:52,171 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 310 transitions. Word has length 41 [2021-11-20 06:47:52,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:47:52,171 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 310 transitions. [2021-11-20 06:47:52,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 06:47:52,172 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 310 transitions. [2021-11-20 06:47:52,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-20 06:47:52,172 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:47:52,173 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:47:52,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-20 06:47:52,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:47:52,384 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:47:52,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:47:52,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1776836543, now seen corresponding path program 2 times [2021-11-20 06:47:52,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:47:52,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [560000311] [2021-11-20 06:47:52,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:47:52,384 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:47:52,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:47:52,385 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:47:52,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-20 06:47:52,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:47:52,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:47:52,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 06:47:52,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:47:52,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 06:47:52,648 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-20 06:47:52,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-20 06:47:53,130 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-20 06:47:53,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2021-11-20 06:47:53,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-11-20 06:47:53,244 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:47:53,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:47:55,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-11-20 06:48:00,263 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 23 treesize of output 21 [2021-11-20 06:48:00,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 74 [2021-11-20 06:48:00,421 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:48:00,421 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:48:00,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [560000311] [2021-11-20 06:48:00,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [560000311] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:48:00,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:48:00,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-11-20 06:48:00,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614764640] [2021-11-20 06:48:00,422 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:48:00,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 06:48:00,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:48:00,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 06:48:00,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=315, Unknown=3, NotChecked=0, Total=380 [2021-11-20 06:48:00,423 INFO L87 Difference]: Start difference. First operand 268 states and 310 transitions. Second operand has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:48:05,534 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 06:48:08,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:48:08,143 INFO L93 Difference]: Finished difference Result 303 states and 343 transitions. [2021-11-20 06:48:08,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 06:48:08,144 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 40 [2021-11-20 06:48:08,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:48:08,145 INFO L225 Difference]: With dead ends: 303 [2021-11-20 06:48:08,145 INFO L226 Difference]: Without dead ends: 303 [2021-11-20 06:48:08,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=224, Invalid=961, Unknown=5, NotChecked=0, Total=1190 [2021-11-20 06:48:08,146 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 373 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:48:08,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 756 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 500 Invalid, 1 Unknown, 45 Unchecked, 3.0s Time] [2021-11-20 06:48:08,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-20 06:48:08,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 268. [2021-11-20 06:48:08,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 226 states have (on average 1.2300884955752212) internal successors, (278), 244 states have internal predecessors, (278), 11 states have call successors, (11), 10 states have call predecessors, (11), 17 states have return successors, (21), 13 states have call predecessors, (21), 11 states have call successors, (21) [2021-11-20 06:48:08,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 310 transitions. [2021-11-20 06:48:08,156 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 310 transitions. Word has length 40 [2021-11-20 06:48:08,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:48:08,156 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 310 transitions. [2021-11-20 06:48:08,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:48:08,157 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 310 transitions. [2021-11-20 06:48:08,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-20 06:48:08,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:48:08,158 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:48:08,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-20 06:48:08,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:48:08,369 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:48:08,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:48:08,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1776836544, now seen corresponding path program 1 times [2021-11-20 06:48:08,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:48:08,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1187553052] [2021-11-20 06:48:08,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:48:08,370 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:48:08,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:48:08,371 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:48:08,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-20 06:48:08,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:48:08,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 06:48:08,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:48:08,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:48:09,548 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:48:09,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:48:11,643 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:48:11,644 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:48:11,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1187553052] [2021-11-20 06:48:11,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1187553052] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:48:11,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:48:11,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 23 [2021-11-20 06:48:11,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599917520] [2021-11-20 06:48:11,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:48:11,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 06:48:11,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:48:11,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 06:48:11,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-11-20 06:48:11,645 INFO L87 Difference]: Start difference. First operand 268 states and 310 transitions. Second operand has 24 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:48:12,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:48:12,400 INFO L93 Difference]: Finished difference Result 283 states and 326 transitions. [2021-11-20 06:48:12,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 06:48:12,401 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 40 [2021-11-20 06:48:12,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:48:12,403 INFO L225 Difference]: With dead ends: 283 [2021-11-20 06:48:12,403 INFO L226 Difference]: Without dead ends: 283 [2021-11-20 06:48:12,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-11-20 06:48:12,403 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 56 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:48:12,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 1023 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 134 Invalid, 0 Unknown, 168 Unchecked, 0.4s Time] [2021-11-20 06:48:12,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-11-20 06:48:12,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 268. [2021-11-20 06:48:12,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 226 states have (on average 1.2300884955752212) internal successors, (278), 244 states have internal predecessors, (278), 11 states have call successors, (11), 10 states have call predecessors, (11), 17 states have return successors, (21), 13 states have call predecessors, (21), 11 states have call successors, (21) [2021-11-20 06:48:12,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 310 transitions. [2021-11-20 06:48:12,419 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 310 transitions. Word has length 40 [2021-11-20 06:48:12,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:48:12,419 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 310 transitions. [2021-11-20 06:48:12,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 22 states have internal predecessors, (70), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:48:12,420 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 310 transitions. [2021-11-20 06:48:12,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 06:48:12,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:48:12,421 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:48:12,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-20 06:48:12,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:48:12,631 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:48:12,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:48:12,632 INFO L85 PathProgramCache]: Analyzing trace with hash 392679819, now seen corresponding path program 1 times [2021-11-20 06:48:12,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:48:12,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [297785911] [2021-11-20 06:48:12,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:48:12,633 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:48:12,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:48:12,634 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:48:12,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-20 06:48:12,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:48:12,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 06:48:12,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:48:12,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:48:12,923 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 06:48:12,923 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 26 treesize of output 33 [2021-11-20 06:48:13,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-11-20 06:48:13,244 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 31 treesize of output 19 [2021-11-20 06:48:13,328 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-11-20 06:48:13,329 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 31 treesize of output 34 [2021-11-20 06:48:13,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:48:13,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:48:19,592 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 58 treesize of output 54 [2021-11-20 06:48:22,007 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_alloc_17_#t~ret39#1.base_110| (_ BitVec 32))) (or (and (= (bvadd (bvmul (_ bv4 32) |c_ULTIMATE.start_alloc_17_~i~0#1|) |c_ULTIMATE.start_alloc_17_~array#1.offset|) |c_ULTIMATE.start_entry_point_~array~0#1.offset|) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ULTIMATE.start_alloc_17_#t~ret39#1.base_110| (_ bv0 1)) |c_ULTIMATE.start_entry_point_~array~0#1.base|)))))))))) (= |c_ULTIMATE.start_alloc_17_~array#1.base| |c_ULTIMATE.start_entry_point_~array~0#1.base|)) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_alloc_17_#t~ret39#1.base_110|))))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ULTIMATE.start_alloc_17_#t~ret39#1.base_110| (_ bv1 1)) |c_ULTIMATE.start_alloc_17_~array#1.base|)))))) (_ bv1 1)))))) is different from false [2021-11-20 06:48:47,563 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_22| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_26| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_22| (_ BitVec 32)) (|v_ldv_malloc_#res.base_219| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_24| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ldv_malloc_#res.base_219| (_ bv1 1)) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_24|)))))) (_ bv1 1)))) (exists ((|v_ULTIMATE.start_alloc_17_#t~ret39#1.base_110| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_alloc_17_#t~ret39#1.base_110|)))))))))))) (or (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_22| |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_24|)) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_ULTIMATE.start_alloc_17_#t~ret39#1.base_110| (_ bv0 1)) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_22|)))))))) (_ bv1 1)))) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (bvadd (bvmul (_ bv4 32) |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_26|) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_22|)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_ULTIMATE.start_alloc_17_#t~ret39#1.base_110| (_ bv1 1)) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_24|))))))) (_ bv1 1))))) (and (= |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (bvadd (bvmul (_ bv4 32) |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_26|) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_22|)) (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_22| |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_24|) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ldv_malloc_#res.base_219| (_ bv0 1)) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_22|))))) (_ bv1 1)))) (not (= (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_219|))))))) (_ bv0 1))))) is different from false [2021-11-20 06:48:49,569 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_22| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_26| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_22| (_ BitVec 32)) (|v_ldv_malloc_#res.base_219| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_24| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ldv_malloc_#res.base_219| (_ bv1 1)) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_24|)))))) (_ bv1 1)))) (exists ((|v_ULTIMATE.start_alloc_17_#t~ret39#1.base_110| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_alloc_17_#t~ret39#1.base_110|)))))))))))) (or (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_22| |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_24|)) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_ULTIMATE.start_alloc_17_#t~ret39#1.base_110| (_ bv0 1)) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_22|)))))))) (_ bv1 1)))) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (bvadd (bvmul (_ bv4 32) |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_26|) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_22|)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_ULTIMATE.start_alloc_17_#t~ret39#1.base_110| (_ bv1 1)) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_24|))))))) (_ bv1 1))))) (and (= |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (bvadd (bvmul (_ bv4 32) |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_26|) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_22|)) (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_22| |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_24|) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ldv_malloc_#res.base_219| (_ bv0 1)) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_22|))))) (_ bv1 1)))) (not (= (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_219|))))))) (_ bv0 1))))) is different from true [2021-11-20 06:48:54,638 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_22| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_26| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_22| (_ BitVec 32)) (|v_ldv_malloc_#res.base_219| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_24| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ldv_malloc_#res.base_219| (_ bv1 1)) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_24|)))))) (_ bv1 1)))) (exists ((|v_ULTIMATE.start_alloc_17_#t~ret39#1.base_110| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_alloc_17_#t~ret39#1.base_110|)))))))))))) (or (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_22| |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_24|)) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_ULTIMATE.start_alloc_17_#t~ret39#1.base_110| (_ bv0 1)) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_22|)))))))) (_ bv1 1)))) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (bvadd (bvmul (_ bv4 32) |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_26|) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_22|)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_ULTIMATE.start_alloc_17_#t~ret39#1.base_110| (_ bv1 1)) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_24|))))))) (_ bv1 1))))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_219|)))))))))) (and (= |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (bvadd (bvmul (_ bv4 32) |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_26|) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_22|)) (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_22| |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_24|) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ldv_malloc_#res.base_219| (_ bv0 1)) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_22|))))) (_ bv1 1)))))) is different from false [2021-11-20 06:48:56,681 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_22| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_26| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_22| (_ BitVec 32)) (|v_ldv_malloc_#res.base_219| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_24| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ldv_malloc_#res.base_219| (_ bv1 1)) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_24|)))))) (_ bv1 1)))) (exists ((|v_ULTIMATE.start_alloc_17_#t~ret39#1.base_110| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_alloc_17_#t~ret39#1.base_110|)))))))))))) (or (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_22| |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_24|)) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_ULTIMATE.start_alloc_17_#t~ret39#1.base_110| (_ bv0 1)) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_22|)))))))) (_ bv1 1)))) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (bvadd (bvmul (_ bv4 32) |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_26|) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_22|)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_ULTIMATE.start_alloc_17_#t~ret39#1.base_110| (_ bv1 1)) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_24|))))))) (_ bv1 1))))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_219|)))))))))) (and (= |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (bvadd (bvmul (_ bv4 32) |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_26|) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_22|)) (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_22| |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_24|) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ldv_malloc_#res.base_219| (_ bv0 1)) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_22|))))) (_ bv1 1)))))) is different from true [2021-11-20 06:48:56,840 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2021-11-20 06:48:56,840 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:48:56,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [297785911] [2021-11-20 06:48:56,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [297785911] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:48:56,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:48:56,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-11-20 06:48:56,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466959100] [2021-11-20 06:48:56,840 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:48:56,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 06:48:56,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:48:56,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 06:48:56,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=12, NotChecked=114, Total=506 [2021-11-20 06:48:56,841 INFO L87 Difference]: Start difference. First operand 268 states and 310 transitions. Second operand has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 19 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:48:59,065 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_22| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_26| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_22| (_ BitVec 32)) (|v_ldv_malloc_#res.base_219| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_24| (_ BitVec 32))) (or (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ldv_malloc_#res.base_219| (_ bv1 1)) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_24|)))))) (_ bv1 1)))) (exists ((|v_ULTIMATE.start_alloc_17_#t~ret39#1.base_110| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_alloc_17_#t~ret39#1.base_110|)))))))))))) (or (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_22| |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_24|)) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_ULTIMATE.start_alloc_17_#t~ret39#1.base_110| (_ bv0 1)) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_22|)))))))) (_ bv1 1)))) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (bvadd (bvmul (_ bv4 32) |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_26|) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_22|)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_ULTIMATE.start_alloc_17_#t~ret39#1.base_110| (_ bv1 1)) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_24|))))))) (_ bv1 1))))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |v_ldv_malloc_#res.base_219|)))))))))) (and (= |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_18| (bvadd (bvmul (_ bv4 32) |v_ULTIMATE.start_alloc_17_~i~0#1_BEFORE_CALL_26|) |v_ULTIMATE.start_alloc_17_~array#1.offset_BEFORE_CALL_22|)) (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_22| |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_24|) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ldv_malloc_#res.base_219| (_ bv0 1)) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_22|))))) (_ bv1 1)))))) (= |c_old(#valid)| |c_#valid|)) is different from false [2021-11-20 06:49:10,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:49:10,397 INFO L93 Difference]: Finished difference Result 302 states and 346 transitions. [2021-11-20 06:49:10,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 06:49:10,398 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 19 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 41 [2021-11-20 06:49:10,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:49:10,399 INFO L225 Difference]: With dead ends: 302 [2021-11-20 06:49:10,399 INFO L226 Difference]: Without dead ends: 302 [2021-11-20 06:49:10,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 46.6s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=16, NotChecked=196, Total=812 [2021-11-20 06:49:10,400 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 67 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 498 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:49:10,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 773 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 510 Invalid, 0 Unknown, 498 Unchecked, 1.0s Time] [2021-11-20 06:49:10,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-11-20 06:49:10,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 262. [2021-11-20 06:49:10,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 220 states have (on average 1.240909090909091) internal successors, (273), 238 states have internal predecessors, (273), 11 states have call successors, (11), 10 states have call predecessors, (11), 17 states have return successors, (21), 13 states have call predecessors, (21), 11 states have call successors, (21) [2021-11-20 06:49:10,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 305 transitions. [2021-11-20 06:49:10,408 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 305 transitions. Word has length 41 [2021-11-20 06:49:10,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:49:10,408 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 305 transitions. [2021-11-20 06:49:10,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 19 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:49:10,408 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 305 transitions. [2021-11-20 06:49:10,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 06:49:10,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:49:10,409 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:49:10,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-20 06:49:10,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:49:10,621 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:49:10,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:49:10,621 INFO L85 PathProgramCache]: Analyzing trace with hash -503073279, now seen corresponding path program 1 times [2021-11-20 06:49:10,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:49:10,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1979715522] [2021-11-20 06:49:10,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:49:10,622 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:49:10,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:49:10,622 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:49:10,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-20 06:49:10,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:10,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 06:49:10,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:49:10,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:49:11,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 06:49:11,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:49:11,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:49:12,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:49:12,832 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:49:12,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1979715522] [2021-11-20 06:49:12,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1979715522] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:49:12,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:49:12,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-11-20 06:49:12,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781794365] [2021-11-20 06:49:12,833 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:49:12,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 06:49:12,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:49:12,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 06:49:12,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-11-20 06:49:12,835 INFO L87 Difference]: Start difference. First operand 262 states and 305 transitions. Second operand has 29 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:49:15,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:49:15,611 INFO L93 Difference]: Finished difference Result 478 states and 525 transitions. [2021-11-20 06:49:15,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 06:49:15,612 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2021-11-20 06:49:15,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:49:15,615 INFO L225 Difference]: With dead ends: 478 [2021-11-20 06:49:15,615 INFO L226 Difference]: Without dead ends: 478 [2021-11-20 06:49:15,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=521, Invalid=2029, Unknown=0, NotChecked=0, Total=2550 [2021-11-20 06:49:15,617 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 1308 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1308 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:49:15,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1308 Valid, 1089 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 499 Invalid, 0 Unknown, 117 Unchecked, 1.2s Time] [2021-11-20 06:49:15,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-11-20 06:49:15,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 253. [2021-11-20 06:49:15,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 211 states have (on average 1.2322274881516588) internal successors, (260), 229 states have internal predecessors, (260), 11 states have call successors, (11), 10 states have call predecessors, (11), 17 states have return successors, (21), 13 states have call predecessors, (21), 11 states have call successors, (21) [2021-11-20 06:49:15,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 292 transitions. [2021-11-20 06:49:15,626 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 292 transitions. Word has length 41 [2021-11-20 06:49:15,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:49:15,627 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 292 transitions. [2021-11-20 06:49:15,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:49:15,627 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 292 transitions. [2021-11-20 06:49:15,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 06:49:15,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:49:15,628 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:49:15,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-20 06:49:15,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:49:15,840 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:49:15,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:49:15,842 INFO L85 PathProgramCache]: Analyzing trace with hash 2062437122, now seen corresponding path program 1 times [2021-11-20 06:49:15,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:49:15,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1694266110] [2021-11-20 06:49:15,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:49:15,843 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:49:15,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:49:15,844 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:49:15,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-20 06:49:15,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:15,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 06:49:15,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:49:16,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-20 06:49:16,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 06:49:16,442 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 06:49:16,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:49:16,787 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:49:16,787 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:49:16,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1694266110] [2021-11-20 06:49:16,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1694266110] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:49:16,787 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:49:16,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2021-11-20 06:49:16,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585404741] [2021-11-20 06:49:16,788 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:49:16,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:49:16,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:49:16,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:49:16,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:49:16,790 INFO L87 Difference]: Start difference. First operand 253 states and 292 transitions. Second operand has 18 states, 17 states have (on average 3.0) internal successors, (51), 15 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 06:49:18,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:49:18,677 INFO L93 Difference]: Finished difference Result 351 states and 382 transitions. [2021-11-20 06:49:18,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 06:49:18,678 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.0) internal successors, (51), 15 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 42 [2021-11-20 06:49:18,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:49:18,680 INFO L225 Difference]: With dead ends: 351 [2021-11-20 06:49:18,680 INFO L226 Difference]: Without dead ends: 351 [2021-11-20 06:49:18,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=211, Invalid=1271, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 06:49:18,681 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 387 mSDsluCounter, 1074 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:49:18,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 1168 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 474 Invalid, 0 Unknown, 41 Unchecked, 1.0s Time] [2021-11-20 06:49:18,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-11-20 06:49:18,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 261. [2021-11-20 06:49:18,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 217 states have (on average 1.2304147465437787) internal successors, (267), 236 states have internal predecessors, (267), 11 states have call successors, (11), 11 states have call predecessors, (11), 19 states have return successors, (21), 13 states have call predecessors, (21), 11 states have call successors, (21) [2021-11-20 06:49:18,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 299 transitions. [2021-11-20 06:49:18,690 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 299 transitions. Word has length 42 [2021-11-20 06:49:18,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:49:18,690 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 299 transitions. [2021-11-20 06:49:18,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.0) internal successors, (51), 15 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 06:49:18,690 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 299 transitions. [2021-11-20 06:49:18,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 06:49:18,692 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:49:18,692 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:49:18,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2021-11-20 06:49:18,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:49:18,905 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:49:18,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:49:18,905 INFO L85 PathProgramCache]: Analyzing trace with hash -752641937, now seen corresponding path program 1 times [2021-11-20 06:49:18,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:49:18,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1189042990] [2021-11-20 06:49:18,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:49:18,906 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:49:18,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:49:18,906 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:49:18,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-20 06:49:18,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:18,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 06:49:18,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:49:19,023 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 [2021-11-20 06:49:19,276 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 19 treesize of output 7 [2021-11-20 06:49:19,296 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:49:19,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:49:23,475 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 16 treesize of output 14 [2021-11-20 06:49:23,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-20 06:49:23,568 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:49:23,568 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:49:23,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1189042990] [2021-11-20 06:49:23,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1189042990] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:49:23,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:49:23,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-11-20 06:49:23,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559410901] [2021-11-20 06:49:23,568 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:49:23,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:49:23,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:49:23,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:49:23,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=124, Unknown=2, NotChecked=0, Total=156 [2021-11-20 06:49:23,569 INFO L87 Difference]: Start difference. First operand 261 states and 299 transitions. Second operand has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 06:49:24,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:49:24,354 INFO L93 Difference]: Finished difference Result 298 states and 333 transitions. [2021-11-20 06:49:24,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:49:24,355 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2021-11-20 06:49:24,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:49:24,356 INFO L225 Difference]: With dead ends: 298 [2021-11-20 06:49:24,356 INFO L226 Difference]: Without dead ends: 298 [2021-11-20 06:49:24,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=76, Invalid=302, Unknown=2, NotChecked=0, Total=380 [2021-11-20 06:49:24,357 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 103 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:49:24,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 746 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 271 Invalid, 0 Unknown, 16 Unchecked, 0.6s Time] [2021-11-20 06:49:24,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-11-20 06:49:24,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 261. [2021-11-20 06:49:24,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 217 states have (on average 1.2304147465437787) internal successors, (267), 236 states have internal predecessors, (267), 11 states have call successors, (11), 11 states have call predecessors, (11), 19 states have return successors, (21), 13 states have call predecessors, (21), 11 states have call successors, (21) [2021-11-20 06:49:24,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 299 transitions. [2021-11-20 06:49:24,365 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 299 transitions. Word has length 41 [2021-11-20 06:49:24,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:49:24,365 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 299 transitions. [2021-11-20 06:49:24,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 06:49:24,365 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 299 transitions. [2021-11-20 06:49:24,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 06:49:24,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:49:24,367 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:49:24,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2021-11-20 06:49:24,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:49:24,578 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:49:24,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:49:24,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1199661072, now seen corresponding path program 1 times [2021-11-20 06:49:24,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:49:24,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1409685230] [2021-11-20 06:49:24,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:49:24,579 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:49:24,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:49:24,580 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:49:24,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-20 06:49:24,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:49:24,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 06:49:24,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:49:24,886 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 11 treesize of output 7 [2021-11-20 06:49:24,999 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 06:49:24,999 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 29 treesize of output 25 [2021-11-20 06:49:25,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 06:49:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:49:25,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:49:25,848 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 22 [2021-11-20 06:49:25,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2021-11-20 06:49:46,535 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:49:46,535 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 106 treesize of output 106 [2021-11-20 06:49:48,722 WARN L860 $PredicateComparison]: unable to prove that (forall ((v_arrayElimCell_63 (_ BitVec 1)) (v_arrayElimCell_62 (_ BitVec 32)) (v_antiDerIndex_entry0_1 (_ BitVec 32))) (let ((.cse0 (bvneg (bvneg (bvneg (bvneg (bvneg v_arrayElimCell_63))))))) (or (= (_ bv0 1) (bvadd .cse0 (bvneg (bvneg (bvneg (bvneg (bvneg (select (store (store |c_#valid| (_ bv0 32) (_ bv0 1)) |c_ldv_malloc_#res.base| (_ bv0 1)) v_antiDerIndex_entry0_1)))))))) (exists ((|v_ULTIMATE.start_entry_point_#t~ret45#1.base_120| (_ BitVec 32)) (v_prenex_2 (_ BitVec 32)) (v_prenex_1 (_ BitVec 32))) (let ((.cse1 (bvneg (bvneg v_arrayElimCell_63))) (.cse2 (store |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret45#1.base_120| (_ bv1 1)))) (and (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg .cse1))) (bvneg (bvneg (bvneg (bvneg (select (store (store .cse2 v_prenex_1 (_ bv0 1)) |v_ULTIMATE.start_entry_point_#t~ret45#1.base_120| (_ bv0 1)) v_prenex_2)))))))) (not (= (_ bv0 1) (bvadd .cse1 (bvneg (bvneg (bvneg (select (store (store .cse2 (_ bv0 32) (_ bv0 1)) |v_ULTIMATE.start_entry_point_#t~ret45#1.base_120| (_ bv0 1)) v_prenex_2))))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_entry_point_#t~ret45#1.base_120|)))))))) (= (_ bv0 1) (bvadd (bvneg .cse0) (bvneg (bvneg (bvneg (bvneg (select (store (store |c_#valid| v_arrayElimCell_62 (_ bv0 1)) |c_ldv_malloc_#res.base| (_ bv0 1)) v_antiDerIndex_entry0_1)))))))))) is different from true [2021-11-20 06:50:21,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 2 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-20 06:50:21,150 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:50:21,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1409685230] [2021-11-20 06:50:21,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1409685230] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:50:21,150 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:50:21,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 25 [2021-11-20 06:50:21,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50961948] [2021-11-20 06:50:21,151 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:50:21,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 06:50:21,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:50:21,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 06:50:21,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=552, Unknown=17, NotChecked=48, Total=702 [2021-11-20 06:50:21,152 INFO L87 Difference]: Start difference. First operand 261 states and 299 transitions. Second operand has 27 states, 26 states have (on average 2.923076923076923) internal successors, (76), 24 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:50:41,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:41,893 INFO L93 Difference]: Finished difference Result 281 states and 318 transitions. [2021-11-20 06:50:41,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 06:50:41,894 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.923076923076923) internal successors, (76), 24 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 42 [2021-11-20 06:50:41,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:41,895 INFO L225 Difference]: With dead ends: 281 [2021-11-20 06:50:41,895 INFO L226 Difference]: Without dead ends: 260 [2021-11-20 06:50:41,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 74.6s TimeCoverageRelationStatistics Valid=218, Invalid=1321, Unknown=25, NotChecked=76, Total=1640 [2021-11-20 06:50:41,897 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 158 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 286 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:41,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 786 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 376 Invalid, 0 Unknown, 286 Unchecked, 0.8s Time] [2021-11-20 06:50:41,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-20 06:50:41,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 253. [2021-11-20 06:50:41,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 210 states have (on average 1.2285714285714286) internal successors, (258), 229 states have internal predecessors, (258), 11 states have call successors, (11), 11 states have call predecessors, (11), 18 states have return successors, (20), 12 states have call predecessors, (20), 11 states have call successors, (20) [2021-11-20 06:50:41,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 289 transitions. [2021-11-20 06:50:41,904 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 289 transitions. Word has length 42 [2021-11-20 06:50:41,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:41,904 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 289 transitions. [2021-11-20 06:50:41,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.923076923076923) internal successors, (76), 24 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:50:41,905 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 289 transitions. [2021-11-20 06:50:41,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 06:50:41,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:41,906 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:41,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:42,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:50:42,117 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:50:42,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:42,117 INFO L85 PathProgramCache]: Analyzing trace with hash -488958544, now seen corresponding path program 1 times [2021-11-20 06:50:42,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:50:42,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2033271836] [2021-11-20 06:50:42,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:42,118 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:50:42,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:50:42,119 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:50:42,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-20 06:50:42,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:42,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 06:50:42,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:42,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-20 06:50:43,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 06:50:43,449 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 06:50:43,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:50:43,972 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 06:50:43,972 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:50:43,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2033271836] [2021-11-20 06:50:43,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2033271836] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:50:43,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:50:43,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 22 [2021-11-20 06:50:43,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847670872] [2021-11-20 06:50:43,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:50:43,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 06:50:43,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:50:43,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 06:50:43,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:50:43,974 INFO L87 Difference]: Start difference. First operand 253 states and 289 transitions. Second operand has 23 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 20 states have internal predecessors, (65), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 06:50:44,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:44,422 INFO L93 Difference]: Finished difference Result 274 states and 310 transitions. [2021-11-20 06:50:44,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 06:50:44,423 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 20 states have internal predecessors, (65), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2021-11-20 06:50:44,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:44,425 INFO L225 Difference]: With dead ends: 274 [2021-11-20 06:50:44,425 INFO L226 Difference]: Without dead ends: 274 [2021-11-20 06:50:44,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-11-20 06:50:44,425 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 34 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:44,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 1024 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 188 Unchecked, 0.1s Time] [2021-11-20 06:50:44,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-20 06:50:44,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 255. [2021-11-20 06:50:44,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 212 states have (on average 1.2264150943396226) internal successors, (260), 231 states have internal predecessors, (260), 11 states have call successors, (11), 11 states have call predecessors, (11), 18 states have return successors, (20), 12 states have call predecessors, (20), 11 states have call successors, (20) [2021-11-20 06:50:44,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 291 transitions. [2021-11-20 06:50:44,432 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 291 transitions. Word has length 43 [2021-11-20 06:50:44,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:44,432 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 291 transitions. [2021-11-20 06:50:44,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 20 states have internal predecessors, (65), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 06:50:44,433 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 291 transitions. [2021-11-20 06:50:44,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 06:50:44,434 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:44,434 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:44,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2021-11-20 06:50:44,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:50:44,645 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:50:44,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:44,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1857063425, now seen corresponding path program 1 times [2021-11-20 06:50:44,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:50:44,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1930202703] [2021-11-20 06:50:44,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:44,646 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:50:44,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:50:44,646 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:50:44,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-20 06:50:44,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:44,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:50:44,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:44,821 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 [2021-11-20 06:50:45,200 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 19 treesize of output 7 [2021-11-20 06:50:45,236 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:50:45,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:50:47,520 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 16 treesize of output 14 [2021-11-20 06:50:47,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-20 06:50:47,674 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:50:47,675 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:50:47,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1930202703] [2021-11-20 06:50:47,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1930202703] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:50:47,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:50:47,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-11-20 06:50:47,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608101667] [2021-11-20 06:50:47,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:50:47,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:50:47,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:50:47,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:50:47,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=188, Unknown=1, NotChecked=0, Total=240 [2021-11-20 06:50:47,676 INFO L87 Difference]: Start difference. First operand 255 states and 291 transitions. Second operand has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 16 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 06:50:48,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:48,856 INFO L93 Difference]: Finished difference Result 284 states and 318 transitions. [2021-11-20 06:50:48,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:50:48,857 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 16 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 42 [2021-11-20 06:50:48,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:48,858 INFO L225 Difference]: With dead ends: 284 [2021-11-20 06:50:48,858 INFO L226 Difference]: Without dead ends: 284 [2021-11-20 06:50:48,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=120, Invalid=431, Unknown=1, NotChecked=0, Total=552 [2021-11-20 06:50:48,859 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 130 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:48,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 628 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 398 Invalid, 0 Unknown, 37 Unchecked, 0.8s Time] [2021-11-20 06:50:48,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-11-20 06:50:48,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 260. [2021-11-20 06:50:48,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 217 states have (on average 1.2211981566820276) internal successors, (265), 236 states have internal predecessors, (265), 11 states have call successors, (11), 11 states have call predecessors, (11), 18 states have return successors, (20), 12 states have call predecessors, (20), 11 states have call successors, (20) [2021-11-20 06:50:48,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 296 transitions. [2021-11-20 06:50:48,866 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 296 transitions. Word has length 42 [2021-11-20 06:50:48,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:48,866 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 296 transitions. [2021-11-20 06:50:48,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 16 states have internal predecessors, (68), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 06:50:48,867 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 296 transitions. [2021-11-20 06:50:48,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 06:50:48,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:48,868 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:48,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:49,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:50:49,078 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 16 more)] === [2021-11-20 06:50:49,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:49,080 INFO L85 PathProgramCache]: Analyzing trace with hash -591810866, now seen corresponding path program 1 times [2021-11-20 06:50:49,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:50:49,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518936409] [2021-11-20 06:50:49,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:49,080 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:50:49,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:50:49,081 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:50:49,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9fc962f-ae86-4dc4-a349-8c0f703d8738/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-20 06:50:49,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:49,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-20 06:50:49,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:49,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-20 06:50:49,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-20 06:50:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:50:54,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:50:54,754 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 120 treesize of output 112 [2021-11-20 06:51:09,250 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:51:09,251 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 264 treesize of output 264