./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test14_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_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/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_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test14_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/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_53bf410d-07da-477b-9c0c-d75a257c0c71/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 d789cb2558e3de4d1d16c03a2a21714577a96d35a26f84712733ec2a50aa0d89 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:21:16,001 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:21:16,003 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:21:16,058 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:21:16,059 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:21:16,064 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:21:16,066 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:21:16,070 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:21:16,072 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:21:16,077 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:21:16,079 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:21:16,080 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:21:16,081 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:21:16,084 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:21:16,086 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:21:16,090 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:21:16,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:21:16,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:21:16,095 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:21:16,103 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:21:16,105 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:21:16,106 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:21:16,110 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:21:16,111 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:21:16,120 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:21:16,120 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:21:16,121 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:21:16,123 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:21:16,123 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:21:16,125 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:21:16,126 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:21:16,127 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:21:16,129 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:21:16,130 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:21:16,132 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:21:16,132 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:21:16,133 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:21:16,133 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:21:16,133 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:21:16,134 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:21:16,135 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:21:16,136 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-20 06:21:16,182 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:21:16,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:21:16,182 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:21:16,183 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:21:16,183 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:21:16,184 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:21:16,184 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:21:16,185 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:21:16,185 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:21:16,185 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:21:16,186 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:21:16,186 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 06:21:16,188 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:21:16,188 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:21:16,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:21:16,188 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 06:21:16,189 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 06:21:16,189 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 06:21:16,189 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:21:16,189 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 06:21:16,190 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:21:16,190 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:21:16,190 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:21:16,191 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:21:16,191 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:21:16,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:21:16,192 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:21:16,192 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:21:16,193 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:21:16,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:21:16,193 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:21:16,194 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_53bf410d-07da-477b-9c0c-d75a257c0c71/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d789cb2558e3de4d1d16c03a2a21714577a96d35a26f84712733ec2a50aa0d89 [2021-11-20 06:21:16,519 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:21:16,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:21:16,548 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:21:16,550 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:21:16,550 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:21:16,552 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/ldv-memsafety/memleaks_test14_2.i [2021-11-20 06:21:16,624 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/data/7129dcf98/e720a40c3d6d4dd29301847d13338df1/FLAG50ce33999 [2021-11-20 06:21:17,228 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:21:17,229 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/sv-benchmarks/c/ldv-memsafety/memleaks_test14_2.i [2021-11-20 06:21:17,243 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/data/7129dcf98/e720a40c3d6d4dd29301847d13338df1/FLAG50ce33999 [2021-11-20 06:21:17,496 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/data/7129dcf98/e720a40c3d6d4dd29301847d13338df1 [2021-11-20 06:21:17,500 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:21:17,502 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:21:17,506 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:21:17,506 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:21:17,512 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:21:17,513 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:21:17" (1/1) ... [2021-11-20 06:21:17,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77618248 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:21:17, skipping insertion in model container [2021-11-20 06:21:17,515 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:21:17" (1/1) ... [2021-11-20 06:21:17,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:21:17,587 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:21:17,998 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:21:18,033 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 06:21:18,033 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6328192b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:21:18, skipping insertion in model container [2021-11-20 06:21:18,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:21:18,034 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-20 06:21:18,037 INFO L158 Benchmark]: Toolchain (without parser) took 532.61ms. Allocated memory is still 104.9MB. Free memory was 73.6MB in the beginning and 75.3MB in the end (delta: -1.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-20 06:21:18,037 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 104.9MB. Free memory is still 58.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:21:18,039 INFO L158 Benchmark]: CACSL2BoogieTranslator took 528.14ms. Allocated memory is still 104.9MB. Free memory was 73.4MB in the beginning and 75.3MB in the end (delta: -1.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-20 06:21:18,041 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 104.9MB. Free memory is still 58.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 528.14ms. Allocated memory is still 104.9MB. Free memory was 73.4MB in the beginning and 75.3MB in the end (delta: -1.9MB). Peak memory consumption was 6.3MB. 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_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/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_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test14_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/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_53bf410d-07da-477b-9c0c-d75a257c0c71/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 d789cb2558e3de4d1d16c03a2a21714577a96d35a26f84712733ec2a50aa0d89 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:21:20,225 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:21:20,229 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:21:20,283 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:21:20,284 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:21:20,289 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:21:20,290 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:21:20,297 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:21:20,300 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:21:20,305 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:21:20,307 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:21:20,309 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:21:20,309 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:21:20,312 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:21:20,314 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:21:20,318 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:21:20,319 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:21:20,320 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:21:20,328 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:21:20,331 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:21:20,333 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:21:20,334 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:21:20,335 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:21:20,336 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:21:20,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:21:20,340 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:21:20,341 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:21:20,342 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:21:20,342 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:21:20,344 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:21:20,344 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:21:20,345 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:21:20,346 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:21:20,347 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:21:20,348 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:21:20,348 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:21:20,349 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:21:20,349 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:21:20,349 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:21:20,350 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:21:20,351 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:21:20,352 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-20 06:21:20,377 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:21:20,378 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:21:20,378 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:21:20,378 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:21:20,379 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:21:20,379 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:21:20,380 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:21:20,380 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:21:20,381 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:21:20,381 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:21:20,381 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:21:20,382 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 06:21:20,382 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:21:20,382 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:21:20,382 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:21:20,383 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 06:21:20,383 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 06:21:20,383 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 06:21:20,384 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:21:20,384 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 06:21:20,384 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 06:21:20,384 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 06:21:20,385 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:21:20,385 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:21:20,385 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:21:20,386 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:21:20,386 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:21:20,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:21:20,387 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:21:20,387 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:21:20,387 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-20 06:21:20,388 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 06:21:20,388 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:21:20,388 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 06:21:20,388 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_53bf410d-07da-477b-9c0c-d75a257c0c71/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d789cb2558e3de4d1d16c03a2a21714577a96d35a26f84712733ec2a50aa0d89 [2021-11-20 06:21:20,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:21:20,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:21:20,740 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:21:20,741 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:21:20,742 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:21:20,743 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/ldv-memsafety/memleaks_test14_2.i [2021-11-20 06:21:20,806 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/data/2389c2ed3/3eaa51ba7d5547ada2037f2feb359b46/FLAG572fc84db [2021-11-20 06:21:21,457 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:21:21,458 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/sv-benchmarks/c/ldv-memsafety/memleaks_test14_2.i [2021-11-20 06:21:21,481 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/data/2389c2ed3/3eaa51ba7d5547ada2037f2feb359b46/FLAG572fc84db [2021-11-20 06:21:21,677 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/data/2389c2ed3/3eaa51ba7d5547ada2037f2feb359b46 [2021-11-20 06:21:21,681 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:21:21,683 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:21:21,686 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:21:21,687 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:21:21,691 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:21:21,692 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:21:21" (1/1) ... [2021-11-20 06:21:21,694 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@731ebe12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:21:21, skipping insertion in model container [2021-11-20 06:21:21,695 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:21:21" (1/1) ... [2021-11-20 06:21:21,702 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:21:21,775 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:21:22,324 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:21:22,340 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-20 06:21:22,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:21:22,404 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:21:22,412 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:21:22,479 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:21:22,539 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:21:22,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:21:22 WrapperNode [2021-11-20 06:21:22,540 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:21:22,541 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:21:22,541 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:21:22,542 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:21:22,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:21:22" (1/1) ... [2021-11-20 06:21:22,572 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:21:22" (1/1) ... [2021-11-20 06:21:22,597 INFO L137 Inliner]: procedures = 168, calls = 79, calls flagged for inlining = 21, calls inlined = 6, statements flattened = 55 [2021-11-20 06:21:22,598 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:21:22,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:21:22,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:21:22,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:21:22,608 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:21:22" (1/1) ... [2021-11-20 06:21:22,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:21:22" (1/1) ... [2021-11-20 06:21:22,626 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:21:22" (1/1) ... [2021-11-20 06:21:22,628 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:21:22" (1/1) ... [2021-11-20 06:21:22,640 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:21:22" (1/1) ... [2021-11-20 06:21:22,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:21:22" (1/1) ... [2021-11-20 06:21:22,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:21:22" (1/1) ... [2021-11-20 06:21:22,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:21:22,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:21:22,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:21:22,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:21:22,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:21:22" (1/1) ... [2021-11-20 06:21:22,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:21:22,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:21:22,702 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:21:22,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:21:22,749 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2021-11-20 06:21:22,750 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2021-11-20 06:21:22,750 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-20 06:21:22,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-20 06:21:22,750 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_add [2021-11-20 06:21:22,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_add [2021-11-20 06:21:22,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 06:21:22,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:21:22,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:21:22,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 06:21:22,752 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 06:21:22,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:21:22,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 06:21:22,752 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_del [2021-11-20 06:21:22,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_del [2021-11-20 06:21:22,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:21:22,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:21:22,881 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:21:22,882 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:21:23,293 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:21:23,300 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:21:23,300 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:21:23,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:21:23 BoogieIcfgContainer [2021-11-20 06:21:23,305 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:21:23,308 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:21:23,308 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:21:23,311 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:21:23,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:21:21" (1/3) ... [2021-11-20 06:21:23,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76dac255 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:21:23, skipping insertion in model container [2021-11-20 06:21:23,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:21:22" (2/3) ... [2021-11-20 06:21:23,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76dac255 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:21:23, skipping insertion in model container [2021-11-20 06:21:23,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:21:23" (3/3) ... [2021-11-20 06:21:23,314 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test14_2.i [2021-11-20 06:21:23,322 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:21:23,322 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2021-11-20 06:21:23,391 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:21:23,409 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 06:21:23,416 INFO L340 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2021-11-20 06:21:23,434 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 38 states have (on average 1.763157894736842) internal successors, (67), 64 states have internal predecessors, (67), 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 06:21:23,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 06:21:23,442 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:21:23,443 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:21:23,443 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_list_addErr0REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 06:21:23,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:21:23,449 INFO L85 PathProgramCache]: Analyzing trace with hash 225826608, now seen corresponding path program 1 times [2021-11-20 06:21:23,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:21:23,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [343315648] [2021-11-20 06:21:23,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:21:23,462 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:21:23,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:21:23,470 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:21:23,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 06:21:23,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:23,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:21:23,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:21:23,782 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 06:21:23,888 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-20 06:21:23,889 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 15 treesize of output 20 [2021-11-20 06:21:23,963 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 06:21:23,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:21:24,286 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 06:21:24,287 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:21:24,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [343315648] [2021-11-20 06:21:24,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [343315648] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:21:24,288 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:21:24,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 7 [2021-11-20 06:21:24,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956788153] [2021-11-20 06:21:24,291 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:21:24,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:21:24,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:21:24,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:21:24,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:21:24,323 INFO L87 Difference]: Start difference. First operand has 72 states, 38 states have (on average 1.763157894736842) internal successors, (67), 64 states have internal predecessors, (67), 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) Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:21:24,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:21:24,642 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2021-11-20 06:21:24,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:21:24,645 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 12 [2021-11-20 06:21:24,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:21:24,656 INFO L225 Difference]: With dead ends: 73 [2021-11-20 06:21:24,656 INFO L226 Difference]: Without dead ends: 71 [2021-11-20 06:21:24,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:21:24,672 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 29 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:21:24,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 168 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 112 Invalid, 0 Unknown, 55 Unchecked, 0.3s Time] [2021-11-20 06:21:24,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-20 06:21:24,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2021-11-20 06:21:24,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 61 states have internal predecessors, (63), 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 06:21:24,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2021-11-20 06:21:24,709 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 12 [2021-11-20 06:21:24,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:21:24,710 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2021-11-20 06:21:24,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:21:24,710 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2021-11-20 06:21:24,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 06:21:24,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:21:24,711 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:21:24,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:21:24,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:21:24,922 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_list_addErr1REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 06:21:24,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:21:24,923 INFO L85 PathProgramCache]: Analyzing trace with hash 225826609, now seen corresponding path program 1 times [2021-11-20 06:21:24,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:21:24,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [420900677] [2021-11-20 06:21:24,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:21:24,927 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:21:24,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:21:24,930 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:21:24,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 06:21:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:25,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 06:21:25,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:21:25,055 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 06:21:25,060 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 06:21:27,262 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:21:27,262 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 29 treesize of output 31 [2021-11-20 06:21:27,275 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 06:21:27,276 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 23 treesize of output 23 [2021-11-20 06:21:27,401 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 06:21:27,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:21:37,244 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 06:21:37,244 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:21:37,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [420900677] [2021-11-20 06:21:37,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [420900677] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:21:37,247 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:21:37,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-11-20 06:21:37,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989941702] [2021-11-20 06:21:37,254 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:21:37,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:21:37,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:21:37,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:21:37,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=145, Unknown=4, NotChecked=0, Total=182 [2021-11-20 06:21:37,259 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 14 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:21:38,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:21:38,083 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2021-11-20 06:21:38,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:21:38,084 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 12 [2021-11-20 06:21:38,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:21:38,086 INFO L225 Difference]: With dead ends: 90 [2021-11-20 06:21:38,086 INFO L226 Difference]: Without dead ends: 90 [2021-11-20 06:21:38,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=39, Invalid=167, Unknown=4, NotChecked=0, Total=210 [2021-11-20 06:21:38,088 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 58 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:21:38,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 313 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 216 Invalid, 0 Unknown, 178 Unchecked, 0.7s Time] [2021-11-20 06:21:38,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-20 06:21:38,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 68. [2021-11-20 06:21:38,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 60 states have internal predecessors, (62), 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 06:21:38,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2021-11-20 06:21:38,101 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 12 [2021-11-20 06:21:38,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:21:38,102 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2021-11-20 06:21:38,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:21:38,103 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2021-11-20 06:21:38,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 06:21:38,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:21:38,103 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:21:38,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:21:38,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:21:38,321 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 06:21:38,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:21:38,321 INFO L85 PathProgramCache]: Analyzing trace with hash 838569493, now seen corresponding path program 1 times [2021-11-20 06:21:38,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:21:38,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572356285] [2021-11-20 06:21:38,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:21:38,322 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:21:38,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:21:38,323 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:21:38,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 06:21:38,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:38,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:21:38,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:21:38,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:21:38,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:21:38,527 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 06:21:38,528 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:21:38,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [572356285] [2021-11-20 06:21:38,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [572356285] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:21:38,528 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:21:38,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 06:21:38,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689713433] [2021-11-20 06:21:38,529 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:21:38,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:21:38,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:21:38,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:21:38,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:21:38,530 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 06:21:38,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:21:38,561 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2021-11-20 06:21:38,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:21:38,562 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 11 [2021-11-20 06:21:38,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:21:38,566 INFO L225 Difference]: With dead ends: 93 [2021-11-20 06:21:38,569 INFO L226 Difference]: Without dead ends: 93 [2021-11-20 06:21:38,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 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 06:21:38,570 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 20 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:21:38,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 334 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:21:38,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-20 06:21:38,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 72. [2021-11-20 06:21:38,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 40 states have (on average 1.625) internal successors, (65), 63 states have internal predecessors, (65), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-20 06:21:38,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2021-11-20 06:21:38,595 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 11 [2021-11-20 06:21:38,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:21:38,595 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2021-11-20 06:21:38,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 06:21:38,596 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2021-11-20 06:21:38,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 06:21:38,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:21:38,596 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:21:38,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:21:38,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:21:38,797 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 06:21:38,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:21:38,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1726073174, now seen corresponding path program 1 times [2021-11-20 06:21:38,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:21:38,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [533407115] [2021-11-20 06:21:38,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:21:38,799 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:21:38,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:21:38,800 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:21:38,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 06:21:38,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:38,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:21:38,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:21:38,854 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 06:21:38,920 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 06:21:38,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:21:39,029 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 06:21:39,030 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:21:39,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [533407115] [2021-11-20 06:21:39,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [533407115] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:21:39,031 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:21:39,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-20 06:21:39,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141890452] [2021-11-20 06:21:39,031 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:21:39,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:21:39,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:21:39,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:21:39,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:21:39,033 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 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 06:21:39,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:21:39,424 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2021-11-20 06:21:39,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:21:39,425 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 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 11 [2021-11-20 06:21:39,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:21:39,426 INFO L225 Difference]: With dead ends: 89 [2021-11-20 06:21:39,427 INFO L226 Difference]: Without dead ends: 89 [2021-11-20 06:21:39,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:21:39,428 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 76 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:21:39,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 101 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 0 Unknown, 28 Unchecked, 0.4s Time] [2021-11-20 06:21:39,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-20 06:21:39,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 75. [2021-11-20 06:21:39,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 42 states have (on average 1.619047619047619) internal successors, (68), 65 states have internal predecessors, (68), 5 states have call successors, (5), 4 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 06:21:39,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2021-11-20 06:21:39,438 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 11 [2021-11-20 06:21:39,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:21:39,438 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2021-11-20 06:21:39,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 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 06:21:39,439 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2021-11-20 06:21:39,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 06:21:39,439 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:21:39,440 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:21:39,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:21:39,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:21:39,651 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 06:21:39,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:21:39,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1726073175, now seen corresponding path program 1 times [2021-11-20 06:21:39,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:21:39,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [615855634] [2021-11-20 06:21:39,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:21:39,652 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:21:39,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:21:39,655 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:21:39,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 06:21:39,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:39,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:21:39,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:21:39,726 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 06:21:39,822 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 06:21:39,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:21:40,182 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 06:21:40,182 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:21:40,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [615855634] [2021-11-20 06:21:40,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [615855634] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:21:40,183 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:21:40,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-20 06:21:40,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609499855] [2021-11-20 06:21:40,183 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:21:40,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:21:40,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:21:40,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:21:40,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:21:40,185 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 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 06:21:40,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:21:40,969 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2021-11-20 06:21:40,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:21:40,971 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 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 11 [2021-11-20 06:21:40,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:21:40,972 INFO L225 Difference]: With dead ends: 91 [2021-11-20 06:21:40,973 INFO L226 Difference]: Without dead ends: 91 [2021-11-20 06:21:40,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:21:40,974 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 79 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:21:40,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 141 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 262 Invalid, 0 Unknown, 18 Unchecked, 0.8s Time] [2021-11-20 06:21:40,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-20 06:21:40,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 75. [2021-11-20 06:21:40,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 65 states have internal predecessors, (67), 5 states have call successors, (5), 4 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 06:21:40,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2021-11-20 06:21:40,982 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 11 [2021-11-20 06:21:40,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:21:40,983 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2021-11-20 06:21:40,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 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 06:21:40,983 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2021-11-20 06:21:40,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 06:21:40,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:21:40,984 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:21:40,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:21:41,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:21:41,195 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __ldv_list_addErr0REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 06:21:41,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:21:41,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1681752525, now seen corresponding path program 1 times [2021-11-20 06:21:41,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:21:41,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556220338] [2021-11-20 06:21:41,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:21:41,197 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:21:41,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:21:41,198 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:21:41,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 06:21:41,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:41,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 06:21:41,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:21:41,407 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 22 treesize of output 14 [2021-11-20 06:21:41,471 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 06:21:41,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:21:41,532 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-20 06:21:41,532 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 06:21:41,577 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 06:21:41,577 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:21:41,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [556220338] [2021-11-20 06:21:41,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [556220338] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:21:41,578 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:21:41,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [] total 8 [2021-11-20 06:21:41,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153429403] [2021-11-20 06:21:41,578 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:21:41,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:21:41,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:21:41,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:21:41,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:21:41,581 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:21:42,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:21:42,014 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2021-11-20 06:21:42,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:21:42,014 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2021-11-20 06:21:42,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:21:42,015 INFO L225 Difference]: With dead ends: 87 [2021-11-20 06:21:42,015 INFO L226 Difference]: Without dead ends: 87 [2021-11-20 06:21:42,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:21:42,017 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 44 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:21:42,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 322 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 158 Invalid, 0 Unknown, 26 Unchecked, 0.4s Time] [2021-11-20 06:21:42,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-20 06:21:42,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 74. [2021-11-20 06:21:42,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 64 states have internal predecessors, (66), 5 states have call successors, (5), 4 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 06:21:42,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2021-11-20 06:21:42,024 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 15 [2021-11-20 06:21:42,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:21:42,025 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2021-11-20 06:21:42,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:21:42,025 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2021-11-20 06:21:42,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 06:21:42,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:21:42,026 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:21:42,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:21:42,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:21:42,226 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __ldv_list_addErr1REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 06:21:42,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:21:42,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1681752526, now seen corresponding path program 1 times [2021-11-20 06:21:42,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:21:42,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1946406581] [2021-11-20 06:21:42,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:21:42,228 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:21:42,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:21:42,229 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:21:42,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 06:21:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:42,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-20 06:21:42,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:21:42,320 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 06:21:42,329 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 06:21:42,374 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 26 [2021-11-20 06:21:42,378 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 23 treesize of output 21 [2021-11-20 06:21:44,568 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:21:44,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2021-11-20 06:21:44,583 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 06:21:44,584 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 19 treesize of output 19 [2021-11-20 06:21:44,826 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 34 treesize of output 26 [2021-11-20 06:21:44,829 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 06:21:44,950 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 06:21:44,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:21:52,422 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_alloc_14_~list#1.base_BEFORE_CALL_12| (_ BitVec 32)) (|v_ULTIMATE.start_alloc_14_~list#1.offset_BEFORE_CALL_9| (_ BitVec 32)) (|v_ldv_malloc_#res.base_29| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ldv_malloc_#res.base_29|))) (exists ((|v_ldv_malloc_#res.base_28| (_ BitVec 32))) (and (or (not (let ((.cse0 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_alloc_14_~list#1.base_BEFORE_CALL_12|) |v_ULTIMATE.start_alloc_14_~list#1.offset_BEFORE_CALL_9|))) (bvule (bvadd .cse0 (_ bv4 32)) (bvadd .cse0 (_ bv8 32))))) (exists ((v_ldv_malloc_~size_27 (_ BitVec 32))) (not (bvule (bvadd (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_alloc_14_~list#1.base_BEFORE_CALL_12|) |v_ULTIMATE.start_alloc_14_~list#1.offset_BEFORE_CALL_9|) (_ bv8 32)) (select (store |c_old(#length)| |v_ldv_malloc_#res.base_28| v_ldv_malloc_~size_27) (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_alloc_14_~list#1.base_BEFORE_CALL_12|) |v_ULTIMATE.start_alloc_14_~list#1.offset_BEFORE_CALL_9|)))))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_ldv_malloc_#res.base_28|))))) (and (forall ((ldv_malloc_~size (_ BitVec 32))) (bvule (bvadd (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_alloc_14_~list#1.base_BEFORE_CALL_12|) |v_ULTIMATE.start_alloc_14_~list#1.offset_BEFORE_CALL_9|) (_ bv8 32)) (select (store |c_#length| |v_ldv_malloc_#res.base_29| ldv_malloc_~size) (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_alloc_14_~list#1.base_BEFORE_CALL_12|) |v_ULTIMATE.start_alloc_14_~list#1.offset_BEFORE_CALL_9|)))) (let ((.cse1 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_alloc_14_~list#1.base_BEFORE_CALL_12|) |v_ULTIMATE.start_alloc_14_~list#1.offset_BEFORE_CALL_9|))) (bvule (bvadd .cse1 (_ bv4 32)) (bvadd .cse1 (_ bv8 32))))))) is different from true [2021-11-20 06:21:53,203 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 06:21:53,203 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:21:53,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1946406581] [2021-11-20 06:21:53,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1946406581] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:21:53,204 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:21:53,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 19 [2021-11-20 06:21:53,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911125757] [2021-11-20 06:21:53,204 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:21:53,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 06:21:53,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:21:53,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 06:21:53,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=296, Unknown=3, NotChecked=34, Total=380 [2021-11-20 06:21:53,206 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 20 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:21:54,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:21:54,779 INFO L93 Difference]: Finished difference Result 91 states and 94 transitions. [2021-11-20 06:21:54,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:21:54,780 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2021-11-20 06:21:54,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:21:54,781 INFO L225 Difference]: With dead ends: 91 [2021-11-20 06:21:54,781 INFO L226 Difference]: Without dead ends: 91 [2021-11-20 06:21:54,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=68, Invalid=395, Unknown=3, NotChecked=40, Total=506 [2021-11-20 06:21:54,783 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 49 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:21:54,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 528 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 384 Invalid, 0 Unknown, 221 Unchecked, 1.3s Time] [2021-11-20 06:21:54,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-20 06:21:54,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 84. [2021-11-20 06:21:54,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 50 states have (on average 1.6) internal successors, (80), 72 states have internal predecessors, (80), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-20 06:21:54,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2021-11-20 06:21:54,792 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 15 [2021-11-20 06:21:54,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:21:54,792 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2021-11-20 06:21:54,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 6 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:21:54,793 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2021-11-20 06:21:54,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 06:21:54,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:21:54,794 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:21:54,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:21:55,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:21:55,003 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __ldv_list_addErr1REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 06:21:55,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:21:55,003 INFO L85 PathProgramCache]: Analyzing trace with hash -115198833, now seen corresponding path program 1 times [2021-11-20 06:21:55,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:21:55,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1513148186] [2021-11-20 06:21:55,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:21:55,004 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:21:55,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:21:55,005 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:21:55,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 06:21:55,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:55,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:21:55,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:21:55,144 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 06:21:55,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:21:55,219 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 06:21:55,219 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:21:55,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1513148186] [2021-11-20 06:21:55,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1513148186] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:21:55,220 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:21:55,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 06:21:55,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399593885] [2021-11-20 06:21:55,220 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:21:55,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:21:55,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:21:55,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:21:55,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:21:55,222 INFO L87 Difference]: Start difference. First operand 84 states and 93 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:21:55,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:21:55,255 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2021-11-20 06:21:55,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:21:55,256 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-20 06:21:55,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:21:55,257 INFO L225 Difference]: With dead ends: 88 [2021-11-20 06:21:55,257 INFO L226 Difference]: Without dead ends: 88 [2021-11-20 06:21:55,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 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 06:21:55,259 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 18 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:21:55,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 270 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:21:55,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-20 06:21:55,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 72. [2021-11-20 06:21:55,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 42 states have (on average 1.5238095238095237) internal successors, (64), 62 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-20 06:21:55,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-11-20 06:21:55,278 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 15 [2021-11-20 06:21:55,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:21:55,279 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-11-20 06:21:55,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:21:55,279 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-11-20 06:21:55,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 06:21:55,281 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:21:55,281 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:21:55,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:21:55,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:21:55,493 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 06:21:55,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:21:55,493 INFO L85 PathProgramCache]: Analyzing trace with hash 898943928, now seen corresponding path program 1 times [2021-11-20 06:21:55,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:21:55,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [32346668] [2021-11-20 06:21:55,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:21:55,493 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:21:55,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:21:55,494 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:21:55,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-20 06:21:55,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:55,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 06:21:55,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:21:55,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:21:55,606 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 20 treesize of output 18 [2021-11-20 06:21:55,839 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 34 treesize of output 26 [2021-11-20 06:21:55,843 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 23 treesize of output 15 [2021-11-20 06:21:55,913 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 06:21:55,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:21:56,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:21:56,420 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:21:56,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [32346668] [2021-11-20 06:21:56,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [32346668] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:21:56,421 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:21:56,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-20 06:21:56,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300414721] [2021-11-20 06:21:56,421 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:21:56,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:21:56,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:21:56,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:21:56,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:21:56,423 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 12 states have internal predecessors, (21), 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 06:21:57,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:21:57,623 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2021-11-20 06:21:57,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:21:57,625 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 12 states have internal predecessors, (21), 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 13 [2021-11-20 06:21:57,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:21:57,626 INFO L225 Difference]: With dead ends: 90 [2021-11-20 06:21:57,626 INFO L226 Difference]: Without dead ends: 90 [2021-11-20 06:21:57,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:21:57,627 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 35 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:21:57,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 300 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 204 Invalid, 0 Unknown, 54 Unchecked, 0.9s Time] [2021-11-20 06:21:57,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-20 06:21:57,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 74. [2021-11-20 06:21:57,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 64 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-20 06:21:57,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2021-11-20 06:21:57,635 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 13 [2021-11-20 06:21:57,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:21:57,636 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2021-11-20 06:21:57,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 12 states have internal predecessors, (21), 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 06:21:57,636 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2021-11-20 06:21:57,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 06:21:57,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:21:57,637 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:21:57,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-20 06:21:57,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:21:57,842 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 06:21:57,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:21:57,843 INFO L85 PathProgramCache]: Analyzing trace with hash 898943927, now seen corresponding path program 1 times [2021-11-20 06:21:57,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:21:57,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1199709230] [2021-11-20 06:21:57,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:21:57,843 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:21:57,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:21:57,844 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:21:57,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-20 06:21:57,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:57,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:21:57,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:21:57,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:21:57,947 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 15 [2021-11-20 06:21:58,077 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 16 [2021-11-20 06:21:58,115 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 06:21:58,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:21:58,334 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 06:21:58,334 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:21:58,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1199709230] [2021-11-20 06:21:58,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1199709230] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:21:58,335 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:21:58,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-20 06:21:58,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787903507] [2021-11-20 06:21:58,335 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:21:58,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:21:58,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:21:58,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:21:58,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:21:58,337 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 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 06:21:58,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:21:58,813 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2021-11-20 06:21:58,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:21:58,814 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 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 13 [2021-11-20 06:21:58,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:21:58,814 INFO L225 Difference]: With dead ends: 82 [2021-11-20 06:21:58,815 INFO L226 Difference]: Without dead ends: 82 [2021-11-20 06:21:58,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:21:58,816 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 24 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:21:58,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 276 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 177 Invalid, 0 Unknown, 58 Unchecked, 0.4s Time] [2021-11-20 06:21:58,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-20 06:21:58,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2021-11-20 06:21:58,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.5) internal successors, (66), 64 states have internal predecessors, (66), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-20 06:21:58,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2021-11-20 06:21:58,820 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 13 [2021-11-20 06:21:58,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:21:58,821 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2021-11-20 06:21:58,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 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 06:21:58,821 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2021-11-20 06:21:58,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 06:21:58,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:21:58,822 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:21:58,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:21:59,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:21:59,031 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __ldv_list_addErr2REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 06:21:59,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:21:59,036 INFO L85 PathProgramCache]: Analyzing trace with hash 594720773, now seen corresponding path program 1 times [2021-11-20 06:21:59,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:21:59,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [125508612] [2021-11-20 06:21:59,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:21:59,037 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:21:59,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:21:59,038 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:21:59,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-20 06:21:59,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:21:59,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:21:59,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:21:59,125 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 06:21:59,229 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 06:21:59,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:21:59,340 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 06:21:59,341 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:21:59,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [125508612] [2021-11-20 06:21:59,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [125508612] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:21:59,341 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:21:59,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-11-20 06:21:59,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653201849] [2021-11-20 06:21:59,342 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:21:59,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:21:59,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:21:59,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:21:59,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:21:59,343 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:21:59,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:21:59,829 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2021-11-20 06:21:59,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:21:59,829 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-11-20 06:21:59,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:21:59,830 INFO L225 Difference]: With dead ends: 81 [2021-11-20 06:21:59,830 INFO L226 Difference]: Without dead ends: 81 [2021-11-20 06:21:59,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:21:59,832 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 40 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:21:59,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 307 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:21:59,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-20 06:21:59,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2021-11-20 06:21:59,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 62 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-20 06:21:59,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-11-20 06:21:59,836 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 16 [2021-11-20 06:21:59,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:21:59,837 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-11-20 06:21:59,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:21:59,837 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-11-20 06:21:59,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 06:21:59,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:21:59,838 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:21:59,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:22:00,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:22:00,038 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __ldv_list_addErr3REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 06:22:00,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:22:00,039 INFO L85 PathProgramCache]: Analyzing trace with hash 594720774, now seen corresponding path program 1 times [2021-11-20 06:22:00,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:22:00,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [757734036] [2021-11-20 06:22:00,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:22:00,040 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:22:00,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:22:00,042 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:22:00,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-20 06:22:00,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:00,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 06:22:00,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:22:00,152 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 06:22:00,388 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 06:22:00,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:22:01,247 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 06:22:01,247 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:22:01,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [757734036] [2021-11-20 06:22:01,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [757734036] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:22:01,248 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:22:01,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 17 [2021-11-20 06:22:01,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582921576] [2021-11-20 06:22:01,248 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:22:01,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:22:01,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:22:01,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:22:01,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:22:01,250 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 12 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:22:02,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:22:02,617 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2021-11-20 06:22:02,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:22:02,618 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 12 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2021-11-20 06:22:02,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:22:02,619 INFO L225 Difference]: With dead ends: 82 [2021-11-20 06:22:02,619 INFO L226 Difference]: Without dead ends: 82 [2021-11-20 06:22:02,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:22:02,621 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 55 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:22:02,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 564 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-20 06:22:02,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-20 06:22:02,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 70. [2021-11-20 06:22:02,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 60 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-20 06:22:02,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2021-11-20 06:22:02,633 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 16 [2021-11-20 06:22:02,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:22:02,633 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2021-11-20 06:22:02,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 12 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:22:02,634 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2021-11-20 06:22:02,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 06:22:02,634 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:22:02,635 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:22:02,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:22:02,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:22:02,835 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __ldv_list_addErr6REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 06:22:02,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:22:02,835 INFO L85 PathProgramCache]: Analyzing trace with hash 296014184, now seen corresponding path program 1 times [2021-11-20 06:22:02,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:22:02,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [162509024] [2021-11-20 06:22:02,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:22:02,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:22:02,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:22:02,837 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:22:02,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-20 06:22:02,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:02,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:22:02,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:22:02,985 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 06:22:02,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:22:03,035 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 06:22:03,036 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:22:03,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [162509024] [2021-11-20 06:22:03,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [162509024] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:22:03,036 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:22:03,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-20 06:22:03,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715995935] [2021-11-20 06:22:03,036 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:22:03,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:22:03,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:22:03,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:22:03,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:22:03,037 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 5 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:22:03,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:22:03,213 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2021-11-20 06:22:03,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:22:03,213 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-11-20 06:22:03,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:22:03,214 INFO L225 Difference]: With dead ends: 69 [2021-11-20 06:22:03,214 INFO L226 Difference]: Without dead ends: 69 [2021-11-20 06:22:03,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 2 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 06:22:03,215 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 12 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:22:03,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 153 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:22:03,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-20 06:22:03,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-11-20 06:22:03,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 44 states have (on average 1.3863636363636365) internal successors, (61), 59 states have internal predecessors, (61), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-20 06:22:03,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-11-20 06:22:03,219 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 18 [2021-11-20 06:22:03,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:22:03,219 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-11-20 06:22:03,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:22:03,219 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-11-20 06:22:03,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 06:22:03,220 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:22:03,220 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:22:03,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-20 06:22:03,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:22:03,423 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __ldv_list_addErr7REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 06:22:03,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:22:03,423 INFO L85 PathProgramCache]: Analyzing trace with hash 296014185, now seen corresponding path program 1 times [2021-11-20 06:22:03,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:22:03,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [360761670] [2021-11-20 06:22:03,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:22:03,424 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:22:03,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:22:03,425 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:22:03,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-20 06:22:03,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:03,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 06:22:03,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:22:03,684 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 06:22:03,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:22:03,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-11-20 06:22:04,127 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 06:22:04,127 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:22:04,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [360761670] [2021-11-20 06:22:04,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [360761670] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:22:04,128 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:22:04,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-11-20 06:22:04,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983765756] [2021-11-20 06:22:04,128 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:22:04,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:22:04,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:22:04,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:22:04,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:22:04,129 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 14 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:22:04,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:22:04,742 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2021-11-20 06:22:04,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:22:04,743 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-11-20 06:22:04,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:22:04,744 INFO L225 Difference]: With dead ends: 68 [2021-11-20 06:22:04,744 INFO L226 Difference]: Without dead ends: 68 [2021-11-20 06:22:04,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:22:04,744 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 43 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:22:04,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 445 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:22:04,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-20 06:22:04,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-11-20 06:22:04,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 58 states have internal predecessors, (60), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-20 06:22:04,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2021-11-20 06:22:04,748 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 18 [2021-11-20 06:22:04,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:22:04,748 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2021-11-20 06:22:04,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:22:04,748 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2021-11-20 06:22:04,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 06:22:04,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:22:04,749 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:22:04,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-20 06:22:04,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:22:04,955 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_list_delErr0REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 06:22:04,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:22:04,955 INFO L85 PathProgramCache]: Analyzing trace with hash -953601884, now seen corresponding path program 1 times [2021-11-20 06:22:04,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:22:04,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1278862236] [2021-11-20 06:22:04,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:22:04,955 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:22:04,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:22:04,956 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:22:04,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-20 06:22:05,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:05,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 06:22:05,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:22:05,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:22:05,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2021-11-20 06:22:05,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 06:22:05,277 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 06:22:05,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:22:05,458 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 06:22:05,458 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:22:05,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1278862236] [2021-11-20 06:22:05,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1278862236] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:22:05,459 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:22:05,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 11 [2021-11-20 06:22:05,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704374551] [2021-11-20 06:22:05,459 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:22:05,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:22:05,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:22:05,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:22:05,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:22:05,461 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:22:05,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:22:05,805 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-11-20 06:22:05,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:22:05,806 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-11-20 06:22:05,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:22:05,807 INFO L225 Difference]: With dead ends: 74 [2021-11-20 06:22:05,807 INFO L226 Difference]: Without dead ends: 74 [2021-11-20 06:22:05,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:22:05,808 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 30 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:22:05,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 313 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 83 Invalid, 0 Unknown, 16 Unchecked, 0.2s Time] [2021-11-20 06:22:05,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-20 06:22:05,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2021-11-20 06:22:05,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 60 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-20 06:22:05,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2021-11-20 06:22:05,812 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 18 [2021-11-20 06:22:05,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:22:05,812 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2021-11-20 06:22:05,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:22:05,813 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2021-11-20 06:22:05,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 06:22:05,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:22:05,814 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:22:05,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-20 06:22:06,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:22:06,019 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 06:22:06,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:22:06,019 INFO L85 PathProgramCache]: Analyzing trace with hash -953703910, now seen corresponding path program 1 times [2021-11-20 06:22:06,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:22:06,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [467390329] [2021-11-20 06:22:06,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:22:06,020 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:22:06,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:22:06,020 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:22:06,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-20 06:22:06,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:06,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:22:06,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:22:06,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:22:06,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:22:06,317 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 06:22:06,317 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:22:06,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [467390329] [2021-11-20 06:22:06,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [467390329] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:22:06,318 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:22:06,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-20 06:22:06,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416983775] [2021-11-20 06:22:06,319 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:22:06,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:22:06,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:22:06,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:22:06,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:22:06,320 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 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 06:22:06,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:22:06,563 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2021-11-20 06:22:06,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:22:06,564 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 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 18 [2021-11-20 06:22:06,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:22:06,565 INFO L225 Difference]: With dead ends: 73 [2021-11-20 06:22:06,565 INFO L226 Difference]: Without dead ends: 60 [2021-11-20 06:22:06,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:22:06,566 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 26 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:22:06,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 99 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:22:06,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-20 06:22:06,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-11-20 06:22:06,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 37 states have (on average 1.4054054054054055) internal successors, (52), 51 states have internal predecessors, (52), 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 06:22:06,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2021-11-20 06:22:06,570 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 18 [2021-11-20 06:22:06,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:22:06,570 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2021-11-20 06:22:06,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 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 06:22:06,571 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2021-11-20 06:22:06,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 06:22:06,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:22:06,572 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:22:06,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-20 06:22:06,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:22:06,783 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 06:22:06,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:22:06,783 INFO L85 PathProgramCache]: Analyzing trace with hash 783634007, now seen corresponding path program 1 times [2021-11-20 06:22:06,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:22:06,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1153919537] [2021-11-20 06:22:06,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:22:06,784 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:22:06,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:22:06,785 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:22:06,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-20 06:22:06,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:06,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:22:06,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:22:07,047 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 06:22:07,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:22:07,120 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 06:22:07,120 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 19 treesize of output 18 [2021-11-20 06:22:07,172 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 06:22:07,172 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 16 treesize of output 15 [2021-11-20 06:22:07,194 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 06:22:07,195 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:22:07,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1153919537] [2021-11-20 06:22:07,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1153919537] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:22:07,195 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:22:07,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 7 [2021-11-20 06:22:07,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531104037] [2021-11-20 06:22:07,195 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:22:07,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:22:07,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:22:07,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:22:07,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:22:07,196 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:22:07,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:22:07,336 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2021-11-20 06:22:07,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:22:07,336 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2021-11-20 06:22:07,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:22:07,337 INFO L225 Difference]: With dead ends: 59 [2021-11-20 06:22:07,337 INFO L226 Difference]: Without dead ends: 59 [2021-11-20 06:22:07,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:22:07,338 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 48 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:22:07,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 163 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2021-11-20 06:22:07,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-20 06:22:07,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-20 06:22:07,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 50 states have internal predecessors, (51), 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 06:22:07,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-11-20 06:22:07,342 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 25 [2021-11-20 06:22:07,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:22:07,343 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-11-20 06:22:07,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:22:07,343 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-11-20 06:22:07,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 06:22:07,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:22:07,344 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:22:07,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-20 06:22:07,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:22:07,556 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 06:22:07,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:22:07,556 INFO L85 PathProgramCache]: Analyzing trace with hash 783634008, now seen corresponding path program 1 times [2021-11-20 06:22:07,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:22:07,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1713303175] [2021-11-20 06:22:07,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:22:07,557 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:22:07,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:22:07,557 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:22:07,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-20 06:22:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:07,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 06:22:07,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:22:07,814 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 06:22:07,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:22:08,012 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:22:08,013 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 22 treesize of output 26 [2021-11-20 06:22:08,439 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:22:08,439 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 30 treesize of output 34 [2021-11-20 06:22:08,752 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 06:22:08,753 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:22:08,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1713303175] [2021-11-20 06:22:08,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1713303175] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:22:08,753 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:22:08,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-20 06:22:08,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574341557] [2021-11-20 06:22:08,753 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:22:08,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:22:08,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:22:08,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:22:08,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:22:08,755 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 4 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 06:22:09,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:22:09,164 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-11-20 06:22:09,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:22:09,165 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 4 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 25 [2021-11-20 06:22:09,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:22:09,165 INFO L225 Difference]: With dead ends: 58 [2021-11-20 06:22:09,165 INFO L226 Difference]: Without dead ends: 58 [2021-11-20 06:22:09,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:22:09,166 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 60 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:22:09,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 284 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 89 Invalid, 0 Unknown, 42 Unchecked, 0.3s Time] [2021-11-20 06:22:09,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-20 06:22:09,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-20 06:22:09,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 49 states have internal predecessors, (50), 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 06:22:09,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2021-11-20 06:22:09,169 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 25 [2021-11-20 06:22:09,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:22:09,170 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2021-11-20 06:22:09,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 4 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 06:22:09,170 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2021-11-20 06:22:09,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 06:22:09,171 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:22:09,171 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 06:22:09,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-20 06:22:09,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:22:09,379 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 06:22:09,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:22:09,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1453003897, now seen corresponding path program 1 times [2021-11-20 06:22:09,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:22:09,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [904436968] [2021-11-20 06:22:09,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:22:09,379 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:22:09,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:22:09,380 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:22:09,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-20 06:22:09,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:09,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-20 06:22:09,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:22:09,501 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 06:22:09,862 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 11 treesize of output 7 [2021-11-20 06:22:09,869 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 06:22:10,118 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 23 [2021-11-20 06:22:10,121 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 20 treesize of output 12 [2021-11-20 06:22:10,219 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 06:22:10,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:22:11,071 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 64 treesize of output 60 [2021-11-20 06:22:11,076 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 90 treesize of output 82 [2021-11-20 06:22:11,361 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 38 treesize of output 30 [2021-11-20 06:22:11,989 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 60 treesize of output 56 [2021-11-20 06:22:11,997 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 90 treesize of output 82 [2021-11-20 06:22:12,294 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 28 [2021-11-20 06:22:13,109 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 28 [2021-11-20 06:22:13,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:22:13,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:22:13,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:22:13,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:22:14,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:22:14,202 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:22:14,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [904436968] [2021-11-20 06:22:14,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [904436968] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:22:14,203 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:22:14,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15, 14] imperfect sequences [] total 27 [2021-11-20 06:22:14,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516863143] [2021-11-20 06:22:14,203 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:22:14,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-20 06:22:14,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:22:14,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-20 06:22:14,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:22:14,205 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 28 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 23 states have internal predecessors, (40), 5 states have call successors, (5), 2 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 06:22:15,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:22:15,971 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2021-11-20 06:22:15,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 06:22:15,972 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 23 states have internal predecessors, (40), 5 states have call successors, (5), 2 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 27 [2021-11-20 06:22:15,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:22:15,973 INFO L225 Difference]: With dead ends: 66 [2021-11-20 06:22:15,973 INFO L226 Difference]: Without dead ends: 66 [2021-11-20 06:22:15,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 06:22:15,974 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 49 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:22:15,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 404 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 303 Invalid, 0 Unknown, 103 Unchecked, 1.3s Time] [2021-11-20 06:22:15,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-20 06:22:15,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2021-11-20 06:22:15,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 48 states have internal predecessors, (49), 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 06:22:15,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-11-20 06:22:15,977 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 27 [2021-11-20 06:22:15,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:22:15,977 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-11-20 06:22:15,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 23 states have internal predecessors, (40), 5 states have call successors, (5), 2 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 06:22:15,978 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-11-20 06:22:15,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 06:22:15,978 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:22:15,978 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 06:22:15,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-20 06:22:16,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:22:16,179 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 06:22:16,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:22:16,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1453003896, now seen corresponding path program 1 times [2021-11-20 06:22:16,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:22:16,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1737739776] [2021-11-20 06:22:16,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:22:16,180 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:22:16,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:22:16,181 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:22:16,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-20 06:22:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:16,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-20 06:22:16,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:22:16,302 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 06:22:16,657 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 06:22:16,905 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 27 treesize of output 19 [2021-11-20 06:22:16,984 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 06:22:16,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:22:17,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2021-11-20 06:22:17,661 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 85 treesize of output 81 [2021-11-20 06:22:18,408 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 163 treesize of output 159 [2021-11-20 06:22:19,749 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 06:22:19,749 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:22:19,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1737739776] [2021-11-20 06:22:19,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1737739776] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:22:19,749 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:22:19,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14, 13] imperfect sequences [] total 20 [2021-11-20 06:22:19,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975564380] [2021-11-20 06:22:19,750 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:22:19,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 06:22:19,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:22:19,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 06:22:19,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:22:19,751 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 21 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 06:22:20,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:22:20,146 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2021-11-20 06:22:20,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:22:20,147 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 27 [2021-11-20 06:22:20,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:22:20,148 INFO L225 Difference]: With dead ends: 62 [2021-11-20 06:22:20,148 INFO L226 Difference]: Without dead ends: 62 [2021-11-20 06:22:20,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:22:20,149 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:22:20,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 306 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 208 Unchecked, 0.2s Time] [2021-11-20 06:22:20,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-20 06:22:20,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2021-11-20 06:22:20,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 47 states have internal predecessors, (48), 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 06:22:20,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2021-11-20 06:22:20,153 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 27 [2021-11-20 06:22:20,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:22:20,153 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2021-11-20 06:22:20,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 06:22:20,154 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2021-11-20 06:22:20,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 06:22:20,155 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:22:20,155 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, 1, 1, 1, 1, 1] [2021-11-20 06:22:20,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-20 06:22:20,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:22:20,359 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_list_delErr0REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 06:22:20,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:22:20,359 INFO L85 PathProgramCache]: Analyzing trace with hash -2144913277, now seen corresponding path program 1 times [2021-11-20 06:22:20,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:22:20,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1636738314] [2021-11-20 06:22:20,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:22:20,359 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:22:20,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:22:20,361 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:22:20,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-20 06:22:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:20,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-20 06:22:20,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:22:20,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 06:22:20,769 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 06:22:20,954 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 11 [2021-11-20 06:22:21,195 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 06:22:21,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:22:21,643 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 40 treesize of output 36 [2021-11-20 06:22:22,011 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 71 treesize of output 67 [2021-11-20 06:22:23,640 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 102 treesize of output 98 [2021-11-20 06:22:25,261 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 06:22:25,261 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:22:25,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1636738314] [2021-11-20 06:22:25,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1636738314] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:22:25,262 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:22:25,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16, 15] imperfect sequences [] total 22 [2021-11-20 06:22:25,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592634577] [2021-11-20 06:22:25,262 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:22:25,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 06:22:25,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:22:25,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 06:22:25,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:22:25,264 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 23 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 18 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 06:22:25,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:22:25,914 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2021-11-20 06:22:25,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 06:22:25,915 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 18 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 32 [2021-11-20 06:22:25,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:22:25,915 INFO L225 Difference]: With dead ends: 76 [2021-11-20 06:22:25,916 INFO L226 Difference]: Without dead ends: 76 [2021-11-20 06:22:25,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 13 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:22:25,916 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 60 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 333 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:22:25,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 367 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 244 Invalid, 0 Unknown, 333 Unchecked, 0.4s Time] [2021-11-20 06:22:25,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-20 06:22:25,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 66. [2021-11-20 06:22:25,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 56 states have internal predecessors, (63), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 06:22:25,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2021-11-20 06:22:25,920 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 32 [2021-11-20 06:22:25,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:22:25,921 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2021-11-20 06:22:25,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 18 states have internal predecessors, (37), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 06:22:25,921 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2021-11-20 06:22:25,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 06:22:25,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:22:25,922 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, 1, 1, 1, 1, 1] [2021-11-20 06:22:25,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-20 06:22:26,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:22:26,134 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_list_delErr1REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 06:22:26,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:22:26,134 INFO L85 PathProgramCache]: Analyzing trace with hash -2144913276, now seen corresponding path program 1 times [2021-11-20 06:22:26,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:22:26,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1883714681] [2021-11-20 06:22:26,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:22:26,135 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:22:26,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:22:26,136 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:22:26,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-20 06:22:26,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:26,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-20 06:22:26,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:22:26,260 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 06:22:26,584 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 06:22:26,593 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 06:22:26,824 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 23 [2021-11-20 06:22:26,827 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 20 treesize of output 12 [2021-11-20 06:22:27,026 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 06:22:27,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:22:28,014 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 64 treesize of output 60 [2021-11-20 06:22:28,017 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 90 treesize of output 82 [2021-11-20 06:22:28,273 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 40 treesize of output 32 [2021-11-20 06:22:28,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-11-20 06:22:29,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:22:29,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:22:29,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:22:29,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:22:29,754 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 40 treesize of output 32 [2021-11-20 06:22:29,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:22:29,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:22:29,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:22:29,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:22:31,026 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 06:22:31,027 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:22:31,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1883714681] [2021-11-20 06:22:31,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1883714681] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:22:31,027 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:22:31,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17, 16] imperfect sequences [] total 31 [2021-11-20 06:22:31,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040765442] [2021-11-20 06:22:31,027 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:22:31,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-20 06:22:31,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:22:31,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-20 06:22:31,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2021-11-20 06:22:31,029 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand has 32 states, 30 states have (on average 1.6) internal successors, (48), 25 states have internal predecessors, (48), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 06:22:32,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:22:32,831 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-11-20 06:22:32,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 06:22:32,834 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 1.6) internal successors, (48), 25 states have internal predecessors, (48), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 32 [2021-11-20 06:22:32,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:22:32,835 INFO L225 Difference]: With dead ends: 74 [2021-11-20 06:22:32,835 INFO L226 Difference]: Without dead ends: 74 [2021-11-20 06:22:32,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=121, Invalid=1139, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 06:22:32,836 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 74 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:22:32,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 444 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 420 Invalid, 0 Unknown, 57 Unchecked, 1.5s Time] [2021-11-20 06:22:32,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-20 06:22:32,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2021-11-20 06:22:32,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 46 states have (on average 1.326086956521739) internal successors, (61), 56 states have internal predecessors, (61), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 06:22:32,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2021-11-20 06:22:32,839 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 32 [2021-11-20 06:22:32,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:22:32,839 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2021-11-20 06:22:32,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 1.6) internal successors, (48), 25 states have internal predecessors, (48), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 06:22:32,840 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2021-11-20 06:22:32,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 06:22:32,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:22:32,841 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, 1, 1, 1, 1, 1] [2021-11-20 06:22:32,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-20 06:22:33,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:22:33,051 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 06:22:33,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:22:33,051 INFO L85 PathProgramCache]: Analyzing trace with hash -2145015303, now seen corresponding path program 1 times [2021-11-20 06:22:33,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:22:33,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [648103245] [2021-11-20 06:22:33,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:22:33,051 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:22:33,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:22:33,053 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:22:33,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-20 06:22:33,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:33,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-20 06:22:33,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:22:33,381 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 06:22:33,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:22:33,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2021-11-20 06:22:33,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:22:33,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:22:33,909 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 32 treesize of output 28 [2021-11-20 06:22:34,107 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 30 treesize of output 26 [2021-11-20 06:22:34,241 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 30 treesize of output 26 [2021-11-20 06:22:34,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:22:34,561 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:22:34,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [648103245] [2021-11-20 06:22:34,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [648103245] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:22:34,562 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:22:34,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14, 14] imperfect sequences [] total 25 [2021-11-20 06:22:34,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231927022] [2021-11-20 06:22:34,562 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:22:34,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 06:22:34,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:22:34,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 06:22:34,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:22:34,564 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 25 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 21 states have internal predecessors, (45), 6 states have call successors, (6), 1 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 06:22:35,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:22:35,457 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2021-11-20 06:22:35,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 06:22:35,458 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 21 states have internal predecessors, (45), 6 states have call successors, (6), 1 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 32 [2021-11-20 06:22:35,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:22:35,458 INFO L225 Difference]: With dead ends: 67 [2021-11-20 06:22:35,458 INFO L226 Difference]: Without dead ends: 67 [2021-11-20 06:22:35,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2021-11-20 06:22:35,460 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 47 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:22:35,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 620 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:22:35,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-20 06:22:35,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2021-11-20 06:22:35,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 56 states have internal predecessors, (60), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 06:22:35,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-11-20 06:22:35,463 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 32 [2021-11-20 06:22:35,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:22:35,464 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-11-20 06:22:35,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 21 states have internal predecessors, (45), 6 states have call successors, (6), 1 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 06:22:35,464 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-11-20 06:22:35,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 06:22:35,465 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:22:35,465 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:22:35,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-20 06:22:35,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:22:35,671 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_list_delErr4REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 21 more)] === [2021-11-20 06:22:35,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:22:35,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1412027647, now seen corresponding path program 1 times [2021-11-20 06:22:35,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:22:35,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784892156] [2021-11-20 06:22:35,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:22:35,671 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:22:35,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:22:35,672 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:22:35,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_53bf410d-07da-477b-9c0c-d75a257c0c71/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-20 06:22:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:22:35,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-20 06:22:35,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:22:35,905 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-11-20 06:22:35,906 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 12 treesize of output 21 [2021-11-20 06:22:35,977 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:22:35,977 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 33 [2021-11-20 06:22:36,168 INFO L354 Elim1Store]: treesize reduction 9, result has 64.0 percent of original size [2021-11-20 06:22:36,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 40 [2021-11-20 06:22:36,820 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 06:22:36,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:22:36,962 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 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-20 06:22:37,163 INFO L354 Elim1Store]: treesize reduction 56, result has 30.9 percent of original size [2021-11-20 06:22:37,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 28 treesize of output 38 [2021-11-20 06:22:37,189 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 06:22:37,610 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 64 treesize of output 56 [2021-11-20 06:22:37,859 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 79 treesize of output 63 [2021-11-20 06:22:38,511 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-20 06:22:38,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 38 [2021-11-20 06:22:38,633 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 06:22:38,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:22:40,575 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:22:40,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 204430 treesize of output 190838 [2021-11-20 06:22:51,916 WARN L227 SmtUtils]: Spent 11.34s on a formula simplification. DAG size of input: 526 DAG size of output: 511 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 06:22:53,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:22:53,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 157658 treesize of output 156680 [2021-11-20 06:22:54,058 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 158129 treesize of output 157609 [2021-11-20 06:23:01,785 WARN L227 SmtUtils]: Spent 7.72s on a formula simplification. DAG size of input: 601 DAG size of output: 600 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)