./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 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test14_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa --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 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:17:22,434 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:17:22,436 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:17:22,467 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:17:22,468 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:17:22,469 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:17:22,471 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:17:22,473 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:17:22,475 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:17:22,476 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:17:22,477 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:17:22,479 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:17:22,479 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:17:22,480 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:17:22,482 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:17:22,483 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:17:22,484 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:17:22,485 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:17:22,487 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:17:22,489 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:17:22,491 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:17:22,492 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:17:22,494 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:17:22,494 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:17:22,498 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:17:22,498 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:17:22,499 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:17:22,500 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:17:22,500 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:17:22,501 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:17:22,502 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:17:22,502 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:17:22,503 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:17:22,504 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:17:22,505 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:17:22,505 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:17:22,506 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:17:22,506 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:17:22,506 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:17:22,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:17:22,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:17:22,508 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-06 17:17:22,531 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:17:22,532 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:17:22,532 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:17:22,532 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:17:22,533 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:17:22,533 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:17:22,533 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:17:22,534 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:17:22,534 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:17:22,534 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:17:22,534 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:17:22,534 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 17:17:22,535 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:17:22,535 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:17:22,535 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:17:22,535 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 17:17:22,535 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 17:17:22,535 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 17:17:22,536 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:17:22,536 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 17:17:22,536 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:17:22,536 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:17:22,536 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:17:22,536 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:17:22,537 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:17:22,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:17:22,537 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:17:22,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:17:22,537 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:17:22,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:17:22,538 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:17:22,538 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_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d789cb2558e3de4d1d16c03a2a21714577a96d35a26f84712733ec2a50aa0d89 [2021-12-06 17:17:22,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:17:22,740 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:17:22,742 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:17:22,743 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:17:22,743 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:17:22,744 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/ldv-memsafety/memleaks_test14_2.i [2021-12-06 17:17:22,793 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/data/adc9078d8/4376dd1d796d4bd6876156c8ea83ba4b/FLAGe14be8465 [2021-12-06 17:17:23,226 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:17:23,226 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/sv-benchmarks/c/ldv-memsafety/memleaks_test14_2.i [2021-12-06 17:17:23,237 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/data/adc9078d8/4376dd1d796d4bd6876156c8ea83ba4b/FLAGe14be8465 [2021-12-06 17:17:23,246 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/data/adc9078d8/4376dd1d796d4bd6876156c8ea83ba4b [2021-12-06 17:17:23,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:17:23,248 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:17:23,250 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:17:23,250 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:17:23,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:17:23,253 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:17:23" (1/1) ... [2021-12-06 17:17:23,254 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c87be88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:17:23, skipping insertion in model container [2021-12-06 17:17:23,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:17:23" (1/1) ... [2021-12-06 17:17:23,260 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:17:23,294 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:17:23,523 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:17:23,535 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) [2021-12-06 17:17:23,535 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3eb01fe8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:17:23, skipping insertion in model container [2021-12-06 17:17:23,535 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:17:23,536 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-12-06 17:17:23,537 INFO L158 Benchmark]: Toolchain (without parser) took 288.11ms. Allocated memory is still 92.3MB. Free memory was 54.2MB in the beginning and 63.1MB in the end (delta: -8.9MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-06 17:17:23,538 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 92.3MB. Free memory was 72.3MB in the beginning and 72.3MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 17:17:23,538 INFO L158 Benchmark]: CACSL2BoogieTranslator took 286.21ms. Allocated memory is still 92.3MB. Free memory was 53.9MB in the beginning and 63.1MB in the end (delta: -9.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-06 17:17:23,540 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 92.3MB. Free memory was 72.3MB in the beginning and 72.3MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 286.21ms. Allocated memory is still 92.3MB. Free memory was 53.9MB in the beginning and 63.1MB in the end (delta: -9.2MB). 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_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test14_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa --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 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:17:24,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:17:24,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:17:24,968 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:17:24,968 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:17:24,969 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:17:24,971 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:17:24,973 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:17:24,974 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:17:24,975 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:17:24,976 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:17:24,977 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:17:24,978 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:17:24,979 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:17:24,980 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:17:24,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:17:24,982 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:17:24,983 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:17:24,990 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:17:24,992 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:17:24,994 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:17:24,995 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:17:24,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:17:24,997 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:17:25,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:17:25,000 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:17:25,001 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:17:25,002 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:17:25,002 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:17:25,003 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:17:25,003 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:17:25,004 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:17:25,005 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:17:25,005 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:17:25,006 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:17:25,007 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:17:25,007 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:17:25,008 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:17:25,008 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:17:25,009 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:17:25,009 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:17:25,010 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-06 17:17:25,031 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:17:25,031 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:17:25,031 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:17:25,031 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:17:25,032 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:17:25,032 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:17:25,032 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:17:25,032 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:17:25,033 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:17:25,033 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:17:25,033 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:17:25,033 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 17:17:25,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:17:25,033 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:17:25,034 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:17:25,034 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 17:17:25,034 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 17:17:25,034 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 17:17:25,034 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:17:25,034 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 17:17:25,034 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-06 17:17:25,035 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-06 17:17:25,035 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:17:25,035 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:17:25,035 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:17:25,035 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:17:25,035 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:17:25,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:17:25,036 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:17:25,036 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:17:25,036 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-06 17:17:25,036 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-06 17:17:25,036 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:17:25,036 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-06 17:17:25,036 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_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d789cb2558e3de4d1d16c03a2a21714577a96d35a26f84712733ec2a50aa0d89 [2021-12-06 17:17:25,271 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:17:25,285 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:17:25,287 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:17:25,288 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:17:25,289 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:17:25,289 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/ldv-memsafety/memleaks_test14_2.i [2021-12-06 17:17:25,331 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/data/49e7c076c/611471cb4d744380afe66caf3e2b7a7f/FLAG798294aab [2021-12-06 17:17:25,769 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:17:25,769 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/sv-benchmarks/c/ldv-memsafety/memleaks_test14_2.i [2021-12-06 17:17:25,782 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/data/49e7c076c/611471cb4d744380afe66caf3e2b7a7f/FLAG798294aab [2021-12-06 17:17:25,795 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/data/49e7c076c/611471cb4d744380afe66caf3e2b7a7f [2021-12-06 17:17:25,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:17:25,799 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:17:25,800 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:17:25,800 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:17:25,803 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:17:25,803 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:17:25" (1/1) ... [2021-12-06 17:17:25,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28c3fe75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:17:25, skipping insertion in model container [2021-12-06 17:17:25,804 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:17:25" (1/1) ... [2021-12-06 17:17:25,809 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:17:25,845 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:17:26,119 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:17:26,132 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-12-06 17:17:26,140 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:17:26,178 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:17:26,185 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:17:26,226 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:17:26,260 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:17:26,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:17:26 WrapperNode [2021-12-06 17:17:26,261 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:17:26,261 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:17:26,262 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:17:26,262 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:17:26,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:17:26" (1/1) ... [2021-12-06 17:17:26,284 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:17:26" (1/1) ... [2021-12-06 17:17:26,301 INFO L137 Inliner]: procedures = 168, calls = 79, calls flagged for inlining = 21, calls inlined = 6, statements flattened = 55 [2021-12-06 17:17:26,301 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:17:26,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:17:26,302 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:17:26,302 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:17:26,308 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:17:26" (1/1) ... [2021-12-06 17:17:26,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:17:26" (1/1) ... [2021-12-06 17:17:26,311 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:17:26" (1/1) ... [2021-12-06 17:17:26,311 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:17:26" (1/1) ... [2021-12-06 17:17:26,318 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:17:26" (1/1) ... [2021-12-06 17:17:26,321 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:17:26" (1/1) ... [2021-12-06 17:17:26,323 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:17:26" (1/1) ... [2021-12-06 17:17:26,325 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:17:26,326 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:17:26,326 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:17:26,326 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:17:26,327 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:17:26" (1/1) ... [2021-12-06 17:17:26,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:17:26,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:17:26,350 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:17:26,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:17:26,378 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2021-12-06 17:17:26,379 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2021-12-06 17:17:26,379 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-06 17:17:26,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-06 17:17:26,379 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_add [2021-12-06 17:17:26,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_add [2021-12-06 17:17:26,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 17:17:26,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 17:17:26,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 17:17:26,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 17:17:26,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 17:17:26,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 17:17:26,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 17:17:26,380 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_del [2021-12-06 17:17:26,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_del [2021-12-06 17:17:26,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:17:26,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:17:26,463 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:17:26,465 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:17:26,758 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:17:26,765 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:17:26,765 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 17:17:26,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:17:26 BoogieIcfgContainer [2021-12-06 17:17:26,767 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:17:26,768 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:17:26,768 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:17:26,770 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:17:26,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:17:25" (1/3) ... [2021-12-06 17:17:26,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e3dc625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:17:26, skipping insertion in model container [2021-12-06 17:17:26,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:17:26" (2/3) ... [2021-12-06 17:17:26,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e3dc625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:17:26, skipping insertion in model container [2021-12-06 17:17:26,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:17:26" (3/3) ... [2021-12-06 17:17:26,773 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test14_2.i [2021-12-06 17:17:26,777 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:17:26,778 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2021-12-06 17:17:26,812 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:17:26,818 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 [2021-12-06 17:17:26,818 INFO L340 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2021-12-06 17:17:26,832 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) [2021-12-06 17:17:26,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 17:17:26,837 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:26,838 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:17:26,838 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)] === [2021-12-06 17:17:26,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:26,843 INFO L85 PathProgramCache]: Analyzing trace with hash 225826608, now seen corresponding path program 1 times [2021-12-06 17:17:26,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:17:26,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2000611457] [2021-12-06 17:17:26,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:26,853 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:17:26,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:17:26,854 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:17:26,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-06 17:17:26,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:26,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 17:17:26,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:17:27,006 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 [2021-12-06 17:17:27,119 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-06 17:17:27,120 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 19 treesize of output 24 [2021-12-06 17:17:27,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:17:27,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:17:27,175 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:17:27,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2000611457] [2021-12-06 17:17:27,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2000611457] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:27,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:17:27,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 17:17:27,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666330357] [2021-12-06 17:17:27,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:27,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:17:27,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:17:27,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:17:27,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:17:27,207 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 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 17:17:27,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:27,530 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2021-12-06 17:17:27,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:17:27,532 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-12-06 17:17:27,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:27,539 INFO L225 Difference]: With dead ends: 73 [2021-12-06 17:17:27,539 INFO L226 Difference]: Without dead ends: 71 [2021-12-06 17:17:27,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:17:27,544 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 68 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:17:27,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 121 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 188 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2021-12-06 17:17:27,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-06 17:17:27,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2021-12-06 17:17:27,582 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) [2021-12-06 17:17:27,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2021-12-06 17:17:27,585 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 12 [2021-12-06 17:17:27,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:17:27,585 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2021-12-06 17:17:27,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 17:17:27,585 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2021-12-06 17:17:27,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 17:17:27,586 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:27,586 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:17:27,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:17:27,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:17:27,788 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)] === [2021-12-06 17:17:27,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:27,791 INFO L85 PathProgramCache]: Analyzing trace with hash 225826609, now seen corresponding path program 1 times [2021-12-06 17:17:27,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:17:27,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2114387355] [2021-12-06 17:17:27,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:27,795 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:17:27,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:17:27,799 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:17:27,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-06 17:17:27,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:27,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 17:17:27,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:17:28,035 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 [2021-12-06 17:17:28,041 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 [2021-12-06 17:17:28,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:17:28,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 17:17:28,141 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:17:28,141 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 18 treesize of output 18 [2021-12-06 17:17:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:17:28,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:17:28,202 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:17:28,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2114387355] [2021-12-06 17:17:28,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2114387355] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:28,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:17:28,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 17:17:28,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970747679] [2021-12-06 17:17:28,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:28,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 17:17:28,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:17:28,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 17:17:28,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:17:28,205 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 17:17:30,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:30,583 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2021-12-06 17:17:30,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 17:17:30,584 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-12-06 17:17:30,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:30,586 INFO L225 Difference]: With dead ends: 90 [2021-12-06 17:17:30,586 INFO L226 Difference]: Without dead ends: 90 [2021-12-06 17:17:30,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=24, Invalid=65, Unknown=1, NotChecked=0, Total=90 [2021-12-06 17:17:30,587 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 87 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:17:30,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 158 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 244 Invalid, 0 Unknown, 63 Unchecked, 0.3s Time] [2021-12-06 17:17:30,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-06 17:17:30,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 68. [2021-12-06 17:17:30,595 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) [2021-12-06 17:17:30,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2021-12-06 17:17:30,596 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 12 [2021-12-06 17:17:30,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:17:30,597 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2021-12-06 17:17:30,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 17:17:30,597 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2021-12-06 17:17:30,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 17:17:30,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:30,597 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:17:30,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-06 17:17:30,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:17:30,799 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)] === [2021-12-06 17:17:30,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:30,800 INFO L85 PathProgramCache]: Analyzing trace with hash 838569493, now seen corresponding path program 1 times [2021-12-06 17:17:30,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:17:30,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [907268015] [2021-12-06 17:17:30,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:30,801 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:17:30,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:17:30,802 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:17:30,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-06 17:17:30,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:30,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:17:30,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:17:30,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:17:30,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:17:30,905 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:17:30,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [907268015] [2021-12-06 17:17:30,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [907268015] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:30,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:17:30,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:17:30,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499131434] [2021-12-06 17:17:30,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:30,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:17:30,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:17:30,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:17:30,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:17:30,907 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) [2021-12-06 17:17:30,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:30,923 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2021-12-06 17:17:30,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:17:30,924 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 [2021-12-06 17:17:30,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:30,925 INFO L225 Difference]: With dead ends: 93 [2021-12-06 17:17:30,925 INFO L226 Difference]: Without dead ends: 93 [2021-12-06 17:17:30,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:17:30,926 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 [2021-12-06 17:17:30,926 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] [2021-12-06 17:17:30,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-06 17:17:30,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 72. [2021-12-06 17:17:30,932 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) [2021-12-06 17:17:30,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2021-12-06 17:17:30,933 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 11 [2021-12-06 17:17:30,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:17:30,933 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2021-12-06 17:17:30,933 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) [2021-12-06 17:17:30,933 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2021-12-06 17:17:30,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 17:17:30,934 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:30,934 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:17:30,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-06 17:17:31,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:17:31,136 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)] === [2021-12-06 17:17:31,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:31,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1726073174, now seen corresponding path program 1 times [2021-12-06 17:17:31,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:17:31,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [481073457] [2021-12-06 17:17:31,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:31,141 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:17:31,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:17:31,143 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:17:31,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-06 17:17:31,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:31,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:17:31,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:17:31,224 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 [2021-12-06 17:17:31,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:17:31,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:17:31,257 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:17:31,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [481073457] [2021-12-06 17:17:31,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [481073457] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:31,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:17:31,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:17:31,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729720553] [2021-12-06 17:17:31,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:31,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:17:31,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:17:31,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:17:31,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:17:31,259 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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) [2021-12-06 17:17:31,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:31,487 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2021-12-06 17:17:31,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:17:31,488 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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 [2021-12-06 17:17:31,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:31,489 INFO L225 Difference]: With dead ends: 89 [2021-12-06 17:17:31,489 INFO L226 Difference]: Without dead ends: 89 [2021-12-06 17:17:31,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:17:31,490 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 76 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:17:31,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 85 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:17:31,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-06 17:17:31,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 75. [2021-12-06 17:17:31,498 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) [2021-12-06 17:17:31,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2021-12-06 17:17:31,499 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 11 [2021-12-06 17:17:31,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:17:31,499 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2021-12-06 17:17:31,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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) [2021-12-06 17:17:31,499 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2021-12-06 17:17:31,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 17:17:31,500 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:31,500 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:17:31,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-06 17:17:31,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:17:31,701 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)] === [2021-12-06 17:17:31,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:31,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1726073175, now seen corresponding path program 1 times [2021-12-06 17:17:31,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:17:31,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [726135995] [2021-12-06 17:17:31,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:31,705 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:17:31,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:17:31,708 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:17:31,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-06 17:17:31,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:31,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 17:17:31,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:17:31,815 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 [2021-12-06 17:17:31,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:17:31,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:17:31,861 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:17:31,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [726135995] [2021-12-06 17:17:31,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [726135995] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:31,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:17:31,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:17:31,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701620048] [2021-12-06 17:17:31,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:31,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:17:31,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:17:31,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:17:31,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:17:31,862 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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) [2021-12-06 17:17:32,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:32,117 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2021-12-06 17:17:32,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:17:32,118 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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 [2021-12-06 17:17:32,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:32,119 INFO L225 Difference]: With dead ends: 91 [2021-12-06 17:17:32,119 INFO L226 Difference]: Without dead ends: 91 [2021-12-06 17:17:32,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:17:32,120 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 64 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:17:32,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 100 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:17:32,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-06 17:17:32,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 75. [2021-12-06 17:17:32,127 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) [2021-12-06 17:17:32,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2021-12-06 17:17:32,128 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 11 [2021-12-06 17:17:32,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:17:32,129 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2021-12-06 17:17:32,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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) [2021-12-06 17:17:32,129 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2021-12-06 17:17:32,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 17:17:32,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:32,130 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:17:32,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-06 17:17:32,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:17:32,331 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)] === [2021-12-06 17:17:32,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:32,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1681752525, now seen corresponding path program 1 times [2021-12-06 17:17:32,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:17:32,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1177521324] [2021-12-06 17:17:32,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:32,336 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:17:32,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:17:32,337 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:17:32,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-06 17:17:32,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:32,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 17:17:32,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:17:32,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 17:17:32,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:17:32,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:17:32,490 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:17:32,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1177521324] [2021-12-06 17:17:32,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1177521324] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:32,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:17:32,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 17:17:32,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93224046] [2021-12-06 17:17:32,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:32,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 17:17:32,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:17:32,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 17:17:32,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:17:32,495 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 2 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) [2021-12-06 17:17:32,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:32,773 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2021-12-06 17:17:32,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 17:17:32,773 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 2 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 15 [2021-12-06 17:17:32,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:32,774 INFO L225 Difference]: With dead ends: 87 [2021-12-06 17:17:32,774 INFO L226 Difference]: Without dead ends: 87 [2021-12-06 17:17:32,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-06 17:17:32,775 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 44 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:17:32,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 322 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 158 Invalid, 0 Unknown, 26 Unchecked, 0.2s Time] [2021-12-06 17:17:32,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-06 17:17:32,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 74. [2021-12-06 17:17:32,779 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) [2021-12-06 17:17:32,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2021-12-06 17:17:32,780 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 15 [2021-12-06 17:17:32,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:17:32,780 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2021-12-06 17:17:32,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 2 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) [2021-12-06 17:17:32,781 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2021-12-06 17:17:32,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 17:17:32,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:32,781 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:17:32,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-06 17:17:32,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:17:32,983 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)] === [2021-12-06 17:17:32,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:32,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1681752526, now seen corresponding path program 1 times [2021-12-06 17:17:32,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:17:32,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2005409033] [2021-12-06 17:17:32,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:32,987 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:17:32,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:17:32,989 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:17:32,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-06 17:17:33,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:33,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 17:17:33,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:17:33,157 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 [2021-12-06 17:17:33,165 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 [2021-12-06 17:17:33,195 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 12 treesize of output 10 [2021-12-06 17:17:33,200 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 5 treesize of output 3 [2021-12-06 17:17:35,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:17:35,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 17:17:35,351 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:17:35,352 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 18 treesize of output 18 [2021-12-06 17:17:35,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 17:17:35,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 17:17:35,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:17:35,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:17:35,578 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:17:35,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2005409033] [2021-12-06 17:17:35,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2005409033] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:35,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:17:35,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-06 17:17:35,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656087149] [2021-12-06 17:17:35,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:35,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 17:17:35,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:17:35,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 17:17:35,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=89, Unknown=1, NotChecked=0, Total=110 [2021-12-06 17:17:35,579 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 11 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 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) [2021-12-06 17:17:36,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:36,122 INFO L93 Difference]: Finished difference Result 91 states and 94 transitions. [2021-12-06 17:17:36,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 17:17:36,123 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 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 15 [2021-12-06 17:17:36,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:36,123 INFO L225 Difference]: With dead ends: 91 [2021-12-06 17:17:36,123 INFO L226 Difference]: Without dead ends: 91 [2021-12-06 17:17:36,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=34, Invalid=147, Unknown=1, NotChecked=0, Total=182 [2021-12-06 17:17:36,124 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 28 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:17:36,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 346 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 245 Invalid, 0 Unknown, 130 Unchecked, 0.4s Time] [2021-12-06 17:17:36,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-06 17:17:36,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 84. [2021-12-06 17:17:36,130 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) [2021-12-06 17:17:36,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2021-12-06 17:17:36,131 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 15 [2021-12-06 17:17:36,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:17:36,132 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2021-12-06 17:17:36,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 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) [2021-12-06 17:17:36,132 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2021-12-06 17:17:36,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 17:17:36,133 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:36,133 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:17:36,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-06 17:17:36,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:17:36,334 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)] === [2021-12-06 17:17:36,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:36,336 INFO L85 PathProgramCache]: Analyzing trace with hash -115198833, now seen corresponding path program 1 times [2021-12-06 17:17:36,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:17:36,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [806059552] [2021-12-06 17:17:36,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:36,338 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:17:36,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:17:36,340 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:17:36,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-06 17:17:36,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:36,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:17:36,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:17:36,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:17:36,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:17:36,493 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:17:36,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [806059552] [2021-12-06 17:17:36,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [806059552] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:36,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:17:36,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:17:36,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349646106] [2021-12-06 17:17:36,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:36,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:17:36,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:17:36,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:17:36,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:17:36,494 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) [2021-12-06 17:17:36,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:36,507 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2021-12-06 17:17:36,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:17:36,508 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 [2021-12-06 17:17:36,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:36,508 INFO L225 Difference]: With dead ends: 88 [2021-12-06 17:17:36,508 INFO L226 Difference]: Without dead ends: 88 [2021-12-06 17:17:36,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:17:36,509 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 [2021-12-06 17:17:36,509 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] [2021-12-06 17:17:36,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-06 17:17:36,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 72. [2021-12-06 17:17:36,512 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) [2021-12-06 17:17:36,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-12-06 17:17:36,513 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 15 [2021-12-06 17:17:36,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:17:36,513 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-12-06 17:17:36,513 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) [2021-12-06 17:17:36,513 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-12-06 17:17:36,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 17:17:36,514 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:36,514 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:17:36,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-06 17:17:36,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:17:36,715 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)] === [2021-12-06 17:17:36,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:36,717 INFO L85 PathProgramCache]: Analyzing trace with hash 898943928, now seen corresponding path program 1 times [2021-12-06 17:17:36,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:17:36,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [619819103] [2021-12-06 17:17:36,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:36,719 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:17:36,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:17:36,721 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:17:36,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-06 17:17:36,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:36,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 17:17:36,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:17:36,799 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 [2021-12-06 17:17:36,824 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 5 treesize of output 3 [2021-12-06 17:17:36,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 17:17:36,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 17:17:36,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:17:36,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:17:36,995 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:17:36,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [619819103] [2021-12-06 17:17:36,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [619819103] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:36,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:17:36,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 17:17:36,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508533056] [2021-12-06 17:17:36,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:36,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:17:36,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:17:36,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:17:36,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:17:36,997 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 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) [2021-12-06 17:17:37,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:37,345 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2021-12-06 17:17:37,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:17:37,346 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 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 13 [2021-12-06 17:17:37,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:37,347 INFO L225 Difference]: With dead ends: 83 [2021-12-06 17:17:37,347 INFO L226 Difference]: Without dead ends: 83 [2021-12-06 17:17:37,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:17:37,347 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 22 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:17:37,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 228 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 134 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2021-12-06 17:17:37,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-06 17:17:37,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2021-12-06 17:17:37,350 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) [2021-12-06 17:17:37,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2021-12-06 17:17:37,351 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 13 [2021-12-06 17:17:37,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:17:37,351 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2021-12-06 17:17:37,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 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) [2021-12-06 17:17:37,351 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2021-12-06 17:17:37,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 17:17:37,352 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:37,352 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:17:37,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-06 17:17:37,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:17:37,554 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)] === [2021-12-06 17:17:37,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:37,555 INFO L85 PathProgramCache]: Analyzing trace with hash 898943927, now seen corresponding path program 1 times [2021-12-06 17:17:37,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:17:37,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [187478293] [2021-12-06 17:17:37,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:37,557 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:17:37,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:17:37,559 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:17:37,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-06 17:17:37,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:37,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 17:17:37,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:17:37,619 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 [2021-12-06 17:17:37,642 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 9 treesize of output 7 [2021-12-06 17:17:37,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 17:17:37,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:17:37,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:17:37,746 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:17:37,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [187478293] [2021-12-06 17:17:37,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [187478293] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:37,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:17:37,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 17:17:37,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855960088] [2021-12-06 17:17:37,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:37,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:17:37,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:17:37,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:17:37,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:17:37,751 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 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) [2021-12-06 17:17:38,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:38,024 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2021-12-06 17:17:38,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 17:17:38,025 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 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 13 [2021-12-06 17:17:38,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:38,026 INFO L225 Difference]: With dead ends: 82 [2021-12-06 17:17:38,026 INFO L226 Difference]: Without dead ends: 82 [2021-12-06 17:17:38,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:17:38,027 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 18 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:17:38,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 222 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 142 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2021-12-06 17:17:38,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-06 17:17:38,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2021-12-06 17:17:38,031 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) [2021-12-06 17:17:38,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2021-12-06 17:17:38,032 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 13 [2021-12-06 17:17:38,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:17:38,032 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2021-12-06 17:17:38,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 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) [2021-12-06 17:17:38,032 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2021-12-06 17:17:38,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 17:17:38,033 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:38,033 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:17:38,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-06 17:17:38,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:17:38,234 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)] === [2021-12-06 17:17:38,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:38,235 INFO L85 PathProgramCache]: Analyzing trace with hash 594720773, now seen corresponding path program 1 times [2021-12-06 17:17:38,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:17:38,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [229667121] [2021-12-06 17:17:38,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:38,235 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:17:38,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:17:38,236 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:17:38,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-06 17:17:38,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:38,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 17:17:38,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:17:38,351 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 [2021-12-06 17:17:38,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:17:38,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:17:38,408 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:17:38,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [229667121] [2021-12-06 17:17:38,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [229667121] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:38,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:17:38,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 17:17:38,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639897975] [2021-12-06 17:17:38,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:38,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 17:17:38,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:17:38,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 17:17:38,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:17:38,410 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) [2021-12-06 17:17:38,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:38,745 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2021-12-06 17:17:38,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:17:38,746 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 [2021-12-06 17:17:38,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:38,746 INFO L225 Difference]: With dead ends: 81 [2021-12-06 17:17:38,746 INFO L226 Difference]: Without dead ends: 81 [2021-12-06 17:17:38,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:17:38,747 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 40 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:17:38,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 307 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 17:17:38,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-06 17:17:38,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2021-12-06 17:17:38,749 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) [2021-12-06 17:17:38,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-12-06 17:17:38,750 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 16 [2021-12-06 17:17:38,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:17:38,750 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-12-06 17:17:38,750 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) [2021-12-06 17:17:38,750 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-12-06 17:17:38,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 17:17:38,751 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:38,751 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:17:38,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-06 17:17:38,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:17:38,952 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)] === [2021-12-06 17:17:38,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:38,953 INFO L85 PathProgramCache]: Analyzing trace with hash 594720774, now seen corresponding path program 1 times [2021-12-06 17:17:38,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:17:38,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1993590686] [2021-12-06 17:17:38,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:38,955 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:17:38,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:17:38,956 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:17:38,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-06 17:17:39,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:39,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 17:17:39,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:17:39,041 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 [2021-12-06 17:17:39,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:17:39,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:17:39,159 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:17:39,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1993590686] [2021-12-06 17:17:39,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1993590686] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:39,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:17:39,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 17:17:39,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949256712] [2021-12-06 17:17:39,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:39,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 17:17:39,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:17:39,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 17:17:39,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:17:39,160 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 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) [2021-12-06 17:17:39,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:39,590 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2021-12-06 17:17:39,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 17:17:39,591 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 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 [2021-12-06 17:17:39,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:39,591 INFO L225 Difference]: With dead ends: 82 [2021-12-06 17:17:39,592 INFO L226 Difference]: Without dead ends: 82 [2021-12-06 17:17:39,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-12-06 17:17:39,592 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 43 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:17:39,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 394 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 17:17:39,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-06 17:17:39,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 70. [2021-12-06 17:17:39,594 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) [2021-12-06 17:17:39,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2021-12-06 17:17:39,595 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 16 [2021-12-06 17:17:39,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:17:39,595 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2021-12-06 17:17:39,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 7 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) [2021-12-06 17:17:39,595 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2021-12-06 17:17:39,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 17:17:39,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:39,596 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:17:39,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-06 17:17:39,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:17:39,797 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)] === [2021-12-06 17:17:39,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:39,799 INFO L85 PathProgramCache]: Analyzing trace with hash 296014184, now seen corresponding path program 1 times [2021-12-06 17:17:39,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:17:39,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542290739] [2021-12-06 17:17:39,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:39,801 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:17:39,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:17:39,802 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:17:39,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-06 17:17:39,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:39,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:17:39,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:17:39,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:17:39,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:17:39,917 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:17:39,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [542290739] [2021-12-06 17:17:39,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [542290739] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:39,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:17:39,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:17:39,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118031227] [2021-12-06 17:17:39,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:39,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:17:39,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:17:39,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:17:39,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:17:39,918 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) [2021-12-06 17:17:40,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:40,047 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2021-12-06 17:17:40,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:17:40,048 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 [2021-12-06 17:17:40,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:40,048 INFO L225 Difference]: With dead ends: 69 [2021-12-06 17:17:40,048 INFO L226 Difference]: Without dead ends: 69 [2021-12-06 17:17:40,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:17:40,049 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, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:17:40,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 153 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:17:40,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-06 17:17:40,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-12-06 17:17:40,051 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) [2021-12-06 17:17:40,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-12-06 17:17:40,052 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 18 [2021-12-06 17:17:40,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:17:40,052 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-12-06 17:17:40,052 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) [2021-12-06 17:17:40,052 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-12-06 17:17:40,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 17:17:40,053 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:40,053 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:17:40,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-12-06 17:17:40,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:17:40,254 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)] === [2021-12-06 17:17:40,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:40,256 INFO L85 PathProgramCache]: Analyzing trace with hash 296014185, now seen corresponding path program 1 times [2021-12-06 17:17:40,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:17:40,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [269559546] [2021-12-06 17:17:40,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:40,257 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:17:40,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:17:40,260 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:17:40,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-06 17:17:40,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:40,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 17:17:40,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:17:40,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:17:40,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:17:40,458 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:17:40,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [269559546] [2021-12-06 17:17:40,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [269559546] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:40,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:17:40,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 17:17:40,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102910149] [2021-12-06 17:17:40,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:40,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 17:17:40,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:17:40,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 17:17:40,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:17:40,459 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 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) [2021-12-06 17:17:40,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:40,686 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2021-12-06 17:17:40,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 17:17:40,687 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 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 18 [2021-12-06 17:17:40,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:40,687 INFO L225 Difference]: With dead ends: 68 [2021-12-06 17:17:40,687 INFO L226 Difference]: Without dead ends: 68 [2021-12-06 17:17:40,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:17:40,688 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 37 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:17:40,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 250 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:17:40,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-06 17:17:40,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-12-06 17:17:40,690 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) [2021-12-06 17:17:40,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2021-12-06 17:17:40,690 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 18 [2021-12-06 17:17:40,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:17:40,690 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2021-12-06 17:17:40,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 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) [2021-12-06 17:17:40,691 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2021-12-06 17:17:40,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 17:17:40,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:40,691 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:17:40,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-06 17:17:40,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:17:40,892 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)] === [2021-12-06 17:17:40,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:40,892 INFO L85 PathProgramCache]: Analyzing trace with hash -953601884, now seen corresponding path program 1 times [2021-12-06 17:17:40,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:17:40,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [397743921] [2021-12-06 17:17:40,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:40,892 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:17:40,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:17:40,893 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:17:40,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-06 17:17:40,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:40,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 17:17:40,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:17:41,033 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:17:41,033 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 [2021-12-06 17:17:41,038 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 [2021-12-06 17:17:41,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:17:41,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:17:41,090 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:17:41,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [397743921] [2021-12-06 17:17:41,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [397743921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:41,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:17:41,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 17:17:41,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071779896] [2021-12-06 17:17:41,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:41,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:17:41,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:17:41,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:17:41,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:17:41,091 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 17:17:41,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:41,294 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-12-06 17:17:41,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 17:17:41,294 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-12-06 17:17:41,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:41,295 INFO L225 Difference]: With dead ends: 74 [2021-12-06 17:17:41,295 INFO L226 Difference]: Without dead ends: 74 [2021-12-06 17:17:41,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:17:41,296 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 18 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:17:41,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 274 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2021-12-06 17:17:41,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-06 17:17:41,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2021-12-06 17:17:41,297 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) [2021-12-06 17:17:41,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2021-12-06 17:17:41,298 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 18 [2021-12-06 17:17:41,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:17:41,298 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2021-12-06 17:17:41,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 17:17:41,298 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2021-12-06 17:17:41,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 17:17:41,299 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:41,299 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:17:41,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-12-06 17:17:41,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:17:41,500 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)] === [2021-12-06 17:17:41,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:41,502 INFO L85 PathProgramCache]: Analyzing trace with hash -953703910, now seen corresponding path program 1 times [2021-12-06 17:17:41,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:17:41,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1641140789] [2021-12-06 17:17:41,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:41,503 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:17:41,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:17:41,505 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:17:41,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-06 17:17:41,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:41,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 17:17:41,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:17:41,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:17:41,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:17:41,665 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:17:41,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1641140789] [2021-12-06 17:17:41,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1641140789] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:41,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:17:41,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:17:41,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312449622] [2021-12-06 17:17:41,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:41,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:17:41,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:17:41,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:17:41,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:17:41,667 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-12-06 17:17:41,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:41,724 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2021-12-06 17:17:41,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:17:41,724 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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 18 [2021-12-06 17:17:41,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:41,725 INFO L225 Difference]: With dead ends: 73 [2021-12-06 17:17:41,725 INFO L226 Difference]: Without dead ends: 60 [2021-12-06 17:17:41,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:17:41,725 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 26 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:17:41,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 99 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 84 Unchecked, 0.1s Time] [2021-12-06 17:17:41,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-06 17:17:41,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-12-06 17:17:41,727 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) [2021-12-06 17:17:41,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2021-12-06 17:17:41,728 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 18 [2021-12-06 17:17:41,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:17:41,728 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2021-12-06 17:17:41,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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) [2021-12-06 17:17:41,728 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2021-12-06 17:17:41,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 17:17:41,728 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:41,728 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] [2021-12-06 17:17:41,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-12-06 17:17:41,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:17:41,930 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)] === [2021-12-06 17:17:41,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:41,931 INFO L85 PathProgramCache]: Analyzing trace with hash 783634007, now seen corresponding path program 1 times [2021-12-06 17:17:41,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:17:41,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1249134766] [2021-12-06 17:17:41,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:41,933 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:17:41,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:17:41,935 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:17:41,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-06 17:17:42,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:42,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 17:17:42,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:17:42,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:17:42,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:17:42,159 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:17:42,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1249134766] [2021-12-06 17:17:42,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1249134766] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:42,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:17:42,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 17:17:42,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282527633] [2021-12-06 17:17:42,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:42,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 17:17:42,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:17:42,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 17:17:42,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:17:42,160 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 17:17:42,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:42,275 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2021-12-06 17:17:42,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:17:42,276 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-12-06 17:17:42,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:42,276 INFO L225 Difference]: With dead ends: 59 [2021-12-06 17:17:42,276 INFO L226 Difference]: Without dead ends: 59 [2021-12-06 17:17:42,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:17:42,277 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 47 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:17:42,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 176 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2021-12-06 17:17:42,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-06 17:17:42,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-12-06 17:17:42,278 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) [2021-12-06 17:17:42,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-12-06 17:17:42,279 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 25 [2021-12-06 17:17:42,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:17:42,279 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-12-06 17:17:42,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 17:17:42,279 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-12-06 17:17:42,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-06 17:17:42,280 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:42,280 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] [2021-12-06 17:17:42,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-12-06 17:17:42,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:17:42,481 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)] === [2021-12-06 17:17:42,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:42,483 INFO L85 PathProgramCache]: Analyzing trace with hash 783634008, now seen corresponding path program 1 times [2021-12-06 17:17:42,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:17:42,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1623439272] [2021-12-06 17:17:42,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:42,485 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:17:42,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:17:42,487 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:17:42,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-06 17:17:42,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:42,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 17:17:42,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:17:42,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:17:42,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:17:42,708 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:17:42,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1623439272] [2021-12-06 17:17:42,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1623439272] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:42,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:17:42,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 17:17:42,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966041294] [2021-12-06 17:17:42,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:42,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:17:42,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:17:42,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:17:42,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:17:42,709 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 17:17:42,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:42,984 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-12-06 17:17:42,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 17:17:42,985 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-12-06 17:17:42,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:42,986 INFO L225 Difference]: With dead ends: 58 [2021-12-06 17:17:42,986 INFO L226 Difference]: Without dead ends: 58 [2021-12-06 17:17:42,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:17:42,987 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 46 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:17:42,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 187 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 17:17:42,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-06 17:17:42,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-12-06 17:17:42,988 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) [2021-12-06 17:17:42,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2021-12-06 17:17:42,989 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 25 [2021-12-06 17:17:42,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:17:42,989 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2021-12-06 17:17:42,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 17:17:42,989 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2021-12-06 17:17:42,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 17:17:42,989 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:42,989 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] [2021-12-06 17:17:42,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-06 17:17:43,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:17:43,191 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)] === [2021-12-06 17:17:43,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:43,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1453003897, now seen corresponding path program 1 times [2021-12-06 17:17:43,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:17:43,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [823290874] [2021-12-06 17:17:43,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:43,194 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:17:43,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:17:43,196 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:17:43,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-06 17:17:43,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:43,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-06 17:17:43,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:17:43,301 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 [2021-12-06 17:17:43,554 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 [2021-12-06 17:17:43,560 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 [2021-12-06 17:17:43,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 17:17:43,744 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 17 treesize of output 9 [2021-12-06 17:17:43,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:17:43,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:17:43,811 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:17:43,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [823290874] [2021-12-06 17:17:43,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [823290874] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:43,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:17:43,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-06 17:17:43,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055680595] [2021-12-06 17:17:43,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:43,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 17:17:43,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:17:43,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 17:17:43,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-12-06 17:17:43,812 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 17:17:44,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:44,070 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2021-12-06 17:17:44,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 17:17:44,071 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2021-12-06 17:17:44,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:44,071 INFO L225 Difference]: With dead ends: 66 [2021-12-06 17:17:44,071 INFO L226 Difference]: Without dead ends: 66 [2021-12-06 17:17:44,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-12-06 17:17:44,072 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 24 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:17:44,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 284 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 116 Invalid, 0 Unknown, 101 Unchecked, 0.2s Time] [2021-12-06 17:17:44,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-06 17:17:44,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2021-12-06 17:17:44,074 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) [2021-12-06 17:17:44,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-12-06 17:17:44,074 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 27 [2021-12-06 17:17:44,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:17:44,074 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-12-06 17:17:44,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 17:17:44,075 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-12-06 17:17:44,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 17:17:44,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:44,075 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] [2021-12-06 17:17:44,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-12-06 17:17:44,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:17:44,276 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)] === [2021-12-06 17:17:44,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:44,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1453003896, now seen corresponding path program 1 times [2021-12-06 17:17:44,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:17:44,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [964464407] [2021-12-06 17:17:44,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:44,279 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:17:44,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:17:44,282 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:17:44,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-06 17:17:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:44,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-06 17:17:44,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:17:44,447 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 [2021-12-06 17:17:44,613 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 [2021-12-06 17:17:44,736 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 [2021-12-06 17:17:44,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:17:44,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:17:44,777 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:17:44,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [964464407] [2021-12-06 17:17:44,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [964464407] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:44,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:17:44,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-06 17:17:44,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90008826] [2021-12-06 17:17:44,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:44,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 17:17:44,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:17:44,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 17:17:44,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-12-06 17:17:44,778 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 17:17:45,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:45,004 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2021-12-06 17:17:45,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 17:17:45,005 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2021-12-06 17:17:45,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:45,005 INFO L225 Difference]: With dead ends: 62 [2021-12-06 17:17:45,005 INFO L226 Difference]: Without dead ends: 62 [2021-12-06 17:17:45,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-12-06 17:17:45,006 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 25 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:17:45,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 238 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 101 Invalid, 0 Unknown, 124 Unchecked, 0.1s Time] [2021-12-06 17:17:45,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-06 17:17:45,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2021-12-06 17:17:45,008 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) [2021-12-06 17:17:45,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2021-12-06 17:17:45,008 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 27 [2021-12-06 17:17:45,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:17:45,008 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2021-12-06 17:17:45,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 17:17:45,008 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2021-12-06 17:17:45,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 17:17:45,009 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:45,009 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] [2021-12-06 17:17:45,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-12-06 17:17:45,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:17:45,210 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)] === [2021-12-06 17:17:45,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:45,211 INFO L85 PathProgramCache]: Analyzing trace with hash -2144913277, now seen corresponding path program 1 times [2021-12-06 17:17:45,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:17:45,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1845903181] [2021-12-06 17:17:45,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:45,213 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:17:45,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:17:45,216 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:17:45,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-06 17:17:45,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:45,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-06 17:17:45,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:17:45,328 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 [2021-12-06 17:17:45,495 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 [2021-12-06 17:17:45,620 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 [2021-12-06 17:17:45,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:17:45,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:17:45,719 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:17:45,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1845903181] [2021-12-06 17:17:45,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1845903181] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:45,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:17:45,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-06 17:17:45,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107077592] [2021-12-06 17:17:45,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:45,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 17:17:45,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:17:45,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 17:17:45,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-12-06 17:17:45,720 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 17:17:46,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:46,197 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2021-12-06 17:17:46,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 17:17:46,198 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2021-12-06 17:17:46,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:46,198 INFO L225 Difference]: With dead ends: 77 [2021-12-06 17:17:46,198 INFO L226 Difference]: Without dead ends: 77 [2021-12-06 17:17:46,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-12-06 17:17:46,199 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 49 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:17:46,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 294 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 258 Invalid, 0 Unknown, 151 Unchecked, 0.3s Time] [2021-12-06 17:17:46,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-06 17:17:46,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2021-12-06 17:17:46,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.391304347826087) internal successors, (64), 57 states have internal predecessors, (64), 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) [2021-12-06 17:17:46,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2021-12-06 17:17:46,201 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 32 [2021-12-06 17:17:46,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:17:46,202 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2021-12-06 17:17:46,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 17:17:46,202 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2021-12-06 17:17:46,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 17:17:46,202 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:46,202 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] [2021-12-06 17:17:46,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-12-06 17:17:46,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:17:46,403 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)] === [2021-12-06 17:17:46,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:46,404 INFO L85 PathProgramCache]: Analyzing trace with hash -2144913276, now seen corresponding path program 1 times [2021-12-06 17:17:46,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:17:46,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [273615148] [2021-12-06 17:17:46,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:46,406 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:17:46,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:17:46,408 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:17:46,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-06 17:17:46,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:46,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-06 17:17:46,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:17:46,547 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 [2021-12-06 17:17:46,784 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 [2021-12-06 17:17:46,789 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 [2021-12-06 17:17:46,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 17:17:46,981 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 17 treesize of output 9 [2021-12-06 17:17:47,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:17:47,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:17:47,124 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:17:47,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [273615148] [2021-12-06 17:17:47,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [273615148] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:47,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:17:47,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-06 17:17:47,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995172121] [2021-12-06 17:17:47,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:47,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 17:17:47,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:17:47,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 17:17:47,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-12-06 17:17:47,126 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 18 states, 16 states have (on average 1.5625) internal successors, (25), 14 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 17:17:47,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:47,476 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2021-12-06 17:17:47,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 17:17:47,477 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.5625) internal successors, (25), 14 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2021-12-06 17:17:47,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:47,478 INFO L225 Difference]: With dead ends: 75 [2021-12-06 17:17:47,478 INFO L226 Difference]: Without dead ends: 75 [2021-12-06 17:17:47,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-12-06 17:17:47,478 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 60 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:17:47,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 267 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 185 Invalid, 0 Unknown, 99 Unchecked, 0.2s Time] [2021-12-06 17:17:47,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-06 17:17:47,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2021-12-06 17:17:47,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 57 states have internal predecessors, (62), 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) [2021-12-06 17:17:47,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2021-12-06 17:17:47,481 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 32 [2021-12-06 17:17:47,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:17:47,481 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2021-12-06 17:17:47,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.5625) internal successors, (25), 14 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 17:17:47,481 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2021-12-06 17:17:47,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 17:17:47,481 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:47,482 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] [2021-12-06 17:17:47,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-12-06 17:17:47,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:17:47,683 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)] === [2021-12-06 17:17:47,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:47,684 INFO L85 PathProgramCache]: Analyzing trace with hash -2145015303, now seen corresponding path program 1 times [2021-12-06 17:17:47,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:17:47,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [304184076] [2021-12-06 17:17:47,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:47,686 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:17:47,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:17:47,688 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:17:47,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-06 17:17:47,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:47,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-06 17:17:47,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:17:47,922 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 [2021-12-06 17:17:48,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:17:48,004 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 [2021-12-06 17:17:48,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:17:48,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:17:48,052 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:17:48,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [304184076] [2021-12-06 17:17:48,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [304184076] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:48,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:17:48,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-06 17:17:48,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712894710] [2021-12-06 17:17:48,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:48,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 17:17:48,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:17:48,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 17:17:48,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-12-06 17:17:48,053 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 17:17:48,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:48,494 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2021-12-06 17:17:48,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 17:17:48,495 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2021-12-06 17:17:48,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:48,496 INFO L225 Difference]: With dead ends: 68 [2021-12-06 17:17:48,496 INFO L226 Difference]: Without dead ends: 68 [2021-12-06 17:17:48,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-12-06 17:17:48,497 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 41 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:17:48,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 398 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 17:17:48,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-06 17:17:48,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-12-06 17:17:48,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.326086956521739) internal successors, (61), 57 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) [2021-12-06 17:17:48,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2021-12-06 17:17:48,500 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 32 [2021-12-06 17:17:48,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:17:48,500 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2021-12-06 17:17:48,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 17:17:48,501 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2021-12-06 17:17:48,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-06 17:17:48,501 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:48,501 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] [2021-12-06 17:17:48,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-12-06 17:17:48,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:17:48,702 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)] === [2021-12-06 17:17:48,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:48,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1412027647, now seen corresponding path program 1 times [2021-12-06 17:17:48,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:17:48,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1636114208] [2021-12-06 17:17:48,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:48,705 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:17:48,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:17:48,706 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:17:48,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-06 17:17:48,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:48,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-06 17:17:48,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:17:48,880 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-06 17:17:48,880 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 13 treesize of output 22 [2021-12-06 17:17:48,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:17:48,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2021-12-06 17:17:49,350 INFO L354 Elim1Store]: treesize reduction 9, result has 64.0 percent of original size [2021-12-06 17:17:49,351 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 29 treesize of output 38 [2021-12-06 17:17:49,829 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 [2021-12-06 17:17:49,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:17:49,907 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 [2021-12-06 17:17:49,921 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 [2021-12-06 17:17:49,946 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-06 17:17:49,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 26 [2021-12-06 17:17:50,205 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 [2021-12-06 17:17:50,337 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 30 treesize of output 18 [2021-12-06 17:17:50,793 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 17:17:50,793 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2021-12-06 17:17:50,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:17:50,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:17:50,888 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:17:50,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1636114208] [2021-12-06 17:17:50,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1636114208] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:50,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:17:50,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-06 17:17:50,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355947967] [2021-12-06 17:17:50,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:50,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 17:17:50,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:17:50,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 17:17:50,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-12-06 17:17:50,890 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 24 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 18 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 17:17:51,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:51,657 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-12-06 17:17:51,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 17:17:51,657 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 18 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2021-12-06 17:17:51,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:51,658 INFO L225 Difference]: With dead ends: 70 [2021-12-06 17:17:51,658 INFO L226 Difference]: Without dead ends: 70 [2021-12-06 17:17:51,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-12-06 17:17:51,659 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 39 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:17:51,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 352 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 227 Invalid, 0 Unknown, 230 Unchecked, 0.4s Time] [2021-12-06 17:17:51,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-06 17:17:51,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2021-12-06 17:17:51,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 57 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) [2021-12-06 17:17:51,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2021-12-06 17:17:51,661 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 35 [2021-12-06 17:17:51,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:17:51,661 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2021-12-06 17:17:51,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 18 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 17:17:51,661 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2021-12-06 17:17:51,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-06 17:17:51,662 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:51,662 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] [2021-12-06 17:17:51,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-12-06 17:17:51,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:17:51,863 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_list_delErr5REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 17:17:51,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:51,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1412027648, now seen corresponding path program 1 times [2021-12-06 17:17:51,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:17:51,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [114976747] [2021-12-06 17:17:51,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:51,866 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:17:51,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:17:51,868 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:17:51,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-06 17:17:51,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:52,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 90 conjunts are in the unsatisfiable core [2021-12-06 17:17:52,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:17:52,022 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 [2021-12-06 17:17:52,028 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 [2021-12-06 17:17:52,059 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 10 treesize of output 8 [2021-12-06 17:17:52,062 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 5 treesize of output 3 [2021-12-06 17:17:52,160 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:17:52,160 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 22 [2021-12-06 17:17:52,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 17:17:52,301 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 7 treesize of output 3 [2021-12-06 17:17:52,304 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 7 treesize of output 3 [2021-12-06 17:17:52,647 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 [2021-12-06 17:17:52,658 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 [2021-12-06 17:17:52,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:17:52,749 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 [2021-12-06 17:17:52,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:17:52,758 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 [2021-12-06 17:17:52,795 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-06 17:17:52,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 26 [2021-12-06 17:17:52,832 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-06 17:17:52,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 26 [2021-12-06 17:17:53,142 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 [2021-12-06 17:17:53,148 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 [2021-12-06 17:17:53,843 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:17:53,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 36 [2021-12-06 17:17:53,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-12-06 17:17:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:17:53,990 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:17:53,990 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:17:53,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [114976747] [2021-12-06 17:17:53,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [114976747] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:53,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:17:53,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-12-06 17:17:53,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294392655] [2021-12-06 17:17:53,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:53,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 17:17:53,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:17:53,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 17:17:53,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-12-06 17:17:53,991 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 23 states, 20 states have (on average 1.4) internal successors, (28), 18 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 17:17:54,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:54,439 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2021-12-06 17:17:54,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 17:17:54,440 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.4) internal successors, (28), 18 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2021-12-06 17:17:54,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:54,440 INFO L225 Difference]: With dead ends: 69 [2021-12-06 17:17:54,440 INFO L226 Difference]: Without dead ends: 69 [2021-12-06 17:17:54,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-12-06 17:17:54,441 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:17:54,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 369 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 273 Unchecked, 0.2s Time] [2021-12-06 17:17:54,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-06 17:17:54,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2021-12-06 17:17:54,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 57 states have internal predecessors, (59), 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) [2021-12-06 17:17:54,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2021-12-06 17:17:54,443 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 35 [2021-12-06 17:17:54,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:17:54,443 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2021-12-06 17:17:54,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.4) internal successors, (28), 18 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 17:17:54,444 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2021-12-06 17:17:54,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 17:17:54,444 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:54,444 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, 1] [2021-12-06 17:17:54,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-12-06 17:17:54,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:17:54,645 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_list_delErr6REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 17:17:54,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:54,646 INFO L85 PathProgramCache]: Analyzing trace with hash 823184137, now seen corresponding path program 1 times [2021-12-06 17:17:54,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:17:54,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [468220341] [2021-12-06 17:17:54,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:54,648 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:17:54,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:17:54,650 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:17:54,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-06 17:17:54,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:54,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 61 conjunts are in the unsatisfiable core [2021-12-06 17:17:54,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:17:54,818 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 [2021-12-06 17:17:54,860 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:17:54,860 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 [2021-12-06 17:17:55,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 17:17:55,140 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 [2021-12-06 17:17:55,169 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:17:55,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 17:17:55,511 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 20 [2021-12-06 17:17:55,866 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 17:17:55,866 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 14 [2021-12-06 17:17:55,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:17:55,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:17:55,941 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:17:55,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [468220341] [2021-12-06 17:17:55,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [468220341] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:55,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:17:55,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-12-06 17:17:55,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104899495] [2021-12-06 17:17:55,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:55,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 17:17:55,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:17:55,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 17:17:55,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-12-06 17:17:55,943 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 22 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 17:17:56,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:56,661 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-12-06 17:17:56,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 17:17:56,661 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2021-12-06 17:17:56,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:56,662 INFO L225 Difference]: With dead ends: 68 [2021-12-06 17:17:56,662 INFO L226 Difference]: Without dead ends: 68 [2021-12-06 17:17:56,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 17:17:56,663 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 50 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:17:56,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 188 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 169 Invalid, 0 Unknown, 205 Unchecked, 0.2s Time] [2021-12-06 17:17:56,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-06 17:17:56,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-12-06 17:17:56,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 57 states have internal predecessors, (58), 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) [2021-12-06 17:17:56,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2021-12-06 17:17:56,666 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 36 [2021-12-06 17:17:56,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:17:56,666 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2021-12-06 17:17:56,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 17:17:56,666 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2021-12-06 17:17:56,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 17:17:56,667 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:56,667 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, 1] [2021-12-06 17:17:56,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-12-06 17:17:56,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:17:56,868 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_list_delErr7REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 17:17:56,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:56,869 INFO L85 PathProgramCache]: Analyzing trace with hash 823184138, now seen corresponding path program 1 times [2021-12-06 17:17:56,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:17:56,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1836617904] [2021-12-06 17:17:56,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:56,871 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:17:56,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:17:56,873 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:17:56,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-06 17:17:57,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:57,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-06 17:17:57,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:17:57,055 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 [2021-12-06 17:17:57,063 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 [2021-12-06 17:17:57,135 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:17:57,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-12-06 17:17:57,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 17:17:57,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 17:17:57,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 17:17:57,483 INFO L354 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2021-12-06 17:17:57,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 30 [2021-12-06 17:17:57,513 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 17:17:57,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-06 17:17:58,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:17:58,486 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:17:58,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 40 [2021-12-06 17:17:58,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 15 [2021-12-06 17:17:58,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:17:58,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:17:58,629 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:17:58,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1836617904] [2021-12-06 17:17:58,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1836617904] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:58,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:17:58,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-06 17:17:58,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574456408] [2021-12-06 17:17:58,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:58,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 17:17:58,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:17:58,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 17:17:58,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-12-06 17:17:58,631 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 17:17:59,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:17:59,299 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2021-12-06 17:17:59,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 17:17:59,300 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2021-12-06 17:17:59,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:17:59,300 INFO L225 Difference]: With dead ends: 67 [2021-12-06 17:17:59,300 INFO L226 Difference]: Without dead ends: 67 [2021-12-06 17:17:59,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-12-06 17:17:59,301 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 34 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:17:59,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 178 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 133 Invalid, 0 Unknown, 232 Unchecked, 0.2s Time] [2021-12-06 17:17:59,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-06 17:17:59,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-12-06 17:17:59,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 57 states have internal predecessors, (57), 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) [2021-12-06 17:17:59,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-12-06 17:17:59,303 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 36 [2021-12-06 17:17:59,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:17:59,304 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-12-06 17:17:59,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 17:17:59,304 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-12-06 17:17:59,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 17:17:59,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:17:59,304 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, 1, 1, 1, 1, 1, 1] [2021-12-06 17:17:59,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-12-06 17:17:59,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:17:59,506 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 17:17:59,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:17:59,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1922248378, now seen corresponding path program 1 times [2021-12-06 17:17:59,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:17:59,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [683469847] [2021-12-06 17:17:59,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:17:59,509 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:17:59,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:17:59,511 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:17:59,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-06 17:17:59,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:17:59,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 17:17:59,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:17:59,769 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 28 treesize of output 16 [2021-12-06 17:17:59,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:17:59,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:17:59,784 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:17:59,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [683469847] [2021-12-06 17:17:59,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [683469847] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:17:59,785 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:17:59,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 17:17:59,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198394526] [2021-12-06 17:17:59,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:17:59,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 17:17:59,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:17:59,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 17:17:59,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:17:59,785 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 17:18:00,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:18:00,264 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-12-06 17:18:00,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 17:18:00,265 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2021-12-06 17:18:00,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:18:00,265 INFO L225 Difference]: With dead ends: 70 [2021-12-06 17:18:00,265 INFO L226 Difference]: Without dead ends: 70 [2021-12-06 17:18:00,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-12-06 17:18:00,266 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 33 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:18:00,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 194 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 17:18:00,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-06 17:18:00,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-12-06 17:18:00,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 48 states have (on average 1.25) internal successors, (60), 58 states have internal predecessors, (60), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 17:18:00,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-12-06 17:18:00,268 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 41 [2021-12-06 17:18:00,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:18:00,268 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-12-06 17:18:00,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 17:18:00,268 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-12-06 17:18:00,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 17:18:00,269 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:18:00,269 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, 1, 1, 1, 1, 1, 1] [2021-12-06 17:18:00,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-12-06 17:18:00,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:18:00,470 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 17:18:00,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:18:00,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1922248379, now seen corresponding path program 1 times [2021-12-06 17:18:00,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:18:00,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [8506268] [2021-12-06 17:18:00,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:18:00,473 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:18:00,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:18:00,475 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:18:00,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-12-06 17:18:00,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:18:00,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-06 17:18:00,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:18:00,718 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 [2021-12-06 17:18:00,724 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 [2021-12-06 17:18:00,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-06 17:18:00,761 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 5 treesize of output 3 [2021-12-06 17:18:00,861 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 17:18:00,861 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 18 [2021-12-06 17:18:00,884 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 17:18:00,884 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 [2021-12-06 17:18:01,012 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 7 treesize of output 3 [2021-12-06 17:18:01,015 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 7 treesize of output 3 [2021-12-06 17:18:01,289 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 [2021-12-06 17:18:01,299 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 [2021-12-06 17:18:01,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:18:01,385 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 [2021-12-06 17:18:01,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 17:18:01,395 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 [2021-12-06 17:18:01,430 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-06 17:18:01,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 26 [2021-12-06 17:18:01,472 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-06 17:18:01,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 26 [2021-12-06 17:18:01,801 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 [2021-12-06 17:18:01,813 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 [2021-12-06 17:18:02,223 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:18:02,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 36 [2021-12-06 17:18:02,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-12-06 17:18:02,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:18:02,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:18:02,449 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:18:02,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [8506268] [2021-12-06 17:18:02,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [8506268] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:18:02,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:18:02,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-12-06 17:18:02,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251382685] [2021-12-06 17:18:02,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:18:02,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 17:18:02,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:18:02,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 17:18:02,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-12-06 17:18:02,451 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 21 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 17:18:02,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:18:02,794 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2021-12-06 17:18:02,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 17:18:02,794 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2021-12-06 17:18:02,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:18:02,795 INFO L225 Difference]: With dead ends: 76 [2021-12-06 17:18:02,795 INFO L226 Difference]: Without dead ends: 76 [2021-12-06 17:18:02,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-12-06 17:18:02,796 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 16 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 257 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:18:02,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 363 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 117 Invalid, 0 Unknown, 257 Unchecked, 0.2s Time] [2021-12-06 17:18:02,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-06 17:18:02,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2021-12-06 17:18:02,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 58 states have internal predecessors, (59), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 17:18:02,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2021-12-06 17:18:02,798 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 41 [2021-12-06 17:18:02,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:18:02,798 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2021-12-06 17:18:02,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 17:18:02,798 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2021-12-06 17:18:02,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 17:18:02,799 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:18:02,799 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:18:02,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-12-06 17:18:02,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:18:03,000 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ldv_list_delErr0REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 17:18:03,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:18:03,001 INFO L85 PathProgramCache]: Analyzing trace with hash -291334128, now seen corresponding path program 1 times [2021-12-06 17:18:03,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:18:03,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1395429604] [2021-12-06 17:18:03,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:18:03,003 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:18:03,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:18:03,004 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:18:03,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-12-06 17:18:03,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:18:03,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 17:18:03,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:18:03,348 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 15 [2021-12-06 17:18:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:18:03,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:18:03,538 INFO L354 Elim1Store]: treesize reduction 5, result has 64.3 percent of original size [2021-12-06 17:18:03,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 17:18:03,572 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-12-06 17:18:03,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2021-12-06 17:18:03,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:18:03,654 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:18:03,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1395429604] [2021-12-06 17:18:03,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1395429604] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:18:03,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:18:03,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-12-06 17:18:03,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876195547] [2021-12-06 17:18:03,654 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:18:03,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 17:18:03,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:18:03,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 17:18:03,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-12-06 17:18:03,655 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 11 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 17:18:04,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:18:04,360 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2021-12-06 17:18:04,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 17:18:04,361 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 11 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2021-12-06 17:18:04,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:18:04,361 INFO L225 Difference]: With dead ends: 75 [2021-12-06 17:18:04,362 INFO L226 Difference]: Without dead ends: 75 [2021-12-06 17:18:04,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-12-06 17:18:04,362 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 78 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:18:04,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 239 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 17:18:04,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-06 17:18:04,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2021-12-06 17:18:04,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 61 states have internal predecessors, (64), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 17:18:04,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2021-12-06 17:18:04,365 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 46 [2021-12-06 17:18:04,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:18:04,366 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2021-12-06 17:18:04,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 11 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 17:18:04,366 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2021-12-06 17:18:04,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 17:18:04,366 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:18:04,366 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:18:04,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-12-06 17:18:04,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:18:04,567 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ldv_list_delErr1REQUIRES_VIOLATION === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 17:18:04,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:18:04,568 INFO L85 PathProgramCache]: Analyzing trace with hash -291334127, now seen corresponding path program 1 times [2021-12-06 17:18:04,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:18:04,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1433608989] [2021-12-06 17:18:04,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:18:04,570 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:18:04,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:18:04,572 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:18:04,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-12-06 17:18:04,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:18:04,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-06 17:18:04,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:18:05,091 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 29 treesize of output 17 [2021-12-06 17:18:05,094 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 20 [2021-12-06 17:18:05,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:18:05,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:18:06,600 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:18:06,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 46 [2021-12-06 17:18:09,868 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:18:09,868 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 32 treesize of output 34 [2021-12-06 17:18:12,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:18:12,877 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 17:18:12,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1433608989] [2021-12-06 17:18:12,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1433608989] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:18:12,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 17:18:12,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-12-06 17:18:12,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347805901] [2021-12-06 17:18:12,877 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 17:18:12,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 17:18:12,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 17:18:12,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 17:18:12,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-12-06 17:18:12,878 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 26 states, 25 states have (on average 2.16) internal successors, (54), 20 states have internal predecessors, (54), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-06 17:18:16,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:18:16,404 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2021-12-06 17:18:16,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 17:18:16,405 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 20 states have internal predecessors, (54), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 46 [2021-12-06 17:18:16,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:18:16,406 INFO L225 Difference]: With dead ends: 78 [2021-12-06 17:18:16,406 INFO L226 Difference]: Without dead ends: 78 [2021-12-06 17:18:16,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=160, Invalid=1030, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 17:18:16,407 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 83 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 17:18:16,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 385 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 390 Invalid, 0 Unknown, 157 Unchecked, 1.8s Time] [2021-12-06 17:18:16,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-06 17:18:16,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2021-12-06 17:18:16,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 62 states have internal predecessors, (64), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 17:18:16,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2021-12-06 17:18:16,409 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 46 [2021-12-06 17:18:16,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:18:16,409 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2021-12-06 17:18:16,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 20 states have internal predecessors, (54), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-06 17:18:16,409 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2021-12-06 17:18:16,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 17:18:16,410 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:18:16,410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:18:16,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-12-06 17:18:16,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:18:16,611 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ldv_list_addErr0REQUIRES_VIOLATION, ldv_list_addErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION (and 21 more)] === [2021-12-06 17:18:16,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:18:16,612 INFO L85 PathProgramCache]: Analyzing trace with hash -291436154, now seen corresponding path program 1 times [2021-12-06 17:18:16,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 17:18:16,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1870073007] [2021-12-06 17:18:16,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:18:16,614 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 17:18:16,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 17:18:16,616 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 17:18:16,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-12-06 17:18:16,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:18:16,807 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 17:18:16,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:18:16,955 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-12-06 17:18:16,955 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-06 17:18:16,956 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (24 of 25 remaining) [2021-12-06 17:18:16,957 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_addErr0REQUIRES_VIOLATION (23 of 25 remaining) [2021-12-06 17:18:16,957 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_addErr1REQUIRES_VIOLATION (22 of 25 remaining) [2021-12-06 17:18:16,957 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (21 of 25 remaining) [2021-12-06 17:18:16,957 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (20 of 25 remaining) [2021-12-06 17:18:16,957 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (19 of 25 remaining) [2021-12-06 17:18:16,958 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (18 of 25 remaining) [2021-12-06 17:18:16,958 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (17 of 25 remaining) [2021-12-06 17:18:16,958 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (16 of 25 remaining) [2021-12-06 17:18:16,958 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr0REQUIRES_VIOLATION (15 of 25 remaining) [2021-12-06 17:18:16,958 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr1REQUIRES_VIOLATION (14 of 25 remaining) [2021-12-06 17:18:16,958 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr2REQUIRES_VIOLATION (13 of 25 remaining) [2021-12-06 17:18:16,958 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr3REQUIRES_VIOLATION (12 of 25 remaining) [2021-12-06 17:18:16,958 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr4REQUIRES_VIOLATION (11 of 25 remaining) [2021-12-06 17:18:16,958 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr5REQUIRES_VIOLATION (10 of 25 remaining) [2021-12-06 17:18:16,958 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr6REQUIRES_VIOLATION (9 of 25 remaining) [2021-12-06 17:18:16,958 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_list_delErr7REQUIRES_VIOLATION (8 of 25 remaining) [2021-12-06 17:18:16,958 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr0REQUIRES_VIOLATION (7 of 25 remaining) [2021-12-06 17:18:16,958 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr1REQUIRES_VIOLATION (6 of 25 remaining) [2021-12-06 17:18:16,958 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr2REQUIRES_VIOLATION (5 of 25 remaining) [2021-12-06 17:18:16,959 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr3REQUIRES_VIOLATION (4 of 25 remaining) [2021-12-06 17:18:16,959 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr4REQUIRES_VIOLATION (3 of 25 remaining) [2021-12-06 17:18:16,959 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr5REQUIRES_VIOLATION (2 of 25 remaining) [2021-12-06 17:18:16,959 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr6REQUIRES_VIOLATION (1 of 25 remaining) [2021-12-06 17:18:16,959 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location __ldv_list_addErr7REQUIRES_VIOLATION (0 of 25 remaining) [2021-12-06 17:18:16,968 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-12-06 17:18:17,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 17:18:17,165 INFO L732 BasicCegarLoop]: Path program 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] [2021-12-06 17:18:17,167 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 17:18:17,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 05:18:17 BoogieIcfgContainer [2021-12-06 17:18:17,215 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 17:18:17,215 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 17:18:17,215 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 17:18:17,216 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 17:18:17,216 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:17:26" (3/4) ... [2021-12-06 17:18:17,219 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-06 17:18:17,219 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 17:18:17,219 INFO L158 Benchmark]: Toolchain (without parser) took 51420.69ms. Allocated memory was 56.6MB in the beginning and 88.1MB in the end (delta: 31.5MB). Free memory was 33.8MB in the beginning and 52.3MB in the end (delta: -18.6MB). Peak memory consumption was 11.7MB. Max. memory is 16.1GB. [2021-12-06 17:18:17,220 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 56.6MB. Free memory is still 37.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 17:18:17,220 INFO L158 Benchmark]: CACSL2BoogieTranslator took 460.83ms. Allocated memory was 56.6MB in the beginning and 73.4MB in the end (delta: 16.8MB). Free memory was 33.6MB in the beginning and 54.5MB in the end (delta: -20.9MB). Peak memory consumption was 14.6MB. Max. memory is 16.1GB. [2021-12-06 17:18:17,220 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.62ms. Allocated memory is still 73.4MB. Free memory was 54.5MB in the beginning and 52.1MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 17:18:17,220 INFO L158 Benchmark]: Boogie Preprocessor took 23.91ms. Allocated memory is still 73.4MB. Free memory was 52.1MB in the beginning and 50.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 17:18:17,221 INFO L158 Benchmark]: RCFGBuilder took 440.98ms. Allocated memory is still 73.4MB. Free memory was 50.3MB in the beginning and 51.7MB in the end (delta: -1.4MB). Peak memory consumption was 14.8MB. Max. memory is 16.1GB. [2021-12-06 17:18:17,221 INFO L158 Benchmark]: TraceAbstraction took 50446.58ms. Allocated memory was 73.4MB in the beginning and 88.1MB in the end (delta: 14.7MB). Free memory was 51.4MB in the beginning and 53.2MB in the end (delta: -1.8MB). Peak memory consumption was 13.8MB. Max. memory is 16.1GB. [2021-12-06 17:18:17,221 INFO L158 Benchmark]: Witness Printer took 3.53ms. Allocated memory is still 88.1MB. Free memory was 53.2MB in the beginning and 52.3MB in the end (delta: 850.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 17:18:17,223 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 56.6MB. Free memory is still 37.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 460.83ms. Allocated memory was 56.6MB in the beginning and 73.4MB in the end (delta: 16.8MB). Free memory was 33.6MB in the beginning and 54.5MB in the end (delta: -20.9MB). Peak memory consumption was 14.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.62ms. Allocated memory is still 73.4MB. Free memory was 54.5MB in the beginning and 52.1MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 23.91ms. Allocated memory is still 73.4MB. Free memory was 52.1MB in the beginning and 50.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 440.98ms. Allocated memory is still 73.4MB. Free memory was 50.3MB in the beginning and 51.7MB in the end (delta: -1.4MB). Peak memory consumption was 14.8MB. Max. memory is 16.1GB. * TraceAbstraction took 50446.58ms. Allocated memory was 73.4MB in the beginning and 88.1MB in the end (delta: 14.7MB). Free memory was 51.4MB in the beginning and 53.2MB in the end (delta: -1.8MB). Peak memory consumption was 13.8MB. Max. memory is 16.1GB. * Witness Printer took 3.53ms. Allocated memory is still 88.1MB. Free memory was 53.2MB in the beginning and 52.3MB in the end (delta: 850.9kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 779]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 779. Possible FailurePath: [L569] struct ldv_list_head ldv_global_msg_list = { &(ldv_global_msg_list), &(ldv_global_msg_list) }; VAL [ldv_global_msg_list={1:0}] [L780] CALL entry_point() [L775] struct ldv_list_head list_14 = { &(list_14), &(list_14) }; [L776] CALL alloc_14(&list_14) [L762] CALL, EXPR ldv_malloc(sizeof(struct A14)) VAL [\old(size)=12, ldv_global_msg_list={1:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); [L762] RET, EXPR ldv_malloc(sizeof(struct A14)) VAL [ldv_global_msg_list={1:0}, ldv_malloc(sizeof(struct A14))={2:0}, list={-2147483647:0}, list={-2147483647:0}] [L762] struct A14 *p = (struct A14 *)ldv_malloc(sizeof(struct A14)); [L763] COND TRUE \read(*p) VAL [ldv_global_msg_list={1:0}, list={-2147483647:0}, list={-2147483647:0}, p={2:0}] [L764] CALL ldv_list_add(&p->list, list) VAL [head={-2147483647:0}, ldv_global_msg_list={1:0}, new={2:4}] [L559] EXPR head->next VAL [head={-2147483647:0}, head={-2147483647:0}, head->next={-2147483647:0}, ldv_global_msg_list={1:0}, new={2:4}, new={2:4}] [L559] CALL __ldv_list_add(new, head, head->next) VAL [ldv_global_msg_list={1:0}, new={2:4}, next={-2147483647:0}, prev={-2147483647:0}] [L547] next->prev = new VAL [ldv_global_msg_list={1:0}, new={2:4}, new={2:4}, next={-2147483647:0}, next={-2147483647:0}, prev={-2147483647:0}, prev={-2147483647:0}] [L548] new->next = next VAL [ldv_global_msg_list={1:0}, new={2:4}, new={2:4}, next={-2147483647:0}, next={-2147483647:0}, prev={-2147483647:0}, prev={-2147483647:0}] [L549] new->prev = prev VAL [ldv_global_msg_list={1:0}, new={2:4}, new={2:4}, next={-2147483647:0}, next={-2147483647:0}, prev={-2147483647:0}, prev={-2147483647:0}] [L550] prev->next = new VAL [ldv_global_msg_list={1:0}, new={2:4}, new={2:4}, next={-2147483647:0}, next={-2147483647:0}, prev={-2147483647:0}, prev={-2147483647:0}] [L559] RET __ldv_list_add(new, head, head->next) VAL [head={-2147483647:0}, head={-2147483647:0}, head->next={-2147483647:0}, ldv_global_msg_list={1:0}, new={2:4}, new={2:4}] [L764] RET ldv_list_add(&p->list, list) VAL [ldv_global_msg_list={1:0}, list={-2147483647:0}, list={-2147483647:0}, p={2:0}] [L776] RET alloc_14(&list_14) [L777] CALL free_unsafe_14(&list_14) [L768] struct A14 *p; [L769] struct A14 *n; VAL [ldv_global_msg_list={1:0}, plist={-2147483647:0}, plist={-2147483647:0}] [L770] EXPR (plist)->next VAL [(plist)->next={2:4}, ldv_global_msg_list={1:0}, plist={-2147483647:0}, plist={-2147483647:0}] [L770] const typeof( ((typeof(*p) *)0)->list ) *__mptr = ((plist)->next); [L770] p = ({ const typeof( ((typeof(*p) *)0)->list ) *__mptr = ((plist)->next); (typeof(*p) *)( (char *)__mptr - ((size_t) &((typeof(*p) *)0)->list) );}) VAL [__mptr={2:4}, ldv_global_msg_list={1:0}, p={2:0}, plist={-2147483647:0}, plist={-2147483647:0}] [L770] EXPR (p)->list.next VAL [(p)->list.next={-2147483647:0}, __mptr={2:4}, ldv_global_msg_list={1:0}, p={2:0}, plist={-2147483647:0}, plist={-2147483647:0}] [L770] const typeof( ((typeof(*(p)) *)0)->list ) *__mptr = ((p)->list.next); [L770] n = ({ const typeof( ((typeof(*(p)) *)0)->list ) *__mptr = ((p)->list.next); (typeof(*(p)) *)( (char *)__mptr - ((size_t) &((typeof(*(p)) *)0)->list) );}) VAL [__mptr={2:4}, __mptr={-2147483647:0}, ldv_global_msg_list={1:0}, n={-2147483647:-4}, p={2:0}, plist={-2147483647:0}, plist={-2147483647:0}] [L770] COND TRUE &p->list != (plist) VAL [__mptr={-2147483647:0}, __mptr={2:4}, ldv_global_msg_list={1:0}, n={-2147483647:-4}, p={2:0}, plist={-2147483647:0}, plist={-2147483647:0}] [L771] CALL ldv_list_del(&p->list) VAL [ldv_global_msg_list={1:0}] [L567] EXPR entry->prev VAL [entry={2:4}, entry={2:4}, entry->prev={-2147483647:0}, ldv_global_msg_list={1:0}] [L567] EXPR entry->next VAL [entry={2:4}, entry={2:4}, entry->next={-2147483647:0}, entry->prev={-2147483647:0}, ldv_global_msg_list={1:0}] [L567] CALL __ldv_list_del(entry->prev, entry->next) [L554] next->prev = prev VAL [ldv_global_msg_list={1:0}, next={-2147483647:0}, next={-2147483647:0}, prev={-2147483647:0}, prev={-2147483647:0}] [L555] prev->next = next VAL [ldv_global_msg_list={1:0}, next={-2147483647:0}, next={-2147483647:0}, prev={-2147483647:0}, prev={-2147483647:0}] [L567] RET __ldv_list_del(entry->prev, entry->next) [L771] RET ldv_list_del(&p->list) VAL [__mptr={-2147483647:0}, __mptr={2:4}, ldv_global_msg_list={1:0}, n={-2147483647:-4}, p={2:0}, plist={-2147483647:0}, plist={-2147483647:0}] [L770] p = n VAL [__mptr={-2147483647:0}, __mptr={2:4}, ldv_global_msg_list={1:0}, n={-2147483647:-4}, p={-2147483647:-4}, plist={-2147483647:0}, plist={-2147483647:0}] [L770] EXPR (n)->list.next VAL [(n)->list.next={-2147483647:0}, __mptr={-2147483647:0}, __mptr={2:4}, ldv_global_msg_list={1:0}, n={-2147483647:-4}, p={-2147483647:-4}, plist={-2147483647:0}, plist={-2147483647:0}] [L770] const typeof( ((typeof(*(n)) *)0)->list ) *__mptr = ((n)->list.next); [L770] n = ({ const typeof( ((typeof(*(n)) *)0)->list ) *__mptr = ((n)->list.next); (typeof(*(n)) *)( (char *)__mptr - ((size_t) &((typeof(*(n)) *)0)->list) );}) VAL [__mptr={-2147483647:0}, __mptr={2:4}, __mptr={-2147483647:0}, ldv_global_msg_list={1:0}, n={-2147483647:-4}, p={-2147483647:-4}, plist={-2147483647:0}, plist={-2147483647:0}] [L770] COND FALSE !(&p->list != (plist)) VAL [__mptr={2:4}, __mptr={-2147483647:0}, __mptr={-2147483647:0}, ldv_global_msg_list={1:0}, n={-2147483647:-4}, p={-2147483647:-4}, plist={-2147483647:0}, plist={-2147483647:0}] [L777] RET free_unsafe_14(&list_14) [L775] struct ldv_list_head list_14 = { &(list_14), &(list_14) }; VAL [ldv_global_msg_list={1:0}] [L780] RET entry_point() - UnprovableResult [Line: 559]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 559]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 770]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 770]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 770]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 770]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 770]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 770]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 567]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 567]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 567]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 567]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 72 locations, 25 error locations. Started 1 CEGAR loops. OverallTime: 50.4s, OverallIterations: 32, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 16.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1302 SdHoareTripleChecker+Valid, 8.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1267 mSDsluCounter, 7775 SdHoareTripleChecker+Invalid, 7.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2326 IncrementalHoareTripleChecker+Unchecked, 6330 mSDsCounter, 173 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5075 IncrementalHoareTripleChecker+Invalid, 7574 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 173 mSolverCounterUnsat, 1445 mSDtfsCounter, 5075 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 924 GetRequests, 488 SyntacticMatches, 14 SemanticMatches, 422 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 19.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=84occurred in iteration=7, InterpolantAutomatonStates: 386, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 31 MinimizatonAttempts, 207 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 23.7s InterpolantComputationTime, 794 NumberOfCodeBlocks, 794 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 807 ConstructedInterpolants, 213 QuantifiedInterpolants, 11950 SizeOfPredicates, 435 NumberOfNonLiveVariables, 4333 ConjunctsInSsa, 855 ConjunctsInUnsatCore, 33 InterpolantComputations, 29 PerfectInterpolantSequences, 0/16 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-06 17:18:17,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ceceb001-95eb-4d81-b1bc-d82701a3cad8/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample